Power Injection System for Grid-Connected Photovoltaic Generation Systems Based on Two Collaborative Voltage Source Inverters

Abstract

-This paper presents a new topology for the power injection system that is based on the parallel association of two voltage source inverters: one is operated using a quasi-square voltage waveform strategy and the other operates with a PWM based strategy. The aim of this topology is that the quasi-square inverter injects the power from the photovoltaic generation system and the PWM inverter controls the current quality. The proposal optimizes the system design, permitting reduction of system losses and an increase of the energy injected into the grid.

Grid-Connected Photovoltaic Plants: An Alternative Energy Source, Replacing Conventional Sources

“…PVGPs can generate a harmonic component to prevent the effects of the current harmonic produced by nonlinear loads connected to the grid, operating as integrated active power filters [42], [43], [50], [51]. PVGPs could even compensate current unbalance [50] or control the leakage or earth current [52], avoiding the propagation into the grid.…”

“…In some cases, dual or collaborative topologies are used, associating the different current components under control to different converters [50], [51].…”

Identification of Hammerstein-Weiner System for Normal and Shading Operation of PhotovoltaicSystem

“…Nowadays, installations of photovoltaic system incorporate with power electronics converter are growing tremendously. There are many [1][2][3] of topologies, techniques and approaches exist in developing architectural of photovoltaic system constructed with the converters to harvest maximum power point energy either during normal or shading condition. The system level examine is complex and difficult to analyse for real systems.…”

Architecture and Principles of Smart Grids for Distributed Power Generation and Demand Side Management

“…Nowadays the scale of integration of RES (renewable energy sources) as distributed power generation (Carrasco et al, 2006;Roman et al, 2006;Romero-Cadaval et al, 2009;Timbus et al, 2009;Cheng and Lataire, 2005) and plug-in HEVs (hybrid electric vehicles) as mobile loads [6] into the existing electric power networks is gradually increasing to target the goal of 20, 20 and 20. Due to the nature of intermittent power production of RES (e.g.…”