Mitigation of geomagnetically induced and dc stray currents. Final report

Technical Report · Wed Nov 30 23:00:00 EST 1983

OSTI ID:5259365

Kappenman, J G

This report primarily describes several approaches to mitigate the effects of Geomagnetic Induced Currents (GIC) and dc stray currents in power systems; the engineering and design considerations for a neutral capacitor blocking device; and development and testing of a prototype device of this type. Modeling of the power system for computation of GIC are described. Results from three field tests, for documenting the effects of GIC by injecting direct current (dc) into the neutrals of the transformers, are presented. Several mitigation concepts are discussed and evaluated. The concept of blocking GIC and dc stray currents by a neutral capacitor is addressed in detail. The development and testing of the prototype blocking device is described. The technical requirements and specifications for the application of these devices are also included. A perspective on the economics of GIC mitigation is included. The effect of GIC and dc stray currents on HVdc converter operation, supported by computer simulations, is also discussed.

• Research Organization: Minnesota Power and Light Co., Duluth (USA)
• OSTI ID: 5259365
• Report Number(s): EPRI-EL-3295; ON: DE84920272
• Country of Publication: United States
• Language: English

Related Subjects

200300* -- Electric Power Engineering-- Power Transmission & Distribution-- (-1989)
24 POWER TRANSMISSION AND DISTRIBUTION
CAPACITORS
DC SYSTEMS
ELECTRICAL EQUIPMENT
ELECTRICAL TRANSIENTS
ENERGY SYSTEMS
EQUIPMENT
EQUIPMENT PROTECTION DEVICES
FIELD TESTS
HVDC SYSTEMS
POWER SYSTEMS
POWER TRANSMISSION LINES
TESTING
TRANSFORMERS
TRANSIENTS
VOLTAGE DROP