Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Gird-interactive PV Generation System with Power Quality Control

전력품질개선기능을 갖는 계통 연계형 태양광 발전시스템

  • Lee, Seong-Ryong (School of Electronic & Information Eng. Kunsan National University) ;
  • Jeon, Chil-Hwan (School of Electronic & Information Eng. Kunsan National University) ;
  • Ko, Sung-Hun (School of Electronic & Information Eng. Kunsan National University) ;
  • Cho, Ah-Ran (School of Electronic & Information Eng. Kunsan National University)
  • 이성룡 (군산대학교 공과대학 전자정보공학부) ;
  • 전칠환 (군산대학교 공과대학 전자정보공학부) ;
  • 고성훈 (군산대학교 공과대학 전자정보공학부) ;
  • 조아란 (군산대학교 공과대학 전자정보공학부)
  • Published : 2006.07.12
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Abstract

This paper presents a grid-connected photovoltaic (PV) system with direct coupled power quality control (PQC) algorithm, which uses an inner current control loop (PRT : polarized ramp time) and outer feedback control loop to improve grid power quality and maximum power point tracking (MPPT) of PV arrays. To reduce the complexity, cost and number of power conversions, which results in higher efficiency, single stage CCVSI (Current Controlled Voltage Source Inverter) is used. The proposed system operation has been divided into two modes (sunny and night). In night mode, the proposed system operates to compensate the reactive power demanded by nonlinear or variation in loads. in sunny mode, the proposed system performs PQC to reduce harmonic current and improve power factor as well as MPPT to supply active power from the PV arrays simultaneously. it is shown that the proposed system improves the system utilization factor to 100% which is generally low for PV system (20%). To verify the proposed system, a comprehensive evaluation with theoretical analysis and simulation results are presented.

Keywords