基于归一负荷矩的中压配电网馈线负荷裕度分析

Analysis on Feeder Load Margin of Middle-voltage Power Distribution Network Based on Normalized Load Moment

目前对于影响馈线负荷裕度的因素研究相对较少,用户负荷接入点的选取主要依靠配电网规划人员的经验,缺少相应的辅助分析方法和理论支持。针对此种情况,基于归一负荷矩法在配电网中的应用,通过实际案例计算分析了10 kV馈线的负荷矩裕度与负荷裕度之间的内在量值关系,得出在配电网络结构及参数保持不变的前提下,馈线系统的负荷矩裕度越大,其可接纳的负荷裕度也越大,且沿线各杆位的负荷裕度与它和首端的距离呈反比的结论;同时提出了一种简便可行的中压馈线负荷接入点选取方法,也可适时地将网架改造计划纳入配电网滚动规划。

There are less studies on factors influencing feeder load margin at present, and selection for customer load access points mainly depends on experiences of power distribution network planning staffs due to lack of auxiliary analysis methods and theoretical support. Therefore, this paper analyzes relationship between load moment margin and load margin of 10 kV feeder line based on application of normalized load moment method and actual case calculation. It draws conclusion that on the premise of keeping structure and parameters of the power distribution network unchanged, the more the load moment margin of the feeder system is, the more the acceptable load margin is, and load margin along each pole shows an inverse correlation with distance from itself to its head end. It presents a kind of simple and feasible selection method for load access point of middle-voltage feeder line which is able to timely bring transformation plan for network structure into power distri- bution network running planning.