一种配电网Zbus潮流算法

针对Zbus高斯算法处理配电网PV节点能力弱、计算量大,忽略平衡节点的三相不对称问题,提出一种新的配电网Zbus潮流算法.该算法从基于叠加原理的改进Zbus算法出发,用补偿法处理PV节点,对网络方程进行虚实部分解,得到简单的雅克比矩阵;通过引入内电势节点来处理平衡节点处的三相电压不平衡问题.算例分析表明该算法计算速度快,收敛性和稳定性较好,克服了Zbus高斯算法的弱点.

A Power Flow Algorithm for Disitribution Network Zbus

On account of Zbus Gaussian algorithm is poor in processing PV nodes of distribution network,and has a large scale of computing.With ignoring the problem of balance nodes' asymmetric three-phase,we put forward a new Zbus power flow algorithm for distribution network.The algorithm derives from improved Zbus algorithm which is based on the superposition principle.First we adopt the compensation method to process PV nodes,then proceed real and imaginary part decomposition of network equation,and obtain a simplified Jacobi matrix.In addition,we resolve the problem of balance nodes' three phase voltage unbalance by introducing internal potential nodes.The examples indicate that the new Zbus power flow algorithm has the advantages of high speed,good convergence and stability.What's more,the new algorithm overcomes the weaknesses of Zbus Gauss algorithms.