多直驱风机经柔直并网系统相近次同步振荡模式参与因子的弱鲁棒性分析  被引量:21

Weak Robustness Analysis of Close Subsynchronous Oscillation Modes’Participation Factors in Multiple Direct-Drive Wind Turbines with the VSC-HVDC System

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作  者:邵冰冰 赵峥 肖琪 杨之青 孟潇潇 Shao Bingbing;Zhao Zheng;Xiao Qi;Yang Zhiqing;Meng Xiaoxiao(Anhui Province Key Laboratory of Renewable Energy Utilization and Energy Saving Hefei University of Technology,Hefei 230009 China;State Grid Economic and Technological Research Institute Co.Ltd,Beijing 102209 China)

机构地区:[1]新能源利用与节能安徽省重点实验室(合肥工业大学),合肥230009 [2]国网经济技术研究院有限公司,北京102209

出  处:《电工技术学报》2023年第3期754-769,共16页Transactions of China Electrotechnical Society

基  金:国家自然科学基金项目(52207086);国家电网公司总部科技项目(5500-202221124A-1-1-ZN)资助。

摘  要:多台直驱风电机组运行工况相似的情况下,直驱风电场经柔直并网系统中存在相近的次同步振荡(SSO)模式,这些SSO模式的参与因子对参数变化极为敏感,从而影响阻尼控制器的最优安装位置。针对这一特殊现象,首先基于矩阵摄动理论,揭示相近SSO模式的参与因子对参数变化敏感的原因;然后,呈现了这一特殊现象对阻尼控制器的不利影响,并提出了参与因子灵敏度的概念,分析了关键因素对多直驱风机经柔直并网系统相近SSO模式的参与因子灵敏度;最后,提出了存在相近SSO模式情况下消除/减小参与因子弱鲁棒性危害的多种方案。通过在PSCAD/EMTDC中搭建多直驱风机经柔直并网系统的时域仿真模型,验证了理论分析结果的正确性。Direct-drive wind farms with the VSC-HVDC(DDWFV)system face the risk of sub-synchronous oscillations(SSOs),and multiple similar permanent magnet synchronous generators(PMSGs)grid-connected system contain multiple close SSO modes.Recently,the strong resonance,weak resonance and open-loop mode resonance when the SSO modes approach were analyzed.However,the research was about the change of SSO modes,while the change of close SSO modes’participation factors(PFs)was rarely studied.Certain research showed that the PF of SSO modes was sensitive to parameter changes,but the phenomenon was not explained theoretically and under which condition does the phenomenon happen was unknown.The PF reflects the participation of system state variables in the SSO modes,which determines the optimal location of damping controllers.Generally,the damping controller is preferred installed on the PMSGs with the largest PF.Therefore,the PF has a great impact on the performance of damping controllers,and it is necessary to reveal the reason why the PFs of close SSOs are sensitive to parameter changes,and appropriate tools need to be proposed to analyze this phenomenon.For the convenience of description,the phenomenon that the PF is sensitive to parameter changes is defined as the PFs weak robustness.Firstly,the dynamic model of the DDWFV is built,which includes the dynamic models of PMSG power generation system,VSC-HVDC,and their interface model.Secondly,the PFs weak robustness phenomenon is presented with the homogeneous wind farms,heterogeneous wind farms and large-scale wind farms.The homogeneous and heterogeneous wind farms are based on the three-machine model,and the large-scale wind farms are based on the 160-machine model.After presenting the PFs weak robustness phenomenon,the PFs weak robustness mechanism is revealed with the matrix perturbation method,which explains the little change of SSO modes and large change of PFs under the parameter perturbation.Thirdly,the PFs weak robustness hazards are presented with the three-machine sys

关 键 词:直驱风机 次同步振荡 相近振荡模式 摄动理论 参与因子灵敏度 

分 类 号:TM614[电气工程—电力系统及自动化]

 

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