Thyristor controlled ground fault current limiting system for ungrounded power distribution systems

1996 ◽  
Vol 11 (2) ◽  
pp. 940-945 ◽  
Author(s):  
S. Sugimoto ◽  
S. Neo ◽  
H. Arita ◽  
J. Kida ◽  
Y. Matsui ◽  
...  
Keyword(s):  
Power Distribution ◽  
Distribution Systems ◽  
Fault Current ◽  
Power Distribution Systems ◽  
Ground Fault ◽  
Current Limiting

Recognition of the Single-Phase Ground Fault in Power Distribution System

2011 ◽  
Vol 480-481 ◽  
pp. 1581-1586
Author(s):  
Jun Zhang
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Distribution Systems ◽  
Single Phase ◽  
Transient State ◽  
Power Distribution Systems ◽  
Power Distribution System ◽  
Ground Fault ◽  
Analysis Computer ◽  
Novel Method

For power distribution systems, recognizing the single-phase ground fault is very difficult because there are several faults with similar features. This paper presents a novel method that can help to overcome this difficulty. The idea is to turns the original fault info into a whole system with transient state, steady state and transition state. Theoretical analysis, computer simulation and lab experiments verified the effectiveness of the proposed method.

Effect of Renewable Distributed Generators on the Fault Current Level of the Power Distribution Systems

2012 ◽  
Vol 622-623 ◽  
pp. 1882-1886
Author(s):  
Hadi Zayandehroodi ◽  
Azah Mohamed ◽  
Hussain Shareef ◽  
Masoud Farhoodnea ◽  
Marjan Mohammadjafari
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Distribution Systems ◽  
Short Circuit ◽  
Power Source ◽  
Current Level ◽  
Fault Current ◽  
Power Distribution Systems ◽  
Distributed Generator ◽  
Distributed Generators

The presence of renewable distributed generator (RDG) in a distribution system will have unfavorable impact on the operating system because the distribution system is no longer radial in nature and is not supplied by a single main power source. With RDGs in a distribution network, it brings about a change in the fault current level of the system and causes many problems in the protection system, such as false tripping of protective devices, protection blinding, an increase and decrease in short-circuit levels. This paper presents the effect of RDGs on the fault current level of the system. The operating protection issues particularly in cases where RDGs are added to a LV distribution feeder are also discussed.

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