Suppression of Subsynchronous Resonance

• Main Authors: Chien-HsiangYu, 尤乾祥
• Other Authors: Li Wang
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/82969404794082910854

碩士 === 國立成功大學 === 電機工程學系 === 104 === This thesis presents the suppression of subsynchronous resonance (SSR) in power systems with a steam-turbine system and a wind-turbine generation system using a static synchronous series compensator (SSSC). The first studied system uses a superconducting synchronous generator (SCSG) and a doubly-fed induction generator (DFIG)-based wind farm to replace the synchronous generator (SG) in the IEEE Second Benchmark Model, system-1. The second studied system is based on the IEEE Second Benchmark Model, system-1 joining with a DFIG-based offshore wind farm (OWF). The d-q axis equivalent-circuit model under three-phase balanced loading conditions is used to establish the complete studied systems. A proportional-integral- derivative (PID) damping controller of the SSSC is designed by using pole-assignment approach based on modal control theory. Steady-state characteristics of the studied system under different series compensation ratios, wind speed of the OWF as well as the terminal voltage, output active power, and power factor of the SG are performed. Time-domain dynamic simulations under disturbance conditions are also carried out. The results show that the proposed SSSC joined with the designed damping controller are effective to suppress the SSR of the studied power systems.