基于前推回代法和量测数据资源的多电源供电配电网线损计算

Calculation of multi-source distribution network loss based on back/forward sweep method and measurement resource

针对某些山区的配电网有多个小水电站通过升压变直接接入网络的特点,在分析了当前几种适合10 kV配电网线损计算的方法后,利用配电网络上局部实时量测信息,借鉴配电网的CIM拓扑模型、电网状态估计和负荷预测思想,提出了配电网主线/支线间隔模型和利用前推回代法计算理论线损的原理、步骤及方法。算法采用pl/sql语言编程,以一条10 kV馈线数据为例,计算其潮流及理论线损,并与平均电流法做比较,结果表明所提出的方法可行,满足精度要求,优于传统方法。

For the distribution network of some mountainous area, which is directly connected with a number of hydroelectric power stations through step-up transformers, its main line/branch interval model and the principle, steps and method of network loss calculation with the back/forward sweep method are proposed after analyzing several calculation methods applied in 10 kV power distribution network. It applies the local real-time measurements of distribution network and the distribution network CIM topology model,as well as the grid state estimation and load forecast. The algorithm is developed with pl/sql language. For the data of a 10 kV feeder,its power flow and theoretic network loss are calculated,showing its feasibility and better precision than that by the monthly average current method.