Update on development of NERC requirements for verification of generator dynamic models

Transmission and operation planners are routinely expected to perform dynamic analysis utilizing load flow and corresponding dynamic models to determine either required transmission system reinforcements and/or power system operational limits. Because the results of these analyses can result in major capital project decisions or near real time operational limits, accuracy is paramount. Therefore, it is critical that the generator excitation and turbine/governor/load control dynamic models utilized in these analyses accurately reflects the expected performance of the actual in service equipment. The North America Electric Reliability Corporation (NERC) has addressed verification of generator dynamic models in its now retired Planning Standards, and NERC is currently drafting Reliability Standards containing mandatory and enforceable Requirements for verification of these generator dynamic models. Both NERC´s treatment of verification of generator dynamic models in the retired Planning Standards, and the efforts to date to develop corresponding Reliability Standards are discussed in this paper.