CAJ | 학술논문

针对单相电能表在0.5mT工频磁场干扰下存在误计量的问题，分析其主要原因在于工频磁场在电能表电流采样回路上产生了大于电能表起动的感应电流。对此，通过定量分析0.5mT工频磁场的影响量，根据磁通在交错的环中产生的感应电压是可抵消的，提出在不改变原有电路设计基础上，仅通过对分流器穿孔及改变双绞线焊接方式，来减小电能表电流采样回路上的感应电流。经外部工频磁场影响试验测试证明了该方法的可行性。
침대단상전능표재0.5mT공빈자장간우하존재오계량적문제，분석기주요원인재우공빈자장재전능표전류채양회로상산생료대우전능표기동적감응전류。대차，통과정량분석0.5mT공빈자장적영향량，근거자통재교착적배중산생적감응전압시가저소적，제출재불개변원유전로설계기출상，부통과대분류기천공급개변쌍교선한접방식，래감소전능표전류채양회로상적감응전류。경외부공빈자장영향시험측시증명료해방법적가행성。
The main reason for the measurement error problem existing in the single phase electricity meter under the 0 . 5 mT power frequency magnetic field interference is that the current generated by the power frequency magnetic field is larger than the start current in the current sampling circuit of electricity meter. The value interfered by the 0. 5mT power frequency magnetic field is analyzed quantitatively based on the theory of the induced voltage generated by mag-netic flux in the alternating loop offsets each other, and the method of only perforating the shunt and changing the welding position of twisted-pair cable is proposed to reduce the induced current in the current sampling circuit without changing the original circuit design. Actual experiments in the external power frequency magnetic field demonstration proves the feasibility of this method.