Influence of UHV Grid on Short-Circuit Current of Tianjin 500  kV Grid and Its Restrictive Measures

doi:10.3969/j.issn.1000-7229.2015.08.013

Abstract

Abstract:

With using the PSD-BPA software developed by China Electric Power Research Institute, this paper studied the influence of UHV grid on Tianjin 500 kV Grid in detail. The operation of UHV substation in Tianjin South has little influence on the current, voltage and transient stability level of Tianjin 500 kV Grid, but has large influence on the short-circuit current, which enhances the short-circuit level of Tianjin 500 kV substation, so as to the short-circuit current of Tianjin South and Jinghai substation exceeding the standard. According to the over-limitation problem of short-circuit current, this paper proposed three measures to limit the short-circuit current, analyzed three restrictive measures with using PSD-BPA software and verified those limiting effect. Finally, this paper compared these three measures from two aspects of the limiting effect for short-circuit current and the impact on the security and stability operation of power grid, and discussed the advantages and disadvantages of these three restrictive measures.

Key words: UHV, Tianjin 500 , kV Grid, short-circuit current, restrictive measures

CLC Number:

TM 726

LUO Tao, LIU Lixia, WANG Kui, LI Yuanyuan. Influence of UHV Grid on Short-Circuit Current of Tianjin 500 kV Grid and Its Restrictive Measures[J]. ELECTRIC POWER CONSTRUCTION, 2015, 36(8): 79-83.

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Influence of UHV Grid on Short-Circuit Current of Tianjin 500 kV Grid and Its Restrictive Measures

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