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一种抑制后续换相失败的电流偏差控制参数整定方法

A current deviation control parameter tuning method to suppress subsequent commutation failure
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摘要 电网换相换流器型高压直流输电(line commutated converter-based high voltage direct current,LCC-HVDC)系统若发生后续换相失败,将严重影响交直流混联电网的安全稳定运行。文中首先针对LCC-HVDC系统故障恢复过程中电流偏差控制作用阶段易再次发生换相失败的问题,对电流偏差控制参数与换相失败之间的关系进行理论分析,发现此阶段系统若不发生换相失败,逆变侧LCC直流电压和交流换相电压须满足一定的约束关系,且该约束关系受电流偏差控制参数的直接影响。然后,基于理论分析结果,提出一种电流偏差控制参数整定方法,可改善系统故障恢复过程中对直流电压恢复速度和程度的控制要求,使系统更易满足直流电压与交流换相电压稳定运行约束关系,以降低后续换相失败概率。最后,利用PSCAD/EMTDC仿真平台CIGRE标准测试模型验证了理论分析的正确性以及参数整定方法的有效性。 If a subsequent commutation failure occurs in the line commutated converter-based high voltage direct current(LCC-HVDC)transmission system,it will have a seriously negative impact on the safe and stable operation of the AC-DC hybrid power grid.Aiming at the problem of commutation failure during the current deviation control stage in the fault recovery process of the LCC-HVDC system,the relationship between current deviation control parameter and commutation failure is analyzed theoretically.It is found that to avoid commutation failure at this stage,the DC voltage and AC commutation voltage at the inverter side of the LCC need to meet certain constraints.These constraints are directly affected by the current deviation control parameter.Based on the theoretical analysis results,a current deviation control parameter tuning method is proposed,which can improve the control requirements for DC voltage recovery speed and degree during the fault recovery process of the system.The method makes it easier for the system to meet the stable operation constraints between DC voltage and AC commutation voltage,thereby reducing the probability of subsequent commutation failure.Finally,the CIGRE standard test model in the PSCAD/EMTDC simulation platform is used to verify the correctness of the theoretical analysis and the effectiveness of the parameter tuning method.
作者 李娟 朱龙臻 俎立峰 王先为 杨美娟 LI Juan;ZHU Longzhen;ZU Lifeng;WANG Xianwei;YANG Meijuan(XJ Group Co.,Ltd.,Xuchang 461000,China;XJ Electric Co.,Ltd.,Xuchang 461000,China;Xi′an XJ Power Electronics Technology Co.,Ltd.,Xi′an 710075,China)
出处 《电力工程技术》 北大核心 2024年第4期235-244,共10页 Electric Power Engineering Technology
基金 国家重点研发计划资助项目(2021YFB2400603)。
关键词 高压直流输电 故障恢复过程 后续换相失败 抑制措施 电流偏差控制 CIGRE标准测试模型 high voltage direct current fault recovery process subsequent commutation failure suppression measures current deviation control CIGRE standard test model
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