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不平衡负载的平衡分量法分解及补偿方法

, PP. 98-104

Keywords: 电力系统,平衡分量法,静止无功补偿,不平衡电路,平衡化补偿

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Abstract:

为了更好地对三相不平衡负荷进行平衡化补偿,对不平衡负载进行详细分析,提出一种新的基于平衡分量法的无功补偿导纳计算方法。首先,将任何中性点不接地的三相负载分解为平衡负载和一个线间负载之和,通过将三相负载进行分解,可以得到负载所需要补偿的导纳值。补偿导纳的计算可分为平衡负载功率因数补偿、线间负载功率因数补偿以及线间线阻性负载平衡化补偿3部分。然后,对系统电压不对称时的Steinmetz理想补偿网络算法进行修正,根据控制目标和修正后的理想补偿网络算法,计算出系统电压不对称时所需的补偿导纳值。通过算例、仿真分析及实验验证,证明了所提无功补偿导纳计算方法的合理性和正确性,该方法具有计算简单、便于实现的优点。

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