Ring main unit is a kind of equipment mainly used in the power system to achieve power distribution and management, with the function of protection, isolation and automatic control, through the safe distribution and management of power resources, to ensure the reliability and stability of the power system, is an important "bridge" in the urban power distribution system.
In the long-term operation process of the ring main unit, its electrical insulation structure may be aging or damaged due to various factors such as external environment, electric field stress, improper operation, etc., which leads to the occurrence of partial discharge. In order to avoid partial discharge of the ring main unit, the power system operation and maintenance personnel will regularly inspect and maintain the ring main unit, and use ultrasonic detection method, transient ground wave detection method, electric pulse detection method or ultra-high frequency detection method and other technical means to carry out detection work, which can prevent partial discharge caused by insulation damage to a certain extent, but can not find the partial discharge problem in a more timely and effective manner and prevent and effectively avoid the sudden impact of partial discharge of ring main unit on the power system.
Shaanxi public for the partial discharge of the ring main unit designed a long-term, effective monitoring method, the use of research and development of partial discharge monitoring device, the operation status of the ring main unit real-time monitoring, in a timely and rapid discovery of abnormal conditions at the same time, the insulation fault problem for accurate diagnosis.
The partial discharge monitoring device collects and obtains the internal partial discharge signal and temperature data of high-voltage electrical equipment in real time through ultra-high frequency sensors and temperature measurement sensors, and alarms when necessary. The noise signal and the discharge signal are separated by pulse comparison, hardware filtering and other methods, and the discharge waveform is analyzed and processed by the built-in algorithm, so as to obtain the final diagnosis result.
This article was written by Shaanxi Public Intelligent Technology Co., Ltd. Shaanxi Public Electric Co., Ltd.