Abstract
Subsynchronous resonance (SSR) is one of the main risk factors for ac power transmission systems with series compensation. In bulk power transmission from generator groups, the diversity of shaft torsional modes of different generators makes the SSR suppression difficult, especially for the scenario where different types of generators are concentratedly connected. In this paper, it is shown that the bypass damping filter (BDF) can be applied to suppress SSR for series-compensated system with multi-type generators. An objective optimization method for the BDF parameter tuning is proposed. This method, with clear physical meaning and application convenience, considers the torsional stability criterion of all objective generators. The SSR damping effectiveness of the BDF with the proposed method is verified in a twenty-generator series-compensated system, through time-domain simulation and torsional mode analysis. The result shows that the BDF can be an effective measure for suppressing both the torsional interaction effect and the transient torque amplification effect.
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