直流充电桩绝缘电阻在线检测与电量计量系统设计
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摘要
针对现有直流充电桩绝缘检测的需求,通过电阻分压采样、光电继电器控制回路,设计一种不平衡电桥绝缘电阻在线检测电路,同时在系统中加入电量计量与电源反接报警功能。运用本系统进行绝缘检测检测结果表明,在不同情况下的绝缘检测精度都控制在5%之内,系统可以满足在复杂环境下的检测的有效性。
In order to meet the needs of insulation detection for DC charging piles, an on-line detection circuit for insulation resistance of unbalanced bridge is designed by means of resistor voltage dividing sampling and photoelectric relay control circuit. At the same time, the functions of electric quantity measurement and power supply reverse connection alarm are added to the system. The results of insulation testing using this system show that the accuracy of insulation testing under different conditions is controlled within 5%. The system can meet the detection effectiveness in complex environment.
In order to meet the needs of insulation detection for DC charging piles, an on-line detection circuit for insulation resistance of unbalanced bridge is designed by means of resistor voltage dividing sampling and photoelectric relay control circuit. At the same time, the functions of electric quantity measurement and power supply reverse connection alarm are added to the system. The results of insulation testing using this system show that the accuracy of insulation testing under different conditions is controlled within 5%. The system can meet the detection effectiveness in complex environment.
引文
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[2]罗文雲,周浩,李金宝.国内外电动汽车充电设施发展现状综述[J].机电信息,2017(24):156-157.
[3]李悦.直流绝缘监测系统的研究[D].南京师范大学,2012.
[4]任谊,沙立民,姜雨,熊笛.单回路直流系统绝缘电阻检测装置技术研究[J].电子测量技术,2014,37(03):10-14.
[5]陶显峰.电动汽车直流充电桩自动测试平台的设计与实现[D].电子科技大学,2018
[6]蔡聪朝,万英飞,刘勇,阮少青.直流充电桩的潜在电击风险分析和设计[J].自动化应用,2016(08):34-36.
[7]吕强.直流系统绝缘检测设计与实现及故障诊断专家系统研究[D].河海大学.2007.
[8]冯兴海,孙洪雨.直流系统几种绝缘检测方法介绍[J].电源技术应用,2007.
[9]GBT18487.1-2015传导充电系统通用要求[S].中国标准出版社.2015.
[10]梁沛锋.直流充电桩绝缘监测装置的开发设计[D].广东工业大学,2018.
[11]陈剑杨.试论大型发电厂复杂直流系统的直流绝缘接地故障支路巡检技术[J].北京电力高等专科学校学报:自然科学版,2010,27.
[12]成林俞,戴瑜兴,熊书华,李显国.直流系统在线绝缘监测的研究及其实现[J].电子测量与仪器学报,2015,29(06):860-865.