STATCOM-Based Voltage Regulator for Self-Excited Induction Generator Feeding Nonlinear Loads

Singh, Bhim; Murthy, S. Srinivasa; Gupta, Sanchit

doi:10.1109/tie.2006.882008

Cited by 182 publications

(66 citation statements)

References 15 publications

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“…The STATCOM, as a popular DRPC, is capable of generating inductive or capacitive reactive power. Even though it has a low current distortion rate and a good dynamic response characteristic, it suffers from high frequency switching and a complicated space vector pulse width modulation (SVPWM) control [4]- [6]. Thyristor controlled series capacitors (TCSC) [7], static synchronous series compensator (SSSC) [8] and unified power flow controller (UPFC) [9] have also succeeded in continuous reactive power regulation or power factor correction (PFC).…”

Section: Introductionmentioning

confidence: 99%

A Magnetic Energy Recovery Switch Based Terminal Voltage Regulator for the Three-Phase Self-Excited Induction Generators in Renewable Energy Systems

Wei¹,

Kang²,

Huang³

et al. 2015

Journal of Power Electronics

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Distributed generation systems (DGSs) have been getting more and more attention in terms of renewable energy use and new generation technologies in the past decades. The self-excited induction generator (SEIG) occupies an important role in the area of energy conversion due to its low cost, robustness and simple control. Unlike synchronous generators, the SEIG has to absorb capacitive reactive power from the outer device aiming to stabilize the terminal voltage at load changes. This paper presents a novel static VAR compensator (SVC) called a magnetic energy recovery switch (MERS) to serve as a voltage controller in SEIG powered DGSs. In addition, many small scale SEIGs, instead of a single large one, are applied and devoted to promote the generation efficiency. To begin with, an expandable mathematic model based on a d-q equivalent circuit is created for parallel SEIGs. The control method of the MERS is further improved with the objective of broadening its operating range and restraining current harmonics by parameter optimization. A hybrid control strategy is developed by taking both of the stand-alone and grid-connected modes into consideration. Then simulation and experiments are carried out in the case of single and double SEIG(s) generation. Finally, the measurement results verify that the proposed DGS with SVC-MERS achieves a better stability and higher feasibility. The major advantages of the mentioned variable reactive power supplier, when compared to the STATCOM, include the adoption of a small DC capacitor, line frequency switching, simple control and less loss.

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Section: Introductionmentioning

confidence: 99%

A Magnetic Energy Recovery Switch Based Terminal Voltage Regulator for the Three-Phase Self-Excited Induction Generators in Renewable Energy Systems

Wei¹,

Kang²,

Huang³

et al. 2015

Journal of Power Electronics

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show abstract

“…K pd and K id are the proportional and integral gain constants of the dc-bus voltage PI controller, respectively. The source should supply the power loss component of the current (I loss ) along with the filtered equivalent D-axis current component of the single-phase load estimated in (14). In order to ensure balanced and sinusoidal source currents, the D-axis component of source currents after compensation must be equal for all the phases and it should not contain any ripple.…”

Section: B Reference Source Currents Estimation Using Singlephase Symentioning

confidence: 99%

Design and Implementation of STATCOM Controller for a Three Phase SEIG Feeding Single Phase Loads

Gopinadh¹

2015

International Journal of Innovative Research in Electrical, Ele

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Abstract:The main aim of the project is to compensate the unbalanced currents caused by single-phase loads that are connected across any two terminals of the three-phase SEIG by using STATCOM with D-Q theory technique. This project presents single-phase power generation using a three-phase self-excited induction generator (SEIG) working in conjunction with a three-phase static synchronous compensator (STATCOM). Due to the specific advantages of the squirrel-cage induction machine over the conventional synchronous machine, SEIGs are being employed in remote and isolated power generating systems as mechanical energy conversion devices. When an SEIG is driven by prime movers such as biomass, biogas, and biodiesel engines, the frequency of the generated voltage is almost constant from no load to full load. But, poor voltage regulation has been the major drawback of an SEIG in its applications. To control the terminal voltage by using one of the controlling equipment like active switches which use the combination of a fixed capacitor and thyristor-controlled inductor known as static var compensator (SVC), the disadvantage of SVC is it would generate low-order harmonic currents caused by the switching of line currents and they also involve large size and heavy weight of passive elements. The performance of the SEIG-STATCOM system is evaluated for both linear and nonlinear single-phase loads. Furthermore, the performance of the SEIG at different terminal voltages is observed and the terminal voltage corresponding to the maximum power output is identified and also observes the source current and load current by using SIMULINK/MATLAB software. In this project, an alternative method of feeding singlephase loads using a three-phase SEIG without de-rating the machine is proposed. The benefit of integrating a STATCOM in an SEIG based Standalone power generation feeding single-phase loads is threefold first, generator currents balancing; second, voltage regulation; and third, mitigates the harmonics injected by nonlinear loads.

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“…However, major disadvantage of SEIG is its inability to maintain voltage and frequency at constant levels [2]. Much research has been done to develop methods to control voltage and frequency in constant power and variable speed and power applications [3][4][5][6][7]. In a hydropower station which is a constant power source, an electronic load controller is connected across the SEIG for its voltage and frequency regulation.…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Fuzzy Logic and PI Controller Based Electronic Load Controller for Self-Excited Induction Generator

Mishra¹,

Tiwari²

2017

Advances in Electrical Engineering

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Rural areas suffer from limited grid connectivity. Small hydroplants can provide electricity at a cheap cost with low environmental impact in these regions. Self-excited induction generators are widely used in hydroplants since they operate on a standalone basis because of the connection of capacitor bank that provides reactive power at no load. However, SEIGs suffer from poor voltage and frequency regulation. Thus, an electronic load controller (ELC) is connected across SEIG to regulate voltage and frequency. Generally, the control scheme for an ELC circuit is based on the conventional proportional integral control, which is easy to implement and performs well under linear load conditions. However, PI controllers handle nonlinearity poorly. This paper presents a fuzzy logic control (FLC) based control scheme for ELC in a constant power generation system (SEIG). The control scheme is designed and simulated in MATLAB under both linear and nonlinear load conditions. A comparison of both the controllers is conducted which highlights the superiority of the fuzzy logic control scheme.

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STATCOM-Based Voltage Regulator for Self-Excited Induction Generator Feeding Nonlinear Loads

Cited by 182 publications

References 15 publications

A Magnetic Energy Recovery Switch Based Terminal Voltage Regulator for the Three-Phase Self-Excited Induction Generators in Renewable Energy Systems

A Magnetic Energy Recovery Switch Based Terminal Voltage Regulator for the Three-Phase Self-Excited Induction Generators in Renewable Energy Systems

Design and Implementation of STATCOM Controller for a Three Phase SEIG Feeding Single Phase Loads

Comparative Analysis of Fuzzy Logic and PI Controller Based Electronic Load Controller for Self-Excited Induction Generator

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