低压台区配电三相不平衡无功补偿方法研究

Three-phase Unbalanced Reactive Power Compensation Method for Low Voltage Substation Area Distribution

为了降低低压台区配电系统网损与电能损耗费用,优化电能质量,提出低压台区配电三相不平衡无功补偿方法。采用基于最大节约网损的补偿点定位方法获取补偿效益均高于投资费用的节点,建立待补偿节点集;以待补偿节点为基础,建立三相不平衡无功补偿模型,通过优化三角形、星型2种补偿回路的补偿电纳,构建无功和不平衡补偿模型,实现低压台区配电三相不平衡无功补偿。实验结果表明,采用所提出的方法补偿后的三相电流基本对称,三相功率因数大于1,能够实现三相不平衡无功补偿,且该方法能够降低电能损耗费用,优化电能质量,实际应用效果好。

In order to reduce the network loss and power loss cost of low-voltage substation area distribution system,and optimize the power quality,a three-phase unbalanced reactive power compensation method for low-voltage substation area distribution is proposed.Based on the node to be compensated,a three-phase unbalanced reactive power compensation model is established.By optimizing the compensation capacity of triangle and star compensation circuits,the reactive power and unbalance compensation models are constructed to realize the three-phase unbalanced distribution in low-voltage substation area reactive power compensation.The experimental results show that the three-phase current after compensation is basically symmetrical,the three-phase power factor is greater than 1,which can realize the three-phase unbalanced reactive power compensation,and the method can reduce the cost of power loss,optimize the power quality,and the practical application effect is good.