改进等值电阻法进行配电网线损.docx

STYLEREF 标题 1 摘要 摘要 电能是现代社会生产和生活的主要能源，电能在传输和分配过程中必然要产生一定的损失，这种损失称为电能的损耗。近年来，随着电力体制改革的不断深入，供电企业从电力企业发展为电力市场的竞争主体，在市场竞争中供电企业需要提高供电服务水平以赢得用户，因此降低线损是供电企业追求经济效益的重要手段。线损是供电企业在生产、经营、管理和服务等活动中消耗的电能总量与其所获得的经济利益之间的比值。为了衡量线损大小，通常以单位长度线路或单位时间内所消耗电能为单位进行计算。一般来说，线损的计算方法有3种：即电量平衡法、等值电路法和最小二乘法。本文主要介绍改进等值电阻法进行配电网线损计算，以供参考。 等值电阻法是一种基于配电网络中节点电压分布的物理模型来计算配电网理论线损方法。该方法将配电网中的所有节点看成是等值电阻的节点，并假设其阻抗为各节点电压之和。该方法通过对各节点电压和各线路电流进行线性变换，得到一个新的线性方程组。利用该方程组即可对配电网中所有节点电压进行计算，得到各个节点在某时刻各线路电流分量，从而计算出配电网的理论线损。 关键词：配电网；理论线损计算；改进等值电阻法；电能损耗 STYLEREF 标题 1 摘要 Abstract Electric energy is the main energy source for production and life in modern society, and electric energy must produce certain losses in the process of transmission and distribution, which is called the loss of electric energy. In recent years, with the deepening of the reform of the electric power system, power supply enterprises have developed from power enterprises to competitors in the power market, and power supply enterprises need to improve the level of power supply services to win users in the market competition, so reducing line loss is an important means for power supply enterprises to pursue economic benefits. Line loss is the ratio between the total amount of electrical energy consumed by power supply enterprises in production, operation, management and service activities and the economic benefits obtained. To measure the size of line loss, it is usually calculated in units of power consumed per unit length of line or per unit time. In general, there are three methods for calculating line loss: the charge balance method, the equivalent circuit method, and the least squares method. This paper mainly introduces the improvement of the contour resistance method for the calculation of line loss in distribution network for reference. The equivalent resistance method is a method for calculating the theoretical line loss of the distribution network based on the physical model of the voltage distribution of nodes in the distribution ne