一种矿用低压漏电保护装置设计
Design of a mine-used low-voltage leakage protection device
【索引】郑庆乐,荣相,杨帆,等.一种矿用低压漏电保护装置设计[J].工矿千亿国际app下载,2020,46(2):12-17.
【Reference】ZHENG Qingle, RONG Xiang, YANG Fan,et al.Design of a mine-used low-voltage leakage protection device[J].Industry and Mine Automation,2020,46(2):12-17.
【DOI】10.13272/j.issn.1671-251x.17505
【作者】郑庆乐1,2,荣相1,2,杨帆1,2,李瑞1,2
【Author】 ZHENG Qingle1,2,RONG Xiang1,2,YANG Fan1,2,LI Rui1,2
【作者机构】1.中煤科工集团常州研究院有限公司, 江苏 常州213015;2.天地(常州)千亿国际app下载股份有限公司, 江苏 常州213015
【Unit】1.CCTEG Changzhou Research Institute, Changzhou 213015, China; 2.Tiandi(Changzhou) Automation Co., Ltd., Changzhou 213015, China
【摘要】针对基于零序功率方向选线原理的煤矿低压电网漏电保护装置可靠性不高的问题,给出了一种矿用低压漏电保护装置软硬件设计方案。该装置根据零序电抗器并联电阻接地系统发生单相接地故障时零序电流与零序电压相位差在非故障支路与故障支路中的差异性实现故障选线。仿真及试验结果表明,该装置不受电网中零序电抗器补偿的影响,发生单相接地故障时能够快速、可靠动作。
【Abstract】In view of low reliability of leakage protection device of coal mine low-voltage power grid based on line selection principle of zero-sequence power direction, a hardware and software design scheme of mine-used low-voltage leakage protection device was given. Fault line selection is realized according to differences of phase difference between zero-sequence current and zero-sequence voltage in non-fault branch and fault branch when single-phase grounding fault occurs in zero-sequence reactor grounding system with parallel resistance. The simulation and test results show that the device is not affected by zero sequence reactor compensation in power grid, and can operate quickly and reliably when single-phase grounding fault occurs.
【关键词】 煤矿低压电网; 漏电保护; 故障选线; 单相接地故障; 零序电抗器
【Keywords】low-voltage power grid of coal mine; leakage protection; fault line selection; single-phase grounding fault; zero-sequence reactor
【文献出处】工矿千亿国际app下载,2020年2期
【基金】天地科技股份有限公司科技创新创业资金专项项目(2018-TD-QN015)
【分类号】TD611
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