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The current characteristics of two types of parallel three-phase voltage source inverter configurations are analyzed, and the suitability of different pulse width modulation methods in the control of parallel inverters is discussed. The analysis and discussion are based on state-space models derived in this paper and presented for the parallel connection of n units. For the sake of repeatability,...
This work deals with a parametric identification using the least square method based on the output error. An appropriate particle swarm optimization algorithm is applied as a technique to minimize the objective function in order to obtain simultaneously the electrical and the mechanical parameters. The validation and comparison of the two algorithms used are obtained from experiments carried out on...
The optimal operation of a rail vehicle with on-board energy storage device minimizing energy consumption in catenary free mode is discussed in this paper. The electric double layer capacitor (EDLC) is assumed as an energy storage device because of its high power density, long lifetime and quick charge/discharge. The proposed method can determine the optimal acceleration/deceleration at each sampling...
In this paper, a 600 KW electrical balance of plant (EBOP) for a molten carbonate fuel cell (MCFC) power plant is introduced. The requirements for EBOP are categorized into as follows : demands on grid interconnection and operational interface with a fuel cell. EBOP has three modes of operation, i.e. grid-connected (GC) mode, grid-independent (GI) mode, and grid-synchronization (GS) mode, to control...
This paper presents a maximum power point tracking (MPPT) method which is applied on a wind turbine with permanent magnet synchronous generator (PMSG). A three-phase switched mode rectifier (SMR) is connected with the three phase output of the PMSG. The SMR employs a modulation strategy which is based on the space vector modulation (SVM) technique. Thus, the three phase input voltage is divided in...
The main novelty in this paper is modeling with PSPICE the real stored charge inside SiC PIN diodes depending on the working regime of the device (turn-on, on-state, and turn-off). The developed model is based on the adequate calculation of the ambipolar length (L) as a function of the charge injected to the N- region, which allows finding an analytical solution for the ambipolar diffusion equation...
The present paper addresses the control of a piezoelectric actuator considering its hysteresis. Hysteresis is represented using the Bouc-Wen model. A time-varying PID controller is designed for micropositionning purpose. The controller is evaluated using numerical simulations based on experimental data obtained from a piezoelectric actuator.
This paper presents the desired current references in order to minimize the torque ripple for a Switched Reluctance Motor. From the torque equation, and using switch on and switch off angles, the desired current waveforms are obtained. Simulations validates the study and are compared with the constant current references case.
The comparison of inductive and capacitive filter for standalone variable speed operated doubly fed induction generator DFIG is presented in the paper. Simulation and experimental results of both methods of filtration are shown. The model equations with stator connected filtering capacitors are analyzed. Sensorless control of the stator voltage vector in the polar frame is described. PLL based frequency...
The importance of condition monitoring and fault detection increases. This paper presents a state-space observer based condition monitoring algorithm for the detection of rotor turn-to-turn faults in doubly-fed induction generators. A reduced order time invariant machine model for asymmetrical internal parameters will be derived. The model is used for simulation of rotor turn-to-turn faults, which...
The paper deals with the automatic generation of global model of static converters without the description of their environment. The considered models are average and exact models (i.e. with ideal switches). These models are obtained by using a software tool named AMG (for Average Model Generator) with a priori on the control mode and behaviour of the static converter. In this paper, an extension...
This paper describes the modelling and control of a micro-wind generation system, based on an axial flux permanent magnet synchronous generator (PMSG), for isolated low power DC micro grids. The system consists of a micro-wind turbine including a furling tail, a PMSG, a three phase diode rectifier and a buck converter connected to a battery bank and a load. Furthermore, it incorporates a control system...
To increase the clean and renewable energy used presently, energy could be extracted from the sea. Here an Archimedes wave swing (AWS) park is proposed to convert the motion of the sea waves into electricity with a capacity of 90 MW. In order to find the most suitable way to connect these devices, various electrical components are used which need to be modeled precisely to carry out the calculations...
Recent innovation in vehicle systems has brought the extensive application of power electronics (PE) technology, which in turn has made the system more complex. The vehicle system is a multi-domain system, so that computer simulation has become an indispensable tool for vehicle system analysis. We propose a simulation method for the complex vehicle system based on the VHDL-AMS language. A multi-level...
This paper presents a methodology for modeling the high-voltage silicon carbide (SiC) MOSFET/junction-barrier Schottky (JBS) diode power modules. The electrical model of an actual high-voltage SiC MOSFET/JBS module has been obtained using computer-aided electromagnetic analysis and verified through measurements. A circuit simulation model of a 2 kV, 5 A 4-H SiC MOSFET has also been built based on...
A maximum speed of response control of switches-based system described by a second-order difference equation is proposed. A feedback is produced as a linear combination of the differences of system variables. The equation is transformed to the form with nilpotent matrix. The solution of the transformed difference equation converges into a fixed point after two steps. The equation is transformed with...
A modified carrier-based modulation method for three-phase matrix converters is proposed. This method enhances the MC performance comparing to the ldquoconventionalrdquo carrier-based modulation methods in regard to the switching losses and the output voltage harmonic distortion. The output current waveform is also improved in the case of the proposed modulation method with 8 commutations per switching...
This paper investigates the problem of single-phase induction motor (SPIM) sensorless speed control. A discrete time PI controller and a sensorless technique are implemented on a PC-based platform using a standard three-phase inverter drive and vector control. An indirect rotor flux oriented control technique is developed based on a sensorless technique. A MRAS with a Kalman filter algorithm is developed...
This paper deals with the fractional order modelling of the supercapacitor voltage response for a given current profile. The model is obtained using the porous electrode theory applied on the supercapacitor case. In order to simplify the complexity of the model, it is assumed that there is no diffusion process in the electrolyte. These assumption leads to neglect the supercapacitor self-discharge...
Sliding mode control of boost converter is studied. In order to improve dynamical performances with static and dynamic specifications, we propose a systematic procedure to compute the gains of the controller based on an optimization scheme. This method is applied to the control of an energy storage system based on supercapacitors technology in order to regulate the output voltage. Given a system with...
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