相控电容器式可控串补特性分析

揭示了相控电抗器式可控串补与相控电容器式可控串补的对偶特征。用对偶原理阐述了相控电容器式可控串补的性能及相控特点。分析说明了串补电容器、GTO网的电流电压峰值与串补线路电流峰值、串补电容器的工频容抗值之间的关系，这对于理论上确认相控电容器式可控串补的优越性非常重要。阐述了相控电容器式可控串补具有阻尼次同步谐振和抑制低频功率振荡的能力；相控电抗器式可控串补装置的动态性能是一个其时间常数不大于工频0．25周期的一阶惯性环节。

ANALYSIS ON THE CHARACTERISTICS OF TCSC WITH TCR MODE

This paper reveals the dual characteristic of thyristor controlled series capacitor (TCSC) with thyristor controlled reactor (TCR) mode and thyristor controlled capacitor (TCC) mode. The phase controlling performance and typical features offered by the TCSC with TCC mode are investigated. The relationship among the peak of voltage and current sustained by the GTO and series capacitor, the peak of transmission line current and the fundamental capacitance of series capacitor is established. This is very important step towards the theoretical confirmation on the advantages of TCSC with TCC mode. It is verified in the paper that TCSC with TCC mode has stronger capability of damping SSR and suppressing the power flow oscillations. Especially, the dynamic feature of TCSC TCC equipment can be simulated in one dynamic system in which the time constant is not greater than a quarter cycle of power system frequency. This project is supported by Natural Science Foundation of Yunnan Province (No. 96E145M).