spwg short circuit case building and development - 2014
DESCRIPTION
SPWG SHORT CIRCUIT CASE BUILDING AND DEVELOPMENT - 2014. Qiuli Yu and Jay Teixeira ERCOT. Topics. Case Building Process for Current Year and Future Year Cases Current Year Case Process Future Year Case Process Software Requirement/Update Case Development and Achievement in 2014 - PowerPoint PPT PresentationTRANSCRIPT
SPWG SHORT CIRCUIT CASE BUILDINGAND DEVELOPMENT - 2014
July 17, 2014
Qiuli Yu and Jay Teixeira
ERCOT
2
Topics
•Case Building Process for Current Year and Future Year Cases
o Current Year Case Process
o Future Year Case Process
o Software Requirement/Update
•Case Development and Achievement in 2014
o Generator Synchronization with SSWG
o Sequence Impedance
o Grounding Impedance
o Voltage Profile
o Current Limit
• Wind Farm Modeling—WTG Equivalent Circuit
Jul 17, 2014
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Case Building Process – Current Year
• Time Span
o From Mid-December (Previous Year) to Mid-April (Current Year)
o Total 6 Passes – Pass 0, 1-4, and Final Pass
o Two Weeks for TSP to Submit Change Files
o One Week for ERCOT to Develop Short Circuit Model
• Base Case
o Future Year Final Pass created last year
o Example: 2015 CY base case = SPWG_2015_FY_UPDATED_07032014_FINAL
July 17, 2014
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Case Building Process – Future Year
• Time Span
o From Mid-April (Current Year) to Mid-July (Current Year)
o Total 6 Passes – Pass 0,1-4, and Final Pass
o One Week for TSP to Submit Change Files
o One Week for ERCOT to Develop Short Circuit Model
• Base Case
o Current Year Final Pass created in current year
o Example: 2016 FY base case = SPWG_2015_CY_UPDATED_04xx2015_FINAL
July 17, 2014
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Summary – Base Cases for CY and FY
This Year’s Base Case
Base Case to be Used for Creating the New Base CaseWhen the Base Case is Created
2015_CY SPWG_2015_FY_Updated_07032014_Final.DXT Last Year (2014)
2016_FY SPWG_2015_CY_Updated_xxxx2015_Final.DXT This Year (2015)
2017_FY SPWG_2015_CY_Updated_xxxx2015_Final.DXT This Year (2015)
2018_FY SPWG_2015_CY_Updated_xxxx2015_Final.DXT This Year (2015)
2019_FY SPWG_2015_CY_Updated_xxxx2015_Final.DXT This Year (2015)
2020_FY SPWG_2015_CY_Updated_xxxx2015_Final.DXT This Year (2015)
July 17, 2014
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Summary – Change Files for 2016-2020 FY Cases
2015 FY 2016 FY
2016 CHF
2015 FY 2017 FY
2017 CHF
2015 FY 2018 FY
2018 CHF
2015 FY 2019 FY
2019 CHF
2015 CY
2016 CHF
2016 FY
2015 CY
2017 CHF
2017 FY
Cases Built Last Year
July 17, 2014
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Software Requirement and update
• ERCOT and TSPs:o PSSE v33o ASPEN OneLiner V12.4
• ERCOT:o RARF Databaseo MODFileBuilder v33
July 17, 2014
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Case Development and Achievement in 2014
• Add generators to synchronize with SSWG caseso Grandview, PH1, PH2, WindThorst, Stephens Ranch, Spinning
Spur Wind 3, Long Horn, RenTech Project, Hereford,……o Most new gens are wind farmso Some gens with incomplete RARF data have not been modeled
• Sequence Impedance Data (P.U.)o Come from RARF submitted by REs o Some verification rules:
X”<X’<X
R0 &X0 may be 99999 for WTG
o Process: Query out from RARF database and manually copy/paste to PSSE file
Jul 17, 2014
Direct Axis Subtransient Reactance (Saturated) X"Direct Axis Transient Reactance (Saturated) X'Positive Sequence resistance R1
Positive Sequence reactance X1
Negative Sequence resistance R2
Negative Sequence reactance X2
Zero Sequence resistance R0
Zero Sequence reactance X0
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Case Development and Achievement in 2014 (continue…)
July 17, 2014
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Case Development and Achievement in 2014 (continue…)
• Voltage Profileo Voltage profile is the Vsched (pu) in the Machine Tab in
PSSE
o Come from SSWG base case (PSSE raw file)o Process: Manually copy from SSWG base case and paste into SPWG PSSE file
July 17, 2014
Bus Number Bus Name Id Area Num Area Name Code VSched (pu)1007 AAAA 1 1 XXXX 4 11031 BBBB 1 1 XXXX 4 11035 CCCC 1 1 XXXX 4 11036 DDDD 1 1 XXXX 4 11037 EEEE 1 1 XXXX 4 11038 FFFF 1 1 XXXX 1 11349 GGGG 1 901 YYYY 2 1.0141863 HHHH 1 1 XXXX 4 16034 IIII F 6 ZZZZ 2 1.0256103 JJJJ EQ 14 QQQQ 3 1.0457018 KKKK N2 7 RRRR 2 1
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Case Development and Achievement in 2014 (continue…)
July 17, 2014
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Wind Farm Modeling—WTG at Different kV
• Currently WTG are modeled at different kV levels in SPWG:
o 0.575 kV
o 0.690 kV
o 34.5 kV
July 17, 2014
IND PK D69.kV 940
BUFF_G_UNIT134.5kV 180451
BUFF_G_UNIT334.5kV 180453
BUFF_GAP_2_8138.kV 180455
BUFGGEN0A13.8kV 60092
IND PK D69.kV 940
BUFF_G_UNIT134.5kV 180451
BUFF_G_UNIT334.5kV 180453
BUFF_GAP_2_8138.kV 180455
BUFGGEN0A13.8kV 60092
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Wind Farm Modeling—WTG Equivalent Circuit (Future Work)
• Equivalent Circuit and Parameters (One Feeder):
• Individual WTG will be aggregated per feeders• Topology and Parameters – RARF• Hope to complete December of 2014, depending on RARF data
submission
July 17, 2014
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Possible Methods for WTG Equivalent Circuit Development
• Method 1 – Fault Current Simulation Using PowerWorld
July 17, 2014
Fault Current Magnitude: 1.468 p.u.Fault Current Angle: -88.98 degrees
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Possible Methods for WTG Equivalent Circuit Development
• Method 2 – Equivalent impedance calculation based on Wind Farm topology and collector system parameters
July 17, 2014
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Possible Methods for WTG Equivalent Circuit Development
• Method 3 – Use equivalent network function in PSSE/PowerWorld?
• Any Comments?
July 17, 2014
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Questions
July 17, 2014