This paper presents a STATCOM with self-oscillating bidirectional dc-dc converter for interfacing battery energy storage in stand-alone induction generator system. The self-oscillation mode is based on relay feedback control hysteresis. To reduce the output current ripple, an LCL filter connected between half bridge of this and other side coupled voltage-source converter. proposed allows that previous electronic converters, additional resistive dump load, compensate all disturbances...

This study presents a wind energy conversion system based on dual stator‐winding induction generator. The generator can work at variable speed and also be connected to the grid. proposed three operation zones that depend are delimited by power ratio assigned each of two stator windings. design starts from three‐phase squirrel‐cage machine allows simple assembling new windings, what results in an economical, robust reliable machine. These features make appropriate for systems located remote...

This paper combines three different methods for the analysis of a self-oscillating bidirectional dc-dc converter under hysteresis control. First, describing function method is used to predict steady-state limit cycle, along with its oscillation amplitude and frequency. Second, Tsypkin applied provide more precise information on dynamical behavior system. To complete study, sliding-mode approach insight into system response in terms parameters. A comparative study among results obtained from...

Ferroresonance is one of the most destructive transient phenomena in power systems. This complex phenomenon involves association nonlinear magnetizing inductances and capacitances, may be initiated many different ways, which makes its characterization very difficult. work links EMTP MATLAB presents some computer tools that have been developed for assessing ferroresonance behavior. These allow users to visualize 2-D 3-D bifurcation diagrams can used performing sensitivity analysis, predicting...

This paper proposes a system, based on self- excited induction generator with shunt electronic converter, to feed isolated three-phase and single-phase linear or nonlinear loads. The converter is composed by four-wire voltage source inverter (VSI) and, connected its dc side, two dc/dc converters. VSI compensates the current harmonics, reactive power load unbalances. first of converters battery charger/discharger other dissipates active excess, through chopper, so these keep balance complete...

Load and supply parameters may be uncertain in microgrids (MGs) due for instance to the intermittent nature of renewable energy sources among others. Guaranteeing reliable stable MGs despite parameter uncertainties is crucial their correct operation. Their stability dynamical features are directly related controllers’ power-sharing coefficients. Hence, maintain power good quality within desirable range system have a satisfactory response sudden load changes, careful selection controllers...

This work proposes a system, based on self-excited induction generator (SEIG) with shunt electronic converter, to feed isolated three-phase and single-phase linear or nonlinear loads. The converter is composed by four-wire active filter DC chopper attached its bus. compensates the current harmonics, reactive power load unbalances at AC side dissipates excess through side. designed control architecture assures that, in steady state, rms values of voltages frequency remain their reference...

In this work, we present an electronic system that simplify the incorporation of additional sources to a previously existent small PV system. Particularly, investigate how proceed with low voltage, high-current PEM fuel-cell. The proposed is developed from concept loss-free resistor, and can be easily adapted any type energy source storage elements. Among advantages system, array keeps its maximum power point (MPP), independence delivered by new source. addition, allows also particular MPPT...

An algorithm implementing a behavioural modelling technique for estimating the parameters of induction machine models is proposed. This technique, called torque–speed tracking, starts from manufacturer data and solves identified problems which are caused by lack operating points method used to minimise torque error. The proposed implemented both single- double-cage models, obtained behaviour compared with that one other techniques model parameters. validated catalogue 64 machines,...

This paper proposes and implements a modified topology of dual stator winding induction generator with standard squirrel cage rotor. The design includes two-dimensional finite elements analysis to investigate the magnetic field distribution. A DWIG prototype is developed tested verify validity this machine as variable speed wind generator. proposed does not involve significant increase in cost generator, or change stator-winding machine.

Although several built-in models are currently available in transient tools for transformer representation, users of these can develop their own custom-made models. A very common approach when developing new is to apply the principle duality. It has been proved that a topologically-correct model single-phase applying duality so-called π model. This work aimed at validating model, including hysteresis modeling transformers ferroresonance studies by comparing simulation results and laboratory...

Abstract The use of Active Power Filters (APFs) in future power grids with high penetration nonlinear loads is unavoidable. Voltage Source Inverters (VSIs) interfacing Photovoltaic (PV) generator could play the APF role addition to supply. In this paper, control a PV-fed multifunctional grid-connected three-phase VSI addressed and unbalanced load. objective threefold. first one deliver maximum available from PV source grid satisfying quality standards. second Balancing Control for DC-link...

EVs will play an important role in transport, climate change and electrification. However, there is a consensus that one of the main obstacles to full market penetration so-called range anxiety (fear not having enough charge vehicle). Electric vehicle charging infrastructures have two opposing approaches their use. For urban routes, where distances travelled, EV usage times are low, on-board alternative current (AC) chargers (Level 1 2) can meet requirements most situations. The solution...

The dual-stator winding induction generator (DWIG) is a promising electrical machine for wind energy conversion systems, especially in the low/mid power range. Based on previous successful results utilising feed forward control, this article, super-twisting (ST) sliding mode improved control set-up developed to maximise extraction during low regimes. To accomplish objective, via constant volts/hertz implementation, ST controller was designed command DWIG winding, such that tip-speed ratio...

This paper uses an easy technique to calculate directly the parameters for induction motors, using single- and double-cage models. has been applied in a wide sample of 2167 where have calculated from manufacturer data. The results show that this provides large errors start maximum torque points, but on other hand, it small error full-load point, both For reason, when motor works near example there are some disturbances electric supply, could be with good results.

An analysis and design of an asymmetrical full-bridge multilevel converter in sliding-mode operation for inverter applications small power systems are presented. A five-level sinusoidal current source is proposed with the lowest number controllable devices simplest control electronics. The nature achieved by means a loop forcing output to track reference. theoretical predictions have been verified experiments 1 kW prototype both stand-alone grid connection operations.

Purpose – The purpose of this paper is to develop and test a prototype the dual stator‐winding induction generator (DWIG) its dynamic model verify validity machine design as variable speed for renewable energy systems.

This work analyzes the performance of a dual stator-winding induction generator based wind turbine during grid faults. The simulated and experimental results can be used to improve transient response these faults, as well being reference frame low-voltage ride-through capability enhancement for this type generator.

This research intends to prove by experimental work how ferroresonance can occur between generating systems based on a self-excited induction generator and power transformers. Up four different paths have been tested under commutation maneuvers. Ferroresonance appearance unfold into dangerous state for machinery personnel. Several over-voltages be present in the system simple delay one of poles responsible grid connection/disconnection.

Nowadays the term ferroresonance is firmly established in power system engineer's vocabulary as one of most destructive transient phenomena, which may cause failures equipment such transformers, cables, or arresters. Its complex non-linear behavior makes difficult its characterization. This work links EMTP and MATLAB to presents some techniques for assessment behavior. The aim visualize 2D bifurcation diagrams can be used performing a deep sensitive analysis, 3D predict phenomenon assist...

The topology and management of a sustainable dual-bus, AC DC, microgrid designed to operate connected weak grid is presented. AC+DC hybrid microgrids are robust cost-competitive solution for poorly areas, as can be found in rural or island electrification. versatile proposed this work developed around wind turbine based on particular induction generator with double stator winding squirrel cage rotor (DWIG). This singular especially suitable combined coupled application. One its windings the...

A sea-wave energy harvesting, articulated device is presented in this work. This hand-made, wooden made combining the coil windings of an array three single transducers. Taking advantage sea waves sway, a linear oscillating motion produced each transducer generating electric pulse. Magnetic fundamentals are used to deduce electrical model transducer, solenoid-magnet device, and after whole harvesting array. The obtained stored battery supply stand-alone system pay-load, for instance telecom...