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Renewable energy is the future of energy generation. As wind turbine is big part of this energy revolution, research of its impact to current electrical power grid is of paramount importance. Wind speed varies periodically and geographically. This variability of wind power generation needs to be compensated by the conventional generators. In doing so, the temperature of the generators increased in...
This paper presents results from case studies of the future power systems in Morocco and Egypt, with a high increase in renewable generation capacity. Datasets representing 2030 scenarios have been generated and studied with a simplified grid-market model that takes into account variable renewable generation, energy storage and electricity grid constraints. Simulation results for Morocco and Egypt...
This paper presents the steady-state performances of a self-excited induction generator under unbalanced conditions. Particular interest was given to an extreme unbalance condition where a three-phase induction generator is supplying a single-phase load. The computation approach used simplifies the mathematical equations governing the operation of the generator. The adopted model for the generator-load...
Increasing worldwide energy demand and well known pollution effects of fossil fuels, make necessary to develop new environmentally friendly energy generation systems such as wind energy. In this research a predictive current control with reactive power reduction is proposed for a six-phase energy generator — multi-modular matrix converter system. The proposal shows a significant harmonic reduction...
In this paper, a detailed model of a 2 MW wind turbine system with a permanent magnet synchronous generator (PMSG), including the aerodynamics, the mechanics, and the electrical domain is presented. It is then used to examine the influences of the level of detail in the model of a wind turbine system on the calculated lifetime consumption of the converter's power modules. This is done by comparing...
Wind energy is widely considered as a major source of clean energy. As such, wind turbines are becoming popular in the renewable energy world. The output of the wind turbine varies with randomly changing speed of the wind. This is a critical problem for wind turbines in general, and fixed speed wind generators in particular. However, conventional pitch controllers and governor control systems are...
The energy demands increment, perishing resources of fossil fuels and growing pollution levels encourage more electricity generation using renewable energy sources such as wind, solar, geothermal, tidal etc. Generation of electricity using high speed wind seems a viable and environment friendly solution to meet energy crisis. However, due to variable nature of wind speed, it is difficult to supply...
Popularity of the offshore wind farms in recent years has been increased because the wind resource in offshore is higher with uniform wind speed and availability of large sea area. Most of the offshore wind farms have MVAC (Medium voltage Alternating Current) distribution system. In this paper MVDC (Medium Voltage Direct Current) distribution system is proposed and the performance of this is compared...
The goal of this paper is to investigate the application of nonlinear control technique to a multi-input multi-output (MIMO) nonlinear model of a wind energy battery-storage system using a permanent magnet synchronous generator (PMSG). The challenge is that the system should operate in both grid-connected and standalone modes while ensuring a seamless transition between the two modes and an efficient...
This paper presents modeling and power quality analysis of an integrated renewable energy system (RES) aimed at supplying electrical power to communities residing at remote locations, far from the grid supply. A decentralized power generation in the form of integrated system is proposed comprising of a solar photovoltaic (PV) system, a wind energy system (WES) and a micro hydro system (MHS) to supply...
Electricity generation using renewable energy sources especially wind and solar photovoltaic is increasing rapidly and replacing fossil generation. The impact is more significant in small islanded networks which historically have relied on diesel engines for generation. Since wind and photovoltaic generation is intermittent and unpredictable, it becomes difficult to schedule and manage a small network...
This paper proposes a probabilistic optimal power flow (POPF) to evaluate the power system operation with renewable energy generation. Probability density functions (PDFs) are used to stochastically model the wind speed and load. A (2m+1)-point estimation considers the system uncertainties for power flow analysis. The proposed method incorporates energy storage into the POPF model to evaluate its...
This paper proposes a DC linked hybrid solar photovoltaic/wind energy system for stand-alone applications. Solar and wind energy are utilized as primary energy sources and battery unit is considered as storage to meet the primary load demand. Loads are considered according to their priority such as primary, deferrable and dump loads. Among these loads primary load is having highest priority. Ratings...
Electrical vehicles (EVs) have drawn much attention recently. The appropriate energy resource to charge EVs is one of the key factors in EVs' development. On the other hand, how to reduce abandoned wind energy is one of the main problems in wind power application. The conception and the benefits of “wind-EV complementation” are presented in this paper from the viewpoint of transmission grid. A mathematical...
This paper presents the modeling of wind energy systems using MATLAB Simulink. The model considers the MPPT (Maximum Power Point Tracking) technique to track the maximum power that could be extracted from the wind energy, due the non-linear characteristic of the wind turbine. The model consists of wind generation model, converter model (DC-DC converter), and MPPT controller. The main contribution...
Grid integration of wind power plants is complicated by a number of issues, primarily related to wind variability and the electrical characteristics of wind generators. Frequency control is a particularly significant issue with high levels of wind and solar penetration. A typical wind plant appears to the grid as a substantially different generation source than a conventional power plant. A significant...
Growing use of renewables pushes thermal generators against operating constraints — e.g. ramping, minimum output, and operating reserves — that are traditionally ignored in expansion planning models. We show how including such unit-commitment-derived details can significantly change energy production and optimal capacity mix. We introduce a method for efficiently combining unit commitment and generation...
The demand for energy in developing countries of the Caribbean region is increasing. Local environmental policy influence energy production and consumption, while the integration of renewable energy sources must reliably satisfy this increasing load demand economically. This paper uses auto-regressive modeling to assess the adequacy of potential sites for wind power generation. Monte Carlo Simulation...
The power of offshore wind turbines are expected to increase to 10 MW and more in the future. This will make today's technology unsuitable due to increased nacelle weight. Therefore, this work focus on a new modular converter solution, which designed specifically to a generator results in reduced nacelle weight. Additional benefits are redundancy and modularity in the converter.
This paper deals with the holistic modeling approach of a combined Photovoltaic, Wind and Fuel Cell power system. The method is using the DK5 modeling/design environment from Mentor Graphics and is based on the new Handel-C programming language. The goal of the work carried out was to achieve an optimized holistic digital control system design, followed by its rapid prototyping into a single Field...
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