配电电缆电气参数测量用脉冲发生器研制与试验  

Development and test of pulse generator for measuring electrical parameters of distribution cables

作　　者：张龙 黄亭 Zhang Long;Huang Ting(State Grid Xi’an Power Supply Company,Xi’an 710032;Shaanxi Power Transmission and Transfer Engineering Co.,Ltd,Xi’an 710014)

机构地区：[1]国网西安供电公司,西安710032 [2]陕西送变电工程有限公司,西安710014

出　　处：《电气技术》2020年第3期84-90,共7页Electrical Engineering

摘　　要：低压脉冲发生器是振荡波电压检测系统中用以测试电缆基本电气特性参数的重要单元,其性能对局部放电正确评估和精确定位有着重要影响。本文基于单片机控制和具有快速开断特性的金属-氧化物半导体场效应晶体管,研制了一台用于配电电缆传播常数测量和局部放电标定的脉冲发生器,并进行相应试验与分析。结果表明,该脉冲发生器产生的脉冲满足上升沿陡的要求,达到了灵活调节脉宽和幅值的目的,测得的电缆电气特性参数较为准确。The low voltage pulse generator is an important unit in the damped AC(DAC)voltage test system to test the basic electrical characteristics of cables.Its performance has an important impact on the correct evaluation and precise location of partial discharge.Based on the control of MCU and the MOSFET with fast interruption characteristics,a pulse generator for measuring transmission constant and calibrating partial discharge of distribution cables is developed and tested.The results show that the generated pulse meets the requirements of steep rising edge and flexible adjustment of pulse width and amplitude.The measured electrical characteristic parameters of cables are comparative accurate.

关 键 词：低压脉冲 局部放电标定 脉冲电流法 特性参数 脉冲发生器 

分 类 号：TM855[电气工程—高电压与绝缘技术]