Sensitive Analysis on Electrical Parameters of Generators to Sub-synchronous Resonance

摘要

In order to improve the capacity and the stability of the transmission lines, with the large application of the series compensation techniques to the electric grid in China, the sub-synchronous resonance (SSR) which may be harmful to the generator and the electric grid, was brought forth. More accurate parameters of the generators are needed to analyze and resolve the SSR problems. In this paper, the parameters of the generator which are obtained using the load rejection method based on the time-domain simulation technology, was applied to the SSR analyses on the long-distance transmission system with the series compensation techniques. Through the eigenvalue simulation analysis, the sensitivity of the different generator parameters on the SSR problems including the torsional oscillation and the asynchronous self-excitation were studied. Moreover, the demand of the SSR problem to the parameters identification of the generator was assessed accurately, which can be beneficial to precisely identifying the generator parameters.