Fırçasız doğru akım motoru ile gerilim kontrollü fotovoltaik pompa sistemi

Many developments have taken place in the field of renewable energy over the past decade, with a large percentage of research activities being oriented towards solar energy. We have seen the rise of grid connected photovoltaic systems as well as standalone PV systems. Standalone systems have gained vast implementation in remote locations where the grid is unavailable for applications such as irrigation schemes in domestic applications, however, unlike grid connected systems that are linked with the network bus voltage, standalone solar systems present undesirable complications in terms of stability. This thesis seeks to address this problem by developing and investigating a proposed optimal design of standalone photovoltaic pumping system. This study has made use of the brushless DC motor (BLDC) which has over the years proven to be a good substitute to the traditional brushed DC motors and the induction motors. The aim was to solve the problem of controllability of the pump speed while utilizing the maximum possible power from the PV array. This thesis proposed a two-stage PV system comprising of a primary DC stage for maximum power point tracking and a secondary AC stage dedicated for voltage regulation. For the DC stage, a Buck-Boost converter was used and for the AC stage, a full H bridge inverter was utilized.