Simulation and experiment on a flexible control method for ferroresonance

Sima, Wenxia; Yang, Ming; Yang, Qing; Yuan, Tao; Zou, Mi

doi:10.1049/iet-gtd.2014.0046

Cited by 23 publications

(16 citation statements)

References 29 publications

(27 reference statements)

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“…where (T FR /2) = max π/nω . By evaluating (16), the equivalent input resistance during the ferroresonance is obtained (see (17)) where m = min (n). From (17), the equivalent input resistance depends on the ferroresonance mode and the output voltage V o and an adaptive R d ′ is obtained during the ferroresonance occurrence.…”

Section: Buck-boost Resistor Emulatormentioning

confidence: 99%

Electronic resistor emulators for ferroresonance damping in MV transformers

Bayona

Azcondo

Brañas

et al. 2018

IET Renewable Power Generation

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The occurrence of ferroresonances, due to the presence of voltage transformers in isolated-neutral in mediumvoltage (MV) distribution grids, results in overvoltages and overcurrents that may damage the connected equipment. To prevent this phenomenon, the protection windings of the MV transformers have to be properly loaded for damping purposes. Mitigation equipment based on resistors, passive/active circuits and static converters have been proposed in the literature. This study proposes a new variety of mitigation equipment based on very simple power electronic converters operated as configurable resistor emulators. The proposed approach is evaluated theoretically and validated experimentally. A resistor emulator proof of concept is designed and applied for damping ferroresonances due to the occurrence of line-to-ground faults in isolated-neutral MV distribution power systems.

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Section: Buck-boost Resistor Emulatormentioning

confidence: 99%

Electronic resistor emulators for ferroresonance damping in MV transformers

Bayona

Azcondo

Brañas

et al. 2018

IET Renewable Power Generation

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“…stray capacitance in transformer windings. 12 The transformer model is modeled using the π equivalent circuit. 13 R 1 and R 2 represent the primary and secondary ac resistances, respectively.…”

Section: Ferroresonance Simulation Model In Emtp-atpmentioning

confidence: 99%

Modeling of grain-oriented Si-steel and amorphous alloy iron core under ferroresonance using Jiles–Atherton hysteresis method

et al. 2017

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Amorphous alloy is increasingly widely used in the iron core of power transformer due to its excellent low loss performance. However, its potential harm to the power system is not fully studied during the electromagnetic transients of the transformer. This study develops a simulation model to analyze the effect of transformer iron core materials on ferroresonance. The model is based on the transformer π equivalent circuit. The flux linkage–current (ψ–i) Jiles–Atherton reactor is developed in an Electromagnetic Transients Program-Alternative Transients Program and is used to represent the magnetizing branches of the transformer model. Two ferroresonance cases are studied to compare the performance of grain-oriented Si-steel and amorphous alloy cores. The ferroresonance overvoltage and overcurrent are discussed under different system parameters. Results show that amorphous alloy transformer generates higher voltage and current than those of grain-oriented Si-steel transformer and significantly harms the power system safety.

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“…A ferroresonance circuit contains a saturable magnetising inductance and a capacitance. The inductance is usually related to a transformer and the capacitance belongs to a system capacitance or circuit breaker (CB) grading capacitance [1][2][3][4]. In some power systems, ferroresonance may include some types of nonlinear oscillations referred to fundamental, sub-harmonic and chaotic nonlinear resonance or ferroresonance [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Smart solid‐state ferroresonance limiter for voltage transformers application: principle and test results

Heidary

Radmanesh

2018

IET Power Electronics

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This study employs a novel smart solid state ferroresonance limiter (SSFL) for stabilising the chaotic behaviour of a voltage transformer (VT). It is shownthat the ferroresonance overvoltage in VTs includes some resonance modes that can be classified as a fundamental, sub-harmonic and chaotic oscillations. The effects of the suggested SSFL on decreasing the amplitude of the ferroresonance over-voltages are examined. To confirm the simulation results, a laboratory prototype is implemented and tested. The performance of the suggested SSFL is simulated using MATLAB software and experimental results are compared with the simulation results. The measurement and experimental results are in agreement and clearly show the ability of the suggested SSFL on ferroresonance cancellation and VT protection against the occurred overvoltage.

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Simulation and experiment on a flexible control method for ferroresonance

Cited by 23 publications

References 29 publications

Electronic resistor emulators for ferroresonance damping in MV transformers

Electronic resistor emulators for ferroresonance damping in MV transformers

Modeling of grain-oriented Si-steel and amorphous alloy iron core under ferroresonance using Jiles–Atherton hysteresis method

Smart solid‐state ferroresonance limiter for voltage transformers application: principle and test results

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