A hybrid modulation scheme for grid-connected photovoltaic systems

Author

Zheng, Xu ; Hui, Wang ; Youchun, Li

Author_Institution

Nat. Key Lab. of Power Syst. in Shenzhen, Tsinghua Univ. in Shenzhen, Shenzhen

fYear

2008

fDate

6-9 April 2008

Firstpage

2707

Lastpage

2711

Abstract

Both unipolar and bipolar modulation schemes are widely used in single-phase grid-connected H-bridge inverters. This paper makes a comprehensive comparison between the aforementioned modulation strategies in aspects of basic switching action and key points, effects on operation mode, current harmonics and efficiency et al. Furthermore, a novel hybrid modulation scheme with the fusion of the unipolar and bipolar modulations is proposed in this paper. Numerical and experimental results are given to demonstrate the effectiveness and validity of the proposed method.

Keywords

bridge circuits; invertors; photovoltaic power systems; power grids; power system interconnection; grid-connected photovoltaic systems; hybrid modulation scheme; single-phase grid-connected H-bridge inverters; unipolar-bipolar modulation schemes; Diodes; Large-scale systems; Photovoltaic systems; Power generation; Pulse width modulation; Pulse width modulation converters; Pulse width modulation inverters; Solar energy; Solar power generation; Topology; H-bridge topology; bipolar modulation; grid-connected photovoltaic system; hybrid modulation; inverter; unipolar modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Electric Utility Deregulation and Restructuring and Power Technologies, 2008. DRPT 2008. Third International Conference on

Conference_Location

Nanjuing

Print_ISBN

978-7-900714-13-8

Electronic_ISBN

978-7-900714-13-8

Type

conf

DOI

10.1109/DRPT.2008.4523870

Filename

4523870