Research on Reactive Power Coordination Control Strategy for Back to Back Hybrid-HVDC System

doi:10.11930/j.issn.1004-9649.2017.06.101.07

Abstract

Abstract: Low-load reactive power control function of conventional HVDC creates large firing angle or extinction angle of HVDC converter, which increases converter valve stress and power losses. Extinction angle backup control function of LCC-HVDC also leads to system status change and induce power fluctuations. In order to reduce those negative impacts, a reactive power coordinated control strategy for back to back hybrid-HVDC system based on Yunnan asynchronous interconnection project, using fast and precise reactive power control ability of MMC, is proposed. A electromagnetic transient model of Yunnan asynchronous interconnection project is build in PSCAD / EMTDC to verify effectiveness of proposed control strategy.

Key words: back to back hybrid-HVDC, Yunnan asynchronous interconnection project, reactive power coordination control, AC filter switching

CLC Number:

TM732

WANG Zhen, JIANG Bisong, YANG Zhizhong, GUO Chunyi, LI Jinwei, CHEN Huan, GUO Jianbao. Research on Reactive Power Coordination Control Strategy for Back to Back Hybrid-HVDC System[J]. Electric Power, 2017, 50(6): 101-107.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2017.06.101.07

https://www.electricpower.com.cn/EN/Y2017/V50/I6/101

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