Survey of Induced Voltage and Current Phenomena in GIS Substation

Seyed Mohammad Hassan Hosseini,Ghasem Nourirad,Hamed Imani

doi:10.19026/rjaset.7.456

Seyed Mohammad Hassan Hosseini, Ghasem Nourirad + Show 1 more

Open Access

https://doi.org/10.19026/rjaset.7.456

Copy DOI

Abstract

Induced capacitive voltage and current in high voltage GIS substation is one of the most significant phenomena that may have made some problems in this substation operation. At this study the various equipment of 420 KV Karoon4 substations such as powerhouses, input and output lines, bus-bar and bus-duct have simulated by applying EMTP-RV software. Then with the different condition of single-phase and three-phase faults on the lines in critical conditions, capacitive induction voltage and current by parallel capacitor with circuit breaker is surveyed. The results show the value of this induced current and voltage and that this critical conditions the breakers and dis-connector switches must be able to interrupt this value of current.

Highlights

Parallel capacitors with breaker contacts have been used to improve the performance of power circuit breaker for interrupting the single-phase to ground fault near the circuit breaker in GIS with the voltage rate of 300 KV and above
When the line side circuit breaker is opened, a value of voltage is transferred to bus bar through capacity or which is paralleled with circuit breaker
The voltage value that is produced on bus bar will be less than the primary voltage due to the voltage division between circuit breaker capacitor, other circuit breakers and the coupled capacitor which between GIS and ground

Summary

Introduction

Parallel capacitors with breaker contacts have been used to improve the performance of power circuit breaker for interrupting the single-phase to ground fault near the circuit breaker in GIS with the voltage rate of 300 KV and above. A value of voltage and current is induced to the network after the power circuit breaker interruption and due to the capacitor existence. Karoon 4 GIS substation has the voltage rate of 420 KV and double bus bar arrangement with by-pass disconnect switch.

Results

Conclusion