To keep network frequency and voltage fixed basically, the correct disconnecting operation is ( ) for two generators with same capacity .
A. first increase oil throttle of remaining generator, then decrease oil throttle of disconnecting generator
B. first decrease oil throttle of disconnecting generator, then increase oil throttle of remaining generator
C. decrease oil throttle of two generators at the same time
D. decrease oil throttle of disconnecting generator, increase oil throttle of remaining generator, at the same time
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For two generators running in parallel, we can adjust ( ) to change active power distribution, adjust ( ) to change reactive power distribution.
A. exciting current/ oil throttle of the prime mover
B. exciting current /AVR
C. oil throttle of the prime mover / governor
D. oil throttle of the prime mover/ exciting current
For two generators running in paralel, the 1# generator shares much more active power than 2# generaor. We should ( ) to make the active power is distributed evenly.
A. regulate 2# governor servo motor to “fast” direction, 1# remains the same
B. regulate 2# governor servo motor to “slow” direction, 1# remains the same
C. regulate 2# governor servo motor to “fast” direction, regulate 1# governor servo motor to the opposite direction
D. regulate 2# governor servo motor to “slow” direction, regulate 1# governor servo motor to the opposite direction
To keep voltage and frequency of network fixed, if we shift active power of parallel running generators manually, we need to adjust ( ).
A. exciting current
B. voltage-sharing
C. oil throttle of the prime mover
D. AVR
For two same type generators running in parallel, if the speed regulation characters of the governor are different, when the total active power decreases, then ( ). ( running without automatic frequency adjustment and active power distribution devices)
A. the output power of the generator with smaller speed droop is smaller
B. the output power of the generator with bigger speed droop is smaller
C. the output power of the two generators are the same
D. A or B
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