Series-capacitor compensation equipment

Details Series-capacitor compensation equipment Series-capacitor compensation equipment

1994-12-19

1996-04-23

Deboer, Todd

Electricity: electrical systems and devices

Safety and protection of systems and devices

Capacitor protection

361 58, 361126, H02H 904

Patent

active

055109420

ABSTRACT:
This series-capacitor compensation equipment comprises a series-capacitor bank in series with a power line and an overvoltage protection circuit for the capacitor bank comprising the series combination of a surge arrester and electric bus structure connected in series with the power line and in parallel with the capacitor bank. The surge arrester includes metal-oxide varistor elements which impart a relatively high resistance to the arrester when the voltage across the arrester is in a normal range and a relatively low resistance when the voltage across the arrester rises to a predetermined value that produces arrester operation. The capacitor bank will discharge through the overvoltage protective circuit should a varistor element fail during arrester operation. The bus structure comprises stainless-steel bus conductor having a resistance that is sufficiently high to effectively limit the energy duty on the arrester during discharge of the capacitor bank through the overvoltage protection circuit in the event of failure of a varistor element during arrester operation.

REFERENCES:
patent: 4164772 (1979-08-01), Hingorani
patent: 4652963 (1987-03-01), Fahlen

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