基于负荷等效电导迭代的直流配电网潮流算法

分布式电源并网技术需求加快了直流配电网的发展。该文针对低容量多电源的直流配电网潮流计算问题,通过重新定义直流配电网的节点类型,提出了一种负荷等效电导的迭代思想。该方法结合节点电压迭代法,可以快速求解直流配电网的网络潮流。使用该方法对目前常见的"手拉手"直流配电网拓扑进行计算,反推验证了其合理性和有效性。算例结果表明,该方法的收敛速度前期较快,后期逐渐收敛到真值附近;对于潮流计算精度要求较低的系统,可以采用前3步的迭代结果作为其潮流值,不但可以快速求解,还可以得到理想的计算值。

Power Flow Algorithm of DC Distribution Network Based on Load Equivalent Conductance Iteration

The connection of distributed power generation promotes the development of DC power distribution networks.This paper proposes an iterative algorithm using equivalent load conductance for the power flow calculation of DC distribution network with low power and numerous sources by redefining the node type of DC distribution network.This method can quickly solve the DC distribution network power flow in combination with a node voltage iteration method.This method is used to calculate the common DC distribution network topology of 'hand-in-hand', which is proved to be operational and effective.The example calculation results show that the convergence rate of this method is faster in the early period and gradually converges to the true value in the later period.For the system with lower precision requirement of power flow calculation, the results of the first three steps can be used as the power flow value, which can get the ideal calculated value with a faster speed.