Power smoothing by controlling stored energy in capacitor of photovoltaic power system

Junichi Arai, Tsuyoshi Takada, Kaoru Koyanagi, Ryuichi Yokoyama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Installation of the photovoltaic power system on the roof of houses is increasing rapidly. The photovoltaic power system has two typical problems, one is large power output change depending on climate change, and the other is over voltage in distribution line due to reverse power flow. These problems will be remarkable subjects for large amount of installation of photovoltaic power system in near future. This paper discussed countermeasures for these problems. We propose an output power smoothing method that a dc capacitor is assumed and stored energy is controlled to make the output smooth, an idea for determining the capacity of the capacitor based on measured data is explained. We also propose a flexible control for a photovoltaic power system with active power and reactive power controls against conventional one that has constant unity power factor, because reactive power is able to contribute over voltage suppression in distribution line. Proposed controllers are applied to a photovoltaic power system for a single phase ac output with three wires, and performance is confirmed by ATPDraw simulation.

Original languageEnglish
Title of host publicationAsia-Pacific Power and Energy Engineering Conference, APPEEC
DOIs
Publication statusPublished - 2012
Event2012 Asia-Pacific Power and Energy Engineering Conference, APPEEC 2012 - Shanghai
Duration: 2012 Mar 272012 Mar 29

Other

Other2012 Asia-Pacific Power and Energy Engineering Conference, APPEEC 2012
CityShanghai
Period12/3/2712/3/29

Keywords

  • Control
  • Inverter
  • Photovoltaic power system
  • Renewable energy
  • Smoothing

ASJC Scopus subject areas

  • Energy Engineering and Power Technology

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    Arai, J., Takada, T., Koyanagi, K., & Yokoyama, R. (2012). Power smoothing by controlling stored energy in capacitor of photovoltaic power system. In Asia-Pacific Power and Energy Engineering Conference, APPEEC [6307153] https://doi.org/10.1109/APPEEC.2012.6307153