Transient DC Side Short Circuit Currents of 12-phase generator-rectifier system

Author

Fang, Ming ; Fu, Lijun ; Ye, Zhihao

Author_Institution

Nat. Key Lab. for Vessel Integrated Power Syst. Technol.

fYear

2008

fDate

17-20 Oct. 2008

Firstpage

16

Lastpage

19

Abstract

Short circuit fault applied on the DC side of the 12-phase generator-rectifier system will cause large transient peak fault current. To design the new protection system, it is important to study the transient character of the fault current. In this paper, the characteristics of the DC side sudden short circuit of the 12-phase generator-rectifier system under the unloaded condition have been concluded. Expressions for the initial DC Side Short Circuit Currents (DSCC) and the rate of rise of the fault currents are presented. An equivalent model of the 12-phase synchronous generator (SG) at the moment of short circuit is given. Comparisons of simulated and computed results demonstrate the validity of the analytic approaches developed. Thus, a theoretical basis is provided for fast detection of the short circuit fault.

Keywords

machine protection; rectifying circuits; short-circuit currents; synchronous generators; transients; 12-phase synchronous generator-rectifier system; protection system; short circuit fault current; transient peak fault current; Analytical models; Character generation; Circuit faults; Circuit simulation; Computational modeling; DC generators; Fault currents; Protection; Short circuit currents; Synchronous generators;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems, 2008. ICEMS 2008. International Conference on

Conference_Location

Wuhan

Print_ISBN

978-1-4244-3826-6

Electronic_ISBN

978-7-5062-9221-4

Type

conf

Filename

4770639