[China Instrument Network Instrument R&D] Recently, the “Key Technology Research on New Insulator Strings for UHV AC Lines†and “Study on Performance Testing and Evaluation Technology of Key Raw Materials, Components, and Monitoring Devices for UHV Power Equipment†led by China Electric Power Research Institute The project was accepted by the company's Ministry of Science and Technology
Map from the network
The project “Study on the testing and evaluation of key raw materials, components and monitoring equipment performance of UHV equipment†combined with the operational requirements of UHV equipment, proposed a method for evaluating the performance of key raw materials and components of UHV transformers, and combined them under complex operating conditions. The special tests established a multi-level index system for evaluating the performance of key raw materials and components of UHV transformers;
The project established a quality inspection system for basin insulators and insulated tie rods for UHV GIS, and provided a combination of hardware and software for GIS on-site partial discharge detection anti-jamming measures; the project designed a long-term electrification assessment of UHV power plant condition monitoring devices. The indicator proposes a comprehensive evaluation model based on improved analytic hierarchy process and multi-level extension to effectively solve the problem of inconsistent evaluation caused by multi-level indicators in the evaluation of device performance; The application strategy of the dissolved gas monitoring device in high-voltage transformer oil developed a mobile detection platform for the dissolved gas monitoring device in oil and designed a laboratory-comparison testing method, which helps to improve the UHV transformer oil in the laboratory and field environments. Dissolved gas analysis accuracy. The project's performance testing and evaluation system for key raw materials, components, and monitoring devices for UHV equipment can intervene in quality control from upstream of UHV equipment and enhance the operational reliability of UHV equipment from the source to ensure the safety of UHV equipment. Stable operation is of great significance.
For the first time, the “Key Technology Research for New Insulator Strings of UHV AC Lines†project has optimized the string type and fitting configuration, the tower discharge characteristics test, and the insulator string for Y-strings, inverted V-strings, and porcelain-composite insulator combinations of UHV AC lines. Three types of electric field distribution and corona voltage characteristics were obtained through research on pollution, ice flashover characteristics, and insulator string mechanical properties. The long-wavefront operating shocks of 1000μs and 2500μs in Y-series and inverted-V tower head gaps were obtained. And lightning impulse voltage discharge characteristics, and pollution resistance characteristics, ice flashover characteristics, mechanical properties and tower load characteristics, proposed UHV AC line Y type string, inverted V type string and porcelain - composite insulator combination of three new types of strings String and tower structure type complete set of technical solutions. The research results of the project provide important technical support for the string structure and pole tower design of UHV AC lines in China. It has important practical value for reducing the cost of the line body and reducing the area occupied by the transmission corridor. Among them, the UHV AC new Y-type string related results have been applied to the design of the Y-shaped string tower in the UHV AC project in Huainan-Shanghai, China, which has produced good economic and social benefits.
(Original title: "Study on Key Technologies of New Insulator Strings for UHV AC Lines" The two company's science and technology projects passed the acceptance)