An intelligent cross-connected box door for power cable partial discharge detection

At present, the detection of partial discharge in high voltage cables is mostly carried out at the cross interconnection position. For some cable defects, long-term continuous detection is required. Due to the need for external working power, the cross interconnection box door is opened, and the cross interconnection is in an exposed state. The inspectors must monitor and test at the same time. The implementation of the work is extremely inconvenient. For this reason, this article designed an intelligent cross-connected box door and applied it in the power supply cable of Shanghai Hongqiao demonstration zone. The intelligent cross-connected box door comes with a partial discharge sensor, an automatic data acquisition and storage system and a large-capacity battery, which can seamlessly replace the current cross-connected box door to achieve plug-and-play partial discharge detection. After starting, it does not need to be concerned and no inspection personnel are required. Monitoring, self-sustaining power not less than 7 days, can significantly improve the efficiency and safety of the existing high-voltage cable partial discharge detection implementation.