The paper describes a small autonomous wind energy conversion system that has been designed and implemented as prototype unit for the demonstration of wind-electricity generation. A simple, closed-loop control assures maximum-power transfer by aid lookup table which relates electrical power output to shaft speed. is deduced from turbine generator data corrected field tests. directly-coupled, wound-rotating synchronous used conversion. speed in this variable while terminal voltage...

In low-power applications of photovoltaic (PV) systems, the transformerless grid-connected inverters have been preferred to increase efficiency and reduce cost, size, power losses when they are compared ones with transformer. A single-phase inverter topology a single dc-link capacitor for PV systems is proposed in this paper. The has simulated by using cooperation process MATLAB SPICE package programs it implemented experimental verification. reduces high-frequency common-mode leakage...

This program can be used to examine the transient performance of slip energy recovery drives for proper rating semiconductor devices or effects faults on associated power system drive performance. Current and speed controllers designed using linear techniques evaluated this as well. A computer a fourth-order Runga-Kutta integration routine has been developed that uses newly proposed model predict detailed operation both in steady state. The hybrid is between well-known d, q phase variable...

This paper presents state space model of singlephase STATCOM based on continues switching function. Continues functions for bipolar voltage source inverter (VSI) have been used to derive the transfer function complete controller. Two proportional integral (PI) controllers which are a DC PI link control and an AC alternating current implemented in cascade topology reactive power compensation. Proposed method has analyzed simulation by using MATLAB. Root locus technique is design controller parameters.

Slip energy recovery induction motor drives are used in high power applications, which by controlling the slip a variable speed drive system is provided. However, poor factor disadvantage of system. Presence sub-harmonics line frequency on stator side one special features these drives. A phase-controlled inverter can absorb reactive from supply and inject low-order current harmonics with relatively amplitudes to supply. This paper simulates harmonic content waveforms various points at...

In this paper, a three-phase, Y-connected, five-level static synchronous compensator with reduced number of switches is proposed for single phase and unbalanced three-phase loads. The level shifted carrier based sinusoidal pulse width modulation method used switching. active reactive powers demanded by the load are estimated each independently to compensate power supplied from system. simulation results obtained Matlab compared experimental work dedicated model system implemented in...

Details are provided, in the form of a flowchart, to permit reconstruction computer program predict transient and steady-state performance slip energy recovery induction motor (IM) drives. Slip IM drives different from most other that inverter is generally connected only after machine has reached predetermined speed. The initial conditions therefore nonzero difficult obtain. Three techniques can be used calculate discussed. Theoretical predictions supported by practical results.< <ETX...

In this paper, a shunt active filter based on adaptive linear neuron (ADALINE) method is analyzed. The ADALINE that used here as the harmonic extraction implemented with measurement of load current under direct and indirect techniques. response to loading conditions compared instantaneous reactive power theory (IRPT) method. TMS320F2812 digital signal processor (DSP) employed central processing unit in experimental works. Copyright © 2010 John Wiley & Sons, Ltd.

In this paper single-phase instantaneous reactive power (p-q) method and non-active current have been compared. Reactive calculation using these methods considered here under distorted voltage waveforms. It has shown that two some limitations for compensation. The p-q with hysteresis controller theory sinusoidal pulse width modulation (SPWM) analyzed in Matlab/Simulink. A prototype system designed TMS320F2812 EzDSP the laboratory assessment based on simulation experimental results is given paper.

A LCD (liquid crystal display) has the CCFL (cold cathode fluorescent lamp) for backlight illumination. The is fed at high voltage and frequency by an inverter in TVs. unit consumes almost %40 of input power. with step-up transformer this commonly supplied from switch mode power supply. In work, a parallel resonance without used to eliminate loss. circuit analyzed PSPICE package program results are compared implementation.

In this paper, discrete wavelet transform (DWT) and symmetrical component (SC) analysis are used together for extracting the fundamental oscillations in supply current drawn by slip energy recovery drive (SERD). Discrete Meyer is as mother due to its orthogonal biorthogonal properties generate reference signal active power filter (APF) order compensate harmonics. Simulations performed wing Matlab Simulink Wavelet Toolbox. Simulation results show that DWT algorithm can abstract of currents...

The purpose of this paper is to estimate the efficiency inverter circuits used for Photovoltaic (PV) systems. analysis a power electronics converter with SPICE during steady-state operation takes long time and results may not be obtained accurately due convergence problem in solver. MATLAB package program widely preferred analyze converters if switching losses are taken into account main study. Here, In order perform detailed program, gate signals IGBTs have been generated as text file...

A fourth order nonlinear model is derived from a previously developed (Krause et al., 1988) for an open-loop slip energy recovery induction motor drive. The transient of the drive linearized around steady-state operating point using small signal perturbation technique and transfer functions which relate input output variables are derived. block diagram closed-loop control system obtained. responses proportional plus integral (PI) controller employed to rotor speed PI used DC link current...

In this paper, PSPICE analysis and design of grid connected multilevel converter will be presented. This has all the features H-bridge structure, while it six semiconductor switches drivers to produce five-level output voltage. Reduction IGBTs decreases losses system cost. The is used predict spikes on collector emitter voltages snubber circuit. implemented in three-phase V-connected Statcom by using a digital control algorithm realized floating point DSP TMS28335. (6 pages)

In this paper, a 3-phase, V-connected, 5-level Static Synchronous Compensator (STATCOM) is proposed with reduced number of switches for single phase and unbalanced three-phase loads. The system implemented tested under different loading conditions. level shifted carrier based SPWM method, instantaneous active (P) reactive (Q) powers are used to control the system. simulation results obtained from Matlab compared experimental operated DSP TMS320F28335. (6 pages)

The authors examine the starting transients of slip-energy recovery induction motor (IM) drives when started directly with rotor rectifier. slip energy IM comprising three stages are presented: from zero speed a resistor connected to output rectifier; transmission period in which inverter is through DC link; and final disconnected rectifier output. A hybrid model used retains actual phase variables but transforms those stator only, drive system.< <ETX...

In this paper, multi-level cascaded Static Synchronous Compensator (STATCOM) is proposed using a novel converter having reduced number of switches. STATCOM analyzed by DSP and Matlab, interactively. The level shifted carrier based SPWM method, instantaneous single phase active (P) reactive (Q) power algorithms are applied to control converters. performance investigated for unbalanced load conditions. simulation results Matlab alone interactively operated with TMS320F28335 presented.

This paper presents the simulation results of shunt active power filter (SAPF) implemented for compensation current harmonics and voltage regulation at terminals an isolated synchronous generator (SG) with a diode rectifier load. The effects non-linear load on SG operation harmonic performance SAPF are analyzed models developed in PSCAD package program. applicability reducing terminal distortion is verified by results. design analysis switching ripple (SRF) system considered given. fast...

This paper presents the realization of communication process between digital signal processing unit and MATLAB/Simulink during simulation power converter with its controller. The application hardware in loop is great importance for designer to estimate effect on controller response system stability. DC boost operated as maximum point tracker predicted current used perturb observe algorithm photovoltaic system. circuit kept Simulink whereas entire programmed unit.

A closed-form expression for estimating the overlap angle in a slip energy recovery system is presented. The prediction of important case doubly-fed induction motor drives, because its influence on speed and torque. derived using hybrid model dynamic rotor rectifier. ripple content DC link current inverter input voltage are neglected. results predicted by verified experimentally.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>