Seamless Transfer Method of MPPT for Two-stage Photovoltaic PCS

Jong-Hwa Park; Jongmin Jo; Hyunsung An; Hanju Cha

Seamless Transfer Method of MPPT for Two-stage Photovoltaic PCS

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태양광 발전 시스템의 무순단 MPPT 운전 모드 절체 기법

Type: Academic journal

Author: Jong-Hwa Park (충남대학교) Jongmin Jo (충남대) Hyunsung An (충남대) Hanju Cha (충남대학교)

Journal: The Korean Institute of Electrical Engineers The transactions of The Korean Institute of Electrical Engineers Vol.67 No.2 KCI Accredited Journals SCOPUS

Published: 2018.2

Pages: 233 - 238 (6page)

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Seamless Transfer Method of MPPT for Two-stage Photovoltaic PCS

Research history (3)

2018

Seamless Transfer Method of MPPT for Two-stage Photovoltaic PCS

Jong-Hwa Pa , k , Jongmin Jo and others 2 The transactions of The Korean Institute of Electrical Engineers 2018.02 Academic journal

박종화 전기공학과 2018.01 Thesis

2017

Seamless MPPT mode transfer method of two-stage Photovoltaic PCS

Jonghwa Pa , k , Jongmin Jo and others 2 대한전기학회 학술대회 논문집 2017.04 Proceeding

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This paper proposes a seamless MPPT operation mode transfer method of photovoltaic system. The photovoltaic system consists of a DC-DC boost converter, a DC-Link, and a 3-level neutral point clamp (NPC) type inverter. The PV voltage fluctuates due to the output characteristics of the solar pane1 depending on the irradiation amount and the temperature. The photovoltaic system requires seamless MPPT mode transfer method that the discontinuity does not occur in order to supply the stable power to system without affecting the fluctuation of the PV voltage. MPPT operation is divided into two modes by the voltage reference. Under the condition that the PV voltage is below 650V, the DC-DC boost converter performs MPPT through duty control based on perturb & observe (P&O) method, and the inverter conducts DC-link voltage and grid current controls in synchronous reference frame. On the other hand, when the PV voltage exceeds above 650V, inverter performs MPPT in accordance with the variation of DC-link voltage control while the converter stops operating. Two MPPT operation modes is smoothly transferred through the proposed method that DC-link voltage or grid current commands are appropriately adjusted from the certain criteria. The feasibility of the MPPT operation mode transfer method is verified using a 10kW solar photovoltaic system, experimental results have good performances that the fluctuation of PV current is reduced to 100%.

#Photovoltaic system #PV #PCS #MPPT #Seamless #Transfer method

Abstract
1. 서론
2. 태양광 발전 시스템의 구조
3. 태양광 발전 시스템의 MPPT 운전 모드 및 절체 기법
4. 실험 결과
4. 결론
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Ju-Yeop Choi, Gwon-Jong Yu, “Trends of Multifunctional and High Efficiency PCS Technology for Next Generation Distributed Power Supply Using Photovoltaic Power Generation”, The Transactions of the Korean Institute of Power Electronics, Vol. 8, No. 6, 35-39 [5pages], December 2003. Jae-Hwe Shim, Seung-Dae Yang, Seung-Hwan Jung, Ju-Yeop Choi, Ick Choy, Jin-Ung An, Dong-Ha Lee “Analysis of various MPPT algorithms for PCS”, Journal of the Korean Solar Energy Society, Vol. 31, No. 2, 16-21 [6pages], April 2011. Sanghoey Lee, Hanju Cha “Anaysis of Utility Interactive 3-phase Photovoltaic Power Conditioning System”, 2009 Summer The Korean Institute of Electrical Engineers, 14-17[4pages], July 2009. Riad Kadri, Jean-Paul Gaubert, Gerard Champenois, An Improved Maximum Power Point Tracking for Photovoltaci Grid-Connected Inverter Based on Voltage-Oriented Control, IEEE Tran. Industrial Electronics, Vol. 58, No. 1, 66-75, January 2011. Z. Salameh and D. Taylor, Step-up maximum power point tracker for photovoltaic arrays, Solar Energy, vol. 44, no. 1, pp. 57-61, 1990.

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