为解决系统电压含有2次谐波电压分量时,TCR正负半波导通电流面积不相等,向系统注入过多直流 电流分量的问题,本文提出了一种用于TCR型静止无功补偿装置,可抑制2次谐波电压影响的复合控制器,该控制器采用对TCR电流的瞬时值在每半个周期内积分求解平均值,再通过PI调节器结合系统电压的极性得出平衡调节器的控制量,控制器通过调节触发角以达到在反并联的晶 闸管桥臂正方向和负方向导通时间不同,最终将直流电流分量减少到零.仿真结果验证了该方法的准确性,表明该方法能够减少补偿器向系统注入的直流电流分量,并同时完成无功补偿功能,具有一定的理论及应用价值.%For resolving the problem of TCR, injects dc current to system due to conduction current area of TCR is not equal when system voltage contains second harmonic. This paper proposes a composite controller applying for TCR it can suppress effect of second harmonic voltage. First the controller solves the average integral value of instantaneous current during every half cycle, then it gets the control value of balance controller by PI controller with system voltage polarity, the controller reduces the dc current to zero by adjusting the positive direction and negative direction conducting time of anti-parallel thyristor is not equal. Simulation results approve that the method is correct, it can reduce dc current injected to system by TCR as the same time to complete compensating the reactive power, it has wide application prospects.
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