A crimping type igbt series modular voltage source converter and its control method

Abstract

The present invention provides a pressure connection type IGBT series modular voltage source converter and its control method, a first SM module, a second SM module and a control module; the first SM module and the second SM module are connected in series; the Both the first SM module and the second SM module include n sub-sm modules connected in series; the control module is a time control module, which is used to control the on-off of the sub-sm modules. The control method includes controlling the inputs of different numbers of sub-sm modules to rapidly charge all sub-sm modules in turn. The technical solution provided by the present invention can make all the sub-modules of the converter work at the voltage level required for engineering applications at a lower input voltage, so as to verify whether the converter meets the requirements in practical applications, greatly reducing the test cost , and improve the safety of the test; the invention is reasonable in design and convenient to use.

Description

technical field [0001] The invention belongs to the technical field of feeder electric automatic testing, and in particular relates to a crimping type IGBT series modular voltage source converter and a control method thereof. Background technique [0002] Due to its superior performance, the crimp-type IGBT is more and more widely used in power electronic equipment, and its position in the power system is also becoming more and more important. In high-power applications, a single ordinary crimping type IGBT can no longer meet the voltage requirements, and the price of high-voltage IGBTs is relatively high. The series connection of crimping IGBTs can greatly increase the voltage level, and the cost is low and the performance is good, so it is favored by more and more people. . With the development of flexible DC transmission system, the crimping IGBT series modular voltage source converter is a research hotspot. [0003] The voltage level of the pressure-connected IGBT seri...

AI Technical Summary

Problems solved by technology

[0003] The voltage level of the pressure-connected IGBT series modular voltage source converter is getting higher and higher. In the test stage, a higher actual DC input voltage needs to be input, resulting in higher test costs and lower safety.

Often due to the limitation of test conditions, the actual DC input voltage of the converter cannot be satisfied, resulting in the inability to fully verify the converter

The usual practice is to improve the test conditions and increase the voltage output capability, but it will consume a lot of time and financial resources, and miss excellent market opportunities

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