低压配电设备故障诊断及运行监控系统

System of fault diagnosis and operation monitoring for low-voltage distribution equipment

针对德清电网低压配电设备故障抢修压力重、抢修速度慢等问题,提出了一种低压配电设备故障诊断方法及运行监控系统的设计。首先,低压配电监控设备通过有关传感器获取配电柜进出电缆线表面温度、电缆沟水位等数据,并由短信终端实现了实时数据采集,然后利用短信终端内置设备参数设置进行数据运算、对比和分析,最终诊断出了低压配电设备故障预(告)警信息,该信息经GSM和GPRS无线网络双通道同步传送,实现了低压配电设备的远程故障诊断和运行监控。系统运行结果表明,该方法达到低压配电监控设备临近故障的预警和故障后的告警信息实时传递,同时也实现了温度上限和水位上限的低压配电箱(柜)的供电回路自动隔离和自愈技术,提升了农村公变的安全防护水平。

Aiming at heavy burden and low efficiency of fault repairing for low-voltage distribution equipment of Deqing power grid, a method for fault diagnosis of low-voltage distribution equipment and design of operation monitoring system was proposed. Firstly, some data such as surface temperature of inlet-outlet line in the distribution box and the water level of cable trench were measured by using corresponding sensors integrated in the monitoring device for low-voltage distribution equipment, and data acquisition was realized by using short message terminal. Secondly, data operation, comparison and analysis utilizing the build-in equipment parameter of short message terminal was performed. Finally, fault forecast/alarm messages synchronously were transferred through GSM and GPRS dual- channel wireless network. The results of the processing of the system indicate that the method realizes faulty forecast and real-time transmission of an alarm message for low-voltage distribution monitoring equipments. Meanwhile, auto-isolation and self-healing technologies for the power supply circuit of low-voltage distribution box about upper limit of temperature and water level have been invented. Consequently,the safeguarding level of public transformer in a rural area has been improved.