Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

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带电测量断路器接触电阻方法的研究

来源:电工电气发布时间:2016-03-14 15:14 浏览次数:7

带电测量断路器接触电阻方法的研究 

陈杏灿,程汉湘,彭湃,冼冀 
广东工业大学 自动化学院,广东 广州 510006 
 

摘 要:提出了一种可对运行中的断路器实时测量其接触电阻的新方法。通过两个电压互感器采集断路器两端对地电压,求得断路器两端的电压差,同时测得流过断路器的电流,根据欧姆定律即可得接触电阻。分析表明,该方法可在保证测量系统与高压隔离的前提下,实时带电测量断路器的接触电阻。对预防断路器的安全事故,保证断路器可靠运行具有重要意义。
关键词:断路器;接触电阻;带电测量
中图分类号:TM561;TM934.14 文献标识码:A 文章编号:1007-3175(2015)04-0046-03


Design of Electrified Measuring Contact Resistance in Circuit Breakers 

CHEN Xing-can, CHENG Han-xiang, PENG Pai, XIAN Ji 
Faculty of Automation, Guangdong University of Technology, Guangzhou 510006, China 
 

Abstract: This paper presented a new real-time measuring method for the contact resistance of the operated circuit breakers. A pair of potential transformer worked in parallel to measure indirectly the voltage difference on the two terminals of the circuit breaker, while the currents flowing through circuit breakers were measured by current transformers. The result of contact resistance could be obtained based on Ohm Law. The analysis shows that this method could not only guarantee the isolation between control system and strong current, but also measure the contact resistance in real time, which would effectively prevent circuit breakers accidents.
Key words: circuit breaker; contact resistance; live line measurement


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