基于序阻抗的虚拟同步机同步频率谐振现象

doi:10.19595/j.cnki.1000-6753.tces.210697

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摘要针对虚拟同步机（VSG）的同步频率谐振（SFR）现象,鉴于多输入多输出功率耦合模型的不足,通过建立可描述VSG宽频域动态特性的单输入单输出序阻抗模型,提出一种基于序导纳和序阻抗的SFR分析方法,并对单环和多环控制VSG的SFR现象进行对比研究。基于序导纳的极点分布,有效研究SFR与VSG功率环控制参数、虚拟阻抗、内环控制及电网阻抗之间的关系;基于序阻抗的频率特性曲线,对比内环控制引入前后SFR的阻尼特性,从“负阻尼”的角度揭示单环和多环控制VSG的SFR谐振机理;搭建基于RT-Box的实验平台,验证VSG在不同控制方案及不同电网阻抗下的SFR现象,指明VSG控制的优化设计方向。

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	于彦雪
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	李浩昱

关键词 ：虚拟同步机, 同步频率谐振, 序阻抗, 负阻尼, 内环控制

Abstract：As for the synchronous frequency resonance (SFR) phenomenon existing in virtual synchronous generator (VSG), considering the shortcomings of multi-input multi-output power coupling SFR analysis models, a sequence-admittance and sequence-impedance based SFR analysis method is proposed by modeling the single-input single-output sequence impedance model that can describe the wide-frequency dynamics of the VSG, and the SFR phenomena of single-loop and multi-loop VSG are comparatively studied. Based on the pole distribution map of sequence admittance, the relationships between SFR and the VSG power control loop parameters, virtual impedance, inner-loop control and grid impedance are effectively studied. Based on the Bode diagrams of sequence-impedance, the damping characteristics of SFR with and without the inner-loop control are compared, and then the resonance mechanism of SFR in single-loop and multi-loop VSG is revealed from the perspective of negative damping. By building the experimental platform based on the RT-Box, the SFR phenomena of VSG under different control schemes and grid impedances are verified, indicating the optimal design direction of VSG control.

Key words： Virtual synchronous generator synchronous frequency resonance sequence-impedance negative damping inner-loop control

收稿日期: 2021-05-18

PACS:

TM464

基金资助:黑龙江电力公司科技资助项目（522437200038）

通讯作者: 李浩昱男,1974年生,教授,博士生导师,研究方向为微网环境变换器协调控制技术、极端环境电能变换与控制。E-mail: lihy@hit.edu.cn

作者简介: 于彦雪女,1991年生,博士研究生,研究方向为弱电网下并网逆变器建模及稳定性研究。E-mail: yuyanxueppkz@163.com

引用本文:

于彦雪, 关万琳, 陈晓光, 李浩昱. 基于序阻抗的虚拟同步机同步频率谐振现象[J]. 电工技术学报, 2022, 37(10): 2584-2595. Yu Yanxue, Guan Wanlin, Chen Xiaoguang, Li Haoyu. Synchronous Frequency Resonance in Virtual Synchronous Generator Based on Sequence-Impedance. Transactions of China Electrotechnical Society, 2022, 37(10): 2584-2595.

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[1] 姜静雅, 王玮, 吴学智, 等. 基于自适应无功功率补偿的虚拟同步机功率解耦策略[J]. 电工技术学报, 2020, 35(13): 2747-2756.
Jiang Jingya, Wang Wei, Wu Xuezhi, et al.Power decoupling strategy in virtual synchronous generator based on adaptive reactive power compensation[J]. Transactions of China Electrotechnical Society, 2020, 35(13): 2747-2756.
[2] 章艳, 高晗, 张萌. 不同虚拟同步机控制下双馈风机系统频率响应差异研究[J]. 电工技术学报, 2020, 35(13): 2889-2900.
Zhang Yan, Gao Han, Zhang Meng.Research on frequency response difference of DFIG system controlled by different virtual synchronous generator controls[J]. Transactions of China Electrotechnical Society, 2020, 35(13): 2889-2900.
[3] 张琛, 蔡旭, 李征. 具有自主电网同步与弱网稳定运行能力的双馈风电机组控制方法[J]. 中国电机工程学报, 2017, 37(2): 476-485.
Zhang Chen, Cai Xu, Li Zheng.Control of DFIG- based wind turbines with the capability of automatic grid-synchronization and stable operation under weak grid condition[J]. Proceedings of the CSEE, 2017, 37(2): 476-485.
[4] Liu Jia, Miura Y, Ise T.Comparison of dynamic characteristics between virtual synchronous generator and droop control in inverter-based distributed gener- ators[J]. IEEE Transactions on Power Electronics, 2016, 31(5): 3600-3611.
[5] 颜湘武, 贾焦心, 王德胜, 等. 基于P/ω“导纳”的并联虚拟同步机功频响应建模与分析[J]. 电工技术学报, 2020, 35(15): 3191-3202.
Yan Xiangwu, Jia Jiaoxin, Wang Desheng, et al.Modeling and analysis of active power-frequency response of parallel VSGs using a P/ω “Admittance”[J]. Transactions of China Electrotechnical Society, 2020, 35(15): 3191-3202.
[6] Chen Junru, O'Donnell T. Parameter constraints for virtual synchronous generator considering stability[J]. IEEE Transactions on Power Systems, 2019, 34(3): 2479-2481.
[7] 李武华, 王金华, 杨贺雅, 等. 虚拟同步发电机的功率动态耦合机理及同步频率谐振抑制策略[J]. 中国电机工程学报, 2017, 37(2): 381-390.
Li Wuhua, Wang Jinhua, Yang Heya, et al.Power dynamic coupling mechanism and resonance suppression of synchronous frequency for virtual synchronous generators[J]. Proceedings of the CSEE, 2017, 37(2): 381-390.
[8] Yang Dongsheng, Wu Heng, Wang Xiongfei, et al.Suppression of synchronous resonance for VSGs[J]. The Journal of Engineering, 2017, 13(1): 2574-2579.
[9] Li Xin, Hu Yaowei, Shao Yuting, et al.Mechanism analysis and suppression strategies of power oscilla- tion for virtual synchronous generator[C]//IECON 2017-43rd Annual Conference of the IEEE Industrial Electronics Society, Beijing, China, 2017: 4955-4960.
[10] 张行, 张兴, 李明, 等. 基于暂态虚拟电阻VSG同步频率谐振抑制策略[J]. 电力电子技术, 2019, 53(3): 68-70, 81.
Zhang Hang, Zhang Xing, Li Ming, et al.Synchronous frequency resonance suppression strategy for virtual synchronous generators based on transient virtual resistance[J]. Power Electronics, 2019, 53(3): 68-70, 81.
[11] 涂春鸣, 谢伟杰, 肖凡, 等. 控制延时对虚拟同步机全局稳定性的影响分析[J]. 电网技术, 2020, 44(8): 3021-3028.
Tu Chunming, Xie Weijie, Xiao Fan, et al.Analysis of influence of control delay on stability of virtual synchronous machine[J]. Power System Technology, 2020, 44(8): 3021-3028.
[12] 李辉, 王坤, 胡玉, 等. 双馈风电系统虚拟同步控制的阻抗建模及稳定性分析[J]. 中国电机工程学报, 2019, 39(12): 3434-3442.
Li Hui, Wang Kun, Hu Yu, et al.Impedance modeling and stability analysis of virtual synchronous control based on doubly-fed wind generation systems[J]. Proceedings of the CSEE, 2019, 39(12): 3434-3442.
[13] 涂春鸣, 谢伟杰, 肖凡, 等. 多虚拟同步发电机并联系统控制参数对稳定性的影响分析[J]. 电力系统自动化, 2020, 44(15): 77-86.
Tu Chunming, Xie Weijie, Xiao Fan, et al.Influence analysis of control parameters of parallel system with multiple virtual synchronous generators on stability[J]. Automation of Electric Power Systems, 2020, 44(15): 77-86.
[14] Cespedes M, Sun Jian.Adaptive control of grid- connected inverters based on online grid impedance measurements[J]. IEEE Transactions on Sustainable Energy, 2014, 5(2): 516-523.
[15] Wu Wenhua, Chen Yandong, Zhou Leming, et al.Sequence impedance modeling and stability com- parative analysis of voltage-controlled VSGs and current-controlled VSGs[J]. IEEE Transactions on Industrial Electronics, 2019, 66(8): 6460-6472.