配网三相负荷不平衡治理方案研究与应用

Research and Application of Unbalanced Three-phase Load Control Scheme for Distribution Network

三相负荷不平衡现象普遍存在于我国0.4 k V配电网中。这种不平衡会引起配变力率下降、线损增大、低电压等问题。通过分析三相负荷不平衡对配电网经济运行水平和电能质量的影响、研究现状,提出了一种应用三相换相装置解决配电网三相负荷不平衡问题的方案,重点对换相装置的原理及换相策略等进行了分析,通过理论计算与应用实践,证明了方案的可行性。

The unbalanced three-phase load is prevalently in the 0.4 kV distribution network in China.This unbalance will cause problems such as decrease of power factor,increas,of line loss and low voltage.The analysis of the influence of three-phase load unbalance on the economic operation level and power quality of distribution network,research status,produced a proposal of a scheme to solve the unbalanced three-phase load problem of the distribution network by using three-phase commutation installation with focus on analysis of the principle and strategy of commutation installation.Through theoretical calculation and application practice,the feasibility of the scheme is proved.