Power system and synchronizing breakers for a variable speed gen

Details Power system and synchronizing breakers for a variable speed gen Power system and synchronizing breakers for a variable speed gen

1988-08-09

1990-08-28

Shoop, Jr., William M.

Electricity: motive power systems

Generator-fed motor systems having generator control

318434, 361 31, H02H 708

Patent

active

049528521

ABSTRACT:
A generator-motor apparatus with economical protection measures for use in a variable speed pumping-up electric power plant, having a main transformer, a secondary winding of which is coupled to an electric power system, a power system breaker connected to a primary winding of the main transformer, a syncronizing breaker connected in series with the power system breaker, a generator-motor, a rotor of which is mechanically coupled to the pump-turbine and an armature winding of which is connected to the power system through the synchronizing breaker, the power system breaker and the main transformer, and an excitation circuit, including a frequency converter for supplying a field winding of the generator-motor with AC voltage of the variable frequency and a converter transformer for feeding the converter, which is branched from a junction of the power system breaker and the synchronizing breaker.

REFERENCES:
patent: 2735976 (1956-02-01), Danly
patent: 3581179 (1971-05-01), Jones
patent: 3660721 (1972-05-01), Baird
patent: 3873887 (1975-03-01), Barkan et al.
patent: 4021700 (1977-05-01), Ellis-Anwyl
patent: 4306265 (1981-12-01), Kuntner et al.
patent: 4631622 (1986-12-01), Howell
patent: 4682263 (1987-07-01), Gradnitzer et al.

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