考虑PQ环不对称效应的并网逆变器电网阻抗适应性提升方法

doi:10.3969/j.issn.1008-0198.2025.02.007

湖南电力 ›› 2025, Vol. 45 ›› Issue (2): 54-62.doi: 10.3969/j.issn.1008-0198.2025.02.007

• 源网协调与能源转换利用 • 上一篇下一篇

考虑PQ环不对称效应的并网逆变器电网阻抗适应性提升方法

王小源¹, 宁志毫¹, 卿梦琪¹, 高家元², 唐星祝³, 王慧娟³

1.国网湖南省电力有限公司电力科学研究院,湖南长沙 410208;
2.长沙理工大学电气与信息工程学院,湖南长沙 410114;
3.湖南省湘电试验研究院有限公司,湖南长沙 410208

收稿日期:2024-11-25 修回日期:2024-12-19 发布日期:2025-04-30
通信作者: 王小源(1995),男,硕士,工程师,主要从事电能质量分析治理和新能源并网控制等方面研究工作。
基金资助:
国网湖南省电力有限公司科技项目（5216A321N302）

A Method of Improving Grid Impedance Adaptability for Grid-Connected Inverters Considering Asymmetry Effect of PQ Power Loop

WANG Xiaoyuan¹, NING Zhihao¹, QING Mengqi¹, GAO Jiayuan², TANG Xingzhu³, WANG Huijuan³

1. State Grid Hunan Electric Power Company Limited Research Institute, Changsha 410208, China;
2. School of Electrical and Information Engineering, Changsha University of Science and Technology, Changsha 410114, China;
3. Hunan Xiangdian Test and Research Institute Co., Ltd., Changsha 410208, China

Received:2024-11-25 Revised:2024-12-19 Published:2025-04-30

摘要/Abstract

摘要： 针对PQ（有功、无功）功率控制下并网逆变器难以适应较大电网阻抗的难题,提出一种考虑PQ功率环不对称效应的并网逆变器电网阻抗适应性提升方法。首先,构建PQ功率控制并网逆变器的小信号控制方框图,揭示有功、无功控制环的不对称效应。在此基础上,针对无功环控制器参数对并网逆变器稳定性影响较敏感的特性,提出一种基于相位补偿的有功、无功环控制器参数不对称设计方法,扩大并网逆变器对电网阻抗的适应范围,有助于新能源的高渗透率接入。最后,通过仿真与实验验证所提控制方法的正确性与有效性。

关键词: 并网逆变器, 电网阻抗, PQ控制, 不对称, 相位补偿, 稳定性

Abstract: Aiming at the difficulty of grid-connected inverters under PQ power control to adapt to large grid impedance, a method to enhance the grid impedance adaptability of grid-connected inverters considering the asymmetric effect of PQ power loops is proposed. First, by constructing the small-signal control block diagram of the PQ power-controlled grid-connected inverter, the asymmetric effects of the active and reactive power control loops are revealed. On this basis, considering the characteristic that the parameters of the reactive power loop controller are more sensitive to the stability of the grid-connected inverter, an asymmetric design method for the active and reactive power loop controller parameters based on phase compensation is proposed, which significantly expands the adaptability range of the grid-connected inverter to grid impedance and aids in the high penetration rate access of new energy. Finally, the correctness and effectiveness of the proposed control method are verified through simulation and experimentation.

Key words: grid-connected inverter, grid impedance, PQ control, asymmetry, phase compensation, stability

中图分类号:

TM464

王小源, 宁志毫, 卿梦琪, 高家元, 唐星祝, 王慧娟. 考虑PQ环不对称效应的并网逆变器电网阻抗适应性提升方法[J]. 湖南电力, 2025, 45(2): 54-62.

WANG Xiaoyuan, NING Zhihao, QING Mengqi, GAO Jiayuan, TANG Xingzhu, WANG Huijuan. A Method of Improving Grid Impedance Adaptability for Grid-Connected Inverters Considering Asymmetry Effect of PQ Power Loop[J]. Hunan Electric Power, 2025, 45(2): 54-62.

参考文献

[1] 王一珺,杜文娟,王海风.基于改进复转矩系数法的多风电场接入引发多机电力系统次同步振荡机理分析[J]. 中国电机工程学报,2021,41(7):2383-2395.
[2] 周际城,彭晓涛,罗鹏,等.基于复转矩系数法的双馈风机次同步控制相互作用阻尼特性研究[J]. 电网技术,2020,44(4):1247-1257.
[3] ZHANG H Y,WANG X F,HARNEFORS L,et al.SISO transfer functions for stability analysis of grid-connected voltage-source converters[J]. IEEE Trans-actions on Industry Applications. 2019,55(3):2931-2941.
[4] 陈燕东,王伊,周乐明,等.弱电网下LCL逆变器阻尼谐振抑制与功率快速调节方法[J]. 电工技术学报,2018,33(11):2564-2574.
[5] TU C M,GAO J,XIAO F,et al.Stability analysis of the grid-connected inverter considering the asymmetric positive-feedback loops introduced by the PLL in weak grids[J]. IEEE Transactions on Industrial Electronics. 2022,69(6):5793-5802.
[6] 年珩,徐韵扬,陈亮,等.并网逆变器频率耦合特性建模及系统稳定性分析[J]. 中国电机工程学报,2019,39(5):1421-1432.
[7] 汤建,邹志翔,刘星琪,等.基于电力电子变压器的逆变器并网系统建模、稳定性分析及控制[J]. 电网技术,2021,45(11):4224-4233.
[8] LI C,WANG S,COLAS F,et al.Dominant instability mechanism of VSI connecting to a very weak grid[J]. IEEE Transactions on Power Systems. 2022,37(1):828-831.
[9] 郝亚峰,梁军,王克文,等.弱电网下风电有功出力对次同步振荡特性影响分析及参数调整[J].电网技术,2021,45(7):2752-2762.
[10] ARANI M F M,MOHAMED Y A I.Analysis and performance enhancement of vectorcontrolled VSC in HVDC links connected to very weak grids[J]. IEEE Transactions on Power Systems,2017,32(1):684-693.
[11] 吴广禄,王姗姗,周孝信,等.VSC接入弱电网时外环有功控制稳定性解析[J]. 中国电机工程学报,2019,39(21):6169-6183.
[12] 徐路遥,兰洲,陈飞,等.弱电网下无功控制对并网变流器稳定性影响分析[J]. 电力系统自动化,2019,43(15),56-63.
[13] HUANG L B,XIN H H,LI Z Y,et al.Grid-synchronization stability analysis and loop shaping for PLL-based power converters with different reactive power control[J]. IEEE Transactions on Smart Grid,2020,11(1):501-516.
[14] XUE D H,LIU J J,LIU Z,et al.Modeling and analysis of DC terminal impedance of voltage-source converters with different control modes[J]. IEEE Transactions on Power Electronics,2020,35(6):5883-5896.
[15] WU G,SUN H D,ZHANG X,et al.Parameter design oriented analysis of the current control stability of the weak-grid-tied VSC[J]. IEEE Transactions on Power Delivery,2021,36(3):1458-1470.
[16] HU J B,HUANG Y H,WANG D,et al.Modeling of grid-connected DFIG-based wind turbines for DC-link voltage stability analysis[J]. IEEE Transactions on Sustainable Energy,2015,6(4):1325-1336.
[17] 李光辉,王伟胜,张兴,等.双馈风电场并网次/超同步振荡建模与机理分析(一):考虑功率外环的阻抗建模[J]. 中国电机工程学报,2022,42(7):2438-2449.

考虑PQ环不对称效应的并网逆变器电网阻抗适应性提升方法

A Method of Improving Grid Impedance Adaptability for Grid-Connected Inverters Considering Asymmetry Effect of PQ Power Loop

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 6

编辑推荐

Metrics

本文评价

[1]	王小源, 宁志毫, 高家元, 卿梦琪, 夏天, 唐星祝, 易志坚. 混合不对称控制下多机分布式光伏并网稳定性提升方法[J]. 湖南电力, 2025, 45(2): 45-53.
[2]	朱红萍, 郭利文, 钱万明, 朱泓知, 韩迎龙. 附加虚拟阻抗的LCL型并网逆变器电流扰动观测控制方法[J]. 湖南电力, 2024, 44(2): 35-43.
[3]	周晗靓, 夏向阳, 李润伍, 郭宇, 易锐. 网压不对称下MMC多目标控制参数优化选择研究[J]. 湖南电力, 2024, 44(1): 45-52.
[4]	邓紫妮, 粟梅, 孙尧, 林建亨. 面向串联补偿三相并网逆变器的模拟阻抗控制策略[J]. 湖南电力, 2023, 43(5): 31-37.
[5]	曾麟, 朱赞, 徐勇, 向运琨, 何哲. 弱电网下LCL并网逆变器控制设计[J]. 湖南电力, 2023, 43(2): 90-96.
[6]	徐浩, 尹超勇, 董国琴, 王善诺, 许立强, 欧阳帆, 朱维钧. 基于RTDS的线路非稳定性高阻接地故障仿真[J]. 湖南电力, 2020, 40(4): 13-18.