초록 ▼

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 brough

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).

대표청구항 ▼

[ That which is claimed is:] [1.] A method for operating a synchronous machine with a power system, which synchronous machine is driven by a prime mover and is operable with the power system through an electrical breaker, the method comprising the steps of:placing the breaker in an open condition;dr

[ That which is claimed is:] [1.] A method for operating a synchronous machine with a power system, which synchronous machine is driven by a prime mover and is operable with the power system through an electrical breaker, the method comprising the steps of:placing the breaker in an open condition;driving the prime mover for modifying the rate of change of rotational speed of the synchronous machine to a first rotational speed;changing the speed of the prime mover for advancing the speed of the synchronous machine toward a synchronizing speed useful with the power system;monitoring a rate of change in the speed of the synchronous machine;adjusting the rate of change of speed to a desired rate of change of speed for timely approaching the synchronizing speed;bringing the changing speed into a range of speeds proximate the synchronizing speed; andclosing the breaker when the speed of the synchronous machine is within the desired range of speeds for placing the synchronous machine in operation within the power system.