配变三相不平衡全电容调节补偿的研究

Research on All-capacitor Adjusted Compensation for Three-phase Unbalance in Distribution Transformer

对低压配电网的不平衡度进行调节,且对降低电网的损耗、改善电能质量有着重大意义。考虑到配电网中实际负荷大部分为感性负荷,同时结合无功补偿尽量只使用电容、而不使用电感的原则,及实际加在各相中和各相间的电容量是有限的情况,分析了基于矢量分析法的全电容调节补偿模型,并以损耗最小为目标进行优化。再通过仿真验证其理论的正确性,且与传统的共补、分补混合补偿方法进行了比较,充分体现了该调节补偿方法的优越性。

In the low voltage distribution network,most of actual load is inductive load.Besides,the principle of reactive power compensation is only use capacitance instead of inductance,but the electric capacity between each phase is limited.Considering these facts,the paper proposed an all-capacitor adjusted compensation model taking minimal loss as the optimization goal based on time-vector method.Furthermore,simulation results verified the theoretical accuracy of the proposed model.And the model showed its superiority over traditional compensation methods.