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1000kV UHV AC transformer casing world's first type test
Main research institutes: Wuhan Branch of China Electric Power Research Institute
Main Researcher: Chen Jiangbo Wu Zhirong Yin Jing Cai Shengwei Shao Jie Feng Guo Huihao Li Hui Xu Jing Zhou Cuijuan Wu Shipei He Yan
1000kV UHV AC transmission project is the highest voltage level transmission and transformation project in China and even in the world. It has the advantages of long distance, large capacity and low loss. It plays an important role in optimizing the energy allocation in our country and plays an important role in power grid technology development in China and even in the world And power grid construction will also have a significant and far-reaching impact. UHV AC transformers and bushings are the core equipment of the project. The factory test and on-site handover test have reached the limit of the world's test capability. The test abroad can not be carried out in strict accordance with the standards. The success of the test is directly related to the success or failure of the project.
In order to solve this world-wide technical problem, State Grid Corporation organized a series of special scientific research projects in the field of high voltage. Chen Jiangbo, Wuhan Branch of China Electric Power Research Institute, led the research team to meet the technical challenges of partial discharge monitoring of low potential and high field strength areas of UHV AC power transformers and casing corona elimination, and successfully completed the UHV AC power transformers and sets Tube special test, the scientific and technological achievements in Hubei Province Science and Technology Department identified as the overall reached the international advanced level.
The key technologies and innovations of this achievement are as follows: The key test equipment for UHV AC bushings was developed and the test system to meet the type test requirements of UHV AC bushings was developed. Developed the world's first 1600kV standard capacitors and developed a test system to meet the type test requirements of UHV AC transformers. The dielectric loss angle measurement test and UHV AC bushing test at the full voltage (1100kV) were completed in the world for the first time. Discharge test. The innovation of partial discharge test method of UHV AC transformer bushing was realized. The "partial balance measurement method" was put forward to measure the partial discharge of casing. The local discharge capacity of UHV AC transformer casing can be controlled within 2 ~ 3pC, which improves the test accuracy remarkably. It has realized the innovation of partial discharge test method and test equipment for UHV AC power transformers. The partial discharge model of UHV AC voltage transformer was established. The experiment scheme of multi-point monitoring of acousto-electric coupling and the special technical measures of anti-interference were put forward. The partial discharge monitoring, positioning and casing corona elimination of UHV AC low voltage field were solved And other technical problems. Developed with a number of measurement while monitoring, recording, playback signal partial discharge measurement equipment.
Project research team to adopt the technical achievements in the world for the first time completed a full set of UHV AC transformer casing type test. State Grid Corporation of China successfully completed the field discharge test of the world's first 1000kV AC UHV transformer and ± 800kV DC UHVDC converter transformer using this technology. In addition, the technical achievements have been widely used in the factory test of UHV AC transformers and reactors.
This technology has been applied in the 1000kV UHV AC pilot demonstration project in Jindongnan-Nanyang-Jingmen, the 1000kV UHV AC power transmission project from Anhui to East and the 1000kV UHV AC power transmission project in Northern Zhejiang-Fuzhou Good results, to ensure that the UHV AC voltage transformer project of the core equipment put into operation a success.
The technical achievements of 5 patents, the formation of an international standard, a national standard, a national grid company standard 1; obtained including the National Energy Award, China Electrotechnical Technology Award, Power Construction Award, State Grid Corporation of Science and Technology Progress Award Awards; direct economic benefits of up to 52 million yuan, with the follow-up of UHV AC project after another construction, the technology will create greater economic benefits.
The technology to fill gaps at home and abroad, so that China's high-pressure test capability to reach the world's leading level. It plays a key role in mastering UHV transformer technology in our country and improves the overall level of China's electrical equipment manufacturing industry. The technology guides the UHV AC transformer and casing factory test and field handover test and other important aspects of UHV construction, to ensure project put into operation, the long-term safe and stable operation of power grid is of great significance.
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