一种理解、分析三相电能表错误接线的方法

A Method of Understanding and Analyzing the Error Connection of Three-phase Electric Energy Meter

三相四线三元件、三相三线二元件有功电能表,经互感器接入计量的错误接线,均使用画电压、电流向量图和列计算式的方法进行分析,但这种方法抽象难理解。因此,对计算式方法进行改良,提出了一种新的图形分析方法,以对电能表各相运转情况进行直观表达,简化情况多样的错误接线、计算式,帮助深入理解电气运行原理。最后,通过分析多种常见错误接线,与计算式的化简结果作对比,验证了此方法的可行性。

Three-phase four-wire three-element and three-phase three-wire two-element active watt-hour meters are analyzed by drawing voltage,current vector diagrams and column calculating formulas,but this method is abstract and difficult to understand.Therefore,this paper improves the calculation method and proposes a new graphic analysis method to visually express the operation of each phase of the energy meter,simplify the wrong wiring and calculation formula of various situations,and help to understand the operation principle of electric power deeply.Finally,the feasibility of this method is validated by analyzing various common wrong wiring and comparing with the simplified results of the calculation formula.