阻容串联降压整流电路频繁发生烧毁的原因分析  

Analysis of Frequent Burnout of Resistance Capacitance Series Buck Rectifier Circuit

作　　者：潘英吉 PAN Yingji(Jilin Power Supply Company,State Grid Jilin Electric Power Co.,Ltd.,Jilin 132001,China)

机构地区：[1]国网吉林省电力有限公司吉林供电公司,吉林吉林132001

出　　处：《电器与能效管理技术》2021年第3期88-91,共4页Electrical & Energy Management Technology

基　　金：阻容串联降压整流电路频繁发生烧毁的原因分析。

摘　　要：应用电阻电容串联整流作为单相电子式电能表的工作电源,在运行中频繁发生电阻被烧毁现象。经理论和实测数据分析,认定非线性负荷产生的高次谐波电流,其中一部分流经电能表工作电源,引起基波电压发生畸变,同时改变了电容元件的运行参数,使之回路电流增大,是造成电阻烧毁的主要原因。针对这一问题,在电能表工作电源回路中串接一个高次谐波阻波器,保证了电能表安全可靠运行。Resistance capacitor series rectification is a common circuit used to provide DC power supply.When the circuit is used as the working power supply of single-phase electronic watt hour meter(WHM for short),the resistance is burned out frequently in operation.Through the analysis of theoretical and measured data,it is identified that the high-order harmonic current generated by nonlinear load flows through the working power supply of the electric energy meter,which causes the fundamental voltage distortion,and changes the operating parameters of the capacitor element,so as to increase the loop current,which is the main reason for the resistance burnout.In order to solve this problem,a high-order harmonic wave trap is connected in series in the power supply circuit of the WHM to ensure the safe and reliable operation of the WHM.

关 键 词：工作电源 谐波源 电阻烧毁 阻波器 

分 类 号：TM461[电气工程—电器]