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电网技术  2010 

计及谐波抑制的不对称负荷动态无功补偿方法

, PP. 70-74

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Abstract:

为了解决固定电容器–晶闸管控制电抗器(fixedcapacitor&thyristorcontrolledreactor,FC-TCR)型静止无功补偿装置(staticvarcompensators,SVC)进行不对称负荷动态无功补偿时产生谐波较大的问题,结合周期函数空间的通用功率定义及功率平衡理论,提出了一种计及谐波分量的扩展功率平衡法。同时在控制算法中引入一加权因子,以加权二次型作为目标函数,计算TCR的补偿角度,以达到在基波无功补偿范围内控制注入电网谐波的目的。最后对单机无穷大系统进行了仿真实验。结果表明,该方法能够将基波无功补偿和谐波抑制纳入统一的指标加以考虑,有效抑制了SVC在补偿不对称负荷时向电网注入的谐波含量。

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