Special transformer user metering abnormity monitoring method

The invention provides a special transformer user metering abnormity monitoring method, which is based on a transformer external characteristic principle, and can speculate whether a metering device has abnormity or electricity stealing by analyzing whether a change relation of a voltage at a low-voltage side of a transformer along with a load meets the transformer external characteristic principle. Compared with an on-site detection method, the method is higher in economical efficiency and practicability, a misalignment detection multi-target optimization model can be established according to the three-phase line voltage balance degree of a self-metering point and the line voltage fluctuation degree of each phase, the situation of misjudgment or missed judgment is reduced, and the accuracy of an output result is improved. 本发明提出一种专变用户计量异常监测方法，该方法基于变压器外特性原理，通过分析变压器低压侧端电压随负载的变化关系是否满足变压器外特性原理，可推测计量装置是否存在异常或窃电。相比于现场检测方法，经济性、实用性更高，能够根据自身计量点三相线电压平衡程度以及每相线电压波动程度建立失准检测多目标优化模型，减少误判或漏判的情况，提高输出结果的准确率。