基于多因素分析的配网线损改进方法研究

Study on Improved Loss Calculation Method for Distribution Network Based on Multiple Factor Analysis

对于配网线损计算,在传统算法中应用较多的是均方根电流法,它一般用于三相供电较平衡、负荷变化平缓、日负荷曲线峰谷差较小的情况。但由于目前配电网的自动化水平较低,数据采集系统存在一定误差,导致按照传统线损计算方法得到的结果会产生较大偏差。因此,通过对多种线损影响因素进行分析,引入电网规划建设因素、电网技术因素、运行管理因素,提出了一种基于多因素分析的配网线损改进方法,并根据实际数据对算法进行了验证。结果表明配网线损改进方法的计算结果精度更高,更加符合实际情况,有利于准确分析配网线损来源,合理使用降损措施,提高电网运行的经济性。

Root-mean-square (RMS) current method is widely used in loss calculation of distribution network. It’s applicable to the situation of balanced three-phase power and small change in load. But because of the low automation level,there still exists a certain amount of errors in data collection system, which leads to the large errors in the results of loss calculation. Thus, the paper came up with an improved loss calculation method based on multiple factors, including power network planning factors, technical factors and management factors. By the calculation case with actual data, the result showed that the improved method was more accurate than the traditional RMS current method, and can help to analyze loss composition more precisely, take reduction measures more reasonably and enhance economy of power network.