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基于高阶滑模观测器的并网光伏/电池系统超扭曲最大功率点跟踪控制

Super-twisting MPPT control for grid-connected PV/battery system using higher order sliding mode observer.

作者信息

Dunna Vijaya Kumar, Chandra Kumar Pakki Bharani, Rout Pravat Kumar, Sahu Binod Kumar, Manoharan Premkumar, Alsoud Anas R, Derebew Bizuwork

机构信息

Department of Electrical Engineering, ITER, Siksha 'O' Anusandhan (Deemed to be University), Bhubaneswar, 751030, India.

Department of EECE, and Center for Autonomous Systems, GITAM (Deemed to be University), Visakhapatnam, India.

出版信息

Sci Rep. 2024 Jul 18;14(1):16597. doi: 10.1038/s41598-024-67083-w.

DOI:10.1038/s41598-024-67083-w
PMID:39025968
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11258299/
Abstract

In recent times, photovoltaic (PV) power generation has been growing due to increase in energy demand. In grid-connected mode, achieving maximum power (MP) from the PV array is difficult by using conventional techniques due to various reasons like low tracking efficiency, stability issues, etc. This motivates the design of an appropriate control strategy to obtain the maximum power point tracking (MPPT) to harvest MP from the PV array. This paper proposes a combined higher order sliding mode observer (HOSMO)-super-twisting control (STC) for a grid-connected scenario. A perturb and observe (P &O) technique is employed to generate reference voltage, and a HOSMO is proposed to drive the STC by estimating the inductor current of the PV boost converter. The proposed controller performance is evaluated based on response time across various scenarios, including generation changes, dynamic faults, islanding and resynchronization, and load variations in comparison to other existing controllers. These microgrid test cases have been thoroughly simulated, and their effectiveness has been validated in real-time using OPAL-RT (OP4510).

摘要

近年来，由于能源需求的增加，光伏发电一直在增长。在并网模式下，由于诸如跟踪效率低、稳定性问题等各种原因，使用传统技术从光伏阵列获得最大功率（MP）是困难的。这促使设计一种合适的控制策略来实现最大功率点跟踪（MPPT），以便从光伏阵列获取最大功率。本文针对并网场景提出了一种组合的高阶滑模观测器（HOSMO）-超扭曲控制（STC）。采用扰动观察（P&O）技术来生成参考电压，并提出一种HOSMO通过估计光伏升压变换器的电感电流来驱动STC。与其他现有控制器相比，基于各种场景下的响应时间，包括发电变化、动态故障、孤岛和重新同步以及负载变化，对所提出的控制器性能进行了评估。这些微电网测试案例已经过全面模拟，并使用OPAL-RT（OP4510）进行了实时有效性验证。

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