Voltage Regulating Articles & Analysis: Older

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. ...

By Inderscience Publishers

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 ...

By Inderscience Publishers

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 ...

By Inderscience Publishers

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 ...

By Inderscience Publishers

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 ...

By Inderscience Publishers

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 ...

By Inderscience Publishers

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 ...

By Inderscience Publishers

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 ...

By Inderscience Publishers

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 ...

By Suzhou Unitech Automotive Electrical Appliance Co., Ltd. (Unitech)

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. ...

By Inderscience Publishers

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 ...

By Inderscience Publishers

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 ...

By Inderscience Publishers

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 ...

By Inderscience Publishers

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. ...

By Inderscience Publishers

To ensure the generator’s stable operation, it is important that there are no major voltage fluctuations. For this purpose, an excitation current is created to provide power to the AVR (Automatic Voltage Regulator), a device that maintains the generator's nominal voltage at a preset value, even when there are sudden load variations or in the case of special operations, such as: parallel ...

By Grupel SA

Abstract The paper describes main reasons for refurbishment of hydro power plants and summarizes the most frequent works during refurbishment. A special attention is paid to the process of refurbishment of the electric equipment, in the first line generators and excitation systems, and integration of the most contemporary monitoring system. The paper talks about some of the methods of estimation ...

By KONČAR - Electrical Engineering Institute Ltd.

Salient issues associated with the connection of hydropower distributed generation (HPDG) into distribution networks include operation and voltage regulation, grid connection and control interaction, anti-islanding protection and islanding operation, and operation of protective devices. Better understanding of these issues and finding solutions to these problems are timely and important to the ...

By Inderscience Publishers

This paper presents a three-phase shunt active power line conditioner (APLC) for harmonics and reactive power compensation to enhance the power quality. The compensation process is based on sinusoidal extraction control method, which consists of positive-sequence voltage detector to regulate the distorted supply voltage and instantaneous real-power for fundamental component extraction from the ...

By Inderscience Publishers

This paper presents a single–stage isolated power factor corrected power supply (SSIPP) fed permanent magnet brushless DC (BLDC) motor drive. An advantage of fast voltage regulation with single voltage control loop of SSIPP is utilised to develop a power factor correction (PFC) based BLDC motor drive. The speed of BLDC motor is controlled by varying the DC link voltage of the voltage source ...

By Inderscience Publishers

When it comes to energy conservation, Veridian Connections (Veridian) practice what they preach. As one of Ontario's largest electric utilities, Veridian actively promotes a culture of conservation both within their internal business operations and to their 115,000-plus customers. Following the completion of a 26,000 square foot LEED certified expansion to their corporate headquarters in Ajax, ...

By Legend Power Systems Inc.