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

摘要： 继电保护装置硬压板的正确投退是保障电网安全稳定运行的关键环节,针对传统人工巡检方式存在的效率低、易出错、无法实时监测等问题,基于国网冀北公司技术方案,提出了硬压板在线监测的系统性解决方案。文中重点研究了“双联压板”与“磁感应”2种技术路线的采集原理、系统架构及实施策略,构建了“采集-汇聚-站控-主站”的分层体系架构,阐述了硬压板状态信息基于DL/T 860标准统一建模,并通过多路径上送至新一代集控系统与继电保护信息主站的技术方案。应用实践证明,该方案能够实现硬压板状态的实时感知与远程监视,巡检效率大大提升,为二次设备操作防误、远程智能巡视等应用提供了可靠的数据基础,显著提升了变电站智能化运维水平。

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