Frequency Response 


Frequency response is a measure of an Interconnection’s ability to stabilize frequency immediately following the sudden loss of generation or load.  The North American Electric Reliability Corporation (NERC) has filed a Reliability Standard BAL-003-1.     The Federal Energy Regulatory Commission issued a notice of proposed ruling (NOPR) on this standard and we are awaiting a final Rule.  This Reliability Standard defines the necessary amount of frequency response needed for reliable operations for each Balancing Authority within an Interconnection.

BAL-003-1 Frequency Response and Frequency Bias Setting

In the NOPR, frequency response is provided in two stages. The primary frequency control involves the automatic response of a generator, or other resource, to adjust output to dampen large changes in frequency.  The secondary frequency response is automatic generation control (AGC). AGC is produced from manual or automatic dispatch from a centralized control system. 

To prepare for and comply with BAL-003-1 MISO works to evaluate and improve generator governor performance through collaboration sessions with members, NERC and Eastern Interconnection Balancing Authorities. 

NERC Governor Survey Initiative

In 2010 generator governor and distributed control data were collected through a  NERC governor survey. Results showed that many governors and control systems set to points too low to provide frequency response for most day-to-day frequency variation.

Governor Survey

MISO collects governor setting information from its generator-owning members.

MISO Governor Survey Instructions
MISO Governor Collaboration Survey

NERC collects governor setting information from Balancing Authorities in the Eastern Interconnection.

NERC Eastern Interconnection Generator Survey
Eastern Interconnection Frequency Response Initiative White Paper

Recommended Governor Settings
Find settings consistent with those provided in the NERC Response Initiative below.

Deadband Settings

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