国网朔州供电公司：完成右玉威远站五级接地保护示范建设

Core Viewpoint - The establishment of the first "five-level grounding protection" demonstration area by the State Grid Shuozhou Power Supply Company marks a significant advancement in enhancing the rapid isolation and precise localization of grounding faults in substations [1][2]. Group 1: Five-Level Grounding Protection - The five-level grounding protection system enables quick isolation of grounding faults and precise reduction of fault scope through coordinated protection among various switches in the substation [1]. - The implementation of this system meets the requirements of the State Grid Corporation's "Distribution Network Technical Guidelines" for rapid isolation of permanent single-phase grounding faults [1]. - The demonstration area was successfully tested with various typical grounding fault scenarios, showcasing excellent performance in fault detection speed, localization accuracy, and isolation effectiveness [1]. Group 2: Demonstration Area Construction - The company adopted a "precision, meticulous, and lean" approach to advance the construction of the demonstration area, focusing on fire prevention urgency and equipment feasibility [2]. - Right County, with a vegetation coverage of 62% and classified as a key fire prevention area, was selected for the demonstration site, where 82% of the 10 kV lines cross forest areas [2]. - A detailed implementation plan was developed, ensuring compliance with key technical standards and conducting thorough assessments of existing automation terminal parameters and operational conditions [2]. Group 3: Future Plans - The company plans to continuously optimize the five-level grounding protection technology and gradually expand the coverage of the demonstration area [3]. - The goal is to establish a "fault second-level isolation" smart grid model, serving as a robust barrier for environmental protection in the region [3].