CAJ | 학술논문

直流偏磁与剩磁的存在会改变测量用电流互感器在铁心磁化曲线上的工作点，直接影响电能计量与测量的准确性。提出了一种基于三参数正弦曲线拟合算法的比差、角差测量方法，并通过实验分析了直流偏磁与剩磁对测量用电流互感器误差特性的影响。实验数据表明，直流偏磁与剩磁都会使比差和角差向着不同的方向增大，而且当直流偏磁与剩磁同方向同时存在时误差将会远远超过规定的限值，从而导致电能计量与测量的结果出现较大偏差。
직류편자여잉자적존재회개변측량용전류호감기재철심자화곡선상적공작점，직접영향전능계량여측량적준학성。제출료일충기우삼삼수정현곡선의합산법적비차、각차측량방법，병통과실험분석료직류편자여잉자대측량용전류호감기오차특성적영향。실험수거표명，직류편자여잉자도회사비차화각차향착불동적방향증대，이차당직류편자여잉자동방향동시존재시오차장회원원초과규정적한치，종이도치전능계량여측량적결과출현교대편차。
DC bias and remnant fIux wiII change the measuring current transfOrmer wOrking pOint in the cOre magnetizatiOn curve and have a direct impact On the accuracy Of eIectric energy measurement. An errOr measurement methOd based On the aIgOrithm fOr three-parameter Ieast squares fit tO sine wave is put fOrward and the infIuence Of DC bias and remnant fIux On errOr characteristics Of current transfOrmer is aIsO investigated thrOugh experiments. The experimentaI data shOws that DC bias and remnant fIux wiII increase the ratiO errOr and phase dispIacement in OppOsite directiOns and the ratiO and phase dispIacement wiII be far mOre than the Iimit vaIue when they are exist in same directiOn at the same time . This wiII seriOusIy affect the transmissiOn accuracy Of current transfOrmer.