Series compensated power system may lead to a very unusual problem known as Subsynchronous Resonance (SSR). Flexible AC Transmission Systems (FACTS) controllers are widely applied to mitigate subsynchronous oscillations. The Static Synchronous Compensator (STATCOM) is a shunt device of the FACTS family using power electronics to control power flow and improve transient stability on power grids. With the advent of Wide Area Measurement (WAM) technology, it is possible to measure the states of a large interconnected power system with synchronized Phasor Measurement Units (PMU). In this paper the concept of using remote signals acquired through PMU has been proposed to damp SSR. An auxiliary subsynchronous damping controller (SSDC) for a STATCOM using the remote accelerating power of generator signal as the stabilizing signal has been designed to damp subsynchronous oscillations. The IEEE Second Benchmark (SBM) model is considered for the analysis and the complete digital simulation of the STATCOM within the power system is performed in the MATLAB/Simulink environment using the Power System Bloekset (PSB).%电力系统串联补偿可能会引起次同步谐振问题(SSR).灵活交流传输系统(FACTS)控制器广泛应用于抑制次同步振荡.静止同步无功补偿器(STATCOM)是FACTS家族的重要成员之一,用在电力系统以控制功率潮流,提高电网的暂态稳定性.随着广域测量技术的出现,大区域的互联电力系统同步相位检测(PUM)成为可能.用于STATCOM控制器的辅助次同步阻尼控制器(SSDC),采用遥测到的发电机功率加速信号作为稳定器信号,设计用于阻尼次同步振荡.基于MATLAB/Simulink环境下的PSB模块,采用IEEE第二标准模型分析和完成STATCOM数字仿真.
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