三相四线静止式多功能电能表错误接线时退补电量算法研究

Error-wiring correction approach for three-phase four-wire static multifunctional electric energy meter

电能的准确计量关系到电力企业和广大电力用户的切身利益。如果电能计量装置接线错误,将会引起计量差错,甚至造成经济纠纷。在纠正接线错误引起的电能计量差错过程中,多数情况下,确定更正系数是核算退补电量的前提。由于更正系数往往与功率因数角有关,且功率因数角又实时变化,因此将给退补电量的核算带来误差或不便。分析了三相四线静止式多功能电能表可能出现的错误接线情况,通过向量分析推导出实际有功电量与无功电量的表达式,实现了不依赖功率因数而进行退补电量的计算,提高了退补电量核算的准确性与便捷性。

Accurate measurement of electric energy is related to the immediate interests of the general electric power enterprise and users. If there is an incorrect wiring event of the electric energy metering device, it will cause metering mistake and even may cause economic disputes. In most process of correcting metering misalignment caused by incorrect connection, determining the correction coefficient is the precondition of calculating electricity for return or compensation. The correction coefficient is often associated with the power factor angle which is probably real- time changing,what will bring calculating misalignment or inconvenience. This paper lists some possible event about false wiring of three- phase four- wire electric energy meter. The expression of actual active power and reactive power is deduced by means of vector analysis, what makes the calculation more accurate.