提升三相并网逆变器稳定性的阻抗优化控制策略

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Abstract Three-phase grid-connected inverters are usually digitally controlled, and due to the negative damping effect brought about by the digital control delay, grid-connected inverters are prone to interact with the grid impedance (capacitive reactance) to produce high-frequency harmonic resonance when they are connected to the grid, which seriously affects the safe and stable operation of the power system. For the negative damping problem brought about by the controller delay, the low-frequency coupling effect of the inverter is ignored, and a high-frequency impedance model is established to reveal the high-frequency resonance mechanism, and the results show that the negative damping brought about by the delay exists a high-frequency resonance risk in the resonance peak interacting with the grid impedance. To improve the high-frequency resonance stability, based on the idea of passive design of the control loop, an approximate high-frequency passive composite impedance shaping is carried out for the grid-connected current loop control, and the parameter design process is given. An approximate high-frequency negative damping offset is achieved by modifying the control loop to enhance the stable operation capability of the system. Finally, the effectiveness of the proposed method is verified with Matlab/Simulink.

Key words： three-phase grid-connected inverters high-frequency resonance resonance mechanism impedance reshaping impedance optimization control

Received: 24 September 2024

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	CHEN Yufei
	TAO Tianyue

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CHEN Yufei,TAO Tianyue. An impedance optimization control strategy for enhancing the stability of three-phase grid-connected inverters[J]. Electrical Engineering, 2025, 26(4): 20-28.

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https://dqjs.cesmedia.cn/EN/Y2025/V26/I4/20

[1] 胡石阳, 刘国荣. 基于虚拟同步机的新能源并网智能控制研究[J].电气技术, 2022, 23(10): 10-17.
[2] 娄素华, 张立静, 吴耀武, 等. 低碳经济下电动汽车集群与电力系统间的协调优化运行[J].电工技术学报, 2017, 32(5): 176-183.
[3] 周孝信, 陈树勇, 鲁宗相, 等. 能源转型中我国新一代电力系统的技术特征[J].中国电机工程学报, 2018, 38(7): 1893-1904.
[4] BOROYEVICH D, CVETKOVIC I, BURGOS R, et al.Intergrid: a future electronic energy network[J].IEEE Journal of Emerging and Selected Topics in Power Electronics, 2013, 1(3): 127-138.
[5] 李明节, 于钊, 许涛, 等. 新能源并网系统引发的复杂振荡问题及其对策研究[J].电网技术, 2017, 41(4): 1035-1042.
[6] 谢小荣, 刘华坤, 贺静波, 等. 电力系统新型振荡问题浅析[J].中国电机工程学报, 2018, 38(10): 2821-2828.
[7] SAAD H, FILLION Y, DESCHANVRES S, et al.On resonances and harmonics in HVDC-MMC station connected to AC grid[J].IEEE Transactions on Power Delivery, 2017, 32(3): 1565-1573.
[8] ZOU Changyue, RAO Hong, XU Shukai, et al.Analysis of resonance between a VSC-HVDC con- verter and the AC grid[J].IEEE Transactions on Power Electronics, 2018, 33(12): 10157-10168.
[9] 郭贤珊, 刘斌, 梅红明, 等. 渝鄂直流背靠背联网工程交直流系统谐振分析与抑制[J].电力系统自动化, 2020, 44(20): 157-164.
[10] 杨诗琦, 刘开培, 秦亮, 等. MMC-HVDC高频振荡问题研究进展[J].高电压技术, 2021, 47(10): 3485-3496.
[11] 唐圣德, 胡海涛, 肖冬华, 等. 基于阻抗测量信息的电气化铁路“多车共网”系统稳定性分析[J].电工技术学报, 2024, 39(19): 6039-6053.
[12] 江海涛, 顾文, 梅睿, 等. 某海上风电场谐波谐振实测及仿真分析[J].电气技术, 2021, 22(11): 20-26.
[13] 姜齐荣, 王玉芝. 电力电子设备高占比电力系统电磁振荡分析与抑制综述[J].中国电机工程学报, 2020, 40(22): 7185-7200.
[14] 郑堃, 周林, 张前进, 等. 数字控制下光伏并网逆变器稳定性分析及参数优化设计[J].电工技术学报, 2018, 33(8): 1802-1813.
[15] PAN Donghua, RUAN Xinbo, WANG Xiongfei, et al.A highly robust single-loop current control scheme for grid-connected inverter with an improved LCCL filter configuration[J].IEEE Transactions on Power Elec- tronics, 2018, 33(10): 8474-8487.
[16] 张萍, 沈新鹤. 基于H_∞ 混合灵敏度的并网逆变器谐振控制策略[J].电气技术, 2022, 23(11): 6-12.
[17] 秦垚, 王晗, 庄圣伦, 等. 海上风电场集电网的高频谐振分析[J].中国电机工程学报, 2022, 42(14): 5169-5182.
[18] JIA Lei, RUAN Xinbo, ZHAO Wenxin, et al.An adaptive active damper for improving the stability of grid-connected inverters under weak grid[J].IEEE Transactions on Power Electronics, 2018, 33(11): 9561-9574.
[19] PAN Donghua, RUAN Xinbo, BAO Chenlei, et al.Capacitor-current-feedback active damping with reduced computation delay for improving robustness of LCL- type grid-connected inverter[J].IEEE Transactions on Power Electronics, 2014, 29(7): 3414-3427.
[20] 朱介北, 刘晓龙, 聂川杰, 等. 基于自适应滤波器的双馈风机次同步振荡抑制控制方案[J].中国电机工程学报, 2023, 43(增刊1): 44-56.
[21] HU Mingjin, HUA Wei, XIAO Huafeng, et al.Fast current control without computational delay by minimizing update latency[J].IEEE Transactions on Power Electronics, 2021, 36(11): 12207-12212.
[22] 郭小龙, 杨桂兴, 张彦军, 等. 构网型储能变流器并网系统SISO环路增益建模与重塑控制[J].电气技术, 2023, 24(2): 24-31, 51.
[23] WU Heng, WANG Xiongfei.Passivity-based dual-loop vector voltage and current control for grid-forming VSCs[J].IEEE Transactions on Power Electronics, 2021, 36(8): 8647-8652.
[24] 张东辉, 陈新, 杨舒婷, 等. 含静止无功补偿装置的光伏电站高频谐振分析及抑制策略研究[J].中国电机工程学报, 2023, 43(24): 9580-9594.
[25] 陈新, 王赟程, 龚春英, 等. 采用阻抗分析方法的并网逆变器稳定性研究综述[J].中国电机工程学报, 2018, 38(7): 2082-2094.