Lightning overvoltage protection of the paddock 362-145 kV Gas-Insulated Substation
- GE Industry and Utility Sales, Schenectady, NY (US)
- Wisconsin Power and Light Co., Madison, WI (USA)
Backflashovers close to the Paddiock 362-145 kV Gas-Insulated Substation (GIS) have been analyzed with the Electro-Magnetic Transient Program (EMTP) using a frequency dependent multi-conductor system. The severity of the lightning stroke currents were derived based on recent recordings in the eastern United States. Impacts of corona attenuation and distortion were accounted for using a shunt linear model approach. Turn-up effects of both line insulator flashover voltages and surge arrester protective characteristics were represented based on manufacturer's volt-time curves. Wave shaping effects of substation capacitances (ie., PT's transformers, CCPD's) were also modeled. Results show the importance of various modeling details in determining the overvoltages inside the GIS due to close backflashovers, which are caused by lightning strokes with varying intensity. These results are aimed at better evaluation of lightning protection requirements for GIS protected by metal-oxide surge arresters.
- OSTI ID:
- 5128908
- Journal Information:
- IEEE (Institute of Electrical and Electronics Engineers) Transactions on Power Delivery; (USA), Vol. 5:1; ISSN 0885-8977
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
29 ENERGY PLANNING
POLICY AND ECONOMY
GAS-INSULATED SUBSTATIONS
SELF-SHIELDING
LIGHTNING
ENVIRONMENTAL IMPACTS
CIRCUIT BREAKERS
ELECTRICAL TRANSIENTS
ELECTROMAGNETIC FIELDS
OVERVOLTAGE
OXIDES
USA
VAR CONTROL SYSTEMS
CHALCOGENIDES
CONTROL SYSTEMS
ELECTRIC DISCHARGES
ELECTRICAL EQUIPMENT
EQUIPMENT
EQUIPMENT PROTECTION DEVICES
NORTH AMERICA
OXYGEN COMPOUNDS
POWER SUBSTATIONS
SHIELDING
TRANSIENTS
VOLTAGE DROP
240201* - Power System Networks
Transmission & Distribution- AC Systems- (1990-)
296000 - Energy Planning & Policy- Electric Power