Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
METHOD AND APPARATUS FOR CONTROL OF PARALLEL-OFF OF GENERATOR
Document Type and Number:
Japanese Patent JP2001224134
Kind Code:
A
Abstract:

To provide a method and an apparatus, for the control of the parallel- off of a generator, in which the sound-side generator shaft of a generator main circuit can be protected from a generator-current zero-point transition phenomenon.

When the possibility of generation of the generator-current zero-point transition phenomenon can be estimated, individual electrical accident elements which cause the phenomenon, or the signal of the output of a generator lockout relay which integrates the elements in terms of a circuit, are used. A time delay by a timer is caused deliverately. Synchronization of an event is prevented. Alternatively, when the event can be estimated through calculation, the output of the reactive power of the generator is increased. As a result, a generator-excitation current control operation, in which the generator is paralleled off in such a way that the AC current amplitude of a sound-shaft generator is increased and that a current zero pint is eliminated is constituted, so as to be built in a control mechanism.


Inventors:
NANBA SHIGEAKI
UDA KENGO
FUKAI MASAYUKI
Application Number:
JP2000000210679
Publication Date:
August 17, 2001
Filing Date:
July 06, 2000
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
HITACHI LTD
International Classes:
H02H3/02; H02H7/06; H02J3/38; H02P9/00; H02P9/10; H01H33/00; (IPC1-7): H02J3/38; H02P9/00; H02P9/10
Attorney, Agent or Firm:
Sakuta Yasuo