Analysis of switching surges generated by current interruption in an energy-storage coil
The paper presents an analysis of the transient voltages which are generated when the current in a large magnetic energy storage coil is interrupted by a dc vacuum circuit breaker. The effect of the various parameters in the circuit on the transient voltage is discussed. The self inductance of the dump resistor must be minimized to control the generated transient. Contrary to general belief, a capacitor across the coil is not an effective surge suppressor. In fact, the capacitor may excite oscillations of higher magnitude. However, a capacitor, in addition to a surge suppressor, may be used to modify the frequency components of the transient voltage so that these frequency components are not coincident with the natural frequencies of the coil. Otherwise, resonant oscillations inside the coil may attain damaging magnitudes. The capacitor would also reduce the steepness of the wavefront of the transient across the coil, thus reducing the nonlinear voltage distribution inside the coil.
- Research Organization:
- Los Alamos National Lab., NM (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6080923
- Report Number(s):
- LA-UR-81-3008; CONF-811040-75; ON: DE82002365
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
250100* -- Energy Storage-- Magnetic
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700203 -- Fusion Power Plant Technology-- Power Supplies
Energy Storage
CAPACITORS
CIRCUIT BREAKERS
CURRENTS
ELECTRIC CURRENTS
ELECTRIC POTENTIAL
ELECTRICAL EQUIPMENT
ENERGY STORAGE
EQUIPMENT
EQUIPMENT PROTECTION DEVICES
MAGNETIC ENERGY STORAGE
STORAGE
SUPERCONDUCTING COILS
SWITCHES