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| Parameter Optimization of PSS of Parallel Configuration Used to Damp Subsynchronous Resonance |
| Jiang Ping1, Wang Guanyi1, 2 |
| 1. Southeast University Nanjing 210096 China 2. Suzhou Electric Power Corporation Suzhou 215004 China |
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Abstract The problems of subsynchronous resonance (SSR) damping by single-channels power system stabilizer (PSS) and PSS of parallel configuration are analyzed based on the IEEE SSR first benchmark model and the IEEE ST1A excitation system by means of test signal method. The method of computing the ideal phase compensation characteristic provided by PSS is formed based on the phase lags caused by excitation system and the vector relation of rotate speed bias, electromagnetic power bias and electromagnetic torque bias. The parameters of PSS of parallel configuration are optimized by means of genetic algorithms after the ideal compensation phases being computed at the frequencies which are representative in the low frequency range or near the points of SSR frequencies. With the optimized parameters, simulation and analysis are operated. The results show that the actual compensation phases are closer to the ideal compensation phases at entire frequency range with the optimized parameters of PSS of parallel configuration, and better electrical damping characteristic at entire frequency range are obtained, which is the result of that the possibility of subsynchronous resonance and low frequency oscillation is reduced to the least.
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Received: 10 April 2009
Published: 17 February 2014
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2009, Vol. 24 
