基于离线补充法的高压容性设备介质损耗在线监测研究

Research on On-line Dielectric Loss Test Method for High-Voltage Capacitive Equipment Based on Off-line Replenishment Method

随着对供电可靠性和试验数据准确性要求不断提高,预防性试验暴露出的问题越来越多,高压容性设备介质损耗在线监测的地位越来越突出。分析了高压容性设备的电气等效方法,论述了介质损耗的基本原理,介绍了容性设备介质损耗的2类测试方法即在线监测法和离线预防性试验法。并对比分析了绝对法和相对法2种计划带电测试法的优缺点。在此基础上,提出了一种基于离线补充法的闭环在线介质损耗测试,即指设备经过在线测试发现异常后对相应设备停电,弥补在线监测法的不足,最终确定设备是否投切,形成对容性设备状态的闭环控制。通过算例分析得出该方法可以减少容性设备的介质损耗,提高设备的运行维护效率。

With the increasing requirements to power supply reliability ＆ test data aeeuraey, more problems are exposed in preventive test, it is important to on-line monitor dielectric loss in high-wfltage capacitive equipment. The high voltage electrical equivalent methods of capacitive equipment is analyzed, the basic principle of dielectric loss is deseribed. The dielectric loss test methods for capacitive equipment including on-line monitoring and off-line preventive test method are introduced, and the advantages and disadvantages of the absolute and relative electric test method are compared. The closed loop on-line dielectric loss test based on off- line replenishment method is put fin＇ward. Namely through online tests, power off the corresponding equipment in ease of normal condition, improve the online monitoring method, eventually determine whether to switch on the equipnment, form the closed-loop conirol of capacitive equipment. The example analysis has proved that the method can reduce the dielectric loss of capacitive equipment, improve equipment ol）eration maintenance efficiency.