voltage regulation Articles
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Simulation and implementation of quasi resonant-negative output converter
This paper presents the analysis, design and voltage regulation of a zero voltage switching quasi resonant-negative output voltage lift Luo converter with low switching losses for aerospace applications. To increase the power packing density, a simple control method using an analogue resonant controller UC3861 is used to regulate the output voltage against load variation and supply disturbance. ...
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Performance analysis of a new configuration of three–phase self–excited induction generator feeding a single–phase load
This paper presents a steady–state performance analysis for a new configuration of self–regulated self–excited three–phase squirrel cage induction generator feeding single phase loads. The proposed scheme provides the required reactive power for excitation, small voltage regulation, acceptable phase balance and large output power. Using an equivalent circuit model incorporated with the method of ...
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MATLAB-based modelling of Distribution STATCOM applied to isolated power system
This paper presents the modelling of Distribution Static Compensator (D-STATCOM) used in isolated power systems. The model of D-STATCOM is developed using Power System Block-set (PSB) and Simulink toolboxes of standard MATLAB software. Two proportional integral PI controllers are used to control DC bus voltage and AC bus voltage regulation at the point of common coupling. Results are presented ...
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Modelling, design and control of a SEPIC power factor corrector for single–phase rectifiers: experimental validation
In this paper, a new general case switching–function–based model is proposed for a DC–to–DC single ended primary inductance converter (SEPIC). Compared to conventional buck or boost converters, this topology allows a low current ripple at the input for a relatively low level of the DC–bus voltage. The converter is used as a power factor correction (PFC) circuit for a single–phase rectifier and, ...
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A STATCOM based voltage regulator for parallel operated isolated asynchronous generators feeding three-phase four-wire loads
This paper presents an investigation on a voltage regulator for parallel operated isolated asynchronous generators (IAGs) supplying three-phase four-wire loads driven by constant speed prime mover like diesel engine, bio-mass, gasoline, etc. The proposed voltage regulator is realised using a static compensator (STATCOM) for providing the reactive power compensation, harmonic elimination and load ...
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STATCOM–based voltage and frequency regulator for stand–alone asynchronous generator
This paper presents a STATCOM–based voltage and frequency regulation for stand–alone asynchronous generator feeding linear and nonlinear loads. The SEIG have inherent poor voltage and frequency regulation. The voltage and frequency depend upon the load current and power factor of the load with fixed excitation capacitor employing unregulated turbines. The changing consumer load requires variable ...
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Multi–objective DG planning for reliability, efficiency, and power quality including voltage rise issue
The reliability of service is very important for sensitive loads. This is only possible when additional generators such as distributed generators are available on strategic load centres to feed these sensitive loads in case of emergency. This paper presents a method to optimally allocate the distributed generations in terms of site and size to satisfy each objectives of multi–objective ...
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Novel STATCOM controllers for voltage stabilisation of wind energy scheme
This paper presents two novel dynamic controllers for the Static Synchronous Compensator (STATCOM) device to stabilise Stand-Alone Wind Energy Conversion Systems (SWECS) using an induction generator. The unified AC system wind energy conversion scheme is connected to a hybrid electric load. The STATCOM device is modelled using the PSCAD/EMTDC software environment. Two novel dynamic controllers ...
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Design, analysis and control of compensators for distribution power systems
This paper deals with the analysis, design and control of Distribution Static Compensator (DSTATCOM) for power quality improvement in an AC distribution system. Various design criteria are considered for the design of DSTATCOM for a variety of possible functions such as voltage regulation, power factor correction and load balancing. Conventional AC power capacitors are considered in conjunction ...
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Three-level 24-pulse STATCOM with optimised magnetics to regulate voltage in transmission system
In this paper, a 24-pulse three-level ±100 MVAR STATCOM (static synchronous compensator) is evolved employing 4 × 6-pulse NPC GTO-VSCs (neutral point diode clamped gate-turn-off thyristor based voltage source converters) with magnetics optimised to a single stage. Through an angle control, the magnitude and phase angle of the STATCOM voltage is controlled with a pre-calculated dead angle in d-q ...
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New topology for management of bi-directional power flow between vehicle and grid with reduced ripple current at unity power factor
In this paper, a new topology of single-phase pulse width modulated (PWM) AC-DC converter is proposed for bidirectional power flow between plug-in hybrid electric vehicle (PHEV) and the grid. This converter consists of a PWM voltage source converter (VSC) and a ripple reduction circuit. The ripple reduction circuit consists of a switching leg and an inductor. The inductor is connected between ...
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Star-hexagon transformer and non-isolated three-leg VSC based three-phase four-wire DSTATCOM
A new three-phase four-wire DSTATCOM (distribution static compensator) is proposed for power quality improvement in the distribution system. The DSTATCOM is based on a star/hexagon transformer and three-leg VSC (voltage source converter). It compensates harmonic current, reactive power and balances the load along with neutral current compensation. Each of the three single phase transformers has ...
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Impacts of dynamic reactive power compensation devices on the performance of wind power generators
This paper investigates the main impacts of dynamic reactive power compensation devices on the performance of induction machine-based wind power generators. The dynamic reactive power compensation devices analysed are the SVC (Static Var Compensator) and the DSTATCOM (Distributed Static Synchronous Compensator). The usage of these devices as a power factor regulator or a voltage regulator is ...
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Modelling of DSTATCOM for distribution system
This paper deals with the simulation of distribution static synchronous compensator (DSTATCOM) for improving power quality of a distribution system feeding linear as well as non-linear loads. Nowadays, there are an increasing number of non-linear loads which inject harmonics into the system. A three-phase insulated gate bipolar transistor- (IGBT-)based current controlled voltage source inverter ...
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Study, modelling and control of a single-phase power factor corrector based on the Sheppard-Taylor topology
In this paper, a single-phase power factor corrector (PFC) based on the Sheppard-Taylor topology is studied. A novel mathematical representation of the converter is elaborated using the state-space averaging technique. In order to emphasise the usefulness of such model, three pulse-width-modulated (PWM) multi-loops control schemes are proposed and developed in the aim of ensuring a unity power ...
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What is an Alternator? How does it Work?
Electricity in your car is as important as it is in your home. All the vehicles have a dedicated device, alternator, which runs all the electronic parts. Find out what exactly an alternator is how does it work to provide electricity to our vehicle. What is an alternator? The alternator is an electric generator that converts mechanical energy into electrical energy, particularly in the ...
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Comparative control analysis of the Vienna rectifier based on its averaged model
This paper presents a comparative evaluation of two multiple-loops duty-cycle-based control schemes applied to a three-phase three-switch three-level boost-type rectifier. The control laws are both elaborated on the basis of a state-space averaged model of the converter, expressed in the synchronous rotating frame. On the one hand, a control scheme that uses linear regulators is designed by using ...
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Advanced Voltage Optimsation Technology
Electric appliances with inductive characteristics, such as refrigerators, air conditioners and compressors are more efficient when the voltage suppliedis regulated and stabilised. This article will explain the physical principles behind voltage reduction on inductive loads, and will include case studies depicting energy savings using powersines comec (a universal energyefficiency controller) in ...
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A combined electro-mechanical control technique for dynamic voltage regulation of a stand-alone wind turbine generator
This paper introduces a computer-based model and dynamic simulation of a combined electro-mechanical control technique for a stand-alone wind turbine generator system. The presented combined control technique consists of three closed loops for speed regulation, nacelle alignment and dynamic load voltage regulation. Speed regulation is achieved by adjusting the pitch angle of the turbine blades. ...
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Power conditioning of an uncontrolled micro-hydroturbine-driven induction generator for distributed generation using a battery energy storage system
Distributed Generation (DG) and its interconnection to the AC power grid is a relatively new concept. DG employs small generators, which are distributed throughout the power system. The electricity is usually generated by renewable energy sources such as wind, hydro and tidal, which are intermittent in nature. These generators connected to the AC grid may lead to severe power quality problems. ...
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