New Static VAR Control Using Forced-Commutated Inverters

Sumi,; Harumoto,; Hasegawa, M.; Yano,; Ikeda, Kazuhiro; Matsuura,

doi:10.1109/mper.1981.5511833

Cited by 5 publications

(5 citation statements)

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“…xcos not] (1) where n is the harmonic order (n = odd number); 8 is the pulse control angle; Ed is the dc voltage; and q ( t ) is the output voltage. where I, is the n-th order harmonic component of SVG output current; V, is the transmission system voltage; and X is the reactance between transmission system and SVG.…”

Section: Basic Characteristicsmentioning

confidence: 99%

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Development of a large‐capacity static var generator using self‐cornmutated inverters for improving power transmission system stability

Hasegawa

Betsui

Ohnishi

et al. 1993

Electrical Engineering Japan

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A Static Var Generator (SVG) based on a self‐commutated inverter using GTO thyristors has been newly developed. The size of the SVG used for improving power system stability will be as large as approximately 100 MVA. The technical subjects to be solved for developing such a large SVG are summarized as follows: compact design; harmonic elimination by means of multiple transformers; and large inverter with series connection of GTO thyristors. This paper describes the solutions to these subjects, especially the application of a large number of multipulse connection and series connection of GTO thyristors, including the analysis of the basic performance of SVG and the multiple transformer. The test results of a 12‐pulse partial model (8 MVA) and a 48‐pulse miniaturized model prove the solutions proposed in this paper to be effective and reasonable.

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Section: Basic Characteristicsmentioning

confidence: 99%

“…Since the output voltage of the inverter is given by Eq. (1). the induced voltage vdr) on the primary side of the unit transformer with a phase angle a is given, using…”

Section: Basic Characteristicsmentioning

confidence: 99%

Development of a large‐capacity static var generator using self‐cornmutated inverters for improving power transmission system stability

Hasegawa

Betsui

Ohnishi

et al. 1993

Electrical Engineering Japan

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“…In 1981, an advanced static Var compensator in prototype form was introduced by [1]. The compensator was built using force-commutated inverters.…”

Section: Introductionmentioning

confidence: 99%

Design of a continuously and linearly controlled VSI-based STATCOM for load current balancing purposes

Abdulmunem

Obais

2021

IJPEDS

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In this paper, load current balancing are reviewed in both three-wire and 4-wire systems taking into account linearity, harmonics injection, and control schemes. A linearized static compensator (STATCOM) based on H-bridge voltage source inverter (VSI). The proposed STATCOM is controlled in closed loop mode via equipping it with a new current controller. The DC capacitor voltage of the STATCOM is kept constant without using external energy injection or storage devices via shunting the DC capacitor with a suitable series filter. The simulation results of the current responses of the 220V, 50Hz STATCOM reveal continuous and linear performance during responding to reactive current demands from 123A inductive current to 227A capacitive current. The transition time required for the proposed STATCOM during treatment of a sudden change in reactive current demand from maximum inductive current to maximum capacitive current is less than 40ms. The steady state portions of the STATCOM current responses show pure sinusoids, thus the proposed STATCOM can be promoted as harmonic free static Var compensator. The closed loop continuous mode control and the considerable linearity of the proposed STATCOM promot it as a bipolar susceptance (capacitive and inductive) in applications of load current balancing systems in both three and four wire power systems.

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“…A statcom is an application based on the power conversion principles. It is either a voltage source inverter shunted by a DC capacitor [23] or a current source inverter shunted by a DC reactor [24]. Both categories can exchange capacitive or inductive reactive power with the AC network through, to some extent, small series impedances (usually small reactors).…”

Section: Introductionmentioning

confidence: 99%

Automatic Power Factor Correction Using a Harmonic-Suppressed TCR Equipped with a New Adaptive Current Controller

Obais

Pasupuleti²

2014

Journal of Power Electronics

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In this paper, a new continuously and linearly controlled capacitive static VAR compensator is proposed for the automatic power factor correction of inductive single phase loads in 220V 50Hz power system networks. The compensator is constructed of a harmonic-suppressed TCR equipped with a new adaptive current controller. The harmonic-suppressed TCR is a new configuration that includes a thyristor controlled reactor (TCR) shunted by a passive third harmonic filter. In addition, the parallel configuration is connected to an AC source via a series first harmonic filter. The harmonic-suppressed TCR is designed so that negligible harmonic current components are injected into the AC source. The compensator is equipped with a new adaptive closed loop current controller, which responds linearly to reactive current demands. The no load operating losses of this compensator are negligible when compared to its capacitive reactive current rating. The proposed system is validated on PSpice which is very close in terms of performance to real hardware.

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New Static VAR Control Using Forced-Commutated Inverters

Cited by 5 publications

References 0 publications

Development of a large‐capacity static var generator using self‐cornmutated inverters for improving power transmission system stability

Development of a large‐capacity static var generator using self‐cornmutated inverters for improving power transmission system stability

Design of a continuously and linearly controlled VSI-based STATCOM for load current balancing purposes

Automatic Power Factor Correction Using a Harmonic-Suppressed TCR Equipped with a New Adaptive Current Controller

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