June 23, developed by the State Grid Smart Grid Research Institute based on crimp insulated gate bipolar transistor (IGBT) series voltage source converter valve operating stability at ± 10 kV voltage level, the switching frequency of 1050 Hz, System performance is good, the test is successful. This marks the second institute in the world to master the key technologies of crimp-type IGBT series inverters and the first to fully grasp the key technologies of module multilevel (MMC) and series inverters.
The direct series connection of IGBT devices simplifies the main circuit structure, reduces the control complexity and reduces the required components, thus making the device more compact and lighter. It is especially suitable for the environment, volume, weight, Maintenance and other demanding occasions.
Series converter technology is a worldwide problem. 90s of last century, the international community began a related study, but has been rarely breakthrough. State Grid Chi Institute of scientific research team bold innovation, comprehensive capture of this problem, the sample test results are good, mastered the crimp-type IGBT series-type converter valve core technology, breaking the foreign manufacturers in this area of ​​technology monopoly.
It is understood that the insulated gate bipolar transistor (IGBT) is used in flexible DC transmission and flexible AC power transmission of the core devices, and now mainly used IGBT series and module multi-level (MMC type) two technical routes. In the early stage, State Grid Chi Institute has mastered the key technologies of MMC-type converter and applied it in flexible DC transmission project.
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