Sub-synchronous interaction in Wind Power Plants- part II: An ercot case study

Abstract

This is the second part of a two-paper series. The first paper presented the tools and techniques for investigation of sub-synchronous control and torsional interaction in Wind Power Plants (WPPs). This paper presents a comprehensive Electro-Magnetic Transient (EMT) simulation based case study to investigate potential Sub-Synchronous Control Interaction (SSCI) issues. The Electric Reliability Council of Texas (ERCOT) transmission grid model is utilized for the case study. Implementation of the system and turbine side scans on the ERCOT grid model has been performed to identify conditions requiring further investigation. Detailed EMT simulations using specific turbine manufacturer models have been performed as part of further investigations. Scenarios around key aspects of the system and turbine model performance have been developed and investigated.