多馈入直流换相失败与同步电网交互影响机理研究评述  

Review on the Mechanism of the Interaction Between Multi-infeed HVDC Commutation Failure and Synchronous Grid

作　　者：薛峰[1,2] 彭慧敏 王玉[1,2] 薛禹胜 刘庆龙[1,2] XUE Feng;PENG Huimin;WANG Yu;XUE Yusheng;LIU Qingong(Nari Technology CO.,Ltd.,Nanjing 211106,China;Nari Group Corporation/State Grid Electric Power Research Institute,Nanjing 211106,China)

机构地区：[1]国电南瑞科技股份有限公司,南京211106 [2]南瑞集团有限公司(国网电力科学研究院),南京211106

出　　处：《高电压技术》2024年第7期2747-2759,共13页High Voltage Engineering

基　　金：国家重点研发计划(2021YFB2400900)。

摘　　要：换相失败场景下交直流交互影响机理是多馈入直流系统安全稳定控制决策前提。从直流换相失败分类及机理、换相失败影响因素、换相失败评价指标及风险评估4个方面梳理了换相失败与同步电网交互影响机理研究现状,并从直-交、交-直两个角度分析了交直流电网的交互影响,最后介绍了基于受扰轨迹知识提取的交直流系统量化分析方法及应用现状,实例分析单直流换相安全评估方法推广至多直流连续换相失败的可行性,指出基于关断角受扰轨迹提取的量化分析方法能实现多馈入直流换相安全量化评估和换相安全性与系统稳定性的交互影响分析,后续应该理论分析多馈入直流换相失败场景下电压和频率跌落可接受性量化评估的适应性,在多维量化指标空间内,深入探讨同步电网多时间尺度复杂动态响应对多馈入直流换相安全的影响规律,揭示多馈入直流换相失败与同步电网动态响应相互作用机理。The mechanism of AC-DC interaction is the premise of security and stability control decision of multi-infeed DC system under commutation failure.We review the research status of the interaction mechanism between commutation failure and synchronous power grid from following four aspects:the classification and mechanism of commutation failure,influencing factors of commutation failure,evaluation indexes of commutation failure,and risk assessment,and analyze the interaction influence of AC/DC power grid from the perspectives of DC-AC and AC-DC.Finally,the quantitative analysis method of AC-DC system based on trajectory dynamics and its application status are introduced.The feasibility of extending the commutation safety assessment method from single-HVDC systems to multi-infeed HVDC systems con-tinuous commutation failure is analyzed with an example,and the key technical problems that should be solved in the follow-up study on the interaction mechanism between multi-infeed HVDC commutation failure and synchronous grid dynamic response are pointed out.The quantitative analysis method based on the extraction of the disturbance extinction angle trajectories can achieve quantitative evaluation of multi-infeed DC commutation safety and the interaction analysis between commutation safety and system stability.Subsequently,the adaptability of quantitative evaluation of voltage and frequency drop acceptability in multi-infeed DC commutation failure scenarios should be analyzed theoretically.In the multi-dimensional quantitative indicator space,the impact of complex dynamic responses at multiple time scales in syn-chronous power grids on the safety of multi-infeed DC commutation is investigated in detail,and the interaction mechanism between multi-infeed DC commutation failure and synchronous power grid dynamic response is revealed.

关 键 词：多馈入直流 影响因素 评价指标 交互影响机理 轨迹动力学 直流换相安全裕度 

分 类 号：TM721.1[电气工程—电力系统及自动化]