Apparatus and Procedure for Calculating Short-Circuit Impedance to Determine Bus Fault Currents and Smart Inverter Settings

This paper presents the comprehensive implementation of Distributed Static Series Compensator (DSSC) to limit the fault currents in power systems. This is the first time that the limitation of fault currents with D-FACTS devices is addressed. DSSC is one of the D-FACTS families whichoperate in a similar manner as Static Synchronous Series Compensator (SSSC) but in smaller size, lower price and more capability. The effectiveness of the DSSC in fault current limitation is investigated through the series voltage effect upon the line. The short circuit current limitation strategy presented here exhibited that besides of the power flow control which is carried out by DSSC; it can also perform this additional function. In the following the potency of the DSSC in reduction of instantaneous voltage dip range during fault current limiting mode is clarified. Furthermore, it is disclosed that with performing more DSSC in the power system, the entire system voltage dip will be improved. In order to validate the claims, computer simulations using PSCAD/EMTDC are exploited.

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Methods of phasor algorithm applied on substation short-circuit impedance calculation analysis

2012 4th Electronic System-Integration Technology Conference ◽

10.1109/estc.2012.6485568 ◽

2012 ◽

Author(s):

Teng Yun ◽

Li Yong ◽

Li Yan

Keyword(s):

Short Circuit ◽

Impedance Calculation ◽

Calculation Analysis ◽

Circuit Impedance

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Harmonic analysis of arc suppression coil based on transformer with high short circuit impedance

Proceedings. International Conference on Power System Technology ◽

10.1109/icpst.2002.1053518 ◽

2003 ◽

Cited By ~ 3

Author(s):

Liu Zhizhen ◽

Chen Hongyan ◽

Yu Zhihao

Keyword(s):

Harmonic Analysis ◽

Short Circuit ◽

Arc Suppression Coil ◽

Circuit Impedance

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Calculation of Leakage Magnetic Field and Short-Circuit Impedance of Power Transformer

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.986-987.1767 ◽

2014 ◽

Vol 986-987 ◽

pp. 1767-1770

Author(s):

Fang Xu Han ◽

Yan Li ◽

Xin Sun ◽

Longnv Li

Keyword(s):

Magnetic Field ◽

Power Transformer ◽

Short Circuit ◽

Equivalent Circuit Model ◽

Simulation Software ◽

Secondary Development ◽

Element Analysis ◽

Leakage Magnetic Field ◽

Basic Language ◽

Circuit Impedance

The leakage magnetic field and equivalent circuit model of OLTC double-winding power transformer has been established by electromagnetic field Finite Element analysis software. The method of field-circuit coupled method has been used to calculate its magnetic field leakage, the short circuit impedance obtained by the calculation of formula and compared with the experimental data. At the same time, based on the calculation method for the Visual Basic language as a tool for MAGNET software for secondary development, obtain the software to calculate the short-circuit impedance of power transformer simulation software, and is verified by using the typical products, proves the validity of this software.

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