INCREASING PENETRATION OF WIND ENERGY THROUGH POWER SYSTEM STABILITY IMPROVEMENTS USING SERIES STATIC SYNCHRONOUS COMPENSATORS

摘要

This research investigates the power system benefits of series synchronous static compensators (SSSC). The two main benefits investigated are power system stability enhancements and increase in power flow limits of the transmission network. The case study picked for this research was a power system with Wind Energy resources. Wind power generation sites are often located in remote low populated areas. Transmission lines in such areas were not designed to carry large amounts of power. Therefore wind energy resources are not fully utilized. This issue can be solved using SSSC. The SSSC implementation in this research includes a Battery Energy Storage System (BESS). The use energy storage in the compensator system allows the compensator system to control both power and voltage therefore controlling the line impedance and active power flow. Another issue with wind farms is the presence of Subsynchronous resonance (SSR) with series compensation either due to torsional interaction or induction generator effects. SSSC Injects voltage in the system that is independent of the line current. Therefore SSSC is not only SSR neutral, but can help mitigate SSR. A representative model is created in Matlab Simulink of a 345 kV transmission network with SSSC and Wind Generation to perform the study.