At 0:45 on September 25, the 1,000 kV main transformer No. 1 of the UHV Wuhan converter substation of State Grid Hubei DC Company successfully transmitted power, kicking off the first annual maintenance of the receiving end station of the Jingmen to Wuhan UHV AC power transmission and transformation project.-The "first shot".
It is reported that this maintenance is the first large-scale maintenance since the station’s 1,000 kV UHV AC equipment was put into operation, and it is also the first UHV maintenance in Hubei since the beginning of autumn. To this end, State Grid Hubei DC Co., Ltd. deployed in advance and carefully organized, and arranged relevant personnel to coordinate on-site maintenance problems as soon as possible to ensure that power outage maintenance tasks were completed safely and orderly during the maintenance period, and to prevent grid operation risks.
"Cheng Shu and Tong Wencong are responsible for the acceptance of the No. 1 main transformer, Hou Longyu and Du Guoan are responsible for the acceptance of the power consumption of the station and the 110 kV low-capacity and low-resistance area, and Ma Xingyu and He Chang are responsible for the acceptance of the No. 1 main transformer fire protection system." September 24 On the same day, Wu Lianshun, the shift leader after taking over, began to arrange the work in an orderly manner. The operation and maintenance personnel at the maintenance site took the pre-operation inspection list and carefully checked the appearance of the equipment, switch status, valve status, SF6 pressure, etc. on site to prepare for acceptance before power transmission.
Station director Hu Yuyang introduced that this maintenance work includes the first inspection of the 1,000 kV main transformer No. 1, the 110 kV low-capacity, low-resistance, station transformer and 110 kV branch busbars connected under the No. 1 main transformer. It is the first part of the annual maintenance of the 1000 kV AC system of the UHV Wuhan converter substation in 2023. Maintenance involves routine maintenance projects, special maintenance, defect elimination, technical transformation, technical supervision and other projects, and is carried out collaboratively by multiple majors such as operation and maintenance, maintenance, testing, and protection. "This inspection has many cross-cutting operations, tight time, and heavy tasks. The DC company organized a first inspection work coordination meeting in advance to strictly review the inspection work plan, and implemented various operation and maintenance guarantees and on-site management and control work in accordance with the requirements to ensure the autumn inspection work completely completed.”
According to the arrangement, the annual maintenance work period of the 1,000 kV AC system of the UHV Wuhan Converter Substation is divided into two stages: September 21 to October 4, and October 23 to November 6. After the first phase of maintenance is completed, State Grid Hubei DC Co., Ltd. will make arrangements for the second phase of maintenance in advance, pay close attention to on-site safety management and control, and build a solid autumn inspection safety protection network for the Mid-Autumn Festival and National Day "double festivals" and the winter peak. Lay a solid foundation for ensuring power supply.