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This paper presents an inrush current reduction method for a 1/2 HP (0.4 kW), 220 V, 4.8 A, 4 poles single phase split-phase type induction generator when connected to a grid using single-phase voltage control with power electronic equipment. A study and analysis of relationship between voltage, current and real power by laboratory tests under direct on line and soft connection conditions are given...
This paper proposes the investigation of skew effect on the behavior and performance of three phase, 2.2 kW, 220/380 V, Δ / Y connected, 1420 rpm, 4 poles grid connected induction generators with skewed squirrel cage rotor for supplying electric power to utility grid. Skewed rotor with angle of 0°, 5° and 10° for grid connected induction generators are employed. Analysis and comparative study on operating...
This paper presents new controller using FPGA and Real-Time Processor based on LabVIEW Programming that can be detected phenomena of Induction Generator (IG) isolated from grid. Advantage of controller can be monitoring voltage, current signal and reducing effect of buildup voltage of IG after disconnecting form grid system by connecting the impedance to IG terminal. The results demonstrate that the...
This paper presents performance evaluation of three-phase induction generator operating as a grid connected single phase induction generator using electronic capacitor for variable speed wind energy applications. When the existing delta connected three-phase can operate as a single-phase induction generator by voltage control techniques using electronic capacitor. The proposed converter system for...
This paper presents performance evaluation of a single — phase grid connected squirrel cage induction generator for variable speed wind energy applications. The existing delta connected three-phase induction generator can operate as a single-phase induction generator by connecting an external suitable capacitor across terminals. For the front end converter, a single-phase full bridge IGBT converter...
This paper presents the investigation of harmonic currents of a power system associated with a static Var compensator for grid-connected induction generators under condition of low wind speed. The static Var compensator uses fixed capacitor and thyristor controlled reactor. The investigation of reactive power compensation for 2.2 kW, 220/380 V, 8.5/5.2A, Δ/Y, 4 P, induction generator has been performed...
This paper introduces an effective technique to reduce semiconductor switching losses in one branch. The switching losses are reduced by using zero crossing technique to control one branch, and the other branch will be controlled by hysteresis current control. The overall switching losses between standard PWM and the proposed will be compared. Performances of the proposed controllers are compared...
This paper presents a power supply for testing a 5 kVA induction motor, which can be applied to testing of induction motors and generators complied with the IEEE Std. 112-2004. The power supply consists of a three-phase AC-DC rectifier, a DC filter and a 6-step inverter with a low pass filer providing nearly sinusoidal output voltages. The blocked rotor test has been conducted at 25 % rated motor...
This paper presents the development of a prototype of polluted gas reducing instrument which used for a gasoline vehicle. Effect of the electric field between electrodes in the instrument to capability in polluted gas reduction has been studied. In experiments, the electric field of 0–25 kV/cm 20kHz was varied. The revolution speed of engine was set to be 700 rpm. Electrode is wire-plan with 2 layer...
This article presents development of a new helix coil electrode of an ozone generator for disinfection in hospital. In development of the proposed electrode, the optimal spacing between each turn of the helix coil has been investigated. The considered spaces are 1 cm, 2 cm, and 3 cm. To confirm the performance of the proposed electrode, the capability in ozone generation has been considered in an...
This paper presents the application of multiple linear regression (MLR) to estimate the electrical energy consumption in case of the irregularity in the automatic meter reading (AMR) system. This event occurs in a delivery metering system such as problems from setting and connecting meter with the wrong electrical system, broken metering accessories, etc. The estimation is performed by using MATLAB...
This paper presents active power control or real power of single-phase grid-connected system supplying nonlinear load. The control method employs the reference current calculation combining the required real component of the grid current derived from required active power transfer to the grid and required harmonic current for harmonic elimination associated with the nonlinear load. With this method,...
This paper proposes characteristic requirements of a small scale squirrel cage induction generator for effective electricity generation from wind energy. These characteristics are obtained from modeling and testing results. Investigation into comparative performances between Standard and high efficiency induction generators is given in order to find out the characteristic requirements of a suitable...
This paper presents a single-phase grid connected system with reactive power compensation functionality for an axial flux permanent magnet (AFPM) generator. The proposed system offers bi-function namely not only transfers energy generated by any kind of mechanical power sources via an AFPM but also feeds reactive power to compensate the reactive power drawn by loads. The proposed system includes 3...
This paper presents a single-phase grid connected photovoltaic (PV) system with active power filter functionality for nonlinear load. The system is simulated by using MATLAB/SIMULINK. With this method, power generated by the PV is transferred to the nonlinear load and the grid and the power factor is nearly unity. The current control is based on adaptive PWM method The system performance is investigated...
This paper presents a single-phase grid connected inverter for an axial flux permanent magnet generator. The power is transferred by using a microprocessor based IGBT inverter to a 220V, 50Hz single-phase supply via a transformer. The five phase axial flux permanent magnet generator provides dc voltage through five bridge diode rectifier sets. The converter circuit operation is described. The performance...
This paper proposes the design, analysis, and construction of a three phase, 0.75 kW, 220/380 V, 3.4/2.0 A, Δ/Y connected, 4 poles, SEIG (self-excited induction generator) based on empirical rules. The designed SEIG offers improved high efficiency and power quality. The design takes into consideration a skew effect and power quality. A 2D-FEA (2 dimension finite element analysis) is used to consider...
This paper proposes the high-voltage high-frequency power supply for an ozone generator using a phase-shift pulse width modulation (PWM) full bridge inverter with constant applied electrode voltage. The circuit operation is fully described. The high-frequency transformer and ozone generator mathematical models are also included for preliminarily calculating of instantaneous voltages and currents....
This paper presents a performance comparison of an asymmetrical parameter type two-phase induction motor supplied with balanced and unbalanced phase voltages using a three-leg voltage source inverter (VSI). Sinusoidal pulse width modulation (SPWM) method with constant V/F control is used for the two phase three leg inverter. Simulation and experimental results are used to evaluate the motor performance...
This paper presents a simple speed control method of an asymmetrical parameter type two-phase induction motor drive using a three-leg voltage source inverter (VSI). The two-phase induction motor is adapted from an existing single-phase induction motor resulting in impedance unbalance between main and auxiliary windings. Thus in order to improve the performance it needs an unbalanced phase supply....
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