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基于故障电流变化率的本安短路保护电路设计 被引量:9

Design of intrinsically safe short-circuit protection circuit based on the rate of change of fault current
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摘要 针对目前矿用本安电源存在的保护反应速度慢、输出功率小,无法满足井下用电需求、制约井下集成化和智能化生产的问题,设计了一种基于故障电流变化率的本安短路保护电路。本文将本安电源等效为电势电容电路并进行短路故障特性分析,发现短路后故障电流迅速上升并发生突变;设计了基于故障电流变化率的本安短路保护电路,能够快速准确检测本安电源短路故障;本质安全性能测试结果表明:在发生短路故障后瞬态输出能量为80.667μJ,自恢复和软启动性能稳定,满足设计要求。 Aiming at the slow protection response and low output power of current mine intrinsically safe power supply,which cannot meet the needs of underground electricity and restrict underground integration and intelligent production,an intrinsically safe short-circuit protection circuit based on the change rate of fault current is designed.The intrinsically safe power supply is equivalent to a potential capacitance circuit and the short-circuit fault characteristics are analyzed.It is found that the fault current rises rapidly and abruptly occurs after a short-circuit;an intrinsically safe short-circuit protection circuit based on the change rate of fault current is designed,which can quickly and accurately detect the intrinsically safe power supply short-circuit fault;intrinsic safety performance test results show that:after a short-circuit fault,the transient output energy is 80.667μJ,self-recovery and soft-start performance are stable,which meets the design requirements.
作者 康骞 许春雨 田慕琴 宋建成 KANG Qian;XU Chun-yu;TIAN Mu-qin;SONG Jian-cheng(National and Provincial Joint Engineering Laboratory of Mining Intelligent Electrical Apparatus Technology,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Key Laboratory of Mining Klectrical Equipment and Intelligent Control,Taiyuan University of Technology,Taiyuan 030024,China)
出处 《煤炭工程》 北大核心 2022年第3期22-25,共4页 Coal Engineering
关键词 电势电容 故障电流变化率 本安短路保护 本质安全 electric potential capacitance fault current change rate intrinsically safe short circuit protection intrinsic safety
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