Research of Installing Small Reactors on Neutral Points of 500 KV Autotransformers and the Analysis of Overvoltage

Yong Jian Li

doi:10.4028/www.scientific.net/AMM.34-35.1609

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 34-35Research of Installing Small Reactors on Neutral...

Research of Installing Small Reactors on Neutral Points of 500 KV Autotransformers and the Analysis of Overvoltage

Abstract:

Because of the extensive application of autotransformer in 500 kV power grid, the value of single-phase short-circuit current is generally greater than that of three-phase short-circuit current, or even greater than the maximum rated through current of the breaker. In order to reduce single-phase short-circuit current and avoid implement of bus split, this paper proposes to install small reactors on neutral points of 500 kV autotransformers. By analyzing and calculating the effect on short-circuit current limitation, the most suitable impedance value of small reactor is proposed. In addition，the overvoltage of the neutral point and insulation coordination are particularly discussed.

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Periodical:

Applied Mechanics and Materials (Volumes 34-35)

Pages:

1609-1613

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.34-35.1609

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Online since:

October 2010

Authors:

Yong Jian Li

Keywords:

Autotransformer, Insulation Coordination, Overvoltage, Single-Phase Short-Circuit Current

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References

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