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...

Inverters with transformers of conventional type, connected in PV grid-tied generation systems have now being replaced by transformerless inverters due to various reasons such as reduction in size, weight and cost, improvement in efficiency etc. Transformerless inverters cause a number of technical challenges in grid-connected PV systems, among which flow of leakage currents is a major problem....

In this project a Microgrid consisting of different distributed generation (DG) units are presented. These distributed generation (DG) units are connected to the distribution grid. The distributed energy resources are necessary to saving the energy for future use. Here an Energy-management algorithm is implemented to coordinate the operations of the different DG units in the Microgrid for grid-...

Significant research attention is focused on the stability and control of voltage-source converters (VSCs) in weak ac grids. However, assessment VSC strategies has never been standardized, such that novel solutions proposed literature are not objectively evaluated against current best-practice. This paper establishes a comprehensive, standardized framework for grid-connected controllers, which ...

New perspectives for the electric vehicle (EV) operation in smart grids and smart homes context are presented. Nowadays, plugged-in EVs are equipped with on-board battery chargers just to perform the charging process from the electrical power grid (G2V – grid-to-vehicle mode). Although this is the main goal of such battery chargers, maintaining the main hardware structure and changing the digit...

This paper deals with one-phase faults on high voltage transmission lines and possible methods of utilization of the transmission capacity of the sound phases. If an AC power grid has interconnections with damaged or disconnected single phases, non-symmetrical currents arise in the system. These non-symmetrical currents must be eliminated to provide an acceptable and secure operation of the pow...