At 17:36 on the evening of June 11, the series voltage source converter valve based on the crimp-type IGBT developed by State Grid Smart Grid Research Institute was operated stably at a voltage level of ± 10 kV with a switching frequency of 1050 Hz. The system performance Good, successful test, marking the unit to become the world's second master crimp-type IGBT converter in series converter key technology, the world's first full grasp of MMC and series converter key technology research institutes. Series converter technology is a worldwide problem. Since the 90s of the last century, a large number of universities, research institutes and companies in the world started the research on IGBT tandem technology, but few breakthroughs have been made. Only one ABB company has mastered the technology. The world has been put into operation in most of the flexible DC transmission project using series converter technology, if we can break through the monopoly of technology, will undoubtedly promote a new generation of converter to a higher voltage level, more capacity, more Compact, higher economic and technical performance. In the face of unprecedented technical challenges and risks, after years of hard work, State Grid Institute of Intelligent Power Research Institute of Electronics with a solid theoretical foundation and rich experience in engineering efforts to explore and make bold innovations in IGBT series voltage sharing technology, control and protection Technology and other aspects of a comprehensive innovation and optimization, overcome the IGBT series in this worldwide problem. The test result proves that in the test environment of high-voltage, high-frequency and strong electromagnetic interference, the world's first full-analog-based drive protection circuit developed completely by the team has good disturbance immunity and sensitive and stable protection capability Developed tandem valve to 20 kV voltage level. The success of the trial means that Sinomonte Research Institute has broken ABB's exclusive technology monopoly in this field and taken another solid step toward the "China Dream" of high-end equipment in the power grid. It has also taken a solid step for the State Grid Corporation "Global Energy Internet" , "One special three" and other strategic ideas to provide a strong technical reserves and technical support. Background: Insulated Gate Bipolar Transistor (IGBT) is a core device used in flexible DC transmission and flexible AC transmission. Due to the manufacturing level of the semiconductor device industry, IGBT device single tube with low withstand voltage, and power system applications with high voltage, large capacity of the special requirements, so now mainly IGBT series and module multi-level (MMC type) two Technical route. Direct series IGBT devices will greatly simplify the structure of the main circuit, a substantial reduction in control complexity, the required components greatly reduced, making the device more compact and lighter, especially for offshore wind power access, large-scale urban transformation of the power grid Environment, size, weight, maintenance and other demanding occasions. Boiler Accessories Economiser,Economiser Of Boiler,Economizer On Boiler,An Economiser In A Boiler Jinan Yuanda Power Equipment Co.,Ltd. , https://www.ydboilerpart.com