"As tourist numbers surge during Shennongjia’s summer peak season, there is zero margin for error in power supply. As the grid’s 'emergency switch,' the auto-transfer device must remain in optimal condition," said Ying Zhao, on-site leader of the Secondary Protection Team at State Grid Shennongjia Power Supply Company on July 17.
Staff from State Grid Shennongjia Power Supply Company inspect equipment data at the power station
Photo by Gao Hongwei
That day, under scorching 38°C (100°F) heat, the Secondary Protection Team implemented safety measures and completed key maintenance tasks at the Yangri 110 kV Substation. These included calibrating 18 core parameters of the auto-transfer device and laying 500 meters of cable, covering five bays and two 110 kV lines. Each bay was tested using a simulated circuit breaker, and after three rounds of verification, the team ensured the system could respond within milliseconds to switch power paths seamlessly in case of extreme weather or sudden faults—safeguarding uninterrupted power supply.
Staff from State Grid Shennongjia Power Supply Company check the operational status of substation equipment
Photo by Gao Hongwei
Staff from State Grid Shennongjia Power Supply Company lay cables in 38°C heat
Photo by Gao Hongwei
The inspection has significantly enhanced the reliability of the auto-transfer device at the Yangri 110 kV Substation, serving as a critical safeguard for secure and stable grid operation. Looking ahead, State Grid Shennongjia Power Supply Company will continue to reinforce grid maintenance, dynamically monitor both load and weather conditions, and further strengthen its power supply defenses—ensuring a reliable electricity experience for both tourists and residents alike.
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