李鹏程,肖永,杨沁晖,钱坤,王吉,张俊玮.一种新型消除PT二次回路压降的装置与应用[J].电测与仪表,2016,53(17):. LiPengCheng,XiaoYong,YangQinHui,QianKun,WangJi,ZhangJunWei.A new Integrated device foreffectivelyeliminating voltage drop in PTSsecondarycircuit[J].Electrical Measurement & Instrumentation,2016,53(17):.
一种新型消除PT二次回路压降的装置与应用
A new Integrated device foreffectivelyeliminating voltage drop in PTSsecondarycircuit
Thevoltage drop in the PT secondary circuit is one of the main reasons ofleakageofelectricity measurement. A new scheme,based on voltage follower and precisionresistors, is proposed to eliminatethe voltage dropaccurately. Thevoltage follower and theprecision resistors are simultaneously workingin the secondary circuit.The precision resistors that are matchingthe resistors of electric energy meter, connect in parallel to the secondary circuit nearthe PT. The voltage follower is series connection to the secondary circuitneartheelectric energy meter. The device eliminatesaccuratelythe voltage drop beteen PT and the meter and its effectis equivalent to themeterconnecting next to the PT.The analysis of measurement data from practical applications verified the performance of the proposed device and its applicationfeasibility.