Characterization of ferroresonant modes in HV substation with CB grading capacitors

Escudero, Manuel; Dudurych, I.M.; Redfern, M.A.

doi:10.1016/j.epsr.2006.08.033

Cited by 32 publications

(29 citation statements)

References 7 publications

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“…roresonance in a power transformer has been observed for many years [44][45][46][47][48][49]. Simulations have been conducted for ferroresonance in CVT due to CB switching in a typical substation configuration adopted from Ref.…”

Section: Switching-caused Ferroresonance In Cvt Fer-mentioning

confidence: 99%

A review of ferroresonance in capacitive voltage transformer

Bakar

Khan

Kwang

et al. 2014

IEEJ Transactions Elec Engng

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Ferroresonance incidences in electrical power system have been commonly regarded as unexplained phenomenon, which is not critical for utility engineers. As a result, research conducted in this area is limited and the awareness on ferroresonance is relatively low among utility engineers. However, as the electrical system evolves, its complexity increases in line with the increasing risk of ferroresonance. As a result, this paper provides a consolidated review on the research conducted on ferroresonance to highlight its importance. This paper covers the fundamental inductor-capacitor pair for ferroresonance initiation and the modes of ferroresonance, followed by ferroresonance in capacitive voltage transformer (CVT), constituting its impact, initiation, and suppression techniques. The core focus in this paper is ferroresonance in CVT due to switching events, on which the documented literature is very scarce.

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Section: Switching-caused Ferroresonance In Cvt Fer-mentioning

confidence: 99%

A review of ferroresonance in capacitive voltage transformer

Bakar

Khan

Kwang

et al. 2014

IEEJ Transactions Elec Engng

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“…System remains chaotic until V in 5 4.9 pu and the system leaves the chaotic region at V in 5 4.93 pu. At point (7), the system has a single frequency and at point (6) the system leaves the chaotic region with multifrequency windows. When V in is further increased, two chaotic regions are created.…”

Section: Figurementioning

confidence: 99%

“…[21][22][23][24]. The chaotic ferroresonant behavior depends on several system parameters such as: source voltage amplitude, capacitance, resistance, core loss and initial conditions [7,17,21,25]. Also, Metal Oxide Arrester (MOA) and neutral resistance lead to damping and even elimination of chaotic oscillations.…”

Section: Introductionmentioning

confidence: 99%

Voltage transformer ferroresonance analysis using multiple scales method and chaos theory

et al. 2013

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In this article, the Multiple Scales Method is used to analyze the chaotic behavior and different types of fixed points in ferroresonance of voltage transformers considering core loss. This phenomenon has nonlinear chaotic dynamics and includes subharmonic, quasi-periodic, and also chaotic oscillations. In this article, the chaotic behavior and various ferroresonant oscillations modes of the voltage transformer is studied. This phenomenon consists of different types of bifurcations such as Period Doubling Bifurcation (PDB), Saddle Node Bifurcation (SNB), Hopf Bifurcation (HB) and chaos. The dynamic analysis of ferroresonant circuit is based on bifurcation theory. The bifurcation and phase plane diagrams are illustrated using a continuous method and linear and nonlinear models of core loss. To analyze ferroresonance phenomenon, the Lyapunov exponents are calculated via Multiple Scales Method obtaining Feigenbaum numbers. The bifurcation diagrams illustrate the variation of the control parameter. Therefore, the chaos is created and increased in the system.

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“…Due to nonlinearity behavior this phenomenon is nonpredictable and for a series of specified parameter different modes may be obtained in resolvents. These modes are normally classified as [7]:…”

Section: Introductionmentioning

confidence: 99%

A new modeling of Matlab transformer for accurate simulation of ferroresonance

Khorasani

Deihimi

2009

2009 International Conference on Power Engineering, Energy and Electrical Drives

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The main aim of this paper is to present a new modelling of transformers in Simulink/Matlab enabling to simulate slow transients more accurate than the existing models used in the software. In this paper, first several types of transformer cores and their magnetic behaviors are described. Next, for accurate simulation of slow transients, extended transformer models based on duality principle of magnetic circuits is introduced. Then, two conventional three-and five-legged core transformers are simulated in Simulink/Matlab and in order to verify accuracy of models, simulation results are compared with those obtained from measurements. Finally, ferroresonance simulations are examined by both the proposed models and existing transformer models in Matlab/Simulink. The comparison clearly shows inability of existing transformer models to study slow transients for transformers.

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Characterization of ferroresonant modes in HV substation with CB grading capacitors

Cited by 32 publications

References 7 publications

A review of ferroresonance in capacitive voltage transformer

A review of ferroresonance in capacitive voltage transformer

Voltage transformer ferroresonance analysis using multiple scales method and chaos theory

A new modeling of Matlab transformer for accurate simulation of ferroresonance

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