Electrical power generating system having parallel generator con

Details Electrical power generating system having parallel generator con Electrical power generating system having parallel generator con

1988-10-31

1989-10-17

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Connecting or disconnecting

307 85, H02J 110

Patent

active

048749613

ABSTRACT:
A power generation system (40), (120), is disclosed in which the phase and frequency of alternating current generated by one or more generators (14) is locked to the phase of alternating current generated by a master generator (12) or to an external power source (124). A master control unit (42), (122) contains a master count generator (52) which generates a synchronization count which is transmitted to each generator control unit (44). The synchronization count at any point in time of the master count generator is directly proportional to the phase of electrical current being generated by the master generator or the external power source. Each generator control unit (44) receives the synchronization count and compares the synchronization count with a locally generated synchronization count which is proportional to the phase of electrical current being generated by a generator controlled by the generator control unit receiving the synchronization count. The phase of the alternating current generated by the generators controlled by the each generator control unit receiving the synchronization count is adjusted as a function of the difference of the received and locally generated synchronization count to lock the phase and frequency of the alternating current with the phase and frequency of alternating current generated by the master generator or the phase and frequency of the external, power source.

REFERENCES:
patent: 3832713 (1974-08-01), Rubin
patent: 3887820 (1975-06-01), Glennon
patent: 4231029 (1980-10-01), Johnston
patent: 4260947 (1981-04-01), Massey
patent: 4308465 (1981-12-01), Lafuze
patent: 4598257 (1986-07-01), Southard
patent: 4707142 (1987-11-01), Baker et al.
patent: 4728806 (1988-03-01), Baker et al.
patent: 4754161 (1988-06-01), Fox

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