基于实时数字仿真器的模块化多电平换流器内部故障混合仿真模型

doi:10.19595/j.cnki.1000-6753.tces.180646

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Abstract A large number of series-connected submodules in a high-voltage modular multilevel converter (MMC) system introduce a great challenge for real-time simulation. Though the simulation efficiency of the MMC model can be improved by encapsulating equivalent model of the bridge arm or the converter, the internal fault of the converter fails to be simulated by using existing encapsulated equivalent model. Compared with off-line simulation tool, the interpolation calculation method cannot be utilized in real-time digital simulator (RTDS), it is more difficult to simulate power electronic devices, and has higher requirements on calculation speed and efficiency. To enhance the calculation effectiveness while keeping the precision under various fault situation, a hybrid simulation model of MMC arm combining the detailed and simplified equivalent models is proposed, which is implemented by utilizing CBuilder in RTDS. The proposed model can be conveniently used to simulate various internal faults of converters, bridge arms, and submodules with real-time calculation. The calculation precision and effectiveness of the proposed model are verified in RTDS.

Key words： Modular multilevel converter real-time digital simulation hybrid simulation model of bridge arm simulation of fault

Received: 17 April 2018 Published: 26 September 2019

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TM743

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	Wang Jiecong
	Liu Chongru
	Xu Dongxu
	Zhu Yi

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Wang Jiecong,Liu Chongru,Xu Dongxu等. Hybrid Simulation Model of Modular Multilevel Converter Internal Fault Based on Real-Time Digital Simulator[J]. Transactions of China Electrotechnical Society, 2019, 34(18): 3831-3842.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.180646 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I18/3831

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