Potential risk of failures in switching EHV shunt reactors in a one-and-a-half breaker scheme

Khodabakhchian, B.; Mahseredjian, Jean; Sehati, Mohammad reza; Mirhosseini, Mitra

doi:10.1016/j.epsr.2005.12.018

Cited by 9 publications

(7 citation statements)

References 2 publications

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“…Therefore, frequent switching is a significant characteristic of shunt reactors in order that they can react to the changing system load condition. Overvoltages caused by shunt reactor energization are important issue in the design of the relevant equipment (reactor, circuit breaker, insulation) of power systems and PSR schemes [20][21][22]. In this case, the following parameters are selected for shunt reactor overvoltages study:…”

Section: Evaluation Of Tl Models For Study Of Shunt Reactor Switchingmentioning

confidence: 99%

Investigation of Transmission Line Models for Switching Overvoltages Studies

Sadeghkhani

Ketabi

Feuillet

2013

International Journal of Emerging Electric Power Systems

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Overvoltages caused by switching operation of power system equipments might damage some equipment and delay power system restoration. This paper presents a comparison between transmission line (TL) models for overvoltages study and investigates which TL model is most proper for every case study. Both simulation time and accuracy factors of TL models are considered for selecting best TL model. Various cases of switching of transformer, shunt reactor, capacitor bank, and transmission line are investigated and simulation results for a partial of 39-bus New England test system, show that the proposed TL model evaluation increase accuracy and reduce simulation time (accelerate power system restoration) properly.

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Section: Evaluation Of Tl Models For Study Of Shunt Reactor Switchingmentioning

confidence: 99%

Investigation of Transmission Line Models for Switching Overvoltages Studies

Sadeghkhani

Ketabi

Feuillet

2013

International Journal of Emerging Electric Power Systems

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“…Due to diverse behaviour of the electrical arc, modelling of the CB with the ideal switch is considered to be a very simplified approach. The chopping current value can be calculated for a specific CB design and circuit parameters, using the following formula [3,21,22]:…”

Section: Models Of Circuit Breakermentioning

confidence: 99%

Switching transients in a 2 × 15 kV 16.7 Hz autotransformer railway system

Chmielewski

Oramus

Koska

2017

IET Generation, Transmission & Distribution

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“…1 Reactor failures have directed attention to the transient overvoltages generated by reactor switching. Shunt reactors are applied to regulate the reactive power balance of a system by means of compensating for the surplus reactive power generation of transmission lines.…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, frequent switching is a signi¯cant characteristic of shunt reactors in order that they can react to the changing system load condition. 1,2 As is well-known, if a sinusoidal current of an inductive element is interrupted before the natural current zero, high overvoltage of an oscillating nature can arise. The bigger the current chopped, the higher the overvoltage peak.…”

Section: Introductionmentioning

confidence: 99%

“…In this case the voltage across the open contacts becomes a surge input to the network, leading to transient overvoltages. 1 The fundamental requirement for all controlled switching applications is the precise de¯nition of the optimum switching instants. 3,4 This paper presents a novel method for controlled energization of shunt reactors in order to minimize transient overvoltages.…”

Section: Introductionmentioning

confidence: 99%

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Control of Shunt Reactor Overvoltages by Controlled Switching During Power System Restoration

Sadeghkhani

Ketabi

Feuillet

2012

J CIRCUIT SYST COMP

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The shunt reactors located on both line terminals and substation bus-bars are commonly used on long extra high voltage (EHV) transmission systems for controlling voltage during load variations. In a small power system that appears in an early stage of a black start of a power system, an overvoltage could be caused by core saturation on the energization of a shunt reactor with residual°ux. The most e®ective method for the limitation of the switching overvoltages is controlled switching since the magnitudes of the produced transients are strongly dependent on the closing instants of the switch. A harmonic index has been introduced that it's minimum value is corresponding to the best-case switching time. In addition, in this paper an arti¯cial neural network (ANN) is used to estimate the optimum switching instants for real time applications. ANN is trained with equivalent circuit parameters of the network, so that developed ANN is applicable to every studied system. To verify the e®ectiveness of the proposed index and accuracy of the ANN-based approach, two case studies are presented and demonstrated.

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Potential risk of failures in switching EHV shunt reactors in a one-and-a-half breaker scheme

Cited by 9 publications

References 2 publications

Investigation of Transmission Line Models for Switching Overvoltages Studies

Investigation of Transmission Line Models for Switching Overvoltages Studies

Switching transients in a 2 × 15 kV 16.7 Hz autotransformer railway system

Control of Shunt Reactor Overvoltages by Controlled Switching During Power System Restoration

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