Core Viewpoint - The successful completion of the major repair and hazard management work at the 110 kV Zhengning Substation marks a significant milestone for the State Grid Qingyang Power Supply Company, ensuring the safety and stability of the regional power grid by addressing all 15 key safety hazards by 2025 [1][3]. Group 1: Repair and Maintenance - The 110 kV Zhengning Substation is a critical hub for the southern Qingyang regional power grid, directly impacting industrial production and residential electricity supply reliability [3]. - The comprehensive repair task involved high-risk operations, including large special vehicle operations and high-pressure testing, necessitating meticulous planning and execution to ensure safety and quality [3][4]. - Preparatory work for the repair began a month in advance, involving multiple site inspections and coordination meetings to break down tasks into over 30 key control measures [3][4]. Group 2: Technical Capability Enhancement - The core task of the repair was the major overhaul of the main transformer’s disconnect switch, which included replacing four high-pressure bushings that did not meet explosion-proof requirements [4][5]. - The company has significantly improved its technical capabilities through independent exploration and technical breakthroughs, allowing it to conduct major repairs without relying on equipment manufacturers [4][5]. - The team innovatively decided to use new composite material bushings instead of traditional porcelain ones, enhancing the reliability of the main transformer and providing a reference for similar equipment hazard management [5]. Group 3: Workforce Development - The repair site serves as a training ground for young employees, fostering skill development through hands-on experience and mentorship from seasoned professionals [6]. - The "mentor-apprentice" model allows younger staff to learn practical skills and internal equipment structures, enhancing their understanding of operational principles and repair techniques [6]. - The comprehensive repair not only eliminated deep-seated equipment hazards but also rapidly improved the skills of the workforce, preparing them to tackle future challenges effectively [6]. Group 4: Future Plans - The company plans to continue deepening equipment hazard inspections and accelerate the upgrade of aging equipment to ensure stable electricity supply for local economic development and public safety [6].