不平衡运行配电网线损分析及无功补偿的仿真

三相系统的不平衡运行会引起线损的增加,为此需通过无功补偿使其平衡。从理论上分析了三相不平衡时线损增加的程度,运用瞬时无功功率的理论和方法,通过仿真进行了验证。仿真结果表明,可实现对不平衡负荷电流的完全补偿,由此大大减少了损耗,提高了电能质量。

Line Loss Analysis and Simulation of Reactive Power Compensation of Three-phase Unbalanced Operation Distribution Network

Line loss will increase if three-phase system is in unbalanced operation state, thus it is needed to make the system to he in balanced state through reactive power compensation. The paper analyzes theoretically the extent to which the loss will increase, also performs simulation for verification by applying the theory and approach of instantaneous reactive power. The simulation result shows that the full compensation to unbalanced load current can be realized, and in this way line loss will he greatly reduced and power quality will be improved.