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The purpose of this paper is to test the algorithm of PWM with inverter non-idealities compensation and switching losses minimization on a model with various power directions and power factor. The PWM strategy implements simultaneous switching losses minimization and dead-time and voltage drop compensation. The operation of the algorithm is considered. Collisions between switching losses minimization...
Load profiling refers to a procedure which leads to the formulation of daily load curve and consumer classes regarding the similarity of the curves shapes. This procedure incorporates a set of unsupervised machine learning algorithms. Various researches propose clustering algorithms for grouping together load curves with high degree of similarity. K-means is the most common algorithm in the load profiling...
The measurement of the active and reactive power in three-phase circuits is a field considered closed, in which all the models have been exhausted, in which there are no other ways to investigate and innovate. These statements are generally accepted by the design engineers and viewed with reticence by a small number of researchers. This paper does not attempt to change these opinions so securely fixed...
This paper presents the study of a vacuum interrupter (VI) of 12kV, in terms of optimization of the electrical field in order to obtain a more uniform distribution inside the VI chamber. The proposed method consists in combining the construction and simulation programs in a Solid Works module, respectively ComsolMultiphisics, with the optimization module that includes the programming environment Matlab...
Wind energy has become a good alternative to diversification and expansion of the Brazilian electric matrix. However, the random nature of the wind speed makes its forecast complex, directly affecting the planning and operation of generation systems. For a proper integration, it is necessary to formulate the prediction of resources available through reliable methodologies. Currently, there are several...
The German Energy Transition puts enormous pressure on the existing grid operation and planning. At the same time, battery technology is developing rapidly and has the potential to reduce stress on the grid and increase the profitability of renewable energies if implemented in a market that provides sufficient revenues. The motivation behind this paper was to take most recent developments in the price...
Presents the introductory welcome message from the conference proceedings. May include the conference officers' congratulations to all involved with the conference event and publication of the proceedings record.
Unified power quality conditioner (UPQC) consists of combined shunt and series active power filters for improving both the power quality on the source side and on the load side. The paper presents a simple method for controlling the series filter under unbalanced and distorted load conditions by using a three phase locked loop (PLL). Two methods for controlling the shunt filter are analyzed. The model...
This paper develops a mathematical model for optimal capacitor placement and sizing in radial distribution systems. The optimization model finds placement and sizes of capacitors considering variations on load profiles with 15-minute resolution. A recently developed heuristic algorithm, Moth-flame Optimization Algorithm, is modified and used to solve the model. Optimization model is tested on a modified...
Developing offshore wind farms are becoming a more attractive solution nowadays. For preventing the changes of the climate, the world leaders have set some environmental goals, which will be difficult to reach out without RES production and the removal of production units with very high emissions. In this paper has been analyzed the possibility to install an offshore wind farm under two constructive...
The problem of reducing electricity consumption by using energy saving lamp type LED (Light-Emitting Diode), CFL (Compact fluorescent lamp) or UV (Ultra Violet) took unprecedented proportions in all EU countries. Compared to traditional incandescent lamp, the advantages of energy saving lamps in terms of efficiency that the environmental impact is undisputed. We find this type of energy saving lamps...
This paper deals with implementing an internal model control strategy for Maximum Power Point Tracking (MPPT) of a stand alone solar Photo Voltaic (PV) system in order to enhance its efficiency. For the modeling process, 80W standalone solar PV system was considered. In order to improve the performance, the control strategy follows the maximum power point output.
This paper refers to the magnetic actuator from vacuum circuit breaker. The actuator is one of the main component with functions for switching, latching and release. Due to the low quality of power supply of actuator, undesirable effects such as the delay during the operation of connecting or disconnecting the circuit breaker can result. As case of study to observe this delay was used a monopolar...
Energy policies of today put considerable pressure on operators to eliminate losses that appear in the process of delivering electricity. Together with a new view of what a distribution network should represent, it is clear that classic distribution methods need to become smart grids. A system that responds to changing requirements in terms of energy consumption becomes more and more attractive. This...
Increasing the number of electric/electronic devices powered with electric power, has led to a series of different chargers and a mixture of wires spread through the house or office. For a long period of time, the concept of charging without any direct connection through wires was avoided, but the last few years show an increased interest to make the loading with electrical power more flexible and...
Due to ongoing push of technology to smaller dimensions and higher computational speed of the electronic devices, a higher heat generation on device is obtained, increasing the thermal management challenges. This paper proposes a study of the electro-thermal behavior in electronic power devices and the optimization of the cooling system in order to increase the lifetime of the device. Different heat-sink...
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