王辉

Optimization Design and Control of Single-Stage Single-Phase PV Inverters for MPPT Improvement

发布时间：2021-07-28

点击次数：

影响因子：6.153

DOI码：10.1109/TPEL.2020.2990923

发表刊物：IEEE Transactions on Power Electronics

关键字：Inverters; Capacitors; Maximum power point trackers; Voltage control; Power harmonic filters; Capacitance; Double-frequency ripple; maximum power point tracking (MPPT) performance improvement; parameter optimization design; second-order sliding mode control (SOSMC); single-stage single-phase photovoltaic (PV) system

摘要：Due to the inherent double-frequency (2f0) ripple in single-stage single-phase photovoltaic grid-connected inverters, the maximum power point tracking (MPPT) will inevitably be affected. To improve the MPPT performances, a passive LC power decoupling circuit with a robust second-order sliding-mode control (SOSMC) is thus proposed in this article. With the passive LC decoupling path, the double-frequency pulsation on the dc link is effectively cancelled out. Thus, the MPPT accuracy is significantly enhanced, and the utilization of a small dc-link capacitor becomes possible. However, resonance between the LC circuit and the main dc-link capacitor may appear, which can be damped through an active damping method. Additionally, the proposed SOSMC ensures good steady-state, dynamic performance (voltage fluctuation and settling time), and the robustness of the dc-link voltage, which is also beneficial to MPPT control in terms of high accuracy and fast dynamics. The systematic design of SOSMC is presented, and a detailed parameter optimization design of LC decoupling circuit is discussed. Experimental tests are performed on a 2.5-kW single-stage single-phase grid-connected inverter, and the results validate the effectiveness of the proposed strategy.

合写作者：Su, Mei, Wang, Hui, Liu, Bin, Zhang, Xin, Pou, Josep, Yang, Yongheng, Davari, Pooya

第一作者：Guo, Bin

论文类型：期刊论文

通讯作者：Sun, Yao

论文编号：20203509110990

学科门类：工学

一级学科：电气工程

卷号：35

期号：12

页面范围：13000-13016

ISSN号：08858993

是否译文：否

发表时间：2020-12-01

收录刊物：SCI、EI

发布期刊链接：https://www.engineeringvillage.com/search/doc/detailed.url?SEARCHID=03dcd92b361640be84cce8d7f980aa0e&DOCINDEX=1&database=16826499&pageType=quickSearch&searchtype=Quick&dedupResultCount=null&format=qui

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