关键词: 继电保护, 在线监测, 双联压板, 磁感应, 状态感知, 智能运维

Abstract: The correct activation and deactivation of hard pressure plates in relay protection devices is a crucial aspect of ensuring the safe and stable operation of the power grid. Addressing the issues of low efficiency, error-prone manual inspection, and inability to monitor in real-time associated with traditional manual inspection methods, a systematic solution for online monitoring of hard pressure plates has been proposed based on the technical plan of State Grid Jibei Electric Power Company. The research focuses on the acquisition principles, system architecture, and implementation strategies of two technical routes: “dual pressure plate” and “magnetic induction”. A hierarchical system architecture of “acquisition-aggregation-station control-master station” has been constructed. The technical solution is elaborated, which involves unified modeling of hard pressure plate status information based on the DL/T 860 standard and uploading it to the new generation of centralized control system and relay protection information master station through multiple paths. Application practice has proven that this solution can achieve real-time perception and remote monitoring of hard pressure plate status, significantly improving inspection efficiency. It provides a solid data foundation for applications such as error prevention in secondary equipment operation and remote intelligent inspection, significantly enhancing the level of intelligent operation and maintenance of substations.

Key words: relay protection, online monitoring, dual pressure plate, magnetic induction, state awareness, intelligent operations and maintenance