Because of installation for local consumers and since it is free of all contaminations, connecting photovoltaic cells to the grid via single-phase inverter is significantly on the rise. In this paper, a new simple current control is proposed for a single-phase grid-connected voltage source inverter. Using the PQ theory and modelling a single-phase system as an unbalanced three-phase system, a m...

The number of installations of photovoltaic solar panels and associated inverter systems within residential premises is increasing. As these systems incorporate a power electronics front end, they will have an influence on the quality of supply in regards to voltage harmonics. This paper investigates the harmonic impact on an 11kV distribution system due to the installation of residential type ...

In today’s and future’s electrical power grid system, regenerative energy sources like photovoltaic (PV) power systems consisting of PV panels and grid-connected inverters are very popular in domestic as well as in commercial power plants. High competitive pressure among PV power system providers due to cut inverter’s costs can be observed. Therefore different technical approaches have to be ev...

Received Jul 8, 2014 Revised Oct 6, 2014 Accepted Oct 20, 2014 Renewable power generation using photovoltaic is very interesting to be developed to deal with the problems of conventional energy sources and environmental issues. The photovoltaic power generation can operate both in stand-alone and grid-connected operations. This paper presents an application of the single-phase five-level common...

 The resonance between power-factor-correction capacitors and the line reactance is a common cause for harmonic problems in traditional power systems. Grid-connected inverters integrating renewable energy sources into the grid exhibit capacitive output impedance at harmonic frequencies and may also resonate with the grid impedance. In addition to possible amplification of current and voltage ...

In a conventional grid connected photovoltaic system employing centralized inverter with long strings connected across dc-link, the performance of the plant in terms of power generation and efficiency is not optimal especially during partial shading and/or panel mismatch conditions. To improve the power yield during such conditions, a splitmultistring configuration employing 3Level Neutral Poin...

This paper presents a single phase five level photovoltaic (PV) inverter topology for grid connected PV systems with a novel Pulse Width Modulated (PWM) control scheme. Two reference signals identical to each other with an offset equivalent to the amplitude of the triangular carrier signal were used to generate PWM signals for the switches. A digital Proportional-IntegralDerivative (PID) curren...

-------------------------------------------------------------------------------------------------------------------------------------------------Abstract –This paper demonstrates the functions of a dual voltage source inverter (DVSI) to improve power quality and reliability of the microgrid system using instantaneous symmetrical component theory (ISCT). The proposed DVSI scheme consists of two ...