摘要
针对分布式电源接入配电网的不同特点,论文将分布式电源(DG)划分为PV、PQ、PQ(V)三种不同节点类型,并构造出并网后的配电网潮流分析等效模型。利用叠加原理改进了前推回代算法,并应用于求解弱环网配电系统的潮流分析问题,通过将合环点处等效成两个电压源,则把弱环网拆分为纯环形网络与纯辐射状网络。对纯辐射状网络可以用前推回代法进行求解,对纯环形网络根据叠加定理把各回路电流与对应的支路电流相加后回推计算得到各节点的电压。通过对IEEE-33配电网系统实验结果表明,所提出的基于叠加原理改进的前推回代算法法计算潮流能够获得较好的收敛效果。
According to the different characteristics of distributed generation(DG)connected to distribution network,this paper divides DG into PV,PQ,PQ(V)three different node types,and constructs an equivalent model for power flow analysis of grid-connected distribution network. The forward and backward substitution algorithm is improved by using the superposition principle,and is applied to solve the power flow analysis problem of the distribution system of weak loop network. Pure radial network can be solved by forward and backward substitution method. The voltage of each node can be calculated by adding the current of each loop and the corresponding branch current according to the superposition theorem. The experimental results of IEEE-33 distribution network show that the improved forward-backward algorithm based on superposition principle can obtain better convergence effect.
作者
张鹏
刘超
张寓涵
王辉
罗璇
ZHANG Peng;LIU Chao;ZHANG Yuhan;WANG Hui;LUO Xuan(State Grid Shaanxi Electric Power Company Economic Research Institute,Xi'an 710075)
出处
《舰船电子工程》
2019年第7期123-127,共5页
Ship Electronic Engineering
关键词
分布式电源
配电网
潮流分析
前推回代法
叠加原理
distributed generation
distribution network
power flow analysis
forward backward substitution method
superposition principle
