This paper presents the simulation model of a 3.5 kW PV array followed by a boost converter, which boost up the output voltage of the PV array. Maximum power point tracking (MPPT) can effectively improve the solar energy conversion efficiency of PV array, in this paper perturband – observe (P&O) algorithm has been used to achieve this function. Grid connected PV system needs a three phase inver...

In this paper, a cascaded current–voltage control strategy is proposed for inverters to simultaneously improve the power quality of the inverter local load voltage and the current exchanged with the grid. It also enables seamless transfer of the operation mode from standalone to grid-connected or vice versa. The control scheme includes an inner voltage loop and an outer current loop, with both ...

with conventional control strategy under unbalanced grid conditions, power fluctuations will be generated in the input active power and reactive power of the wind power Grid Connected Inverter (GCI). In this paper, a novel sequence extraction method is proposed in the voltage components decomposition. Based on second order generalized integrator (SOGI) with PLL, a decomposition module with an a...

Z-source inverter takes advantage of a distinctive impedance source network and modulation method of shootthrough vector, and achieves the function of buck/boost DC AC inverter in the single stage system at the same time, which is suitable for grid-connected PV systems with large input voltage variations. The purpose of this study is to draw a unified method of shoot-through vector and grid inv...

In this paper, an advance repetitive control method (RCM) for fuzzy current control based grid connected inverter with a frequency adaptive capability is proposed. The main objective of the proposed scheme is to reduce total harmonic distortion (THD) such that by changing the FIR filter according to varied grid frequency and keeps the resonant frequencies fitting the grid fundamental and harmon...

Off-Grid is a part of the power distribution system which uses renewable energy based of power generation connected to the grid system. Power generation of multi energy is composed of renewable energy systems including photovoltaic, wind turbine, energy storage and local loads. Test bed of an OffGrid system is the technique to ensure stable operation during faults and various network disturbanc...

This project presents the operation of a distributed generation (DG) system driven by a dcdc step-up converter and a dc-ac voltage source inverter (VSI) interfaced with the power grid by Fuzzy Controller. To create a stable mode when different kinds of loads are connected locally or when working under contingency, the step-up converter must regulate the dc link voltage, allowing the VSI to stab...