Step up transformers neutral grounding resistor effect on an industrial network transient stability

Author

Izadfar, Hamid R. ; Shokri, S. ; Sheibani, A.

Author_Institution

Dept. of Power Eng., K.N.T. Univ.

Volume

3

fYear

2005

fDate

29-29 Sept. 2005

Firstpage

1717

Abstract

Bandar Imam Petrochemical Complex (BIPC) has 4 electric synchronous and induction motors in medium (6.6 kV and 3.3 kV) level. Stability of this network is affected by many subjects. One of them is main transformer neutral grounding system. In this time, it is solidly grounded. But studies for modification of it has done and it changes to resistance grounding. Frequently short circuit faults in 66 kV level, in addition to high fault currents, cause voltage drop on 66 kV and medium voltage levels. This imposes high unbalance voltage on motors terminal voltage. If grounding system changed, voltage drop can be reduced. This paper describes BIPC medium voltage motors behavior in 2 different grounding systems

Keywords

earthing; fault diagnosis; induction motors; petrochemicals; power generation faults; power system transient stability; power transformer protection; synchronous motors; 3.3 kV; 6.6 kV; 66 kV; Bandar Imam Petrochemical Complex; induction motors; industrial network transient stability; motor terminal voltage; network stability; resistance grounding; short circuit faults; step up transformers neutral grounding resistor effect; synchronous motors; voltage drop; Circuit stability; Electric resistance; Electrical equipment industry; Grounding; Induction motors; Medium voltage; Petrochemicals; Resistors; Synchronous motors; Transformers;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems, 2005. ICEMS 2005. Proceedings of the Eighth International Conference on

Conference_Location

Nanjing

Print_ISBN

7-5062-7407-8

Type

conf

DOI

10.1109/ICEMS.2005.202852

Filename

1575049