On December 27th, Xidian Power System, a subsidiary of China Xidian Group, successfully won the bid for two sets of medium-voltage DC transformers and one set of thyristor converter valves for DC distribution network in the demonstration project of “Key Technology and Application of Medium- and Low-voltage DC Distribution System” of the National Key Research and Development Program. Among them, the successful bidding of medium-voltage DC transformer, i.e. power electronic transformer, marks a major breakthrough for Xidian Power System in the field of DC distribution network scale-up project.

At present, with the access of large-scale distributed clean energy and diversified loads, the traditional AC distribution network has been unable to meet the requirements of diversified forms of power supply and multi-directional flow of energy, and its reliability and security are also facing many challenges. The hybrid distribution network with medium-voltage DC access and medium and low-voltage AC and DC ports has the advantages of flexible network organization, diverse operation modes, strong trend regulation capability, fewer power conversion stages, and full consumption of renewable energy to improve the operational efficiency of the whole system, which is one of the development directions of the future distribution network towards the road of intelligence. Therefore, the power electronic transformer that can realize the efficient access and consumption of distributed new energy generation equipment, energy storage equipment, AC and DC loads has a broad application prospect.

In order to develop power electronic transformer, Xidian Electric Power System organized a joint technical team, after technical seminars and exchanges, project program design, product development and testing, overcoming difficulties and obstacles, overcome technical problems, only took less than half a year to independently develop a successful ±10kVdc/±375Vdc/1MW DC power power transformer suitable for medium and low-voltage DC power distribution network, and adopted ACM-100 type control system with intellectual property rights, which can realize distributed new energy power generation equipment, energy storage equipment, efficient access and consumption of AC and DC loads. Intellectual property rights of the ACM-100 control and protection platform. The power electronic transformer overcame a number of technical difficulties such as half-bridge active voltage equalization, power module online casting, high-efficiency phase-shifting power module, high-frequency transformer design, and built a full-power operation test system; successfully passed the withstand-voltage test, no-load test, rated load test and other in-plant performance tests and third-party authoritative test inspection institutions to witness the test, and the various technical indexes satisfy the relevant requirements, and the comprehensive The technical indexes meet the relevant requirements, and the comprehensive technical indexes have reached the level.

The successful development of power electronic transformer of Xidian Power System and the realization of the project winning bid not only show the core competitiveness of China Xidian Group in the field of medium-voltage power electronic products, but also marks that China Xidian Group has the intellectual property rights control and protection platform, which will vigorously promote the development of medium-voltage power electronic industry of the Group, and make the Group take a step forward in the research, development and manufacturing of key equipment in the field of intelligent AC/DC power distribution network and ubiquitous power Internet of Things. This will strongly promote the development of power electronics industry in medium-voltage field of the Group, and make the Group take a solid step forward in the field of intelligent AC/DC power distribution grid and ubiquitous power Internet of Things (IoT).

On December 19, Xi’an Xidian Switchgear Electric Co., Ltd. of China Xidian Group Corporation (Xidian Electric for short) was awarded the bidding notification for the offshore booster station 252kV GIS and the onshore centralized control center 252kV GIS and its ancillary equipment of Three Gorges Fujian Changle Offshore Area A Offshore Wind Power Project. This project is a large-scale offshore wind power project under construction in China, and it is also the first time for China Xidian Group to win the bidding of offshore wind power GIS project, marking a new breakthrough for the company in the offshore wind power market.

Changle offshore offshore wind farm A project with a total installed capacity of 400,000 kilowatts, to build a single capacity of 6 megawatts and above offshore wind turbines, supporting the construction of a 220 kilovolt offshore booster station and an onshore centralized control center. The site wind energy resources, development and utilization of value, is currently far offshore distance in Fujian Province, deep water, construction difficulties, navigational conditions, complex offshore wind power project, Xikai Electric won the bidding for the project at sea, onshore a total of 11 intervals GIS, will help the national offshore wind power project continues to make new achievements.

Due to the high operation and maintenance cost of offshore wind power, the reliability and stability of the project puts forward higher requirements, so the user has high requirements on the equipment manufacturers have been put into operation performance, in the face of the fierce competition environment, Xikai Electric to rise to the challenge, and cumulatively looking for entry points, and finally stood out among many manufacturers, won the bid in one fell swoop.

Xikai Electric leadership attaches great importance to the offshore wind power project, in 2018 and the Three Gorges Group on the new situation of energy development, to jointly seize the great opportunities for the development of offshore wind power, to realize the Three Gorges Group “from the Yangtze River to the sea, do offshore wind power leader” to start a discussion. Together reached the realization of China’s offshore wind power from Fujian to the world” ambitious goal, through the top-level design, pointing out the direction of common development.

Xikai Electric has set up an offshore wind power project team, utilizing the advantages of Xidian platform enterprise to provide users with mature and perfect offshore wind power system overall solutions. The offshore wind power project off Changle adopts the modular offshore booster station design concept, this modular design scheme not only saves the time for users to install and commission on site, but also covers a small area, the whole booster station area is only more than 1,200 square meters; the platform adopts a number of prefabricated compartments layout type, GIS, transformers, medium voltage equipment and other electrical equipment is arranged in the prefabricated compartments with HVAC and fire fighting functions, making the weight of the platform superstructure greatly reduced, saving platform frames and foundations. The weight of the upper structure of the booster station platform is greatly reduced, which saves the cost of the platform frame and foundation, and features factory prefabrication, module compactness, short construction cycle, etc., and further realizes the goals of high reliability, maintenance-free and low investment of the equipment.

At present, Xikai Electric’s offshore wind power products have successfully passed the anti-corrosion test of domestic electrical enterprises, which is a grade anti-corrosion test completed by domestic electrical enterprises, the whole process of the test is supervised by the authoritative third-party organization, and the corresponding process procedures of the enterprise have been recognized by the third party; it has completed the design of the whole frame structure of large prefabricated module and successfully passed the verification, which meets all the requirements of the operation of offshore platforms, and it has the strength to It has the strength to provide safe and reliable offshore wind power equipment for customers.

Three Gorges Fujian Changle offshore A offshore wind power project is China Three Gorges Group and Fujian to build a world-scale offshore wind power base and offshore wind power equipment manufacturing industry base, the layout of the whole industry chain of offshore wind power major projects, the average annual feed-in tariff of 999,420,000 kilowatt-hours, the first time Xikai Electric won the bidding for the GIS offshore wind power project, laying a foundation for the “XD” brand to sail the sea. The first time Xikai Electric won the bidding of GIS offshore wind power project, laying a new starting point for “XD” brand to sail on the sea.

In the next 20 years, offshore wind power in the domestic market will continue to grow rapidly, and the country will continue to increase investment in offshore wind power. From 2019 to 2040, the average increase in investment will be $13 billion, and it is expected that 8% of the investment in electricity will be used for offshore wind power. Xikai Electric will always follow the national policy, and with the “Belt and Road” construction, to seize the great opportunity of offshore wind power development, and the user to build a leader in offshore wind power, in order to achieve the ambitious goal of “China’s offshore wind power from Fujian to the world, so that China’s equipment to the world! To realize the ambitious goal of “China’s offshore wind power from Fujian to the world, so that China’s equipment to the global” and work together.