一种提高系统稳定性的静止同步串联补偿器控制策略

风力发电及特高压直流输电在我国得到了长足发展,大容量的风电出力波动或特高压直流闭锁后,不受控的大规模潮流转移严重威胁着电网的安全稳定运行,因此高效的潮流控制手段对提高我国电网的稳定运行水平具有十分重大的意义。文中针对电力系统潮流控制的问题,推导建立了实现线路潮流控制的静止同步串联补偿器(static synchronous series compensator,SSSC)控制策略,并搭建了其电磁暂态仿真模型;仿真结果表明,所设计的控制策略在有效控制SSSC直流电容电压的基础上,还可实现对线路潮流的精确、快速控制。文中研究成果可指导SSSC控制器设计,为大规模新能源和特高压直流输电接入后电力系统的潮流控制和稳定运行提供参考。

Control Strategy of Static Synchronous Series Compensatorto Improve Power System Stability

Wind power and UHVDC (Ultra-High Voltage Direct Current Transmission) have been widely used in China.Safety and stability of the power system are threatened by uncontrollable power flow transferring,which is caused by the fluctuation of bulk wind power or UHVDC blocking.Hence,it is of great significance for improving the stable of the power system by developing efficient power flow control devices.To solve the uncontrollable power flow transferring problem,control strategy of SSSC (Static Synchronous Series Compensator) is deduced,and electromagnetic transient model of SSSC is constructed as well.Results of the simulations show that the designed control strategy regulates the DC voltage effectively,and can control the power flow accurately and rapidly.This study is supposed to be helpful for the controller design of SSSC,and to be useful for the operating and power flow control of the power system with bulk new energy or UHVDC integrated.