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为了验证静止同步补偿器(STATCOM)对电网电压的有效支撑作用,针对500kV东莞变电站±200MVA STATCOM工程项目,通过PSCAD软件仿真和现场试验对STATCOM装置的定电压控制、恒无功控制、与站内原有固定补偿器的协调控制这3项主要控制功能进行了功能试验对比研究。研究表明,STATCOM实际输出的无功电流能快速跟踪控制目标电流的变化,且PSCAD仿真与现场试验结果一致。因此证明了PSCAD模型贴近实际装置,且STATCOM的控制功能设计合理,能够对系统无功变化作出快速响应,能有效实现电压支撑作用,提高电网的输电能力,保证电网的安全稳定运行。
In order to verify the effective supporting effect of STATCOM on power grid voltage, aiming at ± 200MVA STATCOM project of Dongguan substation 500kV, through the simulation of PSCAD software and field test, the constant voltage control and constant reactive power control of STATCOM, There are three main control functions of the fixed compensator coordinated control function test comparative study. The results show that the actual output reactive current of STATCOM can quickly track the change of control target current, and the simulation of PSCAD is consistent with the field test results. Therefore, it proves that the PSCAD model is close to the actual device, and the design of STATCOM control function is reasonable. It can respond quickly to the reactive power of the system, effectively support the voltage, improve the transmission capacity of the power grid and ensure the safe and stable operation of the power grid.