| 引用本文: | 李玲,李国庆,王振浩,王新立.双单片机电容电流监测装置设计[J].电力自动化设备,2006,(8):78-80 |
| .Design of capacitance current monitoring equipment with dual SCMs[J].Electric Power Automation Equipment,2006,(8):78-80 |
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| 摘要: |
| 论述了采用注入变频信号测量电容电流的原理。电容电流监测装置分为主机和从机2部分,主机由以CPUAT89C52为核心的信号提取、数字采集和人机接口3部分构成,从机是CPU AT89C51为核心的信号驱动、光电隔离及变频信号源电路构成的变频信号发生器,主机和从机以串口实现通信。给出了子机的主程序和中断处理子程序框图。监测装置已通过实验室调试,证明所提出的检测出电网的谐振频率后就可求得电网的对地电容电流,从而可得到消弧线圈精确补偿依据的方法是合理和可行的。 |
| 关键词: 双单片机,电容电流,变频信号法 |
| DOI： |
| 分类号:TM933.1 TP368.1 |
| 基金项目: |
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| Design of capacitance current monitoring equipment with dual SCMs |
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LI Ling LI Guo-qing WANG Zhen-hao WANG Xin-li
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| Abstract: |
| The principle of capacitance current measurement based on the injecting signal is discussed.The capacitance current monitoring equipment with dual SCMs(Single Chip Microprocessors)includes a host computer and a subordinate computer.Taking AT 89C 52 as the core,the host computer is composed of signal extraction,data collection and man-machine interface.Taking AT 89C 51 as the core,the subordinate computer is composed of signal driving,photoelectrical isolation and variable frequency signal generator.The serial communication is realized between them.Main and interruption routines of the subordinate computer are given.The equipment has been tested in the laboratory,and the proposed method,that the accurate compensation with arc-suppression coil can be obtained according to the capacitance current calculated with the detected resonance frequency of the power system,is proved to be rational and feasible. |
| Key words: dual SCMs,capacitance current,injecting signal method |
