In November 27th, under the arduous efforts of more than 120 construction workers, the 220kV Zhu Dong second technical renovation project, which is responsible for Meishan multi energy power construction limited liability company, was successfully completed, which is 15 days ahead of schedule. The technology transformation work is the first pilot project in the provincial company, replacing the original light steel reinforced aluminum strand to the heat-resistant aluminum alloy strands. Without changing the load of the original tower, the power transmission capacity can be increased 1.5 times.
It is understood that the West Sichuan section of Sichuan power grid is in heavy load condition for a long time, and the second line of 220kV Zhu Dong is one of the important transmission lines on this section. Since the line was built in the early 70s, the long term heavy load operation has lasted for nearly 40 years, and the conductor aging is serious and seriously choking. It can no longer meet the needs of the safe operation of the power grid.
According to the plan, from October 29th to December 15th, the technical transformation project changed from #111 tower to #156 tower LGJQ-300 light steel cored aluminum conductor to JNRLH60/LB14-300/25 aluminum clad steel core heat resisting aluminum alloy stranded wire, and replaced the corroded #134 tower -#151 tower overhead ground wire. At the same time, in order to meet the change of the wire and into the safety distance requirements of high speed, the 4 tower are increasing transformation.
Because this work is the first pilot project to replace heat-resistant wire in the provincial company, Meishan company and construction company attach great importance to it, send relevant technical personnel to the manufacturer to learn, ensure that the new process and new traverse technology transformation has theoretical guidance. Before the construction, the construction company line production technology department organize the construction team to the scene repeatedly checked on Expressway and electrified line and other important leap, special construction scheme optimization and repeated demonstration. In the construction, 120 construction workers were divided into two large groups and 8 teams at the same time. They were co operated and actively coordinated. They strictly followed the standardized operation procedures. According to the requirements of Xin'an regulation, they were the first to try out the new safety belt and working task list. During the construction period, the relevant departments of the Meishan company and the leadership of the construction company have been with the guidance of the scene many times to ensure the safe and smooth implementation of the work.
The transformation of the construction difficulty coefficient, spanning Chengle 1, 110KV line 1, 35kV line 5, 10kV line 35, low and several lines of communication. In order to reduce the power failure of users and improve the brand image of the company's high quality service, the way of live working with high difficulty and high risk is adopted when crossing multiple 10kV and above main lines in construction. Especially in the Crossing Expressway, high-speed road line and the skew angle is large, across a distance of more than 70 meters, in order to prevent the wire drop, the construction team on both sides of the road to set the pole 16 meters, adopted the old line line line crossing, the demolition of the old line, the successful completion of the work of the cross. During the construction period when the cold, in the face of abrupt drop in temperature, all construction personnel to overcome all difficulties, and quality to complete the task, safety.