Government News
Huainan-Shanghai UHV AC Demonstration Project operating safely for 4,000 days 2024-09-11
Staff members conduct a specialized inspection of equipment operating under high temperatures at the UHV Huainan Station.
As of Sept 7, the "Eastward Transmission of Electricity from Anhui" Huainan-Shanghai UHV AC Demonstration Project has been operating safely for 4,000 days.
On Sept 25, 2013, the world's first commercial UHV AC transmission project with dual circuits on the same tower—the Anhui to East Power Transmission Demonstration Project from Huainan to Shanghai—was officially commissioned. It was entirely designed, manufactured, and constructed independently by China. The "Huaihe Line" is a critical component of the East China UHV network's main grid structure, linking the Anhui coal power base with the East China Grid's load center, and serving as a vital pathway for the Anhui Grid's electrical energy transmission. Wuhu Station serves as the core hub in the East China regional UHV grid's energy channel, handling the energy transmission responsibilities of the half from Jiquan DC and two-thirds from the Anhui to East Power Transmission, thereby playing a significant role in optimizing regional energy distribution.
Staff members conduct a special inspection of the post-snow equipment to ensure timely monitoring of the equipment's operational status at the UHV Huainan Station.
For 11 years, State Grid Anhui Extra High Voltage Company has been steadily advancing lean operation and maintenance, guided by the philosophy of "refined management enhancement". Huainan Station has pioneered digital transformation and upgrade, actively advancing "human-machine collaboration", completing an online intelligent inspection system for substations, and working to achieve comprehensive panoramic control and intelligent inspection through a three-dimensional inspection system comprising "high-definition video, online monitoring, inspection robots, drones, and indoor track-mounted robots". Since 2020, Wuhu Station has successively completed the renovation of 14 of 1,000 kV casing pipes, 24 of 1,000 kV GIS circuit breakers, 63 of 1,000 kV GIS knife switches and other major equipment safety hazards in the station, improving the healthy operation level of the first set of AC UHV equipment.
Staff members of State Grid Anhui Extra High Voltage Company carry out equipment maintenance at the UHV Wuhu Station.
During this summer's peak load period, the Wuhu Station's Hu'an double-line reached a record-breaking maximum load of 8.9 million kilowatts. Huainan Station dispatched a peak total load of 5.59 million kilowatts, with a single main transformer's maximum load reaching 1.71 million kilowatts. Amid the challenges posed by high temperatures, heavy loads, and severe convective weather, the two ultra-high voltage (UHV) stations meticulously devised a power supply enhancement plan for peak load periods. They consistently enhanced the operational and maintenance support for their equipment. Beyond routine human-machine inspections and specialized checks on critical equipment, they employed various methods like manual open-box inspections, infrared defect tracking, and drone inspections to ensure all-encompassing health monitoring of their equipment. This proactive approach enabled them to promptly identify and swiftly address multiple malfunctions, thereby ensuring the power grid's secure and stable operation during the peak load period.
Source: China Daily
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