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In this paper, the control design of new Eco-friendly microgrid based on Wind/Diesel/Battery is investigated. Wind turbine (WT) driven variable speed permanent magnet brushless DC generator (PMBLDCG) is tied to the DC bus through three phase diode bridge rectifier and a DC/DC boost converter. Perturbation and observation technique (P&O) is used to achieve maximum power point tracking (MPPT) from...
In this paper, the Direct Torque Control (DTC) for three-level five-phase inverter fed five-phase induction motor is proposed to improve the low speed performance. The classic DTC method initiates flux demagnetization effect when the five-phase induction motor runs at low speed, especially below 5Hz. This classic DTC scheme is modified in order to minimize the demagnetization effect during low speed...
In this paper multilevel inverter is realized by two numbers of 3 phase two level voltage source inverter (VSI), connected in cascaded mode. The inverter is used to feed star connected squirrel cage induction motor through a 12 terminals transformer (primary windings are opened and secondary windings are connected in star). This power scheme is used to accommodate low dc voltage (which is in the order...
VSG (Virtual Synchronous Generator) is a control method for inverters that mimics both the steady-state droop characteristic and transient characteristic of Synchronous Generators (SGs). Because the steady states of VSG and droop controlled inverters are similar, the deviation of frequency and voltage amplitude also exists in the VSG. This paper proposes a new secondary control method mimicking the...
Conventional rotary electrical machines based power plants achieve good quality in power conversion due to the provision of smooth automatic generation control and voltage regulation. But, in case of renewable energy based microgrids, the inherent involvement of static power electronics based power conversion raises the issues of poor power quality and instability during uncertainties due to lack...
This paper investigates the performance of an asymmetrical six-phase induction machine fed by a six-phase nine-switch voltage source inverter under both healthy and open motor phase cases. In the literature, the nine-switch inverter topology is proposed as a suitable reduced switch-count converter topology for six-phase drives, where each pair of phases share the same converter leg. First, a brief...
This paper proposes a new direct torque control (DTC) method for a three-level neutral point clamped (3L-NPC) inverter-fed interior permanent magnet synchronous motor (IPMSM) drive. Theoretically, in comparison to a two-level inverter, a 3L-NPC inverter is advantageous for reducing the torque and flux ripples in DTC drives. Nonetheless, the ripples can still be excessive and detrimental if low switching...
In past 20 years, many countries are facing the crisis of energy shortage and environment pollution problems due to the large usage of gasoline vehicles. In order to improve the present situation, the design and manufacture of pure electric vehicles have been becoming to mainstream of the development of automobile industry in the world. High efficient switched reluctance motor (SRM) for electrical...
This paper presents behaviour of hybrid combination of solar and wind systems under steady state & dynamic state when connected to a remote single-phase load. Small-signal stability is analyzed to improve frequency and voltage variation. A battery arrangement is employed to amalgamate Wind synchronous generator (SG) with an AC-to-DC converter and a PV module. DC-to-DC boost converter is required...
This paper deals with the driver design for Brushless DC Motor (BLDCM) by quasi-sinusoidal voltage source inverter with voltage space vector pulse width modulation (VSVPWM) technology. Traditionally, BLDCM is driven by six-step inverter with digital Hall sensor feedback, and has the property of trapezoidal back EMF. However, this paper presents an approach to generate a quasi-sinusoidal voltage source...
The growth demand for energy and the depletion of fossil fuels leads researchers to develop alternative and sustainable energies sources such as solar and wind energies which have the largest potential in renewable energy. The aim of this paper is to provide solar and wind power to the utility grid. The proposed architecture of the hybrid system consists of Doubly Fed Induction Generator (DFIG) based...
The doubly fed induction generator (DFIG) is the most used technology when it comes to the production of the electric energy for wind power generation. It has the advantage to insure a variable speed operation that will maximize the power extracted from the wind, increase the energy efficiency, reduce the torque oscillations and to generate an electric power with better quality. When we talk about...
This paper deals with the problem of interfacing a wind turbine generator with an electrical three phase grid in the presence of nonlinear loads. Wind systems are generally connected to the grid through an AC/DC inverter in the generator side, followed by a DC/AC converter in the grid side. In this work, the considered DC/AC converter is based on multilevel neutral point clamped topology, and will...
This paper presents the experimental characterization of a wind turbine prototype used for micro wind farms. The proposed prototype, whose advantages can be summarized in versatility of application, low noise and compactness, can generate 1 kW of rated power for a wind speed equal to 4 m/s. The tests here reported and carried out by means of an experimental test bench confirm that the prototype is...
Due to automotive industrial constraints, the number of sensors on the electric powertrain has to be reduced. Thus, the stator phase currents of the wound rotor synchronous machine are not directly available and they have to be estimated. In this paper, different solutions of estimation are proposed. The first one is based on the extended Kalman filter, and the second one is a non-linear estimator...
This paper presents a symmetric winded PMSM which is connected by all in part coil to a supply system at low voltage of 48–100 V DC, developed by Research Center of Vehicle Industry in Szechenyi University. It has several benefits of this winding system its separate supply. The motor construction is slightly different from the general constructions; its running and control are different but on the...
The paper presents a novel robust field oriented vector control for induction generators. The proposed controller exploits the concept of indirect field orientation and guarantees asymptotic DC-link voltage regulations when DC-load is constant or slowly varying. An output-feedback linearizing Lyapunov's based technique is employed for the voltage controller design. Flux subsystem design provides robustness...
This paper presents the design approach of a power train used in an advanced high-lift system for future aircraft. Aircraft applications require an ultra-light and integrated design leading to an electrical machine with a high power to weight ratio of 2.82 kW/kg. To achieve additional high lift during take-off and landing, air is blown out at the back flaps of the aircraft wings using a turbo compressor...
The objective of this work is to study the performances of hybrid system comprising wind and photovoltaic sources with battery storage. The grid integration of the PV system is carried out via a three phase three level neutral point clamped (NPC) inverter. The interface of connection to the electrical supply network consisted of a continuous bus, filters RL, the regulation of the powers and the management...
In this paper, we propose a new strategy for Direct Torque Neural Network Control, compatible with a voltage inverter three level and exploit artificial intelligence tools namely: neural networks. In addition, the use of multi-level inverter and the artificial techniques contribute to improved performance of the control of the wind energy conversion system. In fact, the use of (multilevel converter)...
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