静止同步补偿器新型控制方法的研究

Study on New Control Method of Static Synchronous Compensator

静止同步补偿器(STATCOM)是柔性交流输电系统中的一种重要的控制器,在国内外电力系统中均已有应用实例。迄今为止的研究大部分集中在主电路结构、无功电流检测、控制策略设计等方面,而控制方式几乎都是基于等时间间隙不等高的电压调制方式,在实际应用中只能补偿基波无功电流。本文提出一种新型的调制方法应用于STATCOM,使其补偿基波无功电流的同时也能抑制部分高次谐波电流。

Static Synchronous Compensator （STATCOM） is an important controller in the flexible AC transmission system （FACTS） which has had some application examples in the power system domestic and overseas. So far, most of the research is concentrated on the aspects of the structure of the main circuit, the detection method of reactive current, the design of control strategy, and so on. However, most of the current controlling strategies are based on the principle of unequal height and equal interval voltage modulation method, which can only compensate fundamental reactive current in practice. In this dissertation, a new type of voltage modulation method is proposed and applied in STATCOM which can compensate fundamental reactive current and suppress part of harmonic as well.