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注入信号精确谐振测量配电网电容电流新技术
引用本文:曾祥君,易文韬,刘张磊,陈博,许瑶. 注入信号精确谐振测量配电网电容电流新技术[J]. 电力系统自动化, 2008, 32(4): 77-80
作者姓名:曾祥君  易文韬  刘张磊  陈博  许瑶
作者单位:1.宿迁学院机电工程系,江苏省宿迁市 223800; 2.徐州理工计算机工程技术研究所,江苏省徐州市 221008
基金项目:国家自然科学基金资助项目(50207001);教育部新世纪优秀人才计划资助项目(NECT-04-0781);霍英东教育基金会青年教师基金资助项目(101058);已申请国家发明专利(申请号200710034458-9).
摘    要:针对天津独流减河除险加固工程的实际情况和计算机监控系统网络架构的具体需求,应用施耐德TSX SCP114通信卡,结合MODBUS协议的特点,对监控系统的现地通信单元进行了组态设计;并从数据采集和数据输出2个方面对TSX SCP114的通信机理进行了深入研究,合理设计通信函数,提高了系统通信性能。

关 键 词:闸门监控系统  现地通信单元  组态设计
收稿时间:2007-09-14
修稿时间:2008-08-01

A Novel Technique of Capacitive Current Resonance Measurement with Signal Injected for Distribution Networks
ZENG Xiangjun,YI Wentao,LIU Zhanglei,CHEN Bo,XU Yao. A Novel Technique of Capacitive Current Resonance Measurement with Signal Injected for Distribution Networks[J]. Automation of Electric Power Systems, 2008, 32(4): 77-80
Authors:ZENG Xiangjun  YI Wentao  LIU Zhanglei  CHEN Bo  XU Yao
Abstract:A novel method of capacitive current measurement is proposed for distribution networks. An adjustable reactor is connected in series with the open-delta secondary of a zero sequence voltage transformer. The distribution network resonance frequency is sought by injecting a current signal with variable frequency. By adjusting the reactor, another resonance frequency is also sought. The distribution network capacitance and capacitive current to ground is then calculated using the two resonance frequencies. The measuring method has eliminated the influence of the voltage transformer leakage impedance on measurement. The measuring device developed has been tested in laboratory and real distribution networks. The results obtained show that the method proposed is highly accurate, capable of testing in real-time, and without interrupting power supply. It can be applied in distribution networks with neutral point unearthed or with Petersen-coil following-setting.
Keywords:sluice control system   local communication unit   configuration design
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