Ferroresonant oscillations in a transformer terminated line due to an energised parallel line on the same right-of-way

Saravanaselvan, R.; Ramanujam, R.; Al-Anbarri, Kassim A.; Naresh, Suru

doi:10.1049/ip-gtd:20045110

Cited by 7 publications

(3 citation statements)

References 15 publications

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“…It is possible to find ferroresonance cases in power transformers connected to de-energized transmission lines of considerable length, which run parallel to another energized line. Under these conditions, the capacitive coupling between both lines can drive the power transformer into ferroresonance [13,[47][48][49][50][51].…”

Section: G Power Transformer Connected To a De-energized Transmissiomentioning

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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Section: G Power Transformer Connected To a De-energized Transmissiomentioning

confidence: 99%

Ferroresonant Configurations in Power Systems

Valverde¹,

Buigues²,

Mazón³

et al. 2024

RE&PQJ

View full text Add to dashboard Cite

show abstract

“…Line coupling effects were considered and analysis was conducted with impedance matrices in an ABCD matrix style, but it did not provide a systematic way of forming an overall admittance matrix which is ready to be incorporated into general load flow programs. Parallel line model across different voltage levels was once explored in [5]; however, it was purely designed for investigating ferroresonant oscillations regarding transformer terminated conductors.…”

Section: Introductionmentioning

confidence: 99%

Analysis of unbalanced distribution lines with mutual coupling across different voltage levels and the corresponding impact on network voltage

Yan

Saha

2015

IET Generation, Transmission & Distribution

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In many countries, it is common for medium voltage (MV) and low voltage (LV) to share the same pole and power line corridor, and this has been a general practice for decades. The MV line and the LV line separation distance may be short under some situations; therefore the mutual coupling may become substantial, which can have a significant impact on network voltages. In the literature, such coupling effect is generally ignored, and there is a lack of a detailed model of the coupled MV and LV lines for incorporation into load flow programs. This study develops a model for unbalanced distribution lines considering the mutual coupling between different voltage levels. Then the established model is utilised in a current injection load flow program to analyse the MV/LV coupling impacts on distribution system voltage.

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“…This approach is straightforward but has some drawbacks [9]. Two other methods are based on the harmonic balance method [9][10][11] and on the principle of bifurcation theory and continuation technique [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Harmonic Balance Based Stability Domain Analysis of Period-1 Ferroresonance

Moradi

Gholami

2011

Electric Power Components and Systems

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In an attempt to find regions at risk of ferroresonance, different timedomain simulations and analytical approaches were investigated on a one-phase laboratory transformer. A 2D bifurcation diagram based on a one-term harmonic balance method has been developed. It was shown that increase of core losses during over-voltages significantly affects the stability domain of period-1 ferroresonance. Time-domain simulations show that a static core loss model as a function of the maximum flux of the transformer predicts the second bifurcation point with enough accuracy. This modeling approach was incorporated in harmonic balance analysis. A comparison has been made between analysis and measurements.

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Ferroresonant oscillations in a transformer terminated line due to an energised parallel line on the same right-of-way

Cited by 7 publications

References 15 publications

Ferroresonant Configurations in Power Systems

Ferroresonant Configurations in Power Systems

Analysis of unbalanced distribution lines with mutual coupling across different voltage levels and the corresponding impact on network voltage

Harmonic Balance Based Stability Domain Analysis of Period-1 Ferroresonance

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