中性点不接地系统配网三相解耦潮流

Three-phase decoupled power flow for isolated neutral network

针对中性点不接地系统无零序通路的特点,提出了一种三相解耦潮流计算方法。该方法忽略零序分量的影响,使得不对称的三相负荷引起的相间耦合解耦,从而实现按相潮流计算。该算法将现有配网三相潮流算法中的3n阶节点电压方程分解为三个n阶节点电压方程,这样无论采用哪种算法都可以大大的节约了内存和计算量,为配电网实现按相分析提供了一种好方法。本文对以36节点的系统进行验证,计算结果表明该方法能充分计及负荷的三相不平衡的影响,有较好的运算速度和准确度。

In this paper,as the isolated neutral system without zero-sequence channel,a three-phase decoupled load flow algorithm is proposed.This method ignores the influence of zero sequence components,making phase coupling caused by the three-phase asymmetrical load decoupling,in order to achieve flow calculation by phase.The algorithm will be available the 3n-order node voltage equation in three phase power flow algorithm for distribution network is divided into three n-order equation,so that no matter what method can greatly save memory and computation,provides a good way for the distribution network analysis by phase.In this paper,a system of 36 nodes to verify,the results show that the method can fully into account the impact of unbalanced load,with better processing speed.