Study on the Two-Stage Frequency Security Emergency Control Strategy for Multi-Infeed HVDC Receiving Systems

doi:10.11930/j.issn.1004-9649.2017.02.169.06

Abstract

Abstract: The steady increasing of HVDC transmission capacity increases, to some extent, the risks of frequency security in multi-infeed HVDC receiving systems. Based on an analysis of the typical characteristics of dynamic frequency caused by contingencies, a two-stage frequency security emergency control strategy is presented in view of the goal of frequency security control. The control strategy of first stage is determined according to the requirement of the lowest frequency during dynamic process after contingency. The control strategy of second stage is determined according to the requirement of the steady state frequency. Considering the characteristics of frequency security control resource in multi-infeed HVDC receiving systems, the paper addresses the problems in establishing two-stage frequency security emergency control strategy, and the basic principle, procedures and key information for establishing the control strategy are presented. Based on a real power grid, the effect of two-stage frequency security emergency control strategy is simulated. It is shown by this study that two-stage frequency security emergency control strategy can be used to coordinate the control requirements of the lowest frequency and the steady state frequency after contingency.

Key words: multi-infeed HVDC, frequency security, emergency control, receiving systems

CLC Number:

TM761

LI Bijun, LI Zhaowei, WU Xuelian, LIU Fusuo, LI Wei. Study on the Two-Stage Frequency Security Emergency Control Strategy for Multi-Infeed HVDC Receiving Systems[J]. Electric Power, 2017, 50(2): 169-174.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2017.02.169.06

https://www.electricpower.com.cn/EN/Y2017/V50/I2/169

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