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| Published：2021.07.10 News Sources：Qingdao Gute Ship Supplies Co., Ltd. Views： | |||
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Zhenhua Heavy Industry has built the world's largest offshore converter station for shipping
This is invested by the Yangtze river three gorges group co., LTD., the three gorges, China guangdong nuclear energy new energy holdings co., LTD. And Shanghai zhenhua heavy industries (group) co., LTD., teamed up to build the world's largest to date, Asia's first offshore converter station, after 16 months of construction land, for our country into the deep sea wind electricity development provides a solid technical support. Jiangsu Rudong Offshore (H6, H8, H10) wind power flexible direct current transmission project offshore converter station is the first ±400kV flexible direct current offshore transmission project in China. The offshore converter station is the key core equipment of offshore wind power direct current transmission, which is divided into three parts: foundation pile, jacket and upper module. The upper part is a seven-story building with a height of about 44 meters and a total weight of about 20,000 tons, making it the largest volume in China. The Rudong Offshore Converter Station in the Three Gorges is responsible for gathering 1,100 megawatts of electricity from three nearby wind farms (H6, H8 and H10) and converting it into directcurrent power with lower loss, which is then transmitted to land via Marine cables. It is China's first offshore wind power project with plus or minus 400kV flexible HVDC transmission. The transmission distance of HVDC cable is about 100km, which is the HVDC cable with the highest voltage grade and the longest transmission distance in China. After the project is put into operation, it will provide about 1.36 million households with annual electricity consumption, effectively contributing to the "3060" double carbon target. Liu said in his speech that the Three Gorges Rudong Marine Converting Station project has a very high social and economic value, and provides equipment support for the development and construction of the country's new energy industry and environmental protection. Zhenhua Heavy Industry is willing to work with all partners to grasp the development trend of new energy, give full play to its professional advantages, integrate multiple resources, and write a new and beautiful chapter for the development of the new energy industry in China. In his speech, Qian praised the company's brave and responsible spirit in the project. He said that the successful shipping of the offshore turbine station is not only a concrete action taken by Three Gorges Corporation and its partners to implement the carbon peak and carbon neutral goal proposed by General Secretary Xi Jinping, but also an important symbol to accelerate the development of China's offshore wind power industry. Fan Qiang said that China Classification Society, as one of the leading classification societies in the field of offshore engineering business, has accumulated rich engineering experience through a large number of project practices and established a sound technical standard system related to offshore wind power. China Classification Society is willing to cooperate with the industry to jointly build a safety chain for offshore wind power and contribute to building a "quality power" and "maritime power". Wang stressed in his speech that the offshore converter station project is of great significance for Nantong to build a 100 billion offshore wind power industry cluster with higher added value and stronger competitiveness. Nantong Municipal Government is willing to further strengthen cooperation with enterprises, provide the best environment and policies for the development of enterprises, and promote win-win cooperation in wind power and other fields. 
Customized solutions enable construction "Offshore converter station is the key core equipment of offshore wind power direct current transmission, which has no construction experience in China and is the first to be built in China." Zhenhua heavy industry offshore converter station project general manager Li Ruixiang said. The project for short cycle project, to promote the project on schedule, zhenhua heavy industries construction team planning ahead of time, many joint owner party construction scheme is discussed, and finally abandoned conventional one layer with the building construction strategy, innovative put forward "module carry, hierarchical structures" construction schemes, namely, carry out, the first layer to small fold two or three layer, and then assembled. "Through the reasonable division and combination of modules, not only can realize double-line construction and low-altitude operation, but also greatly improve the efficiency, and ensure the efficiency, integrity and economy of module carrying." Li Shuqing, executive manager of the Zhenhua Heavy Industry Offshore Converter Station project, said that the scheme has obvious advantages, but to achieve the ideal benefits, can not be achieved without careful and careful construction deployment. "It is like solving a Rubik's Cube. If you do something wrong, it could upend the plan and cause more trouble." 
Module "suit" streamlined construction There are two 3-storey valve halls in the offshore converter station, which are mainly equipped with a series of high-precision equipment -- converter valves. The total height of each valve hall is about 22.5 meters. These devices must be kept in constant temperature and humidity environment for a long time. "Compared with the outfield carrying, the hardcover inside the valve hall is more difficult, and the requirements for safe construction management are also higher." Project safety director Xu Jingjing said, if you want to have constant temperature and humidity conditions, must be installed in the walls of the silencing, heat insulation special film, which will involve a lot of construction scaffolding construction work. 
"100 meters red carpet" power sliding ship The Marine converter station is assembled in the back yard of Nantong Zhenhua reloading wharf, about 213.7 meters away from the front of the wharf. After boarding the ship, it still needs to slip 106.5 meters further. The project team of Zhenhua Heavy Industry Sea Service Group customized the "100-meter Red Carpet" -- 5 slide tracks for the converter station. After the final assembly tire frame is removed, the hydraulic windlanger traction and wire relay are used to help the converter station "walk" to the designated position at the front of the dock and successfully board the ship. "We were under a lot of pressure when we received the project." Zhenhua heavy industries sea service institute of maritime transport installation design department manager li said, the project team must be in a short time design scheme, the DSF and assembly and transportation integration and resolving a series of problems that may occur in the process of sliding, such as traction ability, sliding bearing, ships carrying process deviation, wharf, ship monitoring and ship, cargo ship after ship mooring wind, etc. 
At 8:48 PM on July 4, with the efforts of all the crew, the ship slid smoothly from the Rudong Marine Converter Station of the Three Gorges in the final 17 days. A follow-up shipment is scheduled for July 10 for the installation of the floating buoy at sea. When the Three Gorges Rudong Offshore Conversion Station arrives at the offshore wind power construction area, it will start the next stage of on-site installation and other construction operations. By then, Zhenhua Heavy Industry Offshore Service Group will adopt the first heavy-duty equipment installation method in China, carry out millimeter-level precise docking at sea, and realize the smooth transfer of ten thousand tons of load. |
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