逆变负载下光储DC/DC变换器的MPPT抖动抑制方法

刘宝泉; 张浩铭; 李昊轩; 韩猛

doi:10.19912/j.0254-0096.tynxb.2023-1874

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太阳能学报 ›› 2025, Vol. 46 ›› Issue (3) : 384-393. DOI: 10.19912/j.0254-0096.tynxb.2023-1874

逆变负载下光储DC/DC变换器的MPPT抖动抑制方法

刘宝泉, 张浩铭, 李昊轩, 韩猛

作者信息 +

MPPT RIPPLE SUPPRESSION METHOD FOR PHOTOVOLTAIC-STORAGE DC/DC CONVERTER UNDER INVERTER LOAD

Liu Baoquan, Zhang Haoming, Li Haoxuan, Han Meng

Author information +

文章历史 +

摘要

针对光储DC/DC变换器带逆变器负载造成光伏最大功率点追踪（MPPT）抖动的问题,提出一种直流电压前馈与负载识别的MPPT抖动抑制方法。蓄电池电压二倍频波动及其诱发的系统工作模式动态切换是造成MPPT抖动的主要原因。首先基于蓄电池Thevenin等效模型,分析逆变负载下蓄电池各等效参数对直流母线电压脉动的作用机理并建立含蓄电池等效参数的DC/DC变换器反向增益模型,随后提出母线电压波动耦合的前馈抑制方法。进一步根据蓄电池MPPT充电模式、恒压-恒流充电模式的切换关系,分析逆变负载导致工作模式不稳定切换的诱因,提出一种负载识别方法,通过时间窗检测直流母线电压脉动情况作为环路切换附加判据,有效规避工作模式的动态切换。仿真和实验结果表明所提组合方法可有效降低逆变器负载下光储DC/DC的MPPT抖动。

Abstract

This paper introduces a novel control method to address maximum power point tracking （MPPT） ripple in photovoltaic-storage DC/DC converter under inverter load. The double-line frequency of the battery voltage pulsation and the resulting dynamic mode switching of system is the main cause of MPPT ripple. Firstly, the effect of battery’s equivalent parameters under inverter load on DC bus voltage pulsation is analysed based on the Thevenin equivalent model, and a back gain model incorporating the battery’s equivalent parameters of DC/DC converter is established. Additionally, a feedforward method is proposed for suppressing bus voltage pulsation. Furthermore, an analysis is conducted to identify the causes of dynamic mode switching induced by inverter loads based on the relationship between MPPT charging mode and constant voltage-constant current charging mode. A load identification algorithm is proposed to avoid dynamic mode switching, by using a time window to detect bus voltage pulsation as an additional loop switching criterion. Finally, simulation and experimental results show that the proposed combined method can effectively reduce MPPT ripple in the photovoltaic-storage DC/DC converter under inverter load.

导出引用

刘宝泉, 张浩铭, 李昊轩, 韩猛. 逆变负载下光储DC/DC变换器的MPPT抖动抑制方法[J]. 太阳能学报. 2025, 46(3): 384-393 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1874

Liu Baoquan, Zhang Haoming, Li Haoxuan, Han Meng. MPPT RIPPLE SUPPRESSION METHOD FOR PHOTOVOLTAIC-STORAGE DC/DC CONVERTER UNDER INVERTER LOAD[J]. Acta Energiae Solaris Sinica. 2025, 46(3): 384-393 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1874

中图分类号： TN624

参考文献

[1] 徐玉琴, 方楠. 基于稳压控制的独立光储微电网控制策略研究及仿真分析[J]. 电力系统保护与控制, 2020, 48(21): 67-74.
XU Y Q, FANG N.Control strategy research and simulation analysis of an independent optical storage microgrid based on voltage stabilizing control[J]. Power system protection and control, 2020, 48(21): 67-74.
[2] 高明, 余伟臣, 石健将. 一种用于光储系统的部分功率三端口直流变换器[J]. 太阳能学报, 2022, 43(6): 42-48.
GAO M, YU W C, SHI J J.A partial power processing three-port DC/DC converter for photovoltaic-storage system[J]. Acta energiae solaris sinica, 2022, 43(6): 42-48.
[3] 秦岭, 谢少军, 罗松. 恒压充电模式下独立光伏储能系统的鲁棒稳定控制器设计[J]. 中国电机工程学报, 2018, 38(12): 3451-3460.
QIN L, XIE S J, LUO S.Design of robust controller for stand-alone photovoltaic energy storage system in constant voltage charging mode[J]. Proceedings of the CSEE, 2018, 38(12): 3451-3460.
[4] 易磊, 谢雨龙, 曾凡炎, 等. 基于神经网络的改进扰动观察法MPPT控制[J]. 太阳能学报, 2022, 43(4): 198-203.
YI L, XIE Y L, ZENG F Y, et al.Improved perturbation observation method MPPT control based on neural network[J]. Acta energiae solaris sinica, 2022, 43(4): 198-203.
[5] ERTASGIN G, WHALEY D M, ERTUGRUL N, et al.Energy storage element sizing for single-phase grid-connected photovoltaic converter[C]//2014 16th International Power Electronics and Motion Control Conference and Exposition. Antalya, Turkey, 2014: 1005-1010.
[6] 候虚虚, 秦岭, 茅靖峰, 等. 两级式单相光伏并网逆变器输入电压PI+QPR鲁棒控制器设计[J]. 电网技术, 2017, 41(9): 2910-2918.
HOU X X, QIN L, MAO J F, et al.Design of input voltage robust PI+QPR controller for two-stage single-phase PV grid-connected inverter[J]. Power system technology, 2017, 41(9): 2910-2918.
[7] 范恩泽, 赵鲁, 李耀华, 等. 应用于两级式逆变的双有源串联谐振变换器二倍频波动抑制及控制参数设计[J]. 电力系统保护与控制, 2023, 51(17): 58-68.
FAN E Z, ZHAO L, LI Y H, et al.Second harmonic suppression and design of control parameters for a dual-active-bridge series resonant converter applied to a two-stage inverter[J]. Power system protection and control, 2023, 51(17): 58-68.
[8] 陈瑞成, 苗加振, 胡骢, 等. 单相光伏逆变器直流母线电压二次波动对系统影响的分析与抑制[J]. 电测与仪表, 2017, 54(10): 7-13, 20.
CHEN R C, MIAO J Z, HU C, et al.Analysis and suppression on effect of secondary voltage disturbances of DC bus for single-phase PV inverter[J]. Electrical measurement & instrumentation, 2017, 54(10): 7-13, 20.
[9] 王建华, 卢旭倩, 张方华, 等. 两级式单相逆变器输入电流低频纹波分析及抑制[J]. 中国电机工程学报, 2012, 32(6): 10-16.
WANG J H, LU X Q, ZHANG F H, et al.Low frequency input current ripple analysis and reduction in a single phase inverter with two-stage structure[J]. Proceedings of the CSEE, 2012, 32(6): 10-16.
[10] 秦岭, 谢少军, 杨晨, 等. 光伏储能系统恒流充电模式下光伏电池的稳定工作区[J]. 电网技术, 2017, 41(2): 462-469.
QIN L, XIE S J, YANG C, et al.Stable operating area of PV cells in solar energy storage system in constant current charging mode[J]. Power system technology, 2017, 41(2): 462-469.
[11] 荣雅君, 陈乐, 崔明勇, 等. 基于最大功率点跟踪的蓄电池充电控制策略[J]. 电网技术, 2014, 38(2): 347-351.
RONG Y J, CHEN L, CUI M Y, et al.A battery charging control strategy based on maximum power point tracking[J]. Power system technology, 2014, 38(2): 347-351.
[12] 廖小兵, 周自强, 乐健, 等. 考虑电池储能老化和需求侧响应的交直流混合配电网动态重构方法[J]. 电力系统保护与控制, 2023, 51(14): 43-54.
LIAO X B, ZHOU Z Q, LE J, et al.Dynamic reconfiguration of an AC/DC hybrid distribution network considering battery energy storage aging and demand response[J]. Power system protection and control, 2023, 51(14): 43-54.
[13] 易磊, 黄启元, 李嘉泽, 等. 基于MPPT的光伏蓄电池脉冲充电技术研究[J]. 电源技术, 2022, 46(4): 437-440.
YI L, HUANG Q Y, LI J Z, et al.Research on pulse charging technology of photovoltaic battery based on MPPT[J]. Chinese journal of power sources, 2022, 46(4): 437-440.
[14] 王伟, 戴朝华, 陈维荣, 等. 改进功率预测变步长扰动法在光伏MPPT中的研究[J]. 太阳能学报, 2022, 43(2): 217-225.
WANG W, DAI C H, CHEN W R, et al.Research on improved variable step perturbation algorithm for power prediction in photovoltaic MPPT[J]. Acta energiae solaris sinica, 2022, 43(2): 217-225.
[15] 贾科, 宣振文, 朱正轩, 等. 光伏直流升压接入系统故障穿越协同控保方法[J]. 电网技术, 2018, 42(10): 3249-3258.
JIA K, XUAN Z W, ZHU Z X, et al.A coordinated control and active protection for PV DC boosting integration system during FRT[J]. Power system technology, 2018, 42(10): 3249-3258.
[16] 周连俊, 李群, 殷明慧, 等. 面向风电机组最大功率点跟踪的转矩曲线增益动态优化[J]. 电工技术学报, 2023, 38(13): 3447-3458.
ZHOU L J, LI Q, YIN M H, et al.Torque curve gain dynamic optimization for maximum power point tracking of wind turbines[J]. Transactions of China Electrotechnical Society, 2023, 38(13): 3447-3458.
[17] 张东宁. 基于改进电导增量法的光伏最大功率点跟踪策略研究[J]. 太阳能学报, 2022, 43(8): 82-90.
ZHANG D N.Research on photovoltaic maximum power point tracking strategy based on improved conductance increment method[J]. Acta energiae solaris sinica, 2022, 43(8): 82-90.
[18] 解宝, 周林, 马卫, 等. 光伏并网逆变器的高增益数字PI控制器设计[J]. 太阳能学报, 2019, 40(9): 2586-2593.
XIE B, ZHOU L, MA W, et al.Design of high gain digital PI controller for PV grid-connected inverter[J]. Acta energiae solaris sinica, 2019, 40(9): 2586-2593.
[19] 汪红辉, 刘一凡, 储德韧. 不同荷电状态钛酸锂电池高温日历老化研究[J]. 储能科学与技术, 2023, 12(8): 2606-2614.
WANG H H, LIU Y F, CHU D R.Calendar aging of lithium titanate battery with different state of charge[J]. Energy storage science and technology, 2023, 12(8): 2606-2614.
[20] 刘忠, 张乐, 寇攀高, 等. 并网型风电-光伏-抽水蓄能-蓄电池系统容量优化配置[J]. 动力工程学报, 2023, 43(9): 1151-1159.
LIU Z, ZHANG L, KOU P G, et al.Capacity allocation optimization on grid connected system consisting of wind power, photovoltaic power, pumped storage and battery[J]. Journal of Chinese Society of Power Engineering, 2023, 43(9): 1151-1159.