demand response products. discussion points 1.setting the scene….. 2.virtual power station...
TRANSCRIPT
Demand Response Products
Discussion Points
1. Setting the scene…..
2. Virtual Power Station
3. Reserves deployment order
4. Demand Response Products
Setting the scene…..
•“SUPPLY” is what Eskom can deliver and “DEMAND” is what the consumer
needs
•ENERGY MARKET is the day-head scheduling of “Supply” options to MEET the expected “DEMAND”
=
Setting the scene…..
•RESERVE MARKET is on the day “back-up” to ensure stability of the Eskom
system/grid
=
•SUPPLY side “RESERVES”
•DEMAND side “RESERVES” – Demand Response Program
DEMAND RESPONSEPRODUCTS
Demand Response Programmes
Supplemental DR
Instantaneous DR
Self Generation DR
Normal DR
Emergency DR
Fixed Time DR
Virtual Power Station (VPS)
KZNWC CENTRALECV P S
SYSTEM OPERATOR
SUPPLY DEMAND
CC CCC C CC CCC C
x x√√
09 0010 0014 0015 00
7
Illustration of typical RESERVE deployment order
Em
erg
ency
RE
SE
RV
E M
AR
KE
TE
mer
ge
ncy
re
du
ctio
n
NR
S 0
48-9
Incr
easi
ng “
Tigh
tnes
s” o
f Sup
ply
Stage 4
Load shedding and curtailment ( Stages 1& 2 )
Curtailment ( Stage 0 )
Load shedding and curtailment ( Stage 3 )
Supplemental DR
Op
erat
ing
Automatic Gen Control (AGC)
Instantaneous DR Instantaneous
ENERGY MARKET
Interruptible LoadAgreements
Max cont. rating/Emergency Level 1
Self Generation DR (Hi Rate)
Self Generation DR (Low to Medium Rate)
Open Cycle Gas Turbines
Normal DR
Demand Response Products
Supplemental DR
Supplemental Reserves> 1 MW load ( Minimum 10% of average MW demand between 5h00-22h00 during weekdays)
Minimum 30 minute notification
Pre-recorded phone call
30 minute integration metering (MV 90 or pre-approved Meter on Line)
1 x 2 hour event per day
150 on target events per year
Reduction measured against average of previous 3 similar days (CBL)
Performance linked Capacity Payment for Standby R26.70/11.21 MW / hr
Performance linked Energy Payment for load reduction at R1250/ MWh
10
DR - Bidding and Scheduling
• Customer bid load availability by 9h00 day N-1
• VPS consolidate and offer load to System Operator
• System Operator instruct VPS to schedule or not schedule loads
• VPS informs Customer by 15h00 of standby instruction
Load Reduction and Rates
(LR)= sum [(CBL (n) – Actual Load (n)).CBL (m) – Actual Load (m))] n = first Integration Period of the Load Reduction request m = last Integration Period of the Load Reduction request
• Capacity payment
• Peak R26,70/MW (May-Aug between 6h00-09h00 & 17h00-20h00) (Sept-April between 9h00-12h00 & 18h00-21h00)
• Off-peak R11,21/MW (Including Week-ends, public holidays)
• Energy Payment –R1250/MWh
• CBL is a daily profile representing the amount of electricity the CUSTOMER would have consumed in each Integration Period for Week Days and Week-end Days
• Minimum 30 minute notification
Event Performance Report
Notification
Event duration
Customer Base Line calculation (CBL)
13
Monthly Performance Report
Median Monthly performance
Total monthly energy
Settlement Report
Emergency and Fixed Time DR
Demand Response Products (continued)
Emergency DR Fixed Time DR
Emergency Reserves Operational Reserves
When needed during emergencies Only for three Winter monthsOn the day or day ahead e-mail notification
Daily SMS reminder notification
30 minute integration metering 30 minute integration meteringNumber of events, participant’s availability dependent
One Event per day
Reduction measured against average of previous 3 similar days (CBL)
Reduction measured against previous winter weekdays profile
Performance measurement over 30 min Performance measurement over 30 min
Performance linked Energy Payment for load reduction at R1250/ MWh
Performance linked Energy Payment for load reduction at R1250/ MWh
SELF GENERATION DR
Demand Response Products (continue)
Self Generation DR
Emergency Reserves
30 minute notification
Pre-recorded phone call
30 minute integration metering
1 x 2 hour Event per day (may contract up to 4 or 6 or 16 hours per day)
100 Events per year
Generation measured against average of previous 3 similar days (CBL)Ref. point for scaling = 60 minutes before notification
Performance measurement over 30 min
Performance linked Capacity Payment for standby at: Capacity payment = R18, 75 per MW per hour scheduled
Energy Payment for self-generation up to R3000 / MWh
Self Generation
Event Performance Report
Notification
Event duration
Customer Base Line calculation (CBL)
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Monthly Performance Report
Median Monthly performance
Total monthly energy
Settlement Report
DR General
• Performance needs to be >90% of Scheduled Capacity
• Reports generated by the Virtual Power Station
• Event Performance
• Monthly Performance
• Settlement/invoice
• Settlement report to Customer by 10th work day
• Invoiced by customer by 15th work day (Original invoice )
• Electronic payment by last business day
