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The installation of micro generation systems on-board of electric vehicles is a solution that can contribute to improve the performance of this type of vehicles. Embedded generation systems increase the autonomy of electric vehicles and can reduce the number of times and duration of the recharging process of their energy storage systems. In this work, the influence of installing micro-generation systems...
The aim of this paper is to analyze dynamics of isolated electrical grid during short term interruptions. The effect of short term interruptions of the power supply on the characteristic values of synchronous generator in autonomous operation is analyzed. Dynamical loads (two induction motors), are connecting to the grid. Short-term interruptions that occur in different moments allow analyze of this...
This paper presents a mathematical analysis of a medium scale Photovoltaic (PV) power generation system connected to the distribution network and of its control system, in which the conversion stage is unique thanks to the absence of a boost chopper. Boost choppers are usually used as actuator for maximum power point tracking (MPPT). The conducted analysis leads to the conclusion that the used inverter...
The paper describes a procedure for identification of single machine infinite bus system. Mathematical model of synchronous generator is identified using data obtained from monitoring system. To determine the model parameters of the synchronous generator, a procedure based on Kalman filter was applied. The identified model of the synchronous generator can be used for parameter setting of the voltage...
This paper presents a new control technique for a digitally controlled buck converter. In the proposed method predictive PID control is employed in order to improve transient response and margin of stability. The application of the proposed method is demonstrated for the prototype buck converter. The frequency response is discussed and the transient response is examined to confirm the performance...
Traditional houses consume electrical energy in AC form which is generated by thermal power plants or other energy sources that cause environmental pollution, CO2 emission and global warming. The most important parts of a green house are renewable energy sources like photovoltaic and wind based systems. In this work, our proposed green house generates electrical energy in DC form from photovoltaic...
This paper proposes a new suboptimal reactive control technique for controlling single body heaving wave energy converter (WEC). A self-tunable fuzzy logic controller is implemented to maximize the absorbed energy while respecting the physical limitations of the device. Particle swarm optimization (PSO) algorithm is utilized to carry out an on-line optimization process of the fuzzy membership functions...
Smart house has to avoid interruption of power supply because power supply is more important for electrification house. Therefore, smart house needs uninterruptable power features. The proposed uninterruptable electrification smart house has seamless features for stand-alone mode, phase synchronization operation and grid-connected mode by phase synchronization control. Also, this smart house achieves...
Since the Great East Japan Earthquake, many people have been worried about power shortages in Japan. There has been more focuses to the save electricity at home. A method is very important that can reduce the energy requipment without any trouble to the home peopole. The spread of PV (Photovoltaic) will be expanded by the surplus power buyback institution, and Smart House with HEMS is expected to...
In this paper Gulf of Mexico wind conditions are analyzed to distinguish suitable regions for wind farm development. A turbine merit rating parameter is introduced to evaluate the combined effects of rotor size, turbine rating and economical boundary conditions. An analytical approach is then taken to match local site conditions with a suitable wind turbine rating and rotor size configuration. Hurricane...
In this paper, implementation results of two different topologies for a fuel cell-supercapacitor (SC) hybrid system are presented. In first topology, the SC bank is connected to a low voltage DC-bus while in the second one, it is connected to a high voltage DC-bus through a DC-DC converter. The energy management is carried out in both the topologies with the same control method based on notion of...
This paper presents a novel magnetic circuit model incorporating micromagnetic simulation. The proposed magnetic circuit model consists of two elements; one is a dc hysteresis element given by the micromagnetic simulation, the other is an inductance element which denotes eddy current loss in silicon steels. In addition, the proposed model can be coupled with an external electric circuit model. The...
Regarding modeling of battery system, if the properties of unit cells comprising the system are different, overall battery system model based on a specific cell may cause an error due to the differences in cell properties. In this paper, the statistical method to minimize the error according to the deviation of properties of unit cells comprising the battery module is proposed. The simulation result...
In this paper fuzzy compensator controller is proposed in order to improve dynamic stability of grid connected converter through LC filter. The fuzzy logic technique is used to regulate the parameters of PI controller by injected gain compensator according to deviation of grid voltage. Linear block model of the grid connected converter system is also developed to obtain dynamic response fast and easily...
This paper presents a fuzzy type-2 controller applied on a direct torque control (DTC) of a permanent magnet synchronous motor (PMSM), using DTC technique and space vector modulation (SVM). In the conventional DTC a hysteresis controllers are used to limit the flux and torque in the control band while in the SVM DTC the controllers are replaced by PI FLC controllers. The torque dynamic response is...
This paper presents a new control method for a super-turbo generating (STG) system using an accurate ship-plant system model that ascertains startup characteristics. The STG system is a waste heat recovery type of generation system that makes use of exhaust gas from the main shipboard diesel engines. With STG systems, however, control during startup is not entirely clear. Startup characteristics from...
The connection of wind farms to the electrical power system has increased very fast in the last years requiring the ability of the wind turbines to assist network during voltage sags. Most of the modern wind turbines are based on doubly fed induction generator with a back-to-back power converter connecting the rotor windings to the grid. One limitation of doubly fed induction generator is the operation...
In this study, the LabVIEW modeling of a permanent magnet synchronous generator that will be used in wind turbine and the voltage control with artificial neural networks on the model are done. Typically synchronous, asynchronous and direct current generators are used in wind turbines. In the scope of this study, synchronous generators are preferred due to the advantages such as high efficiency and...
The DC distribution in the multisource systems seems to be a reasonable solution because the supplied energy is in the DC form for several sources, such as the photovoltaic panels (PV), the batteries, and the Ultracapacitors. Additionally, the major parts of the used electronics devises in the buildings operate with the DC current, such as computers, air conditioning, and multimedia. Based on these...
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