Control strategy for extending operation rang of cascaded H-bridge photovoltaic inverter

被引：0

作者：

Xu J. ^{[1
]}

Zhang X. ^{[1
]}

Zhao T. ^{[1
]}

Jiang C. ^{[2
]}

机构：

[1] School of Electrical Engineering & Automation, Hefei University of Technology, Hefei

[2] Sungrow Power Supply Co., Ltd., Hefei

来源：

| 1600年 / Science Press卷 / 42期

关键词：

CHB; Over-modulation; Power imbalance; PV inverter;

D O I：

10.19912/j.0254-0096.tynxb.2018-1434

中图分类号：

学科分类号：

摘要：

Affected by partial occlusion or surface dust of modules, if the power difference among H-bridge units of cascaded H-bridge (CHB) photovoltaic (PV) inverter is large, the H-bridges with large powers may be over-modulation, resulting in distorted grid current and that the system cannot operate normally. Based on this, an improved third harmonic compensation strategy is proposed, which can ensure that the system operates at unity power factor under the heavy power imbalance conditions and the THD of grid current can meet the requirements. In addition, the simulation based on Matlab/Simulink and the digital prototype are built. The simulation and experimental results all verify the effectiveness of the proposed method. © 2021, Solar Energy Periodical Office Co., Ltd. All right reserved.

引用

页码：240 / 245

页数：5

共 15 条

[1]

CECATI C, CIANCETTA F, SIANO P., A multilevel inverter for photovoltaic systems with fuzzy logic control, IEEE transactions on industrial electronics, 57, 12, pp. 4115-4125, (2010)

[2]

XIAO B L, HANG L J, JUN M, Et al., Modular cascaded H-bridge multilevel PV inverter with distributed MPPT for grid-connected applications, IEEE transactions on industry applications, 51, 2, pp. 1722-1731, (2015)

[3]

CHAVARRIA J, BIEL D, GUINJOAN F, Et al., Energy-balance control of PV cascaded multilevel grid-connected inverter under level-shifted and phase-shifted PWMs, IEEE transactions on industrial electronics, 60, 1, pp. 98-111, (2013)

[4]

BABAEI E, LAALI S, ALILU S., Cascaded multilevel inverter with series connection of novel H-bridge basic units, IEEE transactions on industrial electronics, 61, 12, pp. 6664-6671, (2014)

[5]

YU Y, KONSTANTINOU G, HREDZAK B, Et al., Power balance of cascaded H-bridge multilevel converters for large-scale photovoltaic integration, IEEE transactions on power electronics, 31, 1, pp. 292-303, (2016)

[6]

VAZQUEZ S, LEON J, GALVAN E, Et al., Analysis of the power balance in the cells of a multilevel cascaded H-bridge converter, IEEE transactions on industrial electronics, 57, 7, pp. 287-2296, (2010)

[7]

REZAEI M A, FARHANGI S, IMAN-EINI H, Et al., Extending the operating range of cascaded H-bridge based multilevel rectifier under unbalanced load conditions, 2010 IEEE International Conference on Power and Energy, pp. 780-785, (2010)

[8]

IMAN-EINI H, SCHANEN J, FARHANGI S, Et al., A modular strategy for control and voltage balancing of cascaded H-bridge rectifiers, IEEE transactions on power electronics, 23, 5, pp. 2428-2442, (2008)

[9]

MORTEZA M, FARIVAR G, IMAN-EINI H, Et al., A voltage balancing strategy with extended operating region for cascaded H-bridge converters, IEEE transactions on power electronics, 29, 9, pp. 5044-5056, (2014)

[10]

ZHAO T, ZHANG X, MAO W, Et al., A modified hybrid modulation strategy for suppressing DC voltage fluctuation of cascaded H-bridge photovoltaic inverter, IEEE transactions on industrial electronics, 65, 5, pp. 3932-3941, (2018)

← 1 2 →