Harmonics suppression for single-phase grid-connected PV systems in different operation modes

Yang, Y., Zhou, K. and Blaabjerg, F. (2013) Harmonics suppression for single-phase grid-connected PV systems in different operation modes. In: 28th Annual IEEE Applied Power Electronics Conference and Exposition (APEC 2013), Long Beach, CA, USA, 17-21 Mar 2013, pp. 889-896. ISBN 9781467343541 (doi: 10.1109/APEC.2013.6520316)

Abstract

As the penetration of grid-connected photovoltaic (PV) systems is booming, specific grid demands are imposed on such interconnected PV systems. Therefore, achieving high reliable PV systems with high power quality is of intense interest. However, the injected current from single-phase grid-connected PV inverters may be severely affected in different operation modes. In this paper, a detailed analysis is conducted to reveal the relationship between the harmonics level with the power factor and the current level in the PV systems. A current control solution which employs an Internal Model Principle (IMP) is proposed to suppress the harmonic currents injected into the grid. Experiments are carried out to verify the analysis and the performance of the proposed control method. It is demonstrated that the proposed method presents an effective solution to harmonics suppression for single-phase grid-connected PV systems in different operation modes. Especially, it can remove higher order harmonics effectively leading to a better power quality compared to the Proportional plus Multi-Resonant Controller, and it has less computational burden.

• Item Type: Conference Proceedings
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Zhou, Dr Keliang
• Authors: Yang, Y., Zhou, K., and Blaabjerg, F.
• Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• ISSN: 1048-2334
• ISBN: 9781467343541