An Improved MPPT Method for PV System with Fast-Converging Speed and Zero Oscillation

Xingshuo Li, Huiqing Wen, Lin Jiang, Weidong Xiao, Yang Du, Chenhao Zhao

Research output: Contribution to journalArticlepeer-review

98 Citations (Scopus)

Abstract

Maximum power point tracking (MPPT) is essential for photovoltaic (PV) systems to ensure the highest power output of PV arrays under any environmental condition. Comparing to other techniques, the Beta method shows advantages in terms of tracking speed, steady-state performance, and simple implementation. However, the conventional Beta can further be improved by minimizing oscillations around the maximum power point under a steady state and an increasing tracking speed in response to rapid changing of irradiance or temperature. An improved Beta-parameter-based MPPT method is proposed in this paper to achieve the above-mentioned objectives. An adaptive scaling factor is introduced and utilized in the MPPT mechanism, which enhances the tracking speed and is easily applied for any PV power system. Furthermore, the proposed method can identify and maintain the middle point of the three-level perturbations, which eliminate the oscillations at a steady state. The control mechanism is not limited by specific operating conditions and illustrates superior performance over traditional methods with regards to transient response and steady-state performance, which contributes to effective solar power harvesting. Followed by theoretical analysis, the simulation and experimental evaluation validate the claimed advantages of the proposed MPPT solution.

Original languageEnglish
Article number7542576
Pages (from-to)5051-5064
Number of pages14
JournalIEEE Transactions on Industry Applications
Volume52
Issue number6
DOIs
Publication statusPublished - 1 Nov 2016

Keywords

  • Fast-converging speed
  • Zero oscillation
  • maximum power point tracking (MPPT)
  • photovoltaic (PV) system

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