基于回路分析的含分布式电源配电网简化潮流计算  

Simplified Power Flow Calculation for Distribution Network With Distributed Generation Based on Loop Analysis

作　　者：牛焕娜[1] 井天军[1] 李汉成[2] 杨明皓[1] 鲁籍元[1] 

机构地区：[1]中国农业大学信息与电气工程学院,北京市海淀区100083 [2]北京市电力公司,北京市西城区100031

出　　处：《电网技术》2013年第4期1033-1038,共6页Power System Technology

基　　金：国家863高技术基金项目(2012AA050217);南方电网科技项目(K-GX2011-006)~~

摘　　要：针对含分布式电源(distributed generation,DG)的配电网快速潮流分析和实时调度计算的工程需要,提出了一种基于回路分析的实用简化潮流计算方法。该方法以回路分析法作为潮流计算的理论基础,并利用配电网各节点电压的相角相差不大等特点对回路电压方程进行化简,使其直接转化为线性代数方程;又利用PV节点类型的简化回路电压方程组获得PV型DG的发电无功功率;最后只需通过一次公式代入计算即可得到电压分布结果。IEEE 33节点算例表明,实用简化潮流计算方法用于含DG的配电网潮流计算与牛顿法相比,计算时间显著缩短,计算精度和计算时间符合快速潮流分析和实时调度计算的工程要求。To meet the engineering demand of distribution network containing distributed generation （DG） for fast power flow analysis and real-time scheduling, a loop analysis-based practical simplified power flow calculation method is proposed. The loop analysis method is the theoretical basis for power flow calculation and in view of small differences among phase angles of nodal voltages in the distribution network the loop-voltage equations are simplified to make them turned into linear algebraic equations directly; utilizing the simplified loop-voltage equations of PV-type nodes, the reactive power generated of PV-type DG can be obtained; finally through only once of substitution calculation the voltage distribution can be attained. Calculation results of IEEE 33-bus system show that applying the .proposed simplified algorithm to the power flow calculation of distribution network containing DG, the computing time is obviously shortened than that by Newton-Raphson method, and the accuracy and calculation speed can meet the engineering demand fast power flow analysis and real-time scheduling.

关 键 词：配电网 分布式电源 简化潮流计算 回路电压方 程 PV节点 

分 类 号：TM744[电气工程—电力系统及自动化]