Performance Analysis and Islanding Detection of 3-Phase 1500V dc Grid Inverter

摘要

The solar energy obtained from PV cell is a promising technology which is connected to grid through inverter. Large scale photovoltaic plants increase the impact of losses due to increased requirement of related equipments, while transmitting it in both dc and ac forms. This limits the competitiveness of photovoltaic technology to large power generation plants. IEC standards for low voltage cover upto 1500V, utilising this maximum limit allows considerable reduction in current and system losses in inverter. The foremost requirement of grid connected inverter is that it should disconnect from electrical power system in electric island formation. This paper unveil performance analysis of 3-Phase(3-Ph) grid inverter with variable load conditions and islanding detection based on frequency jump measurement. Performance analysis include active-reactive power control with variable load and loss analysis with variable switching frequency. The effectiveness of the designed 3-Ph grid connected inverter is tested using MATLAB/Simulink and PLECS simulation.