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Working condition simulation test system and method for cascade converter sub-module

A converter system and working condition simulation technology, applied in the field of power electronics, can solve the problems of difficult to apply complex dynamic voltage and current stress, high safety requirements, and a large number of sub-modules, so as to improve the test efficiency and accuracy, The effect of flexible configuration and improved experimental efficiency

Active Publication Date: 2019-02-12
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a working condition simulation test system and test method for cascaded converter sub-modules, so as to solve the problem of high system voltage level of the existing cascaded converter sub-module test system and the required The number of modules is large, the system consumes a lot of energy, it is difficult to apply complex dynamic voltage and current stress, the configuration is inflexible, and the safety requirements are high.

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  • Working condition simulation test system and method for cascade converter sub-module
  • Working condition simulation test system and method for cascade converter sub-module
  • Working condition simulation test system and method for cascade converter sub-module

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Embodiment Construction

[0044] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0045] An embodiment of the present invention provides a working condition simulation and testing system for cascaded converter sub-modules. The cascaded converters that can be simulated include but are not limited to half-bridge and full-bridge modular multilevel converters (Modular Multilevel Converter, MMC) and cascaded H-bridge converter (Cascaded H-Bridge Converter, CHB). Through the current generator, electrical impedance network and corresponding voltage and current control methods, the sub-modul...

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Abstract

The invention provides a working condition simulation test system for a cascade converter sub-module. The working condition simulation test system comprises a current generator used for outputting a current, the to-be-tested sub-module used for receiving the current generated by the current generator and outputting a capacitor voltage signal, an electric impedance network used for controlling andfiltering the current output by the current generator, a current control system used for controlling a running state of each switching device in the current generator and adjusting the current outputby the current generator, a voltage control system used for driving on-off states of all the devices in the to-be-tested sub-module, and a cascade converter system model used for outputting the corresponding current and a voltage reference signal to the current control system and the voltage control system respectively. According to the test system, the simulation of the operation condition of anysub-module of a cascade converter can be realized, so that the test cost is saved, and the test efficiency and accuracy are improved.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a working condition simulation test system and a test method for cascaded converter sub-modules. Background technique [0002] At present, due to its unique structural characteristics, cascaded converters have been widely used and paid attention to in high-voltage and high-power applications. However, with the continuous improvement of the voltage level and capacity of the cascaded converter, the number of its sub-modules has also become extremely large. In order to ensure the reliable operation of the cascaded converter system, the verification and testing of its sub-modules becomes very important. [0003] In the traditional verification and testing of cascaded converter sub-modules, the voltage and current test conditions are often quite different from the actual working conditions. Usually, a relatively complete cascaded converter system must be built before sub-mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
CPCG01R31/003
Inventor 马柯杨云霄王卫耀蔡旭
Owner SHANGHAI JIAO TONG UNIV
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