Design and experimental results of improved dynamic MPPT performance by EN50530

Photovoltaic (PV) system has been regarded as one of the most popular renewable energy sources due to its easy installation and safe operation. As one of the key control algorithms, maximum power point tracking (MPPT) function of PV inverter has been researched. Usually, its performance has been evaluated under a fixed environmental condition including irradiance and temperature. However, recently the dynamic MPPT performance under varying irradiance conditions has been paid attention to the PV society. As the European standard EN 50530, which defines the recommended varying irradiance profiles, was released lately, the corresponding researches have been required to improve the dynamic MPPT performance. This paper presents the design and experimental results of improved dynamic MPPT performance using dP P&O MPPT method, which is evaluated by EN 50530. By using 250kW PV inverter, the performance of dP P&O method is evaluated and compared with the conventional MPPT methods. The experimental results show that dP P&O method shows very high dynamic MPPT efficiency under EN 50530.