A grid-connected PV power system total considers the MPPT and SSRF-SPLL control technologies

摘要

W artykule przedstawiono algorytm MPPT oparty na zmodyfikowanej metodzie perturbacji i obserwacji, umo?liwiaj?cy ?ledzenie punktu mocy maksymalnej zespo?u paneli PV w warunkach niejednorodnego nas?onecznienia i cz??ciowego zacienienia. W celu analizy dzia?ania systemu pod??czonego do sieci elektroenergetycznej, zastosowano algorytm synchronizacji fazowej PLL o pojedynczej ramce.%At present, an optimal maximum power tracking (MPPT) and grid-connected control methods for a PV power system are very important to improve the output efficiency. However, most of literatures only introduce the MPPT or PLL method, respectively. A novel MPPT method is proposed by improving the convention perturbation and observation (P&O) method in this paper, which can track the real peak of PV array at different irradiation and partial shading. To analyze the locked performance, the Single Synchronous Reference Frame Software Phase Locked Loop (SSRF-SPLL) is discussed at different grid faults such as single-phase voltage drop, two phase voltage drop, and frequency discontinuity.