Real-time maximum power point tracking method based on three points approximation by digital controller for PV system

Seung Tak Kim, Tae Ho Bang, Seong Chan Lee, Jung Wook Park

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

This paper proposes the new method based on the availability of three points measurement and convexity of photovoltaic (PV) curve characteristic at the maximum power point (MPP). In general, the MPP tracking (MPPT) function is the important part of all PV systems due to their powervoltage (P-V) characteristics related with weather conditions. Then, the analog-to-digital converter (ADC) and low pass filter (LPF) are required to measure the voltage and current for MPPT by the digital controller, which is used to implement the PV power conditioning system (PCS). The measurement and quantization error due to rounding or truncation in ADC and the delay of LPF might degrade the reliability of MPPT. To overcome this limitation, the proposed method is proposed while improving the performances in both steady-state and dynamic responses based on the detailed investigation of its properties for availability and convexity. The performances of proposed method are evaluated with the several case studies by the PSCAD/EMTDC® simulation. Then, the experimental results are given to verify its feasibility in real-time.

Original languageEnglish
Pages (from-to)1447-1453
Number of pages7
JournalJournal of Electrical Engineering and Technology
Volume9
Issue number5
DOIs
Publication statusPublished - 2014 Jan 1

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Low pass filters
Digital to analog conversion
Availability
Controllers
Dynamic response
Electric potential

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

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abstract = "This paper proposes the new method based on the availability of three points measurement and convexity of photovoltaic (PV) curve characteristic at the maximum power point (MPP). In general, the MPP tracking (MPPT) function is the important part of all PV systems due to their powervoltage (P-V) characteristics related with weather conditions. Then, the analog-to-digital converter (ADC) and low pass filter (LPF) are required to measure the voltage and current for MPPT by the digital controller, which is used to implement the PV power conditioning system (PCS). The measurement and quantization error due to rounding or truncation in ADC and the delay of LPF might degrade the reliability of MPPT. To overcome this limitation, the proposed method is proposed while improving the performances in both steady-state and dynamic responses based on the detailed investigation of its properties for availability and convexity. The performances of proposed method are evaluated with the several case studies by the PSCAD/EMTDC{\circledR} simulation. Then, the experimental results are given to verify its feasibility in real-time.",
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Real-time maximum power point tracking method based on three points approximation by digital controller for PV system. / Kim, Seung Tak; Bang, Tae Ho; Lee, Seong Chan; Park, Jung Wook.

In: Journal of Electrical Engineering and Technology, Vol. 9, No. 5, 01.01.2014, p. 1447-1453.

Research output: Contribution to journalArticle

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