基于多元线性回归的单相电表相别判断方法

单相电表的相别信息对提高负荷管理和建模水平、改善供电质量和供电可靠性具有重要意义。依据单相电表采集电气量与供电台区关口电表采集电气量间的关联关系,提出一种基于多元线性回归的单相电表相别判断方法,构建了以关口电表电压、电流和单相电表电流为自变量,以单相电表电压为因变量的多元线性回归方程,对每一个单相电表分别计算其与关口电表A、B、C相构成的3个回归方程的决定系数,根据决定系数的大小来判断相别。利用实际抄表数据对所提方法进行了算例分析,分析结果表明所提方法具有较高的准确性和可靠性。

Method for single-phase electric meter phase identification based on multiple linear regression

The phase information of single-phase electric meter is crucial to improve the level of load management, the quality of modeling, as well as the quality and the reliability of power supply. According to the relationship between the electric quantities collected by the single-phase electric meter and the gateway meter in the power supply region, a method for single-phase electric meter phase identification based on multiple linear regression is proposed. The multiple linear regression equation takes the single-phase electric meter voltage as the dependent variable. Meanwhile, it takes the gateway meter voltage, the gateway meter current and the single-phase electric meter current as the independent variables. Each single-phase electric meter forms three regression equations with the gateway meter phase A, B and C respectively. The determination coefficients of the three regression equations are calculated. According to the value of the coefficients, the phase of single-phase electric meter is determined. An example is given to analyze the proposed method with actual energy meter reading data. The analysis results show that the proposed method has higher accuracy and reliability.