论文信息 - Improved perturbation and observation method (IP&O) of MPPT control for photovoltaic power systems

Improved perturbation and observation method (IP&O) of MPPT control for photovoltaic power systems

Maximum power point tracking (MPPT) is used in photovoltaic (PV) system to maximize the PV array output power irrespective of temperature and irradiation conditions. In this paper, an improved perturbation and observation method (IP&O) based on adaptive algorithm is proposed, which is automatically adjusts the reference step size and hysteresis bandwidth for power comparison. The digital signal processor (DSP) was used to implement the proposed MPPT control system, which controls the dc/dc boost converter in the 3 kW grid-connected PV power systems. The experimental results show that the IP&O increases the total PV output power by 0.5% at an unsettled weather condition compare to traditional perturbation and observation method (P&O).

J. So | Youngseok Jung | Gwonjong Yu | Jae-Ho Choi

[1] K. Uezato,et al. Maximum power point tracker using fuzzy control for photovoltaic arrays , 1994, Proceedings of 1994 IEEE International Conference on Industrial Technology - ICIT '94.

[2] Tsutomu Hoshino,et al. Maximum photovoltaic power tracking: an algorithm for rapidly changing atmospheric conditions , 1995 .

[3] Jongrong Lin,et al. Implementation of a DSP-controlled photovoltaic system with peak power tracking , 1998, IEEE Trans. Ind. Electron..

[4] Kostas Kalaitzakis,et al. Development of a microcontroller-based, photovoltaic maximum power point tracking control system , 2001 .

[5] Weidong Xiao,et al. A modified adaptive hill climbing MPPT method for photovoltaic power systems , 2004, 2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551).