模块化多电平换流器子模块故障模拟方法

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Abstract The control and protection device, as the key equipment to realize rapid protection in the operation and fault of flexible DC system,, needs to be fully tested before being put into operation. The existing method is based on a real-time simulation platform for controller-in-the-loop testing. However, this test method cannot simulate the physical structure of the sub-module in detail because the modular multilevel converter (MMC) sub-module adopts an equivalent modeling method, so it cannot effectively detect the failure of the sub-module. Simulation affects the comprehensive verification of the valve control function. In order to solve the above problems, this paper proposes a sub-module fault simulation technology, which is to add a fault simulation device to the existing test method, which can realize the sub-module fault simulation and make up for the defects of the existing test method. Finally, the joint test results in the laboratory prove its correctness and validity.

Key words： modular multilevel converter (MMC) real-time simulation platform sub-module hardware in the loop fault simulation

Received: 30 November 2021

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	ZOU Yijun
	WEI Mingyang

Cite this article:

ZOU Yijun,WEI Mingyang. Fault simulation method for sub-module in modular multilevel converter[J]. Electrical Engineering, 2022, 23(4): 96-101.

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http://dqjs.cesmedia.cn/EN/Y2022/V23/I4/96

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