Developing a Reduced 240-Bus WECC Dynamic Model for Frequency Response Study of High Renewable Integration

Haoyu Yuan, Reetam Sen Biswas, Jin Tan, Yingchen Zhang

Research output: NRELPresentation


The ongoing changes in the generation resource mix, driven by the rapid adoption of inverter-based resources (IBR) as well as the early retirement of synchronous generators, are bringing new challenges to the planning and operation of bulk electric power systems. Consequently, there is an increasing need to understand, design, and quantify the reliability service provision from IBRs by performing integrated scheduling and dynamic simulations. However, test systems that have consistent scheduling and dynamic models rarely exist largely because of the decoupled nature of the two simulations on a synchronous generator-dominated system. This paper develops the dynamic model of a reduced Western Electricity Coordinating Council (WECC) system. In conjunction with the existing scheduling model, it is suitable for integrating scheduling and dynamic simulations. The reduced 240-bus WECC model reflects the generation resource mix of the Western Interconnection as of 2018. Moreover, the developed dynamic model is validated against field frequency events measured by FNET/GridEye and preserves the dominant inter-area oscillation mode in WECC.
Original languageAmerican English
Number of pages5
StatePublished - 2020

Publication series

NamePresented at the IEEE PES Transmission and Distribution Conference and Exposition, 12-15 October 2020, Chicago, Illinois

NREL Publication Number

  • NREL/PR-5D00-77932


  • dynamic simulation
  • generation resource mix
  • reduced WECC model
  • renewable energy


Dive into the research topics of 'Developing a Reduced 240-Bus WECC Dynamic Model for Frequency Response Study of High Renewable Integration'. Together they form a unique fingerprint.

Cite this