NERC BAL-003-1 Frequency Response Reliability Standard
Slide 2
Regulatory Landscape WECC Initial efforts to develop a
Frequency Response Standard started in early 2000s WECC FRR White
Paper was approved in 2004 Two attempts to develop a WECC FRR
Criterion failed in late 2000s NERC FERC Technical Conference on
Frequency Response in 2010 NERC Frequency Response Initiative led
to the development of NERC BAL-003-1 Frequency Response Standard
FERC approved BAL-003-1 Reliability Standard, implementation date
is April 1, 2015 2
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NERC-BAL-003-1 Reliability Standard Objectives: To require
sufficient Frequency Response from the Balancing Authority (BA) to
maintain Interconnection Frequency within predefined bounds by
arresting frequency deviations and supporting frequency until the
frequency is restored to its scheduled value To provide consistent
methods for measuring Frequency Response and determining the
Frequency Bias Setting
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Frequency Response Amount
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NERC-BAL-003-1 Reliability Standard Design Event:
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NERC-BAL-003-1 Reliability Standard FB FA FC FA =
pre-disturbance frequency (average from -16 to 0 sec) FB = settling
frequency (average from 20 to 52 sec) FC = minimum (nadir)
frequency
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NERC-BAL-003-1 Reliability Standard FA FB
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NERC-BAL-003-1 Reliability Standard Delta Frequency:
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NERC-BAL-003-1 Reliability Standard Western Interconnection
Frequency Response Obligation is 907 MW per 0.1 Hz Frequency
Response Measure is calculated by dividing the amount of resource
loss by frequency difference between points A and B
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Western Interconnection Performance Red dots frequency response
measured at point B (settling) using NERC FRM methodology Blue
diamonds frequency response is measured at point C (nadir)
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Western Interconnection Performance Red dots frequency response
measured at point B (settling) using NERC FRM methodology Blue
diamonds frequency response is measured at point C (nadir)
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Western Interconnection Performance June 14, 2014 : West Wing
event sequential loss of more than 4,000 MW in Arizona, including
simultaneous trip of three Palo Verde generators Frequency dropped
close to UFLS levels of 59.5 Hz
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Western Interconnection Performance October 8, 2002 : AC RAS
gen.drop of 2,908 MW, larger than the design event Frequency drop
to 59.6 Hz, above UFLS levels of 59.5 Hz
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Western Interconnection Performance May 30, 2013 : PDCI faults
triggered PDCI RAS gen.drop of 2,895 MW, larger than the design
event Frequency drop to 59.69 Hz, well above UFLS levels of 59.5
Hz
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Western Interconnection Performance May 26, 2014 : PDCI
Converter 1 failure triggered PDCI RAS gen.drop of 2,826 MW, larger
than the design event Frequency drop to 59.66 Hz, well above UFLS
levels of 59.5 Hz
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Frequency Response Analysis Tool (FRAT) Developed under BPA
guidance by PNNL Development is co-funded by US DOE and BPA
Received high reviews from NERC Resource Subcommittee Presented at
CIGRE and IEEE conferences 16 Database of events going back to 2008
Baselining frequency response for interconnection and BA Compliance
reporting
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BA Frequency Response Measure Calculation BA FRM = (PINT_B
PINT_A + BA GEN LOSS) / ( FA FB) FA FB PINT_A PINT_B FC 17
Slide 18
BPA Balancing Authority Performance BPA BA FRO is about 81 MW
per 0.1 Hz, BPA BA performance is about 290 MW per 0.1 Hz 18