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Electrical distribution system is designed to operate in sinusoidal mode, but the voltage and current waveforms shows distortion compared to the sinusoidal mode. Current technology development, which results in an increasing adoption of the local generation and storage capacities, is pushing towards the adoption of smart grid paradigm. An effective technical solution for enforce limitation of various...
The advancements in technology and services are fundamentally transforming the traditional electrical power system operation. It is undergoing a full changeover into a collection of microgrids, which contains consumers that become prosumers. Energy storage is a vital component of the microgrids competitive operation. In this framework, current paper is addressing the issues of batteries capacity,...
Considering that the electrical power system is designed to operate in sinusoidal mode, the waveforms of voltage and current shows distortion compared to sinusoidal wave. For allowing limitation of all kinds of disturbance an effective technical solution is based on power electronics. The smart grid paradigm is encompassing an increasingly adoption of distributed generation all over the world. The...
The constant evolution of electricity grids towards smart grids is changing the paradigm. The intelligent layer which is added over the physical one is bringing a change in the mode in which the electricity is provided. Hence, the electricity providers are shifting their business from product-centered to service-centered ones, change that ensure a better use of their resources and a much wider acceptance...
The advancement of new storage technologies is a powerful driver for a wide smart grids adoption by both electricity utilities and customers. However, the relative novelty of these technologies is posing a threat to their adequacy for electric distribution systems operation. In spite of the clear advantages brought by storage devices, such as fast response, reserve, resilience, fault ride-through...
As a result of the changes that occur in the electrical distribution networks, there is guidance tendency toward users, not only to power systems. This is a feature of the smart grid that will ensure safety operational and power quality, and also facilitates network connection of renewable source. Smart grid can intelligently integrate the behavior of all users connected to this network — electricity...
The expansion of the electricity grid connected photovoltaic sources requires the development of solutions for solving problems caused by disturbances in the electrical network due to their strong variable character of energy sources. The power generation of grid-connected photovoltaic plants is increasing all over the world and these plants a crucial part of the future electric energy system. To...
This work is aimed at making a comprehensive evaluation of the probability density functions (PDFs) of a set of reliability indices applied to electricity distribution systems - including frequency and duration of interruptions, power and energy not supplied. By considering the number of occurrences and duration of the interruptions as random variables (RVs), the indices become RVs and are evaluated...
The new paradigm in which the electric power systems are developing, defined as smart systems, have a great impact on the consumers. By adopting distributed generation in an increasing proportion, they are becoming prosumers. The electricity market is therefore undergoing a structural change, in need to address the requirements of the prosumers. The market must address a vast array of topics, ranging...
The smart grid paradigm for the electric power systems is encompassing an increasingly adoption of distributed generation all over the world. This trend requires the input from flexible alternative current transmission systems (FACTS) devices, which can be used to increase transmission capacity, improving stability and dynamic behavior, and ensure a better quality of energy by controlling several...
The power systems sector is undergoing a complete overhaul to a smarter system, in which the consumers are becoming prosumers. Energy storage is a vital component of the smart grids that are currently being built around the world. These grids are designed to improve the reliability of electricity transmission and distribution, facilitate the integration of renewable energy generators and allow long...
Within the EU Directive 20-20-20, which imposed a decisive action towards renewable energy adoption within electric power systems, this change brought a series of issues for the electric power systems, like losses increase, reliability alteration and power quality depreciation. The power generation of grid-connected PV plants is increasing continuously all over the world reaching values of hundreds...
This work aims at resolving the issue of a model that uses symmetrical mathematical components, dedicated to longitudinal simple unbalance for three phase radial transmission electrical lines of an electricity distribution system. The symmetrical component of both current and voltage are obtained, as well as values of the electric distribution system parameters, in order to determine imbalance factors...
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