基于改进型前推回代法的分布式电源接入对主动配电网的影响研究  

Research on the Active Distribution Network With Distributed Generation Access Based on Improved Forward and Backward Substitution

作　　者：王凌云[1,2] 周小艺[1,2] 郑业爽[1] 

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002 [2]新能源微电网湖北省协同创新中心三峡大学,湖北宜昌443002

出　　处：《电力学报》2015年第3期190-194,227,共6页Journal of Electric Power

基　　金：国家自然科学基金(51407104);梯级水电站运行与控制湖北省重点实验室(三峡大学)开放基金(2013KJX09)

摘　　要：分布式电源(DG)接入配电网后,配电网由单向供电系统转变成双向供电多电源系统,配电网由单电源变成多电源,且DG不能简单处理为PQ节点。由于传统的前推回代法只能处理平衡节点和PQ节点,因此传统的配网潮流算法已不适用。本文分析了主动配电网的特性,并基于已有的并入分布式电源的潮流算法,对典型的前推回代法中处理PI节点的方法进行了改进,本质是将DG的PI节点在每步迭代时转化成PQ节点。通过在IEEE 18节点配电系统及IEEE 33节点配电系统大量验证,表明方法是可行的。分布式电源的恰当接入可以更有效的减少线路损耗、提升节点电压。A unidirectional power distribution network will be transformed into a bidirectional,multiple power supply distribution network after DGs access to the distribution network and DG can not be treated as PQ node which makes the traditional power flow algorithms inapplicable.In this paper,the characteristics of active distribution networks are analyzed firstly,the algorithm of solving PV nodes in forward and backward substitution is improved based on the existing power flow algorithm,the essence of this algorithm is to transform PI nodes into PQ nodes.Extensive validation of IEEE 18 and 33nodes distribution system indicates that this method is feasible.Numerical results show that when DG is accessed to the appropriate location with proper capacity,it has a significant capability to support the voltages level of distribution system.

关 键 词：分布式电源 主动配电网 前推回代法 潮流计算 

分 类 号：TM744[电气工程—电力系统及自动化]