Title :
Improved perturbation and observation method (IP&O) of MPPT control for photovoltaic power systems
Author :
Jung, Youngseok ; So, Junghun ; Yu, Gwonjong ; Choi, Jaeho
Author_Institution :
Korea Inst. of Energy Res., Daejeon, South Korea
Abstract :
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).
Keywords :
DC-DC power convertors; control engineering computing; digital signal processing chips; photovoltaic power systems; power engineering computing; power generation control; power system interconnection; solar cell arrays; 3 kW; DSP; MPPT control; PV array; adaptive algorithm; dc/dc boost converter; digital signal processor; grid-connected PV power systems; improved perturbation and observation method; maximum power point tracking; photovoltaic power systems; Adaptive algorithm; Automatic control; Bandwidth; Control systems; Hysteresis; Photovoltaic systems; Power generation; Power system control; Solar power generation; Temperature;
Conference_Titel :
Photovoltaic Specialists Conference, 2005. Conference Record of the Thirty-first IEEE
Print_ISBN :
0-7803-8707-4
DOI :
10.1109/PVSC.2005.1488498
