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基于全局预定时间终端滑模控制的独立光伏MPPT

来源：电工电气发布时间：2023-04-26 10:26 浏览次数：230

基于全局预定时间终端滑模控制的独立光伏MPPT

王琰¹，刘崇新²

(1 国网江苏省电力有限公司无锡供电分公司，江苏无锡 214000；

2 西安交通大学电气工程学院，陕西西安 710049)

摘要：基于 PID 控制的传统最大功率点跟踪 (MPPT) 的速度较慢，且在光照、负载迅速变化时往往会发生振荡，可能导致 MPPT 失败。为了提高 MPPT 的速度，改善 MPPT 的动态性能，将预定时间稳定性理论引入独立光伏 MPPT 中，建立了独立光伏系统模型，并通过变步长扰动观察法确定参考电压，基于李雅普诺夫稳定性理论，设计了全局预定时间终端滑模控制器，在预定时间内完成对参考电压的追踪并实现 MPPT。通过仿真结果表明：提出的控制方法不仅能准确地在预定时间实现 MPPT，还具备优良的动态性能和较强的鲁棒性；预定时间终端滑模控制器有助于系统在光照、负载发生大扰动时迅速、平滑地实现 MPPT，具有较好的工程实际价值。

关键词： 预定时间控制；滑模控制；最大功率点跟踪；独立光伏系统

中图分类号：TM615 ；TM914.4 文献标识码：A 文章编号：1007-3175(2023)04-0006-06

Global Predefined Time Terminal Sliding Mode Control for

MPPT in a Stand-Alone Photovoltaic System

WANG Yan¹, LIU Chong-xin²

（1 State Grid Jiangsu Electric Power Co., Ltd. Wuxi Power Supply Company, Wuxi 214000, China;

2 School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China）

Abstract: The traditional Maximum Power Point Tracking (MPPT) based on PID control has slow speed and tends to oscillate during the rapid change of light and load, which may lead to the failure of MPPT. To solve these problems, the paper introduces the predefined time stability theory to MPPT of a stand-alone photovoltaic system. It first establishes a stand-alone photovoltaic system model and determines the reference voltage through variable step perturbation and observation method. Then based on the Lyapunov stability theory, a global predefined time terminal sliding mode controller is designed to track the reference voltage and complete MPPT within the predefined time. The simulation results show that this control method not only completes MPPT within the predefined time, but also has excellent dynamic performance and strong robustness. Besides, the predefined time terminal sliding mode controller is helpful for the system to complete MPPT fast and smoothly during the rapid change of light and load, verifying its great engineering application.

Key words: predefined time control; sliding mode control; maximum power point tracking; stand-alone photovoltaic system

参考文献

[1] THANG T V, AHMED A, KIM C, et al.Flexible System Architecture of Stand-Alone PV Power Generation with Energy Storage Device[J].IEEE Transactions on Energy Conversion，2015，30(4)：1386-1396.

[2] LU S,WANG Y,ZHU Z,et al.Fixed-Time Nonsingular Terminal Sliding Mode Control for MPPT in Stand-Alone Photovoltaic Systems[C]//2019 Chinese Automation Congress (CAC)，2019：3153-3157.

[3] JIANG P,ZHANG W,JIN Z.Photovoltaic Array MPPT Based on Improved Perturbation Observation Method[C]//2018 Chinese Automation Congress(CAC)，2018：1206-1210.

[4] 郑含博，杜齐，郭文豪，等. 应用于光储系统中的改进型扰动观察 MPPT 算法[J] . 控制理论与应用，2022，39(3)：491-498.

[5] 周东宝，陈渊睿. 基于改进型变步长电导增量法的最大功率点跟踪策略[J] . 电网技术，2015，39(6)：1491-1498.

[6] 李孝禄，王鑫，方晓敏，等. 基于滑模控制的光伏系统 MPPT 控制策略[J] . 太阳能学报，2018，39(10)：2843-2850.

[7] 邵文权，王猛，吴朝俊，等. 基于改进滑模控制的光伏系统 MPPT 控制策略[J] . 太阳能学报，2021，42(10)：87-93.

[8] PRADHAN R , SUBUDHI B . Double Integral Sliding Mode MPPT Control of a Photovoltaic System[J].IEEE Transactions on Control Systems Technology，2016，24(1)：285-292.

[9] ZHU Y, FEI J.Adaptive Global Fast Terminal Sliding Mode Control of Grid-Connected Photovoltaic System Using Fuzzy Neural Network Approach[J].IEEE Access，2017，5：9476-9484.

[10] DHAR S, DASH P K.A New Backstepping Finite Time Sliding Mode Control of Grid Connected PV System Using Multivariable Dynamic VSC Model[J].International Journal of Electrical Power & Energy Systems，2016，82：314-330.

[11] MENG Z, SHAO W, TANG J, et al.Sliding-Mode Control Based on Index Control Law for MPPT in Photovoltaic Systems[J].CES Transactions on Electrical Machines and Systems，2018，2(3)：303-311.

[12] ZHU Z , LU S , CHANG X , et al . Fixed-Time Nonsingular Backstepping Control of Photovoltaic Systems[C]//2019 Chinese Automation Congress(CAC)，2019：3216-3221.

[13] NI J, LIU L, TANG Y, et al.Predefined-Time Consensus Tracking of Second-Order Multiagent Systems[J].IEEE Transactions on Systems，Man，and Cybernetics:Systems，2021，51(4)：2550-2560.

[14] SANCHEZ-TORRES J D,GOMEZ-GUTIERREZ D,LOPEZ E,et al.A Class of Predefined-Time Stable Dynamical Systems[J].IMA Journal of Mathematical Control and Information，2017，35(1)：1-29.

[15] SANCHEZ-TORRES J D, SANCHEZ E N, LOUKIANOV A G.Predefined-Time Stability of Dynamical Systems with Sliding Modes[C]//2015 American Control Conference(ACC)，2015：5842-5846.

[16] ZUO Z.Non-Singular Fixed-Time Terminal Sliding Mode Control of Non-Linear Systems[J].IET Control Theory & Applications，2015，9(4)：545-552.

[17] ZUO Z, TIE L.Distributed Robust Finite-Time Nonlinear Consensus Protocols for Multi-Agent Systems[J].International Journal of Systems Science，2016，47(6)：1366-1375.

[18] 张超，何湘宁，赵德安. 光伏发电系统变步长 MPPT 控制策略研究[J]. 电力电子技术，2009，43(10)：47-49.

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基于全局预定时间终端滑模控制的独立光伏MPPT