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为了在1 000 kV特高压输电线路或有较大额定电流的750 kV输电线路上加装可控串补(thyristor controlledseries compensation,TCSC),解决目前TCSC中所需晶闸管阀通流能力不足的问题,提出了一种基于双阀控电抗器(thyristor controlled reactance,TCR)支路并联的TCSC实现方案,并对其控制策略进行了研究。通过对幅值相等控制策略下双TCR支路TCSC进行数学建模,设计了相应的阻抗控制环节和幅值相等控制环节,实现了相应的控制目标。仿真结果表明,提出的TCSC实现方案及其控制策略可行,适用于工程应用。
In order to install thyristor controlled series compensation (TCSC) on 1 000 kV UHV transmission line or 750 kV transmission line with larger rated current, and to solve the problem of insufficient flow capacity of thyristor valve required in TCSC at present, A TCSC scheme based on shunt thyristor reactance (TCR) branch is proposed and its control strategy is studied. Through mathematical modeling of double TCR branch TCSC under the equal amplitude control strategy, corresponding impedance control links and equal amplitude control links are designed, and corresponding control targets are achieved. The simulation results show that the proposed TCSC implementation scheme and its control strategy are feasible and suitable for engineering application.