弱电网下LCL逆变器阻尼谐振抑制与功率快速调节方法

doi:10.19595/j.cnki.1000-6753.tces.170432

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (33747 KB)
输出: BibTeX | EndNote (RIS)

摘要

位于电网末梢或偏远地区的新能源发电弱电网中,大量本地阻感性负荷的接入会引起电网阻抗变化与频率偏移及电压波动,进而影响LCL逆变器自身谐振尖峰抑制及其输出有功与无功动态调节过程。对此,提出了一种LCL逆变器阻尼谐振抑制与功率快速调节方法,包括鲁棒并网电流反馈有源阻尼控制、同步参考系准比例积分控制及功率快速调节。提出的鲁棒并网电流反馈有源阻尼控制增强了系统阻尼特性,抑制了LCL谐振尖峰;光伏能量功率前馈和负载无功快速检测可实现LCL逆变器的有功功率快速调节与电压无功紧急支撑功能;同步参考系准比例积分控制可降低电网基波频率偏移对系统稳定性的影响,增强了系统整体鲁棒性。通过深入分析控制系统动态响应和稳定性,给出了控制参数优化设计方法。最后,仿真及实验结果验证了所提控制策略的可行性。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	陈燕东
	王伊
	周乐明
	周小平
	谢志为

关键词 ：并网逆变器, LCL滤波器, 有源阻尼, 谐振抑制, 功率调节

Abstract：

For weak grids installed at remote areas, the grid-impedance variation and grid-frequencyfluctuation affectthe resonance peak suppressionand active/reactive power distributed accuracy respectively. In this paper, a LCL damping resonance suppression and fast power regulation method is proposed, which includes robust grid-current-feedback active damping control(RGCFAD), synchronous reference frame quasi-proportional-integral control(SRFQPI) and fast power regulation. The proposedRGCFAD control enhancesthe system’s damping characteristicsand damps well the LCL-resonance peak regardless of the grid impedance variation. The activepower feed-forward and fast reactive power detection can speed up the system response and compensate load reactive power. The proposed SRFQPI control reduces the influence of the fundamental frequency fluctuation and enhances the overall robustness of the whole system. The stability margin and dynamic response of the overall system are analyzed in detail, and the proper parameters are selected without complicated trial. Finally, Simulation and experimental results have verified the proposedcontrol and design strategies.

Key words： Grid-connected inverter LCL filter active damping resonance suppression power regulation

收稿日期: 2017-04-14 出版日期: 2018-06-13

PACS:

TM464

基金资助:

国家重点研发计划（2017YFB0902000）、国家自然科学基金（51577056）和湖南省自然科学基金（2017JJ2028）资助项目

通讯作者: 陈燕东男,1979年生,博士,副教授,博士生导师, 研究方向为新能源并网发电与微电网建模与控制、特种电源系统、电能质量控制。E-mail：yandong_chen@hnu.edu.cn

作者简介: 王伊女,1994年生,硕士研究生,研究方向为分布式发电技术、微电网控制。E-mail：604018918@qq.com

引用本文:

陈燕东, 王伊, 周乐明, 周小平, 谢志为. 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. Chen Yandong, Wang Yi, ZhouLeming, Zhou Xiaoping, Xie Zhiwei. Damping Resonance Suppression and Fast Power Regulation Methodfor LCL-Type Inverter under Weak Grid. Transactions of China Electrotechnical Society, 2018, 33(11): 2564-2574.

链接本文:

https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.170432 https://dgjsxb.ces-transaction.com/CN/Y2018/V33/I11/2564

[1] 余贻鑫, 栾文鹏. 智能电网述评[J]. 中国电机工程学报, 2009, 29(34): 1-6.
Yu Yixin, Luan Wenpeng.Smart grid and its implementations[J]. Proceedings of the CSEE, 2009, 29(34): 1-6.
[2] 黄宜平, 马晓轩. 微电网技术综述[J].电工技术学报, 2015, 30(1): 320-328.
Huang Yiping, Ma Xiaoxuan.Research on microgrid technology[J]. Transactions of China Electrotechnical Society, 2015, 30(1): 320-328.
[3] Blaabjerg F, Teodorescu R, Liserre M, et al.Overview of control and grid synchronization for distributed power generation systems[J]. IEEE Transactions on Industrial Electronics, 2006, 53(5): 1398-1409.
[4] 张旸, 陈新, 王昀, 等. 弱电网下并网逆变器的阻抗相角动态控制方法[J].电工技术学报, 2017, 32(1): 97-106.
Zhang Yang, Chen Xin, Wang Yun, et al.Impedance-phased dynamic control method of grid-connected inverters under weak grid condition[J]. Transactions of China Electrotechnical Society, 2017, 32(1): 97-106.
[5] Cobreces S, Bueno E, Rodriguez F J, et al.Influence analysis of the effects of an inductive-resistive weak grid over L and LCL filter current hysteresis controllers[C]// Proceedings of European Conference on Power Electronics and Applications, Aalborg, Denmark, 2007: 518-527.
[6] 陈燕东, 罗安, 谢三军, 等. 一种无延时的单相光伏并网功率控制方法[J]. 中国电机工程学报, 2012, 32(25): 118-125.
Chen Yandong, Luo An, Xie Sanjun, et al.A singlephase photovoltaic grid-connected power control method without delay[J]. Proceedings of the CSEE, 2012, 32(25): 118-125.
[7] 吴理博, 赵争鸣, 刘建政, 等. 具有无功补偿功能的单级式三相光伏并网系统[J]. 电工技术学报, 2006, 21(1): 28-32.
Wu Libo, Zhao Zhengming, Liu Jianzheng, et al.Implementation of a single-stage three-phase gridconnected photovoltaic system with reactive powercompensation[J]. Transactions of China Electrotechnical Society, 2006, 21(1): 28-32.
[8] Abeyasekera T, Johnson C, Atkinson D J, et al.Suppression of line voltage related distortion in current controlled grid connected inverters[J]. IEEE Transactions on Power Electronics, 2005, 20(6): 1393-1401.
[9] Pan Donghua, Ruan Xinbo, Bao Chenlei.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.
[10] 潘冬华, 阮新波, 王学华, 等. 提高LCL 型并网逆变器鲁棒性的电容电流即时反馈有源阻尼方法[J]. 中国电机工程学报, 2013, 33(18): 1-10.
Pan Donghua, Ruan Xinbo, Wang Xuehua, et al.A capacitor current real time feedback active damingmethod for improving robustness of the LCL type grid connected inverter[J]. Proceedings of the CSEE, 2013, 33(18): 1-10.
[11] Xu Jinming, Xie Shaojun, Tang Ting.Active damping based control for grid-connected LCL-filtered inverter with injected grid current feedback only[J]. IEEE Transactions on Industrial Electronics, 2014, 61(9): 4746-4758.
[12] Wang Xiongfei, Blaabjerg F, Loh P.Grid-current-feedback active damping for LCL resonance in grid-connected voltage source converters[J]. IEEE Transactions on Power Electronics, 2016, 31(1): 213-223.
[13] 周乐明, 罗安, 陈燕东, 等.单相LCL型并网逆变器功率控制及有源阻尼优化方法[J]. 电工技术学报, 2016, 31(6): 144-154.
Zhou Leming, Luo An, Chen Yandong, et al.A single-phase grid-connected power control and active damping optimization strategy with LCL filter[J]. Transactions of China Electrotechnical Society, 2016, 31(6): 144-154.
[14] Wu E, Lehn P W.Digital current control of a voltage source converter with active damping of LCL resonance[J]. IEEE Transactions on Power Electronics, 2006, 21(5): 1364-1373.
[15] Tanaka T, Hiraki E, Ueda K, et al.A novel detection method of active and reactive currents in single-phase circuits using the correlation and cross-correlation coefficients and its applications[J]. IEEE Transactions on Power Delivery, 2007, 22(4): 2450-2456.
[16] 杨东升, 阮新波, 吴恒. 提高LCL 型并网逆变器对弱电网适应能力的虚拟阻抗方法[J]. 中国电机工程学报, 2014, 34(15): 2327-2335.
Yang Dongsheng, Ruan Xinbo, Wu Heng.A virtual impedance method to improve the performance of LCL-type grid-connected inverters under weak gridconditions[J]. Proceedings of the CSEE, 2014, 34(15): 2327-2335.
[17] 沈瑶, 罗安, 陈燕东, 等. 基于功率前馈的光伏并网控制方法及稳定性分析[J]. 电网技术, 2014, 38(9): 2450-2454.
Shen Yao, Luo An, Chen Yandong, et al.A power feedforward-based control approach for grid-connection of photovoltaic generation and its stability analysis[J]. Power System Technology, 2014, 38(9): 2450-2454.
[18] Twining E, Holmes D G.Grid current regulation of athree-phase voltage source inverter with an LCL input filter[J]. IEEE Transactions on Power Electronics, 2003, 18(3): 888-895.
[19] Wang Haining, Su Jianhui, Zhang Guorong, et al.Unitive control of PV grid connected generation and reactive compensation[J]. Transactions of China Electrotechnical Society, 2005, 20(9): 114-118.
[20] Yang Dongsheng, Ruan Xinbo, Wu Heng.A real-time computation method with dual sampling mode to improve the current control performance of LCL-type grid-connected inverter[J]. IEEE Transactions Industrial Electronics, 2015, 62(7): 4563-4572.
[21] 陈燕东, 罗安, 周乐明, 等. 一种功率前馈的鲁棒预测无差拍并网控制方法[J]. 中国电机工程学报, 2013, 33(36): 62-70.
Chen Yandong, Luo An, Zhou Leming, et al.A robust predictive deadbeat grid-connected control method based on power feed-forward control[J]. Proceedings of the CSEE, 2013, 33(36): 62-70.
[22] 汪海宁, 苏建徽, 张国荣, 等.光伏并网发电及无功补偿的统一控制[J]. 电工技术学报, 2005, 20(9): 114-118.
Wang Haining, Su Jianhui, Zhang Guorong, et al.Unitive control of PV grid connected generation and reactive compensation[J]. Transactions of China Electrotechnical Society, 2005, 20(9): 114-118.
[23] Monfared M, Golestan S, Guerrero J M.Analysis, design, and experimental verification of a synchronous reference frame voltage control for single-phase inverters[J]. IEEE Transactions on Industrial. Electronics, 2014, 61(1): 258-269.