辐射型配电网合环稳态电流计算方法研究  

Calculation of the loop closing steady-state current in radial power distribution network

作　　者：汲亚飞[1] 赵江河[1] 

机构地区：[1]中国电力科学研究院,北京100192

出　　处：《电力系统保护与控制》2009年第12期15-19,共5页Power System Protection and Control

摘　　要：对辐射型配电网合环操作引起合环稳态电流进行计算和分析对配电网的安全运行有重要意义。研究了辐射型配电网合环稳态电流的计算方法。采用基于关联矩阵的电压电流迭代方法对合环前的支路潮流分布情况进行计算,进而结合叠加原理求得合环后各支路的电流分布情况。针对澳门电网(CEM)11kV辐射型配电网的典型实例,对其合环前后的电流分布进行计算,并将计算结果与实测结果进行比较,验证了本文方法的准确性和实用性。最后分析了母线节点的电压相角差和幅值差变化对合环后电流分布的影响。Calculating and analyzing to the steady-state current caused by loop closing operations in radial power distribution networks are extraordinary important to the safe operations. This paper studies the calculation method of loop closing steady-state current in radial distribution networks. The voltage and current iterative method based on associated matrix is introduced to calculate the power flow distributed in each branch before the loop closing operation, and then the superposition principle is involved to obtain the current distribution after the loop closing operation. To the typical example in Macao-CEM 1 lkV power distribution networks, of which the current distribution before and after loop closing operation is calculated, the accuracy and practicability of the method proposed are certified by the comparisons between calculation results and measurement results. Finally, this paper analyzes the influence to the current value after operations led by the variations of bus node voltage phase angle difference and amplitude difference.

关 键 词：辐射型配电网 叠加原理 合环稳态电流 潮流 相角差 

分 类 号：TM712[电气工程—电力系统及自动化]