minutes of - wrpc.nic.in
TRANSCRIPT
Minutes of2nd REIF (Renewable Energy Integration Forum)
Meeting in Western Region at WRPC on 21.08.2017.
A meeting of 2nd REIF of Western Region was held on 21.08.2017 at WRPC
Mumbai. List of participants is attached herewith.
Member Secretary, WRPC welcomed all the participants of 2nd REIF meeting in
Western Region. He stated that with increasing RE penetration, the issues
related to system operation as well as RE generation needs to be discussed and
resolved addressing the issues for maximum utilization of RE generation &
optimum utilization of conventional generations. He stated that following points
are to be covered during the meeting:
I. Effect of variability of RE generation.
II. Transmission & distribution constraints in integration of RES
III. Telemetry/Communication
IV. Compliance of CEA/CERC Regulation on LVRT
V. Voltage regulation by RES
VI. ForecastingVII. Any other issues if any.
He requested all concerns for active participation to amicable resolution of
issues. Thereafter he requested Executive Engineer (Opn) to take up the
agenda items.
Executive Engineer (Opn), WRPC welcomed all the participants once again. He
stated that agenda items are in following three folds:
1. System Operation’s concerns.
2. RE generators concerns.
3. Regulatory compliances.
Item no.1 Effect of variability of solar & wind generation
1. Effect of variability of RES generation, assessment of loss of generation &revenue, because of backing down of cheaper source of conventionalgeneration.
2. Proposed utilization of State’s own balancing plants.3. Losses in DSM purely on account of variability of renewable generation.4. Any measure taken by WRLDC/SLDC for economical green energy
absorption in the grid or any proposed plan.
Discussions:
Chief Engineer, SLDC Maharashtra stated that variability of RES
penetration has huge impact on backing down of cheaper source of
conventional generation, balancing from state resources and finally on DSM,
which leads to huge commercial impact on state system. Due to lack of
telemetry of RES, it is difficult for system operators to take decision. He told
that blind operation of several RE sources may be one of the challenges for
the system operators. MP & Gujarat endorsed the same.
Chief Engineer, SLDC Gujarat suggested that better telemetry & forecasting
may help in system operation & finally reduce the commercial impact.
Member Secretary, advised RE generators to furnish the FTP data as well as
real time data. He further requested SLDC’s for better forecasting of RE
generation.
The participants noted as above.
Item no. 2 Transmission & distribution constraints in integration of RES
Any Transmission & distribution constraints faced by STU/Discom inintegration of RES generation, if so necessary augmentation of T & Dinfrastructure which needs to be undertaken- scope & financial estimates forthe same shall also be discussed.
Discussions:
Executive Engineer (Opn), WRPC requested WRLDC for making a presentation
on RE scenario in WR. CM, WRLDC made presentation on the same (copy
enclosed).
During the presentation, WRLDC stated that the maximum generation from
Wind RES in Western Region was 7885 MW at 1100 hrs on 04.07.2017 which
was around 21 % of the instantaneous demand met in the region. At the State
level the maximum generation from Wind RES in Gujarat was 3763 MW on
05.07.2017 (35.1% of demand met); in Maharashtra was 3002 MW on
24.07.2017 (18.1 % of demand met); in Madhya Pradesh was 1779 MW on
25.07.2017 (34.7 % of demand met). Conventional generation was backed
down and few of the thermal units were taken under reserve shutdown and the
entire generation from RES was absorbed.
It was stated by WRLDC that no transmission constraints were experienced for
evacuation of RES in Western Region in this season even when the penetration
of RES in MW terms as well as MWh terms was significantly high.
Representative from States endorsed the same.
CE, SLDC Maharashtra stated that transmission planning for evacuation of RE
generation is under STU. They planned after detailed study & then only allow
any connectivity. Other SLDC’s representative endorsed the same.
Member Secretary, WRPC suggested that it is essential to monitor all the green
corridor project & requested all RE developers to adhere with timelines of the
ongoing green corridor transmission projects.
The participants noted as the same.
Item no.3 Telemetry/Communication
With increase in high penetration of wind into the grid it is very much requiredthe visibility of Renewable generation at Control Centers SLDCs and RLDC .The system operator is almost blind folded in real time with non -availability ofreal time data about huge quantum of wind generation and solar generation .As per IEGC clause 5.2(u) Special requirements for Solar/ wind generators
Quote:“System operator (SLDC/ RLDC) shall make all efforts to evacuate theavailable solar and wind power and treat as a must-run station.However, System operator may instruct the solar /wind generator to backdown generation on consideration of grid security or safety of any equipment orpersonnel is endangered and Solar/ wind generator shall comply with thesame. For this, Data Acquisition System facility shall be provided fortransfer of information to concerned SLDC and RLDC.(i)SLDC/RLDC may direct a wind farm to curtail its VAr drawl/injection in casethe security of grid or safety of any equipment or personnel is endangered.(ii) During the wind generator start-up, the wind generator shall ensure thatthe reactive power drawl (inrush currents in case of induction generators) shallnot affect the grid performance. "
Unquote:
IEGC Clause 6.2Quote“This code also provides the methodology for re-scheduling of wind and solarenergy generators which are regional entities, on one and half hourly basis andthe methodology of handling deviations of such wind and solar energygenerators. Appropriate meters shall be provided for accounting of charges fordeviation under DSM Regulations. Telemetry/communication system &Data Acquisition System shall also be provided for transfer of informationto the concerned SLDC and RLDC.”Unquote
The first meeting of Renewable Integration Forum was held at WRPCSecretariat on 21.04.2017 with wind developers of Maharashtra, SLDCMaharashtra , WRLDC and WRPC. The outcome of the First meeting wasextremely successful and within 15 days the visibility of Maharashtra wind atWRLDC has gone to 1660 MW (M/s Suzlon) out of the total Installed capacityof wind of 4662 MW in Maharashtra. Subsequently Panama wind generator of74 MW capacity and Re-Gen of 45 MW started data transfer in 10 minutesinterval through ftp to WRLDC. But no other generators are transferring thewind generation data to WRLDC. As already wind season is peaking up andgeneration is more than 5000 MW everyday , it is necessary to have telemetryat WRLDC.
In last REIF meeting it has been decided that all wind generators ofMaharashtra would furnish the average MW generation in 10 minutes ofintervals to SLDC, Maharashtra. The data shall contain Date, Time, plant,average MW etc. To begin with, this data shall be sent by email to SLDC andSLDC would integrate the data in SCADA and also configure on ICCP forWRLDC. Further this is an interim measure to enhance the visibility of REGenerator in Maharashtra and facilitate the load dispatchers in the immediatewind peak season. For Medium term measures it is to integrate the poolingstation wise real time data to SLDC and as a long term arrangement, STU shallplan to integrate the RE data from pooling station to SLDC.SLDC shall soon develop a web portal to facilitate the data entrydirectly/uploading of file in the next step.
The status of RES telemetry in Maharashtra and WRLDC in the month ofAug’17 is given below. The observability of RES telemetry in Maharashtra is55%.
Following Wind developers in Maharashtra are sending pooling data to WLRDCvia FTP
S.No Wind developer Installed capacity of Wind whosedata is being pooled through FTP(As informed by Wind Developer)
1 Suzlon 1663 MW
2 Regen 507 MW
3 Continum 80 MW
4 Gamesha 247 MW
5 Panama 72 MW
6 Reliance Global 45 MW
Total 2614 MW
Following Wind developer’s data are in pipeline for pooling data to WLRDCvia FTP
1. Senvion/Kenersys2. Maruti Wind3. Windword/Enercon4. TS Wind5. Inox Wind6. Vestas Wind
The present status of Telemetred RES at WRLDC is as followsState/Regio
nRES
InstalledCapacity
(Wind+Solar)in MW
Telemetered RESCapacity at
WRLDC(Wind+Solar) in
MW
% of RESVisibility/Observabilit
y at SLDC/WRLDC
Gujarat 6578(5348+1230)
6566 (5339+1227) 99.8
Maharashtra 5145(4769+376)
2844 (2614+230) 55.3
MadhyaPradesh
3263(2428+835)
3213 (2378+835) 98.5
Chhattisgarh 76 (0+76) 66 (0+66) 86.8Diu 10 (0+10) 0 0Daman 4.1 (0+4.1) 0 0WR 15076
(12545+2531)
12689(10331+2538)
84.2
Discussions:
a) WRLDC
WRLDC stated that telemetry of RES is mandated by IEGC regulation 5.2 (u)
and 6.2 and it is essential for real-time supervision of the grid and
facilitating must run despatch of the RES. A comparison of the RES
telemetry and the post despatch RES generation data submitted by SLDCs
was shown in presentation. It was noted that the figures were matching for
Gujarat and Madhya Pradesh but there was a huge difference between
telemetry and actual injection of RES in Maharashtra.
It was explained that during the 1stREIF meeting it was decided that the
RES whose real-time telemetry is not available in SLDC shall provide the
RES injection to SLDC and WRLDC at every 10 minute interval through file
transfer protocol (FTP) as an interim measure. Subsequently the real-time
telemetry from RES shall be provided to SLDC and WRLDC on IEC 104
protocol.
WRLDC shared that only 58.86 % of installed RES capacity in Maharashtra
was observable via ftp / SCADA whereas in Gujarat and Madhya Pradesh
the observability of RES is 99.83 % and 97.94 % of the installed RES
capacity respectively.
WRLDC informed that the data from Senvion/Kenersys, Maruti Wind,
Windword/Enercon, TS Wind and Vestas Wind through ftp was still
pending.
WRLDC representative stated that to avail the must run status, visibility in
real time at control center is mandated as per IEGC.
b) SLDC, Maharashtra
CE SLDC, Kalwa stated that cyclic data through ftp was not made available
from several RES in Maharashtra even after four months of the 1st REIF
meeting and notice for disconnection from grid had been issued to them by
MSEDCL in line with their PPA. SLDC Kalwa explained that the format for
sending the cyclic data (through ftp) was available on their website at the
following URL http://mahasldc.in/re-data/.
He further stated that a separate project for establishing communication
link from the STU pooling points to SLDC-Kalwa and for commissioning
RTUs at STU substations had been envisaged in Maharashtra. MSETCL was
requested to expedite execution of the project and it was decided that
Concerned representative from MSETCL may be invited in the next meeting
to apprise about the progress of the above project.
SLDC, Kalwa informed that they are receiving real time data of wind RES
from some of the pooling stations. WRLDC requested SLDC, Kalwa to
provide the same to RLDC on ICCP.
c) RE Developers
M/s Suzlon informed that they will be providing real time data of their wind
farms at SLDC, Kalwa in 4 to 6 weeks.
The RES developers committed to provide the cyclic data through ftp within
15-days and requested MSEDCL to allow them to reconnect to the grid so as
to avoid the generation loss in the high wind season. MSEDCL stated that
the concern of the RES shall be conveyed to their management for decision.
Member Secretary requested all RE generators to transfer the data toSLDC/RLDC in static/real time.
The group noted as above.
Item no. 4 Compliance of CEA/CERC Regulation on LVRT
LVRT/FRT is a capability of an electrical device to operate through periods of
low grid voltage. LVRT provision in a device viz. Wind/Solar Generator boosts
the terminal voltage at the grid interconnection point following voltage dip
caused by a transient fault, thereby providing transient stability support
Regulation Part II (B2) (3) and Part II (B3) of the CEA (Technical Standards for
Connectivity to the Grid) Amendment Regulations, 2013 notified on 15th
October 2013 mandates as under:
“B2. For generating station getting connected on or after completion of 6months from date of publication of these Regulations in the OfficialGazette.
…
(3) Wind generating stations connected at voltage level of 66 kV and above shall
remain connected to the grid when the voltage at the interconnection point on
any or all phases dips upto the levels depicted by the thick lines in the
following curve:
Provided that during the voltage dip, the individual wind generating units in
the generating station shall generate active power in proportion to the retained
voltage;
Provided further that during voltage dip, the generating station shall maximize
supply of reactive current till the time voltage starts recovering or for 300 ms,
whichever time is lower.”
“B3. For generating units which are connected before and upto 6 months after
the date of publication of these Regulations in the Official Gazette
The generating company and the licensee of the electricity system to which the
generating station is connected shall mutually discuss and agree on the
measures which can be taken to meet the standards specified in (B1) and (B2)
subject to technical feasibility.”
With regards to LVRT compliance by wind generators commissioned before
15.04.2014, Hon’ble Central Electricity Regulatory Commission vide its order
dated 05.01.16 in Petition No.420/MP/2014 mandated that
“………We are of the view that LVRT should be implemented for all windturbines commissioned before 15.4.2014 and connected to voltage levelof 66 kV and above except for Stall Type WTGs, which are not
technically feasible to be retrofitted with LVRT. However, keeping in viewthe suggestions of IWTMA, we are of the view that presently LVRT shouldbe implemented for all wind turbines (except Stall Types) commissionedbefore 15.04.2014 having installed capacity equal to or more than 500KW.”
Vide the same order CERC advised monitoring of installation and performance
of LVRT on existing LVRTs. Relevant extracts are quoted below:
“…….With regard to monitoring of the installation and performance ofLVRT installed on existing WTGs, we direct SLDCs to prepare quarterlyreports and submit it to RPCs. RPCs are directed to validate the reportssubmitted by SLDCs in consultation with RLDCs and report anydeficiency and non-compliance to the Commission in accordance withlaw.
In view of the above, grid connected Wind Generators shall be LVRTcompliant.
Discussions:
WRLDC stated that as per the CEA Technical Standards, the LVRT /FRT
facility is mandated for all Wind RES connected at 66 kV level so that they
remain connected to the grid even if the voltage dips to 0.15 pu for 300 msec at
the interconnection point and the subsequent voltage recovery is better than
the given curve. It was explained that the loss of wind generation during a
voltage dip caused by fault could lead to major disturbance in the grid.
WRLDC shared that the CERC order dated 05.01.2016 mandated that all Wind
RES commissioned after 15.04.2014 shall ensure LVRT/FRT facility while
those commissioned before 15.04.2014 may go for retrofitting.
Further vide order dated 05.01.16, CERC mandated that presently LVRT
should be implemented for all wind turbines ( except stall type) commissioned
before 15.04.14 having installed capacity equal to or more than 500 kW.
WRLDC shared that the information from RES in Maharashtra was still
pending and Gujarat and Maharashtra have submitted partial details of LVRT.
SLDC, Maharashtra was requested to submit the LVRT details and RES
developers from Gujarat and Madhya Pradesh were requested to furnish the
missing details in the data submitted by them. The capacity which are
exempted from LVRT compliance (stall type turbines and turbines with up to
500 KW capacity) shall also be informed explicitly.
Member Secretary requested all states to indicate the presentmethodology of checking LVRT compliance in vogue for giving clearancefor integration and update the status of LVRT compliance.
The group noted the same.
Item no.5 Voltage regulation by RES
As per section 16.4 of the CEA's Manual on transmission planning criteria,
"The wind and solar farms shall maintain a power factor of 0.98 (absorbing) at
their grid interconnection point for all dispatch scenarios by providing
adequate reactive compensation".
In addition to the above, the manual on transmission planning criteria states
that there shall be no reactive power flow UP through 400/220 kV, 400/132
kV, 220/132 kV, 220/66 kV whenever voltage on HV side of such ICT is more
than 1.025 per unit.
Severe high voltage is observed at various locations in WR grid particularly
when the injection from RES is high.
At the interstate level there is a mechanism for voltage dependent reactive
energy settlement. Reactive charges are payable for MVAR injection at voltage >
103% of nominal. Similarly Reactive charges are payable for MVAR drawal at
voltage < 97% of nominal at the interface point.
SLDC Maharashtra, Madhya Pradesh and Gujarat may apprise OCCregarding the following
Tariff structure for Reactive Energy exchange by RES in their States
Constraints if any for utilizing the available capability of RES for
voltage regulation.
Discussions:
During the presentation, WRLDC showed the voltage profile of 400/220 kV
Karad (Maharashtra) substation vis-à-vis RES generation in Maharashtra. It
was explained that with high injection from RES the net load in the Karad and
Kolhapur area reduces significantly and cause flow of Active and Reactive
power from LV side to HV side of the ICTs. This was causing further increase in
the voltage at the EHV level. WRLDC said that above scenario was contrary to
the provision of the CEA manual on transmission planning criteria states that
“the wind and solar farms shall maintain a power factor of 0.98 (absorbing) at
their grid interconnection point for all dispatch scenarios by providing
adequate reactive compensation and there shall be no reactive power flow up
through 400/220 kV, 400/132 kV, 220/132 kV, 220/66 kV whenever voltage
on HV side of such ICT is more than 1.025 per unit. RES developers were
requested to explain whether the Wind turbines could absorb reactive power
from the grid and support in controlling the high voltage.
Representative from Suzlon explained that the DFIG(doubly-fed induction
generator) wind turbines are capable of absorbing reactive power from the grid
and can support in controlling the high voltage but as per the prevailing tariff
the RES were liable to pay charges to the discoms for reactive energy drawal at
the interconnection point. He shared the applicable rate for reactive charges as
under:
Maharashtra: @10 paise per kVArh upto 10% of net active energy
exported and @ 25paise per kVArh above 10% of net active energy
exported.
Gujarat: @10 paise / kVArhupto 10% of net active energy exported and @
50 paise / kVArh above 10% of net active energy exported
Madhya Pradesh: @27 paise / kVArh
Rajasthan: @5.75 paise /kVArh w.e.f. 01.04.2009 escalated @ 0.25 paise
per year
Andhra Pradesh: @25paise/kVArh up to 10% and 50 paise/ kVArh above
10% of net active energy exported.
Karnataka: @40 paise / kVArh
Tamil Nadu: @25 Ps./kVArh up to 10% and 50 ps/ kVArh above 10% of
net active energy exported.
The matter was deliberated and it was opined that it might be better if the
reactive charges are made voltage dependent in line with the ISTS reactive
energy settlement instead linking it to power factor. This would be helpful in
reducing the expenditure on reactive shunt compensation at the LT as well as
EHV level.
It was decided that the above suggestion could be forwarded to SERCs, CEA
and CERC.
The group noted the same.
Item no.6 Forecasting
Though Renewable Energy Sources are variable in nature, it could be forecastedwith fair accuracy as it is being done in many renewable rich countries. Forsystem operator , the error shall be as minimum as possible. High qualityforecasting and confidence in the forecast are necessary to aid management ofbalancing energy from conventional plants. Considering high penetrations ofWind generation is gradually increased energy in May to September forecasting ofRE generation is utmost important for smooth and reliable system operations.
As per IEGC 5.3(g)
“The SLDC shall take into account the Wind Energy forecasting to meet theactive and reactive power requirement.”
And IEGC 6.5.23(ii)
Quote
“(ii) Forecasting shall be done by wind and solar generators which are regionalentities as well as the concerned RLDC. The concerned RLDC may engageforecasting agency(ies) and prepare a schedule for such generating stations.The forecast by the concerned RLDC shall be with the objective of ensuringsecure grid operation. The forecast by the wind and solar generator shall begenerator centric. The wind and solar generators which are regional entitieswill have the option of accepting the concerned RLDC’s forecast for preparingits schedule or provide the concerned RLDC with a schedule based on its ownforecast. Any commercial impact on account of deviation from schedule basedon the forecast chosen by the wind and solar generator shall be borne by it.”Unquote
Wind and Solar Generation forecasting & its real time monitoring are importanttools to address variability & uncertainty aspect of its grid integration. State-of-the-art forecasting helps grid operator to manage power system balance foreconomic, reliable & secured operation of the grid even in high RE penetrationregime.
In 1st meeting of REIF, the importance of forecasting were discussed and agreedby one and all. WRLDC agreed to take up a Pilot Project for this wind peakseason to forecast Maharashtra state by using the pooling station level databased on the longitude, latitude, blade dimension and other turbine
parameters. WRLDC have provided the data format and it was agreed thatrequired data will be furnished by wind developers in the prescribed format .
Status of Wind forecast for Maharashtra
WRLDC has entered into an MoU with Manikaran Analytics Ltd. (Forecast
Service Provider) for executing a pilot project to forecast RES generation located
in Maharashtra for six-months. During the last meeting of REIF it was agreed
that turbine level static data and real-time data required for forecasting shall
be made available by the RES developers.
The WTG details has been provided by Suzlon, ReNew, Panama and Orange.
The WTG level real-time parameters for Wind forecast has been provided for
few of the sites at Vaspet4, Jath, Mirkala, Palsi, Valsang and Welturi. Thus the
aggregate Wind forecast is now available at WRLDC for 274 WTGs amounting
to 452 MW capacity in Maharashtra.
Suzlon may expedite resolution of the discrepancies in the WTG details and
also provide real-time data so that the forecast of Suzlon turbines could also be
aggregated in the State level forecast. Other Wind developers also to expedite
sharing of WTG details and provide the real-time data. Once the model is
complete the aggregate State level forecast of Wind RE shall be shared with all
stakeholders.
Summary
Type ofAsset Location
Capacityavailable
(MW)ClientName Static detail SCADA
availability
Wind
Welturi 73.5 RenewPower Received Yes
Jath 84.6 RenewPower Received Yes
Valsang
94.5 RenewPower Received Yes
45 ReliancePower Received No
Vaspet 4 49.5 RenewPower Received Yes
Palsi 70.4 Panama Received Yes
Mirkala 80 Panama Received No
Agaswadi Tata Not Received Yes
Khanpur Orange Not Received Yes
Suzlon32 sites 2100 Suzlon Received No
Status of Solar forecast for Maharashtra
For Solar generation forecast a six-month pilot project has been taken up by
WRLDC with Manikaran Analytics for Sakri project of Mahagenco. The
modeling is complete. Forecast as well as real-time Sakri data is available at
WRLDC.
Type ofAsset Location
Capacityavailable
(MW)
ClientName
Staticdetail
SCADAavailability
Solar Sakri 125MAHAGENCO
Received
Yes
Other Solar developers also may share the details and real-time data for having
an aggregate forecast at the State level.
Gujarat and Madhya Pradesh are requested to intimate the forum regarding
the forecast of wind and solar generation for their state.
Issues being faced by RE generators. All Renewable generators solar and
Wind are requested to discuss in details all the issues being faced by them on
Telemetry ,Forecasting or any other issues .
Discussions:CE SLDC, Gujarat informed that RE forecast in Gujarat is being done by RE
Connect Energy Solutions Pvt. Ltd. and is fairly good. For high wind scenario,
the accuracy level achieved is 70-80% and for low wind scenario, the accuracy
achieved is approximately 50%.
WRLDC stated that the RES forecast was being received from SLDC Gujarat in
day-ahead as well as in intra-day while the forecast for RES in Madhya
Pradesh was received only in day-ahead.
WRLDC shared that a MoU with Manikaran Analytics Ltd. had been signed for
a pilot project on forecast of RES in Maharashtra for six months. It was
mentioned that as on date only 50 % of the RES capacity could be covered
under the pilot project as the static data and dynamic data was still awaited
from a large number of RES in Maharashtra. The issues regarding actual
injection data through FTP was also highlighted. The status was appraised as
under:
SrNo.
RES TotalInstalledCapacity(MW)
TotalForecastedCapacity(MW)
Remarks
WRLDC informed that the data provided over FTP by developers is received
with a time delay in range of 10-15 minutes and is intermittent in nature. The
accuracy of the forecasting highly depends on availability of real time data and
continuity of data. RLDC requested SLDC, Maharashtra and all wind
developers to take necessary action to provide real time data for realistic
forecasting.
The group noted the same.
ITEM NO 7. AGENDA FROM GUJARAT
Chief Engineer, SLDC Gujarat vide mail dated 21.05.2017 requested for
discussion of following points:
Declaration and scheduling of all RE generators All the renewable generators should have to comply with CEA (Technical
standard for connectivity to the grid) regulation 2007 and its
amendment.
SN RE InstalledCapacity
(MW)
Covered byFTP
(MW)
Remark
1 Wind 4769 2470 Real Time Data: At Present, delayed active power data of2806 MW is available over FTP. Real time data of all sitesrequired for accurate forecasting. Real time data of Vestas,Windworld. Kenersys, Sri Maruti not available
Static Data: Static data of Vestas, Windworld. Kenersys, SriMarutiyet to be furnished by the developers
2 Solar 376 125 Real time active power is available for 230 MW. Real time dataof remaining capacity of 146 MW is to be provided by SLDC.
Real Time weather parameters is to be provided for all solarparks.
Sharing of static and real time generation and weather data for better
forecast
Chief Engineer, SLDC Gujarat requested to RE developers to comply the above
points.
The group noted the same.
ITEM NO 8. ANY OTHER ITEMS
Addl Item No 1: INTRODUCTION OF WIND/SOLAR GENERATORS
The domain of renewable energy operates with multiple agencies viz. REdevelopers, RE generation owners, STU, SLDCs, RLDC and Regional PowerCommittee (RPC). The integration of RE in the grids thus demands a platformwhere exchange of information and ideas can take place with determinedobjectivity of fully utilizing the installed RE capacity with security of the grid.
Solar and Wind generators are new members of National Grid and they are tobe very familiar with all other entities. In this context all solar and windgenerators are requested to give a small presentation with details of theirgenerating plants in the States of Western Region. The information of REshall also to be submitted as per format attached at Annexure –1.
All RE Developers are requested to submitted introductory information ofindividual developers in format attached at Annexure –1
The group noted the same.
Addl Item no. A-2 : Integration of new RES connected to ISTS:
Status of RES for connectivity to ISTS: The following ISTS connecting RESare to be commissioned in near future. The members please update the statusof commissioning of the wind/solar parks.
Sl.No.
Organization Name GeneratingStationLocation
Capacity
Seekingconnectivity(MW)
Date fromconnectivity reqd
Grantedconnectivityfor
TentativeCommissioningdate
1 WIND WORLD (INDIA)LTD MUMBAI
Bhuj 500 500 31-Mar-17 500
2 INOX WINDINFRASTRUCTURESERVICES LIMITED
KACHCHH
500 500 30-Jul-17 500
3 Kachchh 500 500 01-Jul-17 500
4 GAMESA RENEWABLEPVT LTD
Bhuj 100 100 31-Mar-17 100
5 DHAR 218 218 31-Mar-17 Accepted andunder process
6 KP ENERGY LIMITED Kutch 400 400 25-May-17 Accepted andunder process
7 Kutch 400 400 25-May-17 Accepted andunder process
8 Kutch 400 400 25-May-17 Awaiting forAcceptance
9 Kutch 400 400 25-May-17 Awaiting forAcceptance
10 GUJARAT POWERCORPORATION LIMITED
BANASKANTHA
700 700 31-Dec-17 700
11 RENEW POWERVENTURES PRIVATELIMITED
Kutch 400 400 15-Dec-17 400
12 REWA ULTRA MEGASOLAR LIMITED
Rewa 500 750 31-Mar-17 750
13 KADAPA WIND FARMSPRIVATE LIMITED
BHUJ 100 100 31-Mar-17 Accepted andunder process
14 SRI MARUTI WINDPARK (MENDIGIRI)PRIVATE LIMITED
KucthDistrict
400 400 20-Jun-17 Awaiting forAcceptance
WRLDC shared that several pooling stations and transmission schemes were
under implementation under the Green Energy Corridor and requested the
developers to share the progress of the RES projects so that the development of
transmission projects could be matched with the RES projects. The developers
were also advised to refer the CERC regulations for connectivity and first time
charging for smooth integration of upcoming RES at ISTS level.
WRLDC informed that Hon’ble CERC hadapproved the “ Procedure for
Implementation of Framework on Forecasting, Scheduling and imbalance
Handling for Renewable Energy Generating Stations including Power Parks
based on Wind and Solar at Inter State Level andthe same was available on
CERC website at http://www.cercind.gov.in/2017/regulation/pro.pdf
It was also informed that all new RES intending to get connected at ISTS shallsubmit data in prescribed formats to WRLDC for First Time Charging (FTC), asapproved by CERC in above procedure.
It is requested to all RE developers shall submit the requisite documentsin advance as per approved procedure for connectivity to ISTS.
ITEM NO 9 DATE & VENUE OF NEXT MEETING
****************************
Annexure-I
Format for Wind Generators
State- Maharashtra/Gujarat/Madhya Pradesh
Sr. Particulars Applicant's Details
No.
1 Name of theGenerating Company
2 Address of theGenerating Company
Name :
Designation :
Address :
3Nodal Officer's Name & contact Contact Details :
Details Office No :
Fax No. :
Mobile No :
Email ID :
Location of the Generating Station
5 Total Installed Capacity
6 Connectivity /Voltage Level
7 Turbine Type & Specification
8 Optimal/Rated Wind Speedfor Turbine
9 Maximum/Minimum WindSpeed of Turbine
10 Maximum Power that canbe Generated by WindTurbine
18 Any other information useful for assisting efficient Grid Operation
Signature of the Authorized
Officer
Note- Please submit the details state-wise. A Generating station having location say both inMaharashtra & Gujarat to submit two separate forms.
Format for Solar Generators
State- Maharashtra/Gujarat/Madhya Pradesh
Sr.
Particulars Applicant's DetailsNo.
1 Name of theGenerating Company
2 Address of theGenerating Company
Name :
Designation :
Address :
3Nodal Officer's Name & contact Contact Details :
Details Office No :
Fax No. :
Mobile No :
Email ID :
4 Location of theGenerating Station
5 Total Installed Capacity
6 Connectivity /Voltage Level
7 Module type (Thinfilm/ polycrystalline)
8 Longitude
9 Latitude
10 Any other information useful forassisting efficient Grid Operation
Signature of the Authorized
Officer
Note- Please submit the details state-wise. A Generating station having location say both inMaharashtra & Gujarat to submit two separate forms.
01/09/2017
1
Welcome to participants in2nd Meeting of
Renewable Energy IntegrationForum(REIF) of Western Region
Outline of the Presentation:1. General Overview of Renewable Energy Sources in Western Region.2. Telemetry Requirements/issues.3. Low Voltage Ride Through (LVRT) requirement and issues.4. Forecasting of Wind RES in Western Region.5. Voltage Regulation by RES6. Integration of new ISTS connected RES
Type Wise Capacity
Total InstalledCapacity – 330 GW Renewable:
58 GWPeak Demand met:
160 GW
Indian Power Scenario
Coal, 194433, 59%
Gas, 25185, 8%
Diesel, 838, 0%Nuclear, 6780, 2%
Hydro, 44614, 14%
Wind, 32508, 10%
Solar, 13114, 4%
Bio power, 8296, 2%
Small Hydro, 4385, 1%
RES, 58303, [PERCENTAGE]
Fuel wise Installed capacity (as on 31.07.2017)
Coal Gas Diesel Nuclear Hydro
Wind Solar Bio power Small Hydro
Type Wise Capacity
Total InstalledCapacity – 109 GW
Wind-RE12602 MW
Peak Demand met:51 GW
Western Region Power Scenario
Peak Energy Met1180 MUs
Max Wind Gen.7885 MW
Max Gen – 58786 MW
Max Wind EnergyGen: 169 MUs
Solar-RE2697 MW
Max Solar Gen.1818 MW
Max Solar EnergyGen: 18 MUs
Max RE (Wind+Solar)Gen. 9031 MW
Coal, 70164, 64%
Gas, 11059, 10%
Diesel, 0, 0%
Nuclear, 1840, 2%
Hydro, 7448, 7%
Wind, 12545, 12%
Solar, 2531, 2%
Hydro/Bio, 3336, 3%Other, 18412, 17%
Western Region Fuel wise Installed capacity (as on 31.07.2017)
Coal Gas Diesel NuclearHydro Wind Solar Hydro/Bio
01/09/2017
2
Wind Power Capacity in WR (in MW)
ConstituentsAs on 31.07.2017
(A)Target by Year 2022
(B)Balance (C=B-A)
Gujarat 5405 8800 3395
Maharashtra 4769 7600 2831
Madhya Pradesh 2428 6200 3772
Total 12602 22600 9998
Wind Generation Targets by 2022 in Western Region:
Average WRWind Gen inJuly’17 - 114
Mus
Highest Wind generationState Gen (in MW) Date Time Demand (in MW) on
Max Wind Gen day Penetration (%)
Gujarat 3763 05.07.2017 18:00 10720 35.1
MP 1779 25.07.2017 16:00 5124 34.7
Maharashtra 3002 24.07.2017 12:00 16607 18.1
WR 7885 04.07.2017 11:00 37722 20.9
Full day total WRWind > 6000 MW
Growth in MaxWind Generation(MW) : 22.5%
Max Wind Gen- 169 Mus on25.07.17
Guj- 67 MusMah- 63 MusMP- 39 Mus
Growth in Max WindGeneration (MUs) : 20.7%
01/09/2017
3
WR Wind Generation Jan’17-June’17
Days
June’17
HoursJan’17
Installed Capacity-12545 MWHighest Ever Generation - 7885 MW on 4th July’17CUF -63%
Jul
RES GRID INTEGRATION Requirements for SECURE GridIntegration of RES :
1.Availability of Telemetry: Data visibility of RES atSLDC/WRLDC
2.Low Voltage Ride Through (LVRT)3.Forecasting and Scheduling4.Voltage Regulation by RES
01/09/2017
4
Telemetry Issues IEGC Clauses for Telemetryfor RES
Special requirements for Solar/ wind generators
IEGC Regulation 5.2 (u)• System operator (SLDC/ RLDC) shall make all efforts to evacuate the
available solar and wind power and treat as a must-run station.However, System operator may instruct the solar /wind generator toback down generation on consideration of grid security or safety ofany equipment or personnel is endangered and Solar/ wind generatorshall comply with the same. For this, Data Acquisition System facilityshall be provided for transfer of information to concerned SLDC andRLDC.
• (i) SLDC/RLDC may direct a wind farm to curtail its VAr drawl/injection in casethe security of grid or safety of any equipment or personnel is endangered.
• (ii) During the wind generator start-up, the wind generator shall ensure thatthe reactive power drawl (inrush currents in case of induction generators)shall not affect the grid performance. "
IEGC Regulation 6.2
• This code also provides the methodology for re-scheduling of windand solar energy generators which are regional entities, on one andhalf hourly basis and the methodology of handling deviations of suchwind and solar energy generators. Appropriate meters shall beprovided for accounting of charges for deviation under DSMRegulations. Telemetry/communication system & Data AcquisitionSystem shall also be provided for transfer of information to theconcerned SLDC and RLDC.”
01/09/2017
5
Telemetry of Wind RES in WR• WR Wind RES Installed
Capacity• Wind: 15545 MW
• Visibility/Observability ofWind RES at WRLDC:83.88%
• Maharashtra Wind RESvisibility at WRLDC:58.86%(over FTP)
• Real time visibility ofMasharashtra RES onreliable communicationto be expedited.
State/Region InstalledCapacity Telemetered
% ofVisibility/Obser
vability atSLDC/WRLDC
Gujarat 5348 5339 99.83
Maharashtra 4769 2806 58.86
Madhya Pradesh 2428 2378 97.94
Chhattisgarh 0 0 -
Daman & Diu 0 0 -
DNH 0 0 -
WR 12545 10523 83.88
MAH FTP
MAH FTP
01/09/2017
6
Telemetry of Solar RES in WR• WR Solar RES Installed
Capacity• Wind: 2531 MW
• Visibility/Observability ofSolar RES at WRLDC:93.16%
• Maharashtra Solar RESvisibility at WRLDC:61.17%.
State/Region InstalledCapacity
TelemeteredCapacity
% ofVisibility/Obser
vability atSLDC/WRLDC
Gujarat 1230 1227 99.75
Maharashtra 376 230 61.17
Madhya Pradesh 835 835 100
Chhattisgarh 76 66 86.84
Daman & Diu 10 0 0
DNH 4.1 0 0
WR 2531.1 2358 93.16
Maharashtra Wind RES Telemetry Status
Following developer/IPPS have provided FTP data to RLDC/SLDC.
• Suzlon: 1663 MW• Panama: 72 MW• Regen: 507 MW• Gamesa: 247 MW• Reliance Global: 45 MW• Continuum: 80 MW• Inox Wind: 192 MWTotal 2806 MW
Maharashtra Wind RES Telemetry Status
No FTP data has been received from the following wind developers.• Senvion/Kenersys• Maruti Wind• Windword/Enercon• TS Wind• Vestas Wind
• Total visibility of Maharastra wind RES over ftp at WRLDC is 58.83%.
COMPLIANCE OF CEA STANDARDSW.R.T TO LOW VOLTAGE RIDETHROUGH CAPABILITY (LVRT)
01/09/2017
7
Regulation Part II (B2) (3) of the CEA (TechnicalStandards for Connectivity to the Grid)
• Notified on 15th October 2013 mandates asunder:
• “B2. For generating station getting connected on orafter completion of 6 months from date ofpublication of these Regulations in the OfficialGazette.….
• (3) Wind generating stations connected at voltagelevel of 66 kV and above shall remain connected tothe grid when the voltage at the interconnectionpoint on any or all phases dips upto the levelsdepicted by the thick lines in the curve
CERC Order on LVRT
• Hon’ble Central Electricity Regulatory Commission vide its orderdated 05.01.16 in Petition No.420/MP/2014 mandated that
• “………We are of the view that LVRT should be implemented for allwind turbines commissioned before 15.4.2014 and connected tovoltage level of 66 kV and above except for Stall Type WTGs, whichare not technically feasible to be retrofitted with LVRT. However,keeping in view the suggestions of IWTMA, we are of the view thatpresently LVRT should be implemented for all wind turbines (exceptStall Types) commissioned before 15.04.2014 having installedcapacity equal to or more than 500 KW.”
LVRT Status Western Region:Constituent Total
Installed WindPowerCapacity (MW)
ExemptedCapacity (MW)
Informationreceived for(MW)
LVRT Complied capacityout of informationreceived (MW)
Gujarat
5348
NotAvailable
2617 471
Madhyapradesh2428
NotAvailable
1205 1205
Maharashtra
4769
NotAvailable
Nil Nil
Location Developer PoolingStation
Turbinemake
Turbinetype
TurbineCapacity
If turbinecommissioned before15.04.2014, Expecteddate of completion ofretrofitting
If turbinecommissionedafter 15.04.2014whethercompliant to LVRT(Yes/No)
… … … … … … … …… … … … … … … …
Format for Information of Wind Turbines andLVRT compliance
01/09/2017
8
FORECASTING OFRENEWABLE ENERGY
INWESTERN REGION
IEGC Clauses for Forecasting of RES
• As per IEGC 5.3(g)“The SLDC shall take into account the Wind Energy forecasting to meet the active and reactivepower requirement.”
And as per IEGC 6.5.23(ii)Forecasting shall be done by wind and solar generators which are regional entities as well as the
concerned RLDC. The concerned RLDC may engage forecasting agency(ies) and prepare a schedulefor such generating stations. The forecast by the concerned RLDC shall be with the objective ofensuring secure grid operation. The forecast by the wind and solar generator shall be generatorcentric. The wind and solar generators which are regional entities will have the option of acceptingthe concerned RLDC’s forecast for preparing its schedule or provide the concerned RLDC with aschedule based on its own forecast. Any commercial impact on account of deviation from schedulebased on the forecast chosen by the wind and solar generator shall be borne by it.”
VARIABILITY OF RES GENERATION:
• Over Drawl of MP of~900 MW
• Frequency: ~49.7 Hz• Forecasting is required :
• To schedule RES as perforecasting
• To fine tune schedules asper real time forecasting
• Prevent systemcontingencies due tosudden withdrawal ofwind
• Plan power generation tomeet the demand
VARIABILITY OF WIND GENERATION:• For real time Grid Operation it is
must to have• Real-time telemetry from RES in
the State• Forecast of RES and demand by the
SLDCs
Reduction of WR Wind from 6000 MW to 3000 MW
01/09/2017
9
Status of Forecasting of RES in Western Region:
State/Region Status of ForecastingGujarat Wind Forecasting is done and shared with WRLDC
Maharashtra Not DoneMadhya Pradesh Not Done
Chhattisgarh Not DoneDaman & Diu Not Done
DNH Not Done
WRLDCPilot Project for forecasting of Maharashtra RESundertaken and is being done for around 50% ofinstalled capacity based on data received over FTP.
Status of Availability of data for MaharashraRES Forecasting Pilot Project
Sr No. RES TotalInstalledCapacity(MW)
TotalForecastedCapacity (MW)
Remarks
1 Wind 4769 2470 Real Time Data: At Present, delayed active powerdata of 2806 MW is available over FTP. Real timedata of all sites required for accurate forecasting.Real time data of Vestas, Windworld. Kenersys,Sri Maruti not provided.Static Data: Static data of Vestas, Windworld.Kenersys, Sri Maruti not provided.
2 Solar 376 125 Real time active power is available for 230 MW.Real time data of remaining capacity of 146 MWis to be provided by SLDC.Real Time weather parameters is to be providedfor all solar parks.
Voltage Regulation by RES:
• Most of the wind RES are connected on lower voltage level the grid. Duringthe high wind season, the demand at lower voltage level is being met bywind RES resulting high voltages on many nodes of south Maharashtra andMadhyapradesh.
• The capability of reactive power drawl/injection by wind RES can beharnessed to support the grid for Voltage Management.
390
395
400
405
410
415
420
425
430
435
0
200
400
600
800
1000
1200
1400
1600
1800
11.0
8.17
11.0
8.17
11.0
8.17
11.0
8.17
11.0
8.17
12.0
8.17
12.0
8.17
12.0
8.17
12.0
8.17
12.0
8.17
13.0
8.17
13.0
8.17
13.0
8.17
13.0
8.17
13.0
8.17
14.0
8.17
14.0
8.17
14.0
8.17
14.0
8.17
14.0
8.17
15.0
8.17
15.0
8.17
15.0
8.17
15.0
8.17
16.0
8.17
16.0
8.17
16.0
8.17
16.0
8.17
16.0
8.17
17.0
8.17
17.0
8.17
17.0
8.17
17.0
8.17
17.0
8.17
Volta
ge a
t Kar
ad 4
00 k
V Bu
s
Win
d Ge
nera
tion
MW
Date
Karad Substation Voltage Variation Vs Wind Generation
Wind Generation (MW) Voltage
High Voltage Scenerio isobserved atsub-station situated inareas with high density ofwind farms .Voltage remained above420 KV for 60-70% of thetime at Karad and Dhulesub-station.As the wind generationpicks up during high windseason, overvoltagescenario observed in thesub-stations.Reactive powerinjection/drawl capabilityof wind turbines can beused for voltagemanagement in suchscenarios.
01/09/2017
10
INTEGRATION OF NEW ISTSCONNECTED RENEWABLE
ENERGY SOURCES
NEW RES YET TO BE CONNECTED TO ISTSSl.No. Organization Name Generating
Station Location Capacity in MW Date from connectivityreqd Granted connectivity for
1 WIND WORLD (INDIA) LTD MUMBAI Bhuj 500 31-Mar-17 500
2 INOX WIND INFRASTRUCTURE SERVICESLIMITED
KACHCHH 500 30-Jul-17 500
3 Kachchh 500 01-Jul-17 5004
GAMESA RENEWABLE PVT LTDBhuj 100 31-Mar-17 100
5 DHAR 218 31-Mar-17 Accepted and under process6
KP ENERGY LIMITED
Kutch 400 25-May-17 Accepted and under process7 Kutch 400 25-May-17 Accepted and under process
8 Kutch 400 25-May-17 Awaiting for Acceptance
9 Kutch 400 25-May-17 Awaiting for Acceptance
10 GUJARAT POWER CORPORATION LIMITED BANASKANTHA 700 31-Dec-17 700
11 RENEW POWER VENTURES PRIVATELIMITED Kutch 400 15-Dec-17 400
12 REWA ULTRA MEGA SOLAR LIMITED Rewa 500 31-Mar-17 750
13 KADAPA WIND FARMS PRIVATE LIMITED BHUJ 100 31-Mar-17 Accepted and under process
14 SRI MARUTI WIND PARK (MENDIGIRI)PRIVATE LIMITED Kucth District 400 20-Jun-17 Awaiting for Acceptance
Total Capacity to be connected byDec.’17 5518
Procedure for Connectivity:
• Hon’ble CERC have issued “ Procedure for Implementation ofFramework on Forecasting, Scheduling and imbalance Handling forRenewable Energy Generating Stations including Power Parks basedon Wind and Solar at Inter State Level.”
• The same is available on CERC website athttp://www.cercind.gov.in/2017/regulation/pro.pdf
• All new ISTS connecting RES shall submit data in prescribed formatsto WRLDC for First Time Charging (FTC), as approved by CERC inabove procedure.
Data requisite for Grid Connectivity:
• For First Time Charging (FTC), following data shall be submitted to WRLDC for ISTSconnecting RES.
For Wind RES:1. Static data of the wind turbines and wind parks as mentioned in framework ( covers 70
points including details of turbine, blade, generator, transformer, performanceparameters etc.)
2. First Time Charging Formats A to C ( includes details of T/L, transformer, bays, SLD,communication conformity, energy meter conformity etc.)
3. Undertaking by RE/Lead/Principal regarding discharging all operational andcommercial responsibilities on behalf of generating stations as per the prevalent CERCRegulations.
4. Copy of application for connectivity which was submitted to CTU.5. Undertaking to indemnify, defend and save the SLDCs/RLDCs harmless from any and
all damages, losses including commercial losses.
01/09/2017
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Data requisite for Grid Connectivity:
For Solar RES:1. Static data of the solar PV modules and Solar Parks as mentioned in framework
( covers 16 points including details of PV modules, Geographical information,inverter, transformer specifications etc.)
2. First Time Charging Formats A to C ( includes details of T/L, transformer, bays,SLD, communication conformity, energy meter conformity etc.)
3. Undertaking by RE/Lead/Principal regarding discharging all operational andcommercial responsibilities on behalf of generating stations as per theprevalent CERC Regulations.
4. Copy of application for connectivity which was submitted to CTU.5. Undertaking to indemnify, defend and save the SLDCs/RLDCs harmless from
any and all damages, losses including commercial losses.