Electricity: single generator systems – Automatic control of generator or driving means – Speed or frequency of generator
Patent
1999-04-13
2000-10-31
Ponomarenko, Nick
Electricity: single generator systems
Automatic control of generator or driving means
Speed or frequency of generator
307 87, H02P 904
Patent
active
061408034
ABSTRACT:
A synchronous condenser (12) is synchronized with a power system (14) by modifying its rotational speed using a prime mover (18) while controlling the rate of change of rotational speed of the synchronous condenser (FIG. 1). With an open circuit breaker (16), the synchronous condenser (12) is brought to a rotational speed (44) close to a desired synchronizing speed (48). A clutch (20) operates between the prime mover (18) and the synchronous condenser (12) and disengages the prime mover (18) from operation once the synchronous condenser (12) is placed into operation with the power system (14). An excitation voltage is provided to the synchronization condenser (12) for providing an output voltage, which voltage is monitored. The rotational speed of the prime mover (18) is ramped at a desirable rate of change (46) for approaching an acceptable synchronizing speed (50). The rotor speed and system phase angles are monitored for bringing a desirable changing speed close to the synchronizing speed (48). By sensing a signal representative of the rate of change of rotational speed and filtering this sensed signal, a reliable acceleration signal is provided for use by an operator determining when to engage the synchronous condenser (12) with the power system (14). The breaker (16) is then closed when the speed of the synchronous condenser (12) is within the desired range of speeds (50), with a phase angle of the rotor appropriate for placing the synchronous condenser (12) in operation within the power system (14).
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Clayton Peter Jon
Hurley Joseph David
Ponomarenko Nick
Siemens Westinghouse Power Corporation
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