CAJ | 학술논문

四川电网变电站多地处潮湿、高低温交变地区，变电站直流回路容易出现因绝缘下降导致的接地故障。现有直流绝缘监测装置难以准确判定直流接地位置，查找并排除直流接地故障耗时费力，因此有必要研究采用新的直流接地定位技术。提出了一种分布式布置的直流接地定位装置构成的直流接地定位系统。该装置利用传感器技术、嵌入式微处理芯片、通信及信号处理技术等高新技术手段，对各直流负载回路的直流参数采集判断并汇总到集中式检测单元，能快速确定直流回路中的具体接地点的位置。既可以在变电站本地查看直流系统的绝缘情况，还可实时将判断结果传送至远方的监控中心。在试验变电站安装了直流接地定位装置，验证了该系统的有效性。
사천전망변전참다지처조습、고저온교변지구，변전참직류회로용역출현인절연하강도치적접지고장。현유직류절연감측장치난이준학판정직류접지위치，사조병배제직류접지고장모시비력，인차유필요연구채용신적직류접지정위기술。제출료일충분포식포치적직류접지정위장치구성적직류접지정위계통。해장치이용전감기기술、감입식미처리심편、통신급신호처리기술등고신기술수단，대각직류부재회로적직류삼수채집판단병회총도집중식검측단원，능쾌속학정직류회로중적구체접지점적위치。기가이재변전참본지사간직류계통적절연정황，환가실시장판단결과전송지원방적감공중심。재시험변전참안장료직류접지정위장치，험증료해계통적유효성。
Most of the substations in Sichuan power grid are located in humid and high and low temperature alternating areas , so the DC circuit of the substations is prone to ground fault caused by insulation deterioration .It is difficult for the DC insula-tion monitoring device to determine the location of the DC ground accurately and it will take a lot of time and work to find out and remove the ground fault , so it is necessary to adopt a new DC ground location technology .A DC ground location system composed of distributed DC ground location device is presented .With the use of sensor technology , embedded micro -pro-cessing chip, communication and signal processing technology and other high -tech means, this device collects and judges the DC parameters of the DC load circuit and gathers them into a centralized detecting unit , so it can quickly determine the specif-ic ground point of the DC circuit .It is not only able to monitor the insulation condition of the DC system locally , but also will send the judgments to the remote monitoring center in real -time.The DC ground location device is installed in a selected substation and the running results indicate that it is effective .