并网逆变器一种减小死区影响的改进前馈策略

李雨泽; 张欣; 郭斌; 廖志凌; 柳张杰

doi:10.19912/j.0254-0096.tynxb.2023-2089

PDF(14921 KB)

太阳能学报 ›› 2025, Vol. 46 ›› Issue (4) : 143-152. DOI: 10.19912/j.0254-0096.tynxb.2023-2089

并网逆变器一种减小死区影响的改进前馈策略

李雨泽¹, 张欣², 郭斌², 廖志凌³, 柳张杰¹

作者信息 +

AN IMPROVED FEEDFORWARD STRATEGY TO REDUCING DEAD-TIME EFFECT OF GRID-CONNECTED INVERTER

Li Yuze¹, Zhang Xin², Guo Bin², Liao Zhiling³, Liu Zhangjie¹

Author information +

文章历史 +

摘要

以三相LC型并网逆变器为研究对象,首先从闭环传递函数的角度,揭示弱电网下传统公共耦合点（PCC）电压前馈策略与线路阻抗的交互作用会放大死区引入谐波,恶化系统电能质量。在此基础上,提出一种基于高通与低通滤波器的改进PCC电压前馈控制策略,该控制策略适用于大功率场合,且可在兼顾系统动态性能与稳定性的情况下有效减小死区影响,改善系统电能质量。最后通过仿真与实验验证所提控制策略的有效性。

Abstract

This paper takes three-phase LC type grid-connected inverters as the research object. Firstly, from the perspective of closed-loop transfer function,it is revealed that the interaction between traditional PCC voltage feedforward strategy and line impedance amplifies the harmonics introduced by dead-time, thereby deteriorating the system power quality under a weak grid from the perspective of closed-loop transfer function. On this basis, this paper proposes an improved PCC voltage feedforward control strategy based on high-pass and low-pass filters. This control strategy is suitable for high-power applications. It can improve the power quality and reduce the dead-time effect of the system while taking the dynamic performance and the system stability into account. Finally, the effectiveness of the proposed control strategy is validated through simulation and experiment.

导出引用

李雨泽, 张欣, 郭斌, 廖志凌, 柳张杰. 并网逆变器一种减小死区影响的改进前馈策略[J]. 太阳能学报. 2025, 46(4): 143-152 https://doi.org/10.19912/j.0254-0096.tynxb.2023-2089

Li Yuze, Zhang Xin, Guo Bin, Liao Zhiling, Liu Zhangjie. AN IMPROVED FEEDFORWARD STRATEGY TO REDUCING DEAD-TIME EFFECT OF GRID-CONNECTED INVERTER[J]. Acta Energiae Solaris Sinica. 2025, 46(4): 143-152 https://doi.org/10.19912/j.0254-0096.tynxb.2023-2089

中图分类号： TM464

参考文献

[1] GUO B, ZHANG X, SU M, et al.A single-phase common-ground five-level transformerless inverter with low component count for PV applications[J]. IEEE transactions on industrial electronics, 2023, 70(3): 2662-2674.
[2] LI M, ZHANG X, GUO Z X, et al.Impedance adaptive dual-mode control of grid-connected inverters with large fluctuation of SCR and its stability analysis based on D-partition method[J]. IEEE transactions on power electronics, 2021, 36(12): 14420-14435.
[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, 2205.
ZHOU X X, CHEN S Y, LU Z X, et al.Technology features of the new generation power system in China[J]. Proceedings of the CSEE, 2018, 38(7): 1893-1904, 2205.
[4] GB/T 37408—2019, 光伏发电并网逆变器技术要求[S].
GB/T 37408—2019, Technical requirements for photovoltaic grid connected inverter[S].
[5] LEE J H, SUL S K.Inverter nonlinearity compensation through deadtime effect estimation[J]. IEEE transactions on power electronics, 2021, 36(9): 10684-10694.
[6] 许德志, 汪飞, 毛华龙, 等. 多并网逆变器与电网的谐波交互建模与分析[J]. 中国电机工程学报, 2013, 33(12): 64-71.
XU D Z, WANG F, MAO H L, et al.Modeling and analysis of harmonic interaction between multiple grid-connected inverters and the utility grid[J]. Proceedings of the CSEE, 2013, 33(12): 64-71.
[7] 焦宁, 刘天琪, 王顺亮, 等. 三相两电平逆变器死区效应谐波分析及其补偿方法研究[J]. 电网技术, 2020, 44(6): 2169-2176.
JIAO N, LIU T Q, WANG S L, et al.Harmonic analysis and compensation method for dead-time effects in three-phase two-level inverters[J]. Power system technology, 2020, 44(6): 2169-2176.
[8] 张继元, 舒杰, 王浩, 等. 基于电流矢量的三电平逆变器死区补偿策略[J]. 太阳能学报, 2018, 39(6): 1637-1645.
ZHANG J Y, SHU J, WANG H, et al.Dead-time compensation strategy based on current vector for three-level inverter[J]. Acta energiae solaris sinica, 2018, 39(6): 1637-1645.
[9] 王少杰, 罗安. 谐波域死区效应分析及补偿方法的研究[J]. 电工技术学报, 2009, 24(8): 111-119.
WANG S J, LUO A.Study of dead-time effect and its compensation strategies[J]. Transactions of China Electrotechnical Society, 2009, 24(8): 111-119.
[10] 张前进, 周林, 毛明轩, 等. 逆变器死区建模及其对大型光伏并网系统的影响[J]. 太阳能学报, 2020, 41(9): 161-168.
ZHANG Q J, ZHOU L, MAO M X, et al.Inverter deadtime modeling and its influence on grid-connected PV system[J]. Acta energiae solaris sinica, 2020, 41(9): 161-168.
[11] 周汉斌, 杨建, 陈晓娇, 等. 考虑死区电压矢量的三电平变换器模型预测控制[J]. 电工技术学报, 2022, 37(20): 5290-5301.
ZHOU H B, YANG J, CHEN X J, et al.Model predictive control of three-level converter considering dead-zone voltage vector[J]. Transactions of China Electrotechnical Society, 2022, 37(20): 5290-5301.
[12] 宋春伟, 陈子立, 孙冠群, 等. 光伏模拟器用死区消除PWM整流器运行方式[J]. 太阳能学报, 2023, 44(2): 366-372.
SONG C W, CHEN Z L, SUN G Q, et al.Operation mode of pwm rectifier with dead-time elimination for photovoltaic simulator[J]. Acta energiae solaris sinica, 2023, 44(2): 366-372.
[13] 陈杰, 章新颖, 闫震宇, 等. 基于虚拟阻抗的逆变器死区补偿及谐波电流抑制分析[J]. 电工技术学报, 2021, 36(8): 1671-1680.
CHEN J, ZHANG X Y, YAN Z Y, et al.Dead-time effect and background grid-voltage harmonic suppression methods for inverters with virtual impedance control[J]. Transactions of China Electrotechnical Society, 2021, 36(8): 1671-1680.
[14] LI M, ZHANG X, GUO Z X, et al.The control strategy for the grid-connected inverter through impedance reshaping in q-axis and its stability analysis under a weak grid[J]. IEEE journal of emerging and selected topics in power electronics, 2021, 9(3): 3229-3242.
[15] 钱强, 谢少军, 季林, 等. 一种提升逆变器对电网适应能力的电流控制策略[J]. 中国电机工程学报, 2016, 36(22): 6193-6201.
QIAN Q, XIE S J, JI L, et al.A current control strategy to improve the adaptability to utility for inverters[J]. Proceedings of the CSEE, 2016, 36(22): 6193-6201.
[16] 廖志凌, 李雨泽, 郭斌. 三相LC型并网逆变器阻抗建模及稳定性分析[J]. 电力电子技术, 2023, 57(9): 1-4.
LIAO Z L, LI Y Z, GUO B.Impedance modeling and stability analysis of three-phase LC grid-connected inverter[J]. Power electronics, 2023, 57(9): 1-4.
[17] 徐飞, 汤雨, 谷伟. 弱电网条件下LCL型并网逆变器谐振前馈控制策略研究[J]. 中国电机工程学报, 2016, 36(18): 4970-4979.
XU F, TANG Y, GU W.Resonant feedforward control strategy for LCL-type grid-connected inverters in weak grid condition[J]. Proceedings of the CSEE, 2016, 36(18): 4970-4979.
[18] 杨兴武, 王涛, 徐依明, 等. 基于虚拟电感的LCL型并网逆变器电网电压前馈控制策略[J]. 太阳能学报, 2020, 41(11): 56-63.
YANG X W, WANG T, XU Y M, et al.Voltage feedforward control of lcl grid-connected inverter based on virtual inductor[J]. Acta energiae solaris sinica, 2020, 41(11): 56-63.
[19] WANG X H, RUAN X B, LIU S W, et al.Full feedforward of grid voltage for grid-connected inverter with LCL filter to suppress current distortion due to grid voltage harmonics[J]. IEEE transactions on power electronics, 2010, 25(12): 3119-3127.
[20] 徐健, 曹鑫, 郝振洋, 等. 基于电网谐波电压前馈的虚拟同步整流器电流谐波抑制方法[J]. 电工技术学报, 2022, 37(8): 2018-2029.
XU J, CAO X, HAO Z Y, et al.A harmonic-current suppression method for virtual synchronous rectifier based on feedforward of grid harmonic voltage[J]. Transactions of China Electrotechnical Society, 2022, 37(8): 2018-2029.
[21] 段晓宁, 李萍, 赵峰, 等. 弱电网下基于电容电压全前馈的LCL型并网逆变器稳定性控制[J]. 高电压技术, 2022, 48(6): 2140-2151.
DUAN X N, LI P, ZHAO F, et al.Stability control of LCL-type grid-connected inverter based on capacitor voltage full feedforward under weak grid condition[J]. High voltage engineering, 2022, 48(6): 2140-2151.