刘硕,李佳远,马速良,沙广林,李成新

• 1:北京未来电化学储能系统集成技术创新中心(北方工业大学)
• 2:中国电力科学研究院有限公司
• 3:中铁二十二局集团电气化工程有限公司

摘要(Abstract)：

虚拟同步发电机（virtual synchronous generator,VSG）作为构网型控制的主要技术之一，可为电网提供惯量支撑，但由于变流器单机容量有限，当系统需要更大的惯量支撑时，需要多VSG并联运行，因此多VSG并联的协同控制备受关注。基于此，建立了VSG多机并联的状态空间模型，通过状态变量矩阵的特征值分析系统稳定性。同时，提出了基于模型预测控制（model predictive control,MPC）的多VSG并联协同控制策略，引入角频率差与功角差作为性能指标设计目标函数，求解所需最佳有功额定增量，通过功频系数对输出角频率进行动态修正，实现对输出频率的主动支撑，有效抑制了VSG并联造成的系统频率波动，提高了电网的稳定性。结果表明，相较于传统的VSG并联系统，所提出的MPC-VSG并联控制方法可缩短系统暂态响应时间，提高系统在暂态下的鲁棒性。仿真结果验证了该方法的有效性。

关键词(KeyWords)： 构网型变流器;虚拟同步发电机;状态空间模型;模型预测控制;惯量支撑

Abstract:

Keywords:

基金项目(Foundation): 北京市科技新星计划(Z211100002121081)~~

作者(Author): 刘硕,李佳远,马速良,沙广林,李成新

DOI: 10.19666/j.rlfd.202403038

参考文献(References)：

• [1]张子扬,张宁,杜尔顺,等.双高电力系统频率安全问题评述及其应对措施[J].中国电机工程学报, 2022,42(1):1-24.ZHANG Ziyang, ZHANG Ning, DU Ershun, et al.Review and countermeasures on frequency security issues of power systems with high shares of renewables and power electronics[J]. Proceedings of the CSEE,2022, 42(1):1-24.
• [2]赵恩盛,韩杨,周思宇,等.微电网惯量与阻尼模拟技术综述及展望[J].中国电机工程学报, 2022, 42(4):1413-1427.ZHAO En’sheng, HAN Yang, ZHOU Siyu, et al. Review and prospect of inertia and damping simulation technologies of microgrids[J]. Proceedings of the CSEE,2022, 42(4):1413-1427.
• [3]王一振,邱逢良,雷鸣,等.含大容量新能源接入的柔性直流背靠背分区互联系统频率支撑策略研究[J].电网技术, 2023, 47(3):959-968.WANG Yizhen, QIU Fengliang, LEI Ming, et al.Frequency support strategy for VSC-BTB based DC segmented system with large capacity renewable energy integration[J]. Power System Technology, 2023, 47(3):959-968.
• [4]许诘翊,刘威,刘树,等.电力系统变流器构网控制技术的现状与发展趋势[J].电网技术, 2022, 46(9):3586-3594.XU Jieyi, LIU Wei, LIU Shu, et al. Current state and development trends of power system converter grid-forming control technology[J]. Power System Technology, 2022, 46(9):3586-3594.
• [5]耿华,何长军,刘浴霜,等.新能源电力系统的暂态同步稳定研究综述[J].高电压技术, 2022, 48(9):3367-3383.GENG Hua, HE Changjun, LIU Yushuang, et al.Overview on transient synchronization stability of renewable-rich power systems[J]. High Voltage Engineering, 2022, 48(9):3367-3383.
• [6]吕志鹏,盛万兴,钟庆昌,等.虚拟同步发电机及其在微电网中的应用[J].中国电机工程学报, 2014, 34(16):2591-2603.LYU Zhipeng, SHENG Wanxing, ZHONG Qingchang, et al. Virtual synchronous generator and its applications in micro-grid[J]. Proceedings of the CSEE, 2014, 34(16):2591-2603.
• [7]曹炜,钦焕乘,陆建忠,等.新型电力系统下虚拟同步机的定位和应用前景展望[J].电力系统自动化, 2023,47(4):190-207.CAO Wei, QIN Huancheng, LU Jianzhong, et al.Orientation and application prospect of virtual synchronous generator in new power system[J].Automation of Electric Power Systems, 2023, 47(4):190-207.
• [8] FU S, SUN Y, LIU Z, et al. Power oscillation suppression in multi-VSG grid with adaptive virtual inertia[J].International Journal of Electrical Power&Energy Systems, 2022, 135:107472.
• [9]宋琼,张辉,孙凯,等.多微源独立微网中虚拟同步发电机的改进型转动惯量自适应控制[J].中国电机工程学报, 2017, 37(2):412-423.SONG Qiong, ZHANG Hui, SUN Kai, et al. Improved adaptive control of inertia for virtual synchronous generators in islanding micro-grid with multiple distributed generation units[J]. Proceedings of the CSEE,2017, 37(2):412-423.
• [10]任碧莹,邱姣姣,刘欢,等.基于虚拟同步发电机双机并联系统的参数自调节优化控制策略[J].电工技术学报, 2019, 34(1):128-138.REN Biying, QIU Jiaojiao, LIU Huan, et al.Optimization control strategy of self-adjusting parameter based on dual-parallel virtual synchronous generators[J].Transactions of China Electrotechnical Society, 2019,34(1):128-138.
• [11] WANG Z, CHEN Y, LI X, et al. Active power oscillation suppression based on decentralized transient damping control for parallel virtual synchronous generators[J].IEEE Transactions on Smart Grid, 2023, 14(1):2582-2592.
• [12] CHEN M, ZHOU D, BLAABJERG F. Active power oscillation damping based on acceleration control in paralleled virtual synchronous generators system[J].IEEE Transactions on Power Electronics, 2021, 36(8):9501-9510.
• [13] YU Y, CHAUDHARY S K, TINAJERO G D A, et al.Active damping for dynamic improvement of multiple grid-tied virtual synchronous generators[J]. IEEE Transactions on Industrial Electronics, 2024, 71(4):3673-3683.
• [14] FU S, SUN Y, LI L, et al. Power oscillation suppression of multi-vsg grid via decentralized mutual damping control[J]. IEEE Transactions on Industrial Electronics,2021, 69(10):10202-10214.
• [15] LIU J, MIURA Y, BEVRANI H, et al. Enhanced virtual synchronous generator control for parallel inverters in microgrids[J]. IEEE Transactions on Smart Grid, 2016,8(5):2268-2277.
• [16] SHUAI Z, HUANG W, SHEN Z, et al. Active power oscillation and suppression techniques between two parallel synchronverters during load fluctuations[J].IEEE Transactions on Power Electronics, 2019, 35(4):4127-4142.
• [17] HIRASE Y, ABE K, SUGIMOTO K, et al. A novel control approach for virtual synchronous generators to suppress frequency and voltage fluctuations in microgrids[J]. Applied Energy, 2017, 210:699-710.
• [18]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.
• [19]付媛,张保泽,张祥宇,等.虚拟同步耦合下储能的频率支撑与功率振荡多目标协调控制[J/OL].电力自动化设备, 1-14[2024-07-29]. https://doi.org/10.16081/j.epae.202310001.FU Yuan, ZHANG Baoze, ZHANG Xiangyu, et al. Multi objective coordinated control of frequency support and power oscillation for energy storage under virtual synchronous coupling[J/OL]. Electric Power Automation Equipment, 1-14[2024-07-29]. https://doi.org/10.16081/j.epae.202310001.
• [20]兰征,吴方礽,余雪萍,等.含异构微源孤岛微电网暂态失稳分析与稳定策略研究[J].电网技术, 2023,47(11):4585-4599.LAN Zheng, WU Fangreng, YU Xueping, et al. Study on transient instability and stability strategy for islanded microgrid with heterogeneous micro-source[J]. Power System Technology, 2023, 47(11):4585-4599.
• [21]孙佳航,王小华,黄景光,等.基于MPC-VSG的孤岛微电网频率和电压动态稳定控制策略[J].中国电力,2023, 56(6):51-60.SUN Jiahang, WANG Xiaohua, HUANG Jingguang,et al. MPC-VSG based control strategy for dynamic stability of frequency an voltage in islanded microgrid[J].Electric Power, 2023, 56(6):51-60.
• [22]李帅虎,向丽珍,向振宇,等.用于改善VSG频率响应的模型预测控制方法[J].高电压技术, 2021, 47(8):2856-2864.LI Shuaihu, XIANG Lizhen, XIANG Zhenyu, et al. MPC control method for improving VSG frequency response[J]. High Voltage Engineering, 2021, 47(8):2856-2864.
• [23] LONG B, LIAO Y, CHONG K, et al. MPC-controlled virtual synchronous generator to enhance frequency and voltage dynamic performance in islanded microgrids[J].IEEE Transactions on Smart Grid, 2021, 12(2):953-964.
• [24] LONG B, LIAO Y, CHONG K, et al. Enhancement of frequency regulation in AC microgrid:a fuzzy-MPC controlled virtual synchronous generator[J]. IEEE Transactions on Smart Grid, 2021, 12(4):3138-3149.