摘要
针对现有电容电流测量设备存在安全隐患的问题,文章提出了一种基于DSP的在线电容电流测量设备的设计方案,介绍了该设备的测量原理、硬件和软件的设计。该设备采用信号注入法测量电网电容电流：由消弧线圈二次侧在线注入20-80 Hz、步长为0.2 Hz、幅度相等的信号,通过DSP处理电网的反馈信号得到电网系统的谐振频率,间接计算得到电网电容电流。该设备解决了电容电流测量的安全性问题。
In order to resolve the problem of hidden trouble about safety in existing capacitiance current measurement device,the paper put forward a design scheme of on-line measurement device of capacitance current based on DSP,introduced the measurement principle,design of hardware,and software of the device.The device uses the signal-injection method to measure capacitance current of power network which uses arc-suppression coil to on-line inject signal range from 20 Hz to 80 Hz with step 0.2 Hz and equal amplitude into secondary side of arc-suppression coil,uses DSP to process feedback signal to get resonate frequency of power network system,then indirectly gets capacitance current.The device solves the problem of safety of mesuring capacitiance current.
出处
《工矿自动化》
2009年第8期126-128,共3页
Journal Of Mine Automation
关键词
配电网
电容电流
在线测量
消弧线圈
DSP
distribution network
capacitiance current
on-line measurement
arc-suppression coil
DSP
