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浙江大学电气工程学院,浙江省杭州市 310027
薛翼程(1995—),男,博士研究生,主要研究方向:新能源并网系统建模、稳定性分析及控制。E-mail:xyc995@zju.edu.cn
王国腾(1996—),男,博士研究生,主要研究方向:交直流大系统稳定性。E-mail:wgt339@zju.edu.cn
张哲任(1988—),男,博士,特聘副研究员,主要研究方向:直流输电与柔性交流输电、风力发电技术与风电场并网技术。E-mail:3071001296zhang@zju.edu.cn
徐政(1962—),男,通信作者,博士,教授,博士生导师,主要研究方向:大规模交直流电力系统分析、直流输电与柔性交流输电、电力谐波与电能质量、风力发电技术与风电场并网技术。E-mail:xuzheng007@zju.edu.cn
收稿:2021-08-27,
修回:2021-11-28,
网络出版:2022-02-16,
纸质出版:2022-05-10
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薛翼程,王国腾,张哲任等.MMC-HVDC接入对同步发电机阻尼转矩的影响机理分析[J].电力系统自动化,2022,46(9):99-108.
XUE Yicheng,WANG Guoteng,ZHANG Zheren,et al.Mechanism Analysis of Influence of MMC-HVDC Integration on Damping Torque of Synchronous Generators[J].Automation of Electric Power Systems,2022,46(9):99-108.
薛翼程,王国腾,张哲任等.MMC-HVDC接入对同步发电机阻尼转矩的影响机理分析[J].电力系统自动化,2022,46(9):99-108. DOI: 10.7500/AEPS20210827008.
XUE Yicheng,WANG Guoteng,ZHANG Zheren,et al.Mechanism Analysis of Influence of MMC-HVDC Integration on Damping Torque of Synchronous Generators[J].Automation of Electric Power Systems,2022,46(9):99-108. DOI: 10.7500/AEPS20210827008.
模块化多电平换流器型柔性直流输电(MMC-HVDC)接入可能引起同步发电机之间发生低频振荡失稳。为此,研究了采用功率同步控制和电流矢量控制的MMC-HVDC对同步发电机阻尼转矩的影响机理。首先,建立考虑模块化多电平换流器(MMC)影响的同步发电机改进Heffron-Philips动力学模型。随后,采用复转矩分析法,研究MMC通过网络动态耦合导致发电机出现负阻尼转矩的机理。进而,采用参数灵敏度分析,讨论和对比了两种典型控制策略下,导致同步发电机发生振荡失稳的MMC关键控制环节。最后,对采用功率同步控制的MMC提出了一种辅助控制策略,能够消除由其接入引起的同步发电机负阻尼转矩。基于PSCAD/EMTDC下搭建的多机系统电磁暂态仿真模型,验证了所提辅助控制策略的有效性和鲁棒性。
The integration of modular multilevel converter based high voltage direct current (MMC-HVDC) can cause low-frequency oscillation (LFO) instability between synchronous generators (SGs). Therefore
this paper studies the mechanism of influence of MMC-HVDC with power synchronization control (PSC) and vector current control (VCC) on the damping torque of SGs. First
the modified Heffron-Philips dynamic model of SG considering the influence of modular multilevel converter (MMC) is built. Then
by using the complex torque analysis method
the mechanism that leads to negative damping torque of generators induced by MMC through network dynamic coupling is studied. Furthermore
under the above two control strategies
the critical control links of MMC that can lead to LFO between SGs are discussed and compared through parameter sensitivity analysis. Finally
an auxiliary control strategy is proposed for the PSC based MMC to convert the damping torque of SGs caused by its integration from negative to positive. Based on the electromagnetic transient simulation model of a multi-machine system built in PSCAD/EMTDC
the effectiveness and robustness of the proposed auxiliary control strategy are verified.
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