On January 15, 2018, the fans of Phase 1# and Phase 5 24# were withdrawn successively due to the damage of the ring main unit. In operation, because there are no spare parts on site, the company leaders urgently purchased two RMUs from Shenzhen Ormazabal manufacturers and sent them to the site. In order to reduce the power loss of the unit as much as possible, the on-site personnel of Masan actively communicated with the freight company. After the spare parts arrived at the Yanchi freight center in the early morning of the 24th, they took the initiative to drive to Yanchi to pick up the goods by themselves, which greatly reduced logistics distribution, packing and transportation. time, the spare parts will be transported to the site one day in advance. The spare parts arrived at 4:30 pm. In order to resume the operation of the unit in advance, the site decided to start the replacement work immediately and repair it overnight.
This repair work involves equipment hoisting, cable head production, transformer inspection, cable withstand voltage test, and ring network cabinet removal Various tasks, such as installation and protection value testing, are complex tasks and extensive coordination. It coincides with the continuous snowfall in the Mahuang Mountain area that day, and the outdoor temperature at night is close to minus 20 ℃. In addition, the lack of lighting at night adds to the repair work. Not a little difficult. However, all the staff who participated in the emergency repairs had firm confidence, no complaints, and actively devoted themselves to the work.
In view of the characteristics of this work involving a wide range of operations, a large cross-operation scope, equipment brand replacement, and high replacement difficulty, special Invite the line maintenance center, Masan operation, Ormazabal manufacturers and other technical personnel to participate in the implementation. In order to ensure that the replacement work is carried out safely, smoothly and quickly, the on-site personnel are divided into two groups, and two ring network cabinets are replaced at the same time. All work is in progress step by step. In the freezing cold of minus 20°C, everyone was not constrained by the cold air, but worked harder and harder. Many people even endured hunger. After simply satisfying their hunger, they continued to devote themselves to intense work. Due to the serious lack of on-site lighting at night, the maintenance team used mobile phones, flashlights, generators and other equipment to build a temporary lighting system. With the joint efforts and close cooperation of all maintenance personnel, the fifth-phase 24# fan completed the replacement of the ring main unit in the early morning of the 25th, and successfully resumed power transmission and grid-connected operation. The 1# fan of the first phase completed the replacement of the ring main unit at 3:00 on the 25th. After power transmission, the unit failed to connect to the grid due to the alarm and communication failure of the unit. The maintenance personnel were not discouraged by this, and continued to climb the tower for troubleshooting. Finally, on the 25th At 20:00 at night, after eliminating the fault point, it will be connected to the grid and run smoothly.
The emergency repair work took 15 hours from the spare parts admission to the completion of the replacement of the two RMUs. During this period, the staff were not afraid of the severe cold, stayed up all night, and devoted themselves to their jobs. All departments are conscientious and responsible, cooperate closely, and strive for excellence. During the whole maintenance process, everyone actively offered ideas and suggestions, which demonstrated the cohesion and team spirit among the fan maintenance team, the line maintenance team, and the operation team.
