Quasi-Z-Source Inverter in Grid-Connected Photovoltaic System

被引：0

作者：

Wang Miao ^{[1
]}

Lu Ziguang ^{[1
]}

Hu Likun ^{[1
]}

Ding Aihua ^{[1
]}

Zhu Fei ^{[1
]}

机构：

[1] Guangxi Univ, Coll Elect Engn, Nanning 530004, Peoples R China

来源：

2013 32ND CHINESE CONTROL CONFERENCE (CCC) | 2013年

关键词：

quasi-Z-source inverter; shoot-through; grid-connected; constant capacitor's voltage; PSO; MPPT;

D O I：

暂无

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

This paper presents a three-phase grid-connected PV system based on quasi-Z-source inverter. With an unique impedanc network, Z-source inverter can utilize the shoot-through state to boost/buck the output voltage; Quasi-Z-source inverter not only inherits all the advantages of the Z-source inverter, but also has continuous input current (the voltage-fed type), and reduced passive component (capacitor) rating so as to decrease switching loss obviously. Compared with the traditional boost device, quasi-Z-source topology with MPPT has low cost, high efficiency and reliability. It is suitable for grid-connected photovoltaic (PV) power generation systems, where the input voltage varies in a wide range. The low harmonic current poured into grid is realized by the method of constant capacitor's voltage. And a reinitialized particle swarm optimization (PSO) algorithm is used to track maximum power point (MPP) accurately in varied environment. The simulated results verify that the PV system processes good steady and dynamic performance.

引用

页码：7595 / 7599

页数：5

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