Voltage transformer ferroresonance in 275 kV substation

Emin, Z.; Zahawi, Bashar; Tong, Y.K.

doi:10.1049/cp:19990562

Cited by 18 publications

(15 citation statements)

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“…The cause for this difference was already mentioned in the previous subsection and also implied in Table I, in that significantly higher losses of laboratory ferroresonant circuit results into a higher source voltage amplitude requirement for the initiation of ferroresonance [12,16]. Therefore, future work will address the decrease of losses of laboratory ferroresonant circuit to the value approximately equal to the losses of Dorsey converter station by introducing an active element in the network [17].…”

Section: Analytical and Numerical Solutionsmentioning

confidence: 79%

“…Consequently, as it is marked on Figure 9, the source voltage amplitude at which ferroresonance occurred in Dorsey converter station, Û ¼ 0:35Ê , Eqn (5a), is not part of the possible ferroresonant range for the laboratory ferroresonant circuit; that is, for this value of source voltage amplitude, ferroresonance cannot occur in the laboratory ferroresonant circuit. The cause for this difference was already mentioned in the previous subsection and also implied in Table I, in that significantly higher losses of laboratory ferroresonant circuit results into a higher source voltage amplitude requirement for the initiation of ferroresonance [12,16]. Therefore, future work will address the decrease of losses of laboratory ferroresonant circuit to the value approximately equal to the losses of Dorsey converter station by introducing an active element in the network [17].…”

Section: Analytical and Numerical Solutionsmentioning

confidence: 79%

“…The determination of possible ferroresonant range of an electrical power network is not possible practically, because the ferroresonance can destroy parts of the network [8,12], and consequently, it would be too expensive to investigate the ferroresonance on a ferroresonant part of electrical power network by varying the system parameter values. Therefore, the investigation will be carried out analytically, using harmonic balance method, and numerically, using Dormand-Prince method in a computer simulation.…”

Section: Parameter Values Of the Dorsey Converter Stationmentioning

confidence: 99%

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Investigation of possible ferroresonance for a voltage range: realisation of a system event with a laboratory set‐up

Miličević

Emin

2011

Circuit Theory & Apps

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SUMMARYThe paper presents an analytical and numerical investigation carried out on part of an electrical power network exhibiting ferroresonant behaviour as well as experimental investigation on its physical model. The investigations were carried out in order to estimate the extent of predicting the range of voltage source amplitude values at which the initiation of ferroresonance depends on values of initial conditions and phase shift. For this range of voltage source amplitude values (termed as possible ferroresonant range in the paper), the impact of initial conditions and phase shift of voltage source on the initiation of ferroresonance is determined using a numerical investigation and an experimental set-up. Reasons and consequences of disagreement of parameter values of the original and physical model are determined.

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Section: Analytical and Numerical Solutionsmentioning

confidence: 79%

Section: Analytical and Numerical Solutionsmentioning

confidence: 79%

Section: Parameter Values Of the Dorsey Converter Stationmentioning

confidence: 99%

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Investigation of possible ferroresonance for a voltage range: realisation of a system event with a laboratory set‐up

Miličević

Emin

2011

Circuit Theory & Apps

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“…This is a typical case of high voltage systems where a circuit breaker is connected in series with an open circuit, having a phase-to-ground voltage transformer installed (Figure 1) Opening the circuit breaker, phase-to-ground capacitance is discharged through the voltage transformer that is driven into saturation, provoking the ferroresonant oscillations. These oscillations are maintained by the energy supplied by the source through the circuit breaker grading capacitances [7][8][9][10][11][12].…”

Section: A Voltage Transformer Energized Through the Grading Capacitmentioning

confidence: 99%

Ferroresonant Configurations in Power Systems

Valverde¹,

Buigues²,

Mazón³

et al. 2024

RE&PQJ

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Over the last decades, power disturbances have become an important factor on the increase throughout electrical networks, which can exert an important influence over power quality ratios. Amongst them, it is worth mentioning ferroresonance, which is a special case of resonance involving non-linear inductances that mainly affects the functionality of transformers. Its effects are characterized by high sustained overvoltages and overcurrents with maintained levels of current and voltage waveform distortion, producing extremely dangerous consequences. The first step against ferroresonance is always to prevent it from appearing, so it is important to identify those electrical configurations prone to the appearance of the phenomenon. Therefore, this paper analyzes different ferroresonant configurations that may take place in power systems, highlighting some of the most relevant aspects of each configuration.

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“…Practical interests had been shown was in the 1930s, when it is shown that the use of series capacitors for voltage regulation could cause ferroresonance in distribution systems [3]. Ferroresonant behavior of a 275 kV potential transformer, fed from a sinusoidal supply via circuit breaker grading capacitance, is studied in [4]. The potential transformer ferroresonance from an energy transfer point of view has been presented in [5].…”

Section: Introductionmentioning

confidence: 99%

Effect of New Suggested Ferroresonance Limiter on the Stability Domain of Chaotic Ferroresonance in the Power Transformer with Linear Core Model

Radmanesh¹,

Fathi²,

Rostami³

2011

EPE

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This Paper studies the effect of new suggested ferroresonance limiter on controlling ferroresonance oscillations in the power transformer. It is expected that this limiter generally can control the ferroresonance. For studying these phenomena, at first ferroresonance is introduced and a general modeling approach is given. A simple case of ferroresonance in a three phase transformer is used to illustrate these phenomena. Then, effect of new suggested ferroresonance limiter on the onset of chaotic ferroresonance and control of these oscillations in a power transformer including linear core losses is studied. Simulation is done on a three phase power transformer while one of its phases is opened, and effect of varying input voltage on occurring ferroresonance overvoltage is studied. Results show that connecting the ferroresonance limiter to the transformer exhibits a great controlling effect on the ferroresonance overvoltage. Phase plane diagram, FFT analysis along with bifurcation diagrams are also presented. Significant effect on occurring chaotic ferroresonance, the range of parameter values that may lead to overvoltage and magnitude of ferroresonance overvoltage is obtained, showed and tabulated

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Voltage transformer ferroresonance in 275 kV substation

Cited by 18 publications

References 0 publications

Investigation of possible ferroresonance for a voltage range: realisation of a system event with a laboratory set‐up

Investigation of possible ferroresonance for a voltage range: realisation of a system event with a laboratory set‐up

Ferroresonant Configurations in Power Systems

Effect of New Suggested Ferroresonance Limiter on the Stability Domain of Chaotic Ferroresonance in the Power Transformer with Linear Core Model

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