中国电力 ›› 2017, Vol. 50 ›› Issue (5): 26-32.DOI: 10.11930/j.issn.1004-9649.2017.05.026.07

• 安全专栏 • 上一篇    下一篇

多直流换相失败对弱交流断面的冲击特性及应对措施

胡晓飞1, 陈得治2, 张垠3, 汤伟1, 杨铖1, 王京景1, 袁森4   

  1. 1. 国网安徽省电力公司,安徽 合肥 230061;
    2. 中国电力科学研究院,北京 100192;
    3. 国网上海市电力公司,上海 200437;
    4. 华北电力大学,河北 保定 071003
  • 收稿日期:2017-01-17 出版日期:2017-05-20 发布日期:2017-05-26
  • 作者简介:胡晓飞(1961—),男,安徽芜湖人,高级工程师,从事电力系统调度运行管理工作。E-mail:huxf201x@ah.sgcc.com.cn
  • 基金资助:
    国家电网公司科技项目资助(多交流特高压通道强耦合大受端电网稳定控制及系统保护方案研究)(XT71-16-043)

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

HU Xiaofei1, CHEN Dezhi2, ZHANG Yin3, TANG Wei1, YANG Cheng1, WANG Jingjing1, YUAN Sen4   

  1. 1. State Grid Anhui Electric Power Company, Hefei 230061, China;
    2. China Electric Power Research Institute, Beijing 100192, China;
    3. State Grid Shanghai Electric Power Company, Shanghai 200437, China;
    4. North China Electric Power University, Baoding 071003, China
  • Received:2017-01-17 Online:2017-05-20 Published:2017-05-26
  • Supported by:
    This work is supported by Science and Technology Project of State Grid Corporation of China (Research on Stable Control and System Protection Scheme for the Large Receiver-side Power Grid of Multi-AC UHV Channel Strong Coupling) (No. XT71-16-043).

摘要: 多直流换相失败累积的暂态不平衡能量对弱交流断面造成一定冲击,进而威胁电网安全,需要研究其特性及防范措施。依托中国实际典型网架格局,计及多直流换相失败的功率波动性、连续性、同时性等特征,仿真分析了换相失败对弱交流断面的冲击特性,并从安控以及规划角度提出了多种应对措施:弱交流断面与多直流的功率预控措施,换相失败达到一定次数后主动闭锁直流的紧急控制措施以及弱交流断面的网架强化措施等,仿真验证了特性规律的正确性和措施的有效性。研究结论可为互联电网实际运行提供参考。

关键词: 换相失败, 多直流馈入, 弱交流断面, 预控措施, 直流主动闭锁, 网架强化

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

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