Study on Control Strategy of Back to Back MMC-HVDC Connecting Chongqing and Hubei Power Grid

doi:10.11930/j.issn.1004-9649.201804111

Abstract

Abstract: The construction of back to back MMC-HVDC connecting Chongqing and Hubei Power Grid has put forward higher requirements for the dynamic control capability of large-scale power grids. This paper first introduces the system structure of the project. After studying the basic MMC-HVDC control strategy, considering the demand of the actual project for the control effect on the system operation, this paper proposes a new double-loop control strategy based on the traditional power control, in which the limit of the voltage deviation is added. At the same time, the fault crossing logic of MMC-HVDC under severe AC faults is introduced. The simulation process combining control strategy and MMC-HVDC operating zone is also provided. Finally, The PSD-PSModel is used to simulate the Chongqing-Hubei system. The results verify the effectiveness and correctness of the proposed control strategy for large-scale networked projects.

Key words: fault ride through, hybrid simulation, MMC, over-limit control, power electronics control

CLC Number:

TM76

FAN Yunlong, REN Jianwen, YE Xiaohui, LI Xia. Study on Control Strategy of Back to Back MMC-HVDC Connecting Chongqing and Hubei Power Grid[J]. Electric Power, 2019, 52(4): 96-103.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201804111

https://www.electricpower.com.cn/EN/Y2019/V52/I4/96

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