Generator Data Submittals
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Transcript of Generator Data Submittals
Generator Data SubmittalsGenerator Data Submittals5/8/08
2008 Transmission Customer ForumBob Jones
Transmission PlanningSouthern Company Transmission
5/8/082008 Transmission Customer Forum
Bob JonesTransmission Planning
Southern Company Transmission
Presentation Outline• Reasons for Generator Data Submittals
• Observations from returned 2007 Generator Data Submittals
• Possible changes to 2008 Generator Data Submittals
Transition Time• NERC standards
• SERC Supplements
• Voluntary compliance
• FERC approved standards
• Mandatory compliance
• Fine for non-compliance
Reasons for Generator Data Submittals
August 14, 2003 Northeast Blackout
– Recommendation 24: Improve quality of system modeling data and data exchange practices.
• The after-the-fact models developed to simulate August 14 conditions and events found that the dynamic modeling assumptions for generators were frequently inaccurate.
SERC SupplementSystem Modeling Data RequirementsNERC Reliability Standards MOD-010through 015
SERC SupplementVerification of Generator Real and Reactive Power CapabilityNERC Reliability StandardsMOD-024 and MOD-025
Supports reliability through accurate modeling
SERC Model Data Requirements• Model Data Validation Requirements:
– A. Comparison of power flow model to state estimator snapshot
– B. Reactive load verification of power flow models– C. Validation of transformer tap settings– D. Modeling of significant system disturbances and
stressed system conditions– E. Validation of generator excitation systems– F. Validation of power system stabilizers
SERC Requirements (cont.)• Requirement C - Validation of transformer tap
settings– SERC members shall have a procedure to validate the
transformer tap settings used in power flow models by comparing to actual equipment settings (field check) at least every five (5) years.
SERC Requirements (cont.)• Requirement E - Validation of generator
excitation systems– SERC members shall validate the excitation system
model parameters of their generating units. – Each generator owner will be given a period of seven
(7) years (from February 2005) to perform open circuit step response (OCSR) tests on all of the units for which it is required.
Members must be in compliance by: February 1, 2012
SERC Requirements (cont.)• Requirement F - Validation of power system
stabilizers– SERC members shall validate the power system
stabilizer model parameters of their generating units.
SERC Generator MW and Mvar Validations
• Supplement for MOD-024 and MOD-025• Procedures for verification of gross and net real power
– Annual requirement• Procedures for verification gross and net reactive
power– To be done by January 1, 2012
SCT’s Plan for Meeting the NERC/SERC Requirements• Develop and update a generator capability
database for MW, Mvar and GSU tap verifications.
• Develop a database for generator dynamic model verifications
• Use Generator Data Submittal to confirm data that we have
2007 Generator Data Submittal• Confirm your single line is correct• Report your gross and net real and reactive power
capability• Limiting factor for reactive output?• Excitation system mode of operation, model data
available?• PSS test reports, model data available?• Confirm GSU taps and data
ssgn PPP
Pg (model)
Pss (model)
Pn (model) Pg Pss Pn
PnDate
MW MW MW MW MW MW Mo/Yr
208 208 May-07149 5.4 143.6 May-07149 3.6 145.4 May-07
Real PowerCapability
ssgn QQQ minmin
Qgmax (model)
Qgmin (model)
Qss (model)
Qnmax (model)
Qnmin (model) Qgmax Qgmin Qss Qnmax Qnmin
QnmaxDate
QnminDate
Mvar Mvar Mvar Mvar Mvar Mvar Mvar Mvar Mvar Mvar Mo/Yr Mo/Yr
140 -35 140 -35 -50 -50 11-Aug 23-Aug
130 -35 4 126 -39 120 -50 116.0 -54 22-Aug 23-Aug
130 -35 4 126 -39 120 -50 116.0 -54 23-Aug 23-Aug
Reactive Capability
Most common confusionVoltage limits at the generator bus
due to station auxiliary bus voltage limits
Qmax Qmin Qnmax Qnmin VHI VLOW
1 2 1 1 4350 V 3800 V1 2 1 1 4350V 3800V1 2 1 1 4350V 3800V
Station Auxiliary Bus Voltage Limits
ReactiveLimiting Factor
Reactive Verif.Method
Possible Additions for 2008• Exciter Model Data Verification
– Give you what model and parameters we have– Ask you to confirm if these are still valid– Ask you to supply open circuit step response test data (if
you have done this)
Excitation System Data Validation
1.02
1.00
Generator Terminal Voltage
Measurement (Green)
Simulation (Blue)
Generator Terminal Voltage
Simulation (Blue)
Measurement (Green)
Possible Additions for 2008• Underfrequency Relay Setting Coordination
– Included in Pre-Synch Data Requirements (now, hasn’t always been)
– Attach turbine underfrequency relay frequency versus time characteristic including trip and alarm setpoints.
Southern Balancing AreaGenerator UF Coordination Curve
5454.5
5555.5
5656.5
5757.5
5858.5
5959.5
60
1 10 100 1000 10000
Accumulated Time (Cycles)
Fre
qu
ency
(H
z)
Summary• Generator data submittal has been an effective way to
verify model data
• Helps improve the accuracy of our system simulations
• May add exciter model verification and underfrequency relay coordination in 2008
Call if you have any questions!
Cheryl JohnsonPhone: (205) 257-3401
Fax: (205) 257-6663Email: [email protected]