Recently, China XD Group Baoguang shares of good news, led by the Chinese Academy of Electric Sciences, Baoguang shares and other units jointly developed by China's first fully independent intellectual property rights of ± 800 kV UHV converter vacuum on-load tap-changer to complete all the type tests, the key technical indicators to reach the international leading level, and successfully realize the whole industry chain of UHV converter independent and controllable.
As one of the key core equipments of the UHV DC transmission project, the smooth and reliable operation of the on-load tap-changer determines the effective operation of the project, which in turn relies on the stability and reliability of the vacuum interrupter for the on-load tap-changer. As the heart of the on-load tap-changer, the vacuum interrupter for the on-load tap-changer is responsible for the switching of high currents and has an electrical life of 360,000 cycles and a mechanical life of 1.5 million cycles. The on-load tap-changer and the supporting vacuum interrupter are high-precision mechatronic products, on which China has long relied on imports, and the development of a more reliable localized on-load tap-changer is imminent.
For this reason, Baoguang Corporation has been focusing on the localization of vacuum interrupters for high-reliability on-load tap-changers. The project team aims at the goal of localization and adopts the innovation mode of "relying on engineering, industry-academia-research-use association, and multi-professional synergy" to carry out scientific research and study in the areas of performance enhancement, prototype development, testing and evaluation, engineering application, and construction of a standardized system. Scientific research. The team gave full play to the technical expertise in the field of vacuum interrupter, and overcame the problems of design, manufacturing, testing and reliable application, as well as the electromechanical matching between the contact bounce and the speed of mechanism action, which greatly improved the arc extinguishing reliability of the vacuum interrupter.
At present, the results of this project have officially passed the "military order" milestone assessment organized by the Ministry of Industry and Information Technology (MIIT), marking that China's self-developed on-load tap-changer has completed the authoritative testing prior to engineering application.
The successful passing of this type test once again proves the reliability and stability of China Xidian Group's vacuum interrupter products. As a next step, the company will accelerate the enhancement of industrialized processing and manufacturing capabilities, and push forward the demonstration and application of domestically produced on-load tap-changers for extra-high-voltage converter transformers as soon as possible to achieve engineering demonstration, so as to provide powerful support for China's high-end electric power equipment.