为了准确计算低压配电网的线损,分析了三相不平衡对线损的影响,推导出三相不平衡度与线损增加率的关系公式,提出了三相不平衡度函数公式.该公式可直接应用于三相不平衡线路的损耗分析中,简化了计算工作.针对低压配电网线路的运行特点,以等值电阻法为基础,提出了将该函数公式应用于低压配电网的理论线损计算方法.最后以某台区实际运行数据为研究实例,结果表明,与传统方法相比,该算法简捷有效,提高了低压配电网线损理论计算的精度,计算结果更逼近线损的真实值.%In order to accurately calculate the line losses of low voltage distribution network, the paper analyzed the influence of three-phase unbalanced on line loss, deduced the formula about the relationship between the three-phase unbalance factor and the line loss rate of increase, and put forward the function formula of three-phase unbalance factor. The formula can be applied directly to the analysis of three-phase unbalanced line loss and simplified calculation. It also suggested applying this formula to the calculation method for the theoretical line loss of the low-voltage distribution network according to the running characteristics of the low-voltage distribution network lines and based on the e-quivalent resistance method. Finally, based on the actual operating data of a district, that algorithm is more simple and effective and improves the calculation accuracy of the line losses for the low-voltage distribution network, and the calculation is closer to the true value of the line losses compared with the traditional methods.
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