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This paper presents a complete analysis, design and implementation of an enhanced space vector pulse width modulation (SVPWM) control for six-phase to three-phase grid connected matrix converter. The matrix converter (MC) is designed based on 18 bidirectional switches in order to interface a high performance fault tolerant multiphase permanent magnet synchronous generator (PMSG) to the main utility...
The photovoltaic (PV) source simulators are widely used to test solar inverters, evaluate their control algorithms and study their grid integration issues in the laboratory settings. Many commercial programmable dc power supplies can be re-programed to be PV simulators. Due to the bulky output dc capacitors, the dynamic response and the bandwidth of these PV simulators are significantly limited, which,...
In order to make better use of the existing transmission system, different approaches can be adopted. Previous research shows that both topology control and flexible AC transmission systems (FACTS) can enhance the transfer capability over the existing transmission network and reduce congestion costs. In previous studies, potential cost savings from performing line switching and utilizing FACTS control...
In this paper the switched reluctance generator (SRG) is explored considering the improvement of its efficiency. This machine generates a DC power that is directly related to input driving parameters. Simulation results are presented bringing a case study of parametric regression to track the best efficiency for any input parameters: excitation voltage and turn off angle. A method known as parametric...
Transmission line switching is an important operational action in power transmission systems, and has been successfully applied to reduce generation costs and eliminate congestions. Prior work mainly focus on tackling the Optimal Transmission Switching problem based on steady states. This paper studies how to generalize these results when transmission switching is performed on highly congested systems...
Power quality is an important issue for wave energy developers, as the wave energy converters output power profile presents a lot of fluctuations due to the oscillatory nature of the waves. In order to emulate an operating direct drive wave energy converter, study power quality improvement and test different control strategies, a wave-to-wire model has been developed. Although control study for wave...
Reliability models of doubled systems with hot and cold redundancy are suggested. The switching device can makes type I and II errors in these systems. Dynamic fault trees and Markov models are used for reliability characteristics determination.
This paper introduces a new transformerless converter topology for Multiphase-Based Wind Energy Conversion Systems (WECSs). In this topology, a twelve-phase induction generator is integrated to the grid using dual Nine-Switch Converters (NSCs) connected in series forming a high voltage cascaded dc-link. For this generator phase number, this topology reduces the total number of semiconductor devices...
The problem of fault diagnosis in hybrid systems is investigated. The hybrid systems under consideration consist of finite automaton, the set of linear difference equations and so-called mode activator that coordinates the action of the other two parts. The hybrid residual generator based on nonparametric method is found that solves the fault diagnosis problem under certain (sufficient) solvability...
This work shows a new control method for an isolated photovoltaic system using a finite control set model predictive control (FCS-MPC). The designed control system gives us a good tracking of the optimum current reference, current at which the maximum power is reached. The photovoltaic system is connected to a variable resistive load through a DC/DC boost converter. The FCS-MPC controller gives the...
The work describes the modeling and simulation of a renewable energy based hybrid power system in the aspects of improving power quality and system reliability. An Energy Management and Control Unit (EMCU) is also proposed. For meeting the sustained load demands during varying natural conditions, different renewable energy sources and converters need to be integrated with each other. The paper focuses...
In this paper a new single-phase multilevel inverter topology is presented. Proposed topology is capable of producing nine-level output voltage with reduce device counts. It can be done by arranging available switches and dc sources in a fashion such that the maximum combination of addition and subtraction of the input dc sources can be achieved. Comparison between the existing topologies shows that...
By aggregating renewable sources as main generators, storage systems, diesel generator, and loads, microgrids can achieve high level renewable energy penetration and efficiency in electricity distribution systems. The difference between loads consumption and renewable generation causes fluctuations in the microgrid bus voltage. For off-grid operating mode or limited public grid availability, power...
This paper presents an air conditioning inrush current startup simulation apparatus to evaluate the performance of a nanogrid under the use of a wide range of air conditioning (A/C) units. The correlations of factors of the A/C units, including line voltage drop, startup current and startup time increase, are derived and provided as input parameters for the apparatus. The evaluation of the nanogrid...
The generalized mathematical model of the switched-induction machine is developed. Placement of the magnetic flux in space of the electrical machine in the ANSYS Workbench program is calculated. Flux linkages dependencies on the current value and the relative angle of rotor rotation as MATLAB-functions are generalized. The simulation model of the starter-generator device is designed in the MATLAB/Simulink...
The SMaRTS model, Scheduling Maintenance for Reliable Transmission Systems, is developed to schedule transmission line maintenance requests optimally and centrally at the central dispatcher (CD) level. The SMaRTS model promises up to 4% production cost savings by solely shifting the maintenance to an optimal time frame for the system. The model is developed to co-optimize generation unit commitment...
This paper presents a contribution to the field of photovoltaic conversion system. An equivalent electrical circuit model of a PV module is presented with the appropriate algorithm of determination of internal parameters. An adaptation stage consisting of buck DC-DC converter is implemented between PV generators and the pure resistive load (lamp). The DC-DC converter is controlled by the development...
This study proposes a sliding-mode direct power control (SMDPC) strategy for a grid-connected bidirectional power converters feeding a doubly-fed induction generator (DFIG) with slip power recovery. The control design, based on the second-order sliding modes (SOSM) is adopted to control both converters rotor side converter (RSC) and the grid side converter (GSC). Simulations performed under Matlab/Simulink...
This paper presents the application of an adaptive neuro-fuzzy controller (ANFC) for speed control of the switched reluctance generator (SRG). In this study, the SRG is driven by a variable-speed wind turbine and connected to the grid through an asymmetric half bridge inverter, DC-link, and DC-AC inverter system. Speed control plays an important role in variable-speed operation of the SRG to ensure...
This paper presents the study of dynamic modeling and control of a converter of multiple inputs (MIC) with MPPT. There are two independent inputs, wind and photovoltaic sources (PV), connected to a DC bus, and a single converter (MIC) as a means of reducing system costs. In order to extract maximum energy from the PV system for a given solar irradiance and temperature, an approach of adjusting the...
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