智能电网
智能電網
지능전망
Smart Grid
2015年
5期
433-436
,共4页
钳形%电流互感器%气隙%等效模型%准确度
鉗形%電流互感器%氣隙%等效模型%準確度
겸형%전류호감기%기극%등효모형%준학도
clamp-shape%current transformers%air-gap%equivalent model%accuracy
钳形铁芯电流互感器在进行电流测量时无须截断导线，操作方便，但开合气隙的存在将会导致测量准确度不高及重复性差的问题。从磁和电两方面构建等效模型，分析气隙对钳形电流传感头准确度造成影响的原因，综合分析气隙存在时提高钳形互感器准确度的方法，最后对钳形铁芯传感头的发展趋势及应用动态提出看法。
鉗形鐵芯電流互感器在進行電流測量時無鬚截斷導線，操作方便，但開閤氣隙的存在將會導緻測量準確度不高及重複性差的問題。從磁和電兩方麵構建等效模型，分析氣隙對鉗形電流傳感頭準確度造成影響的原因，綜閤分析氣隙存在時提高鉗形互感器準確度的方法，最後對鉗形鐵芯傳感頭的髮展趨勢及應用動態提齣看法。
겸형철심전류호감기재진행전류측량시무수절단도선，조작방편，단개합기극적존재장회도치측량준학도불고급중복성차적문제。종자화전량방면구건등효모형，분석기극대겸형전류전감두준학도조성영향적원인，종합분석기극존재시제고겸형호감기준학도적방법，최후대겸형철심전감두적발전추세급응용동태제출간법。
ABSTRACT:It is easy to operate for iron core clamp-shape current transformers in the current measurement without truncating wire. But the air-gap can lead to low accuracy and bad repetitiveness. So the equivalent model is constructed considering the two aspects of magnetic field and circuit, and the reason for air gap to influence the accuracy of clamp-shape current sensing head is analyzed. Then comprehensive analysis is given for the method to improve accuracy of clamp-shape current transformers when the air gap exists, and opinions on the development trend and application of iron core clamp-shape current sensing head are put forward.
