| 摘要 |
PROBLEM TO BE SOLVED: To provide an individual operation detector for rapidly, effectively detecting an individual operation of a synchronous generator and simplifying settling or the like for detecting the individual operation. SOLUTION: Individual operation detector for a synchronous generator obtains the frequency of an interlocking point of a frequency calculator 8A, obtains a change ratio (df/dt) by a frequency change ratio calculator 8B, obtains an amount proportional to the change ratio by a coefficient unit 8C, limits the amount by an output limiter 8D, and feeds back a positive voltage amount to an automatic voltage regulator 3A of the generator 3. In this case, the detector generates an infinitesimal change amount to be suppressed at the frequency change, when the generator is in an interlocked state and a change amount of a predetermined period, and superposes the change amount on a positive feedback amount to obtain a frequency change by the infinitesimal change amount, even in a state in which the load of a range of the individual operation is completely balanced with the output of the generator, thereby detecting the individual operation. It includes to superpose the change amount on the frequency change amount instead of the frequency changer ratio. |
