Impact of Multi-HVDC Commutation Failure on Weak AC Section and Its Countermeasures

doi:10.11930/j.issn.1004-9649.2017.05.026.07

Abstract

Abstract: The transient imbalance energy accumulated by Multi-infeed HVDC (MIDC) commutation failure has impact on weak AC section and threaten power grid safety. It is necessary to study its characteristics and precautionary measures. In this paper, based on the typical grid structure in China, the impact characteristics of MIDC commutation failure on the weak AC section are simulated and analyzed with the characteristics of power fluctuation, continuity and simultaneity. From the view of safety control and planning, a series of countermeasures are put forward, such as pre-control measures of weak AC section and MIDC power, emergency control measures of taking initiative to HVDC pole blocking after a certain number of commutation failures and grid strengthening measures at weak AC cross-section. Simulation results verify validity of analysis and effectiveness of proposed measures. Research conclusions can provide reference for the actual operation of interconnected power network.

Key words: commutation failure, multi-infeed HVDC(MIDC), weak AC section, pre-control measures, DC active blocking, grid structure strengthening

CLC Number:

TM732

HU Xiaofei, CHEN Dezhi, ZHANG Yin, TANG Wei, YANG Cheng, WANG Jingjing, YUAN Sen. Impact of Multi-HVDC Commutation Failure on Weak AC Section and Its Countermeasures[J]. Electric Power, 2017, 50(5): 26-32.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2017.05.026.07

https://www.electricpower.com.cn/EN/Y2017/V50/I5/26

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