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Effect of power frequency excitation character on ferroresonance in neutral-grounded system |
| Hui Meng(惠萌)† and Liu Chong-Xin(刘崇新) |
| School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, China |
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Abstract In most earlier ferroresonance studies the traditional excitation characteristic of iron core, in which the traditional excitation characteristic contains harmonic voltages or currents, has been used as if it were made up of pure fundamental voltage or current. However, this is not always true. In comparison with traditional excitation characteristics, this paper introduces the power frequency excitation characteristic of the iron core, which contains no harmonics. The power frequency excitation characteristic of iron core has been obtained by Elector Magnetic Transient Program, resulting in discrete voltage and current pairs. Extensive simulations are carried out to analyse the effect of power frequency excitation characteristic on potential transformer ferroresonance. A detailed analysis of simulation results demonstrates that with power frequency excitation characteristic of iron core inclusion at certain excitation voltage the ferroresonance may happen, conversely it may not happen with traditional excitation characteristic inclusion.
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Received: 11 January 2010
Revised: 01 June 2010
Accepted manuscript online:
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PACS:
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84.70.+p
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(High-current and high-voltage technology: power systems; power transmission lines and cables)
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Cite this article:
Hui Meng(惠萌) and Liu Chong-Xin(刘崇新) Effect of power frequency excitation character on ferroresonance in neutral-grounded system 2010 Chin. Phys. B 19 120509
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