Transient Stability Improvements in Wind Farms Using Power Electronic and FACTS Devices (GR-13-02)

Transient Stability Improvements in Wind Farms Using Power Electronic and FACTS Devices (GR-13-02)
Principal Investigator: Dr. Enrico Santi

The goal of this project is to investigate transient stability issues related to wind farms and how these issues can be mitigated through control. Different types of wind farms (type C and type D) will be simulated. Two cases will be considered: without and with FACTS-based series compensation. In the case of no series compensation, modal analysis and time-frequency methods will be used to find the optimal location of damping filters, of the active, passive, or hybrid type. The second case of series transmission line compensation using FACTS devices (TCSCs and GCSCs) will then be examined. Series compensation increases line loadability but introduces resonant modes that cause sub-synchronous resonance (SSR) problems. The project will investigate the design of coordinated controllers for FACTS devices and for the power electronic converters used for wind farm interface to the grid (type C and D) to damp SSR oscillations. The Time-Frequency Technique (TFT) of analysis will be used together with modal analysis to gain additional insight into system dynamics.