초록 ▼

A power transfer control system for use in an AC electric power generation system comprises a generator control unit (GCU) which senses and controls the output of a generator, and a bus power control unit (BPCU) which communicates with the GCU to control and coordinate a power transfer between the g

A power transfer control system for use in an AC electric power generation system comprises a generator control unit (GCU) which senses and controls the output of a generator, and a bus power control unit (BPCU) which communicates with the GCU to control and coordinate a power transfer between the generator and another source. Each unit communicates power transfer information, which eliminates the requirement of redundant sensing circuitry and wiring for the BPCU. The BPCU transmits master power control information and a synchronizing signal indicating a zero phase reference point of a control waveform to which the power transfer will take place. The GCU compares parameters of the output power of its respective source with the master power control information and the synchronizing signal. The GCU adjusts its generator's output to track the master power control information, and generates delta phase information representing the phase displacement between said synchronizing signal and the output power of the first source. It also generates a power ready signal when a difference between said sensed parameters of the output power and said master power control information is less than a predetermined threshold. When the BPCU receives this information from the GCU, it initiates a no-break power transfer if the delta phase information is less than a predetermined threshold. The synchronizing signal is sent at a given interval representing the zero crossing at a given frequency of the master waveform. The BPCU may adjust this transmission rate upon variances of the master waveform.

대표청구항 ▼

[ I claim:] [1.] A power transfer control system for use in an AC electric power generation and distribution system having at least a first source and a second source of AC power, each of the sources being connectable to a load distribution bus through an associated switchable contactor, the second

[ I claim:] [1.] A power transfer control system for use in an AC electric power generation and distribution system having at least a first source and a second source of AC power, each of the sources being connectable to a load distribution bus through an associated switchable contactor, the second source being initially connected to the load distribution bus and supplying power thereto, the output power of at least the first source being sensed and controlled by a first generator control unit (GCU), the opening and closing of at least one of the switchable contactors being controlled by a bus power control unit (BPCU), comprising:first means within the BPCU for communicating with the GCU, said first means transmitting information to the first GCU including master power control information and a synchronizing signal indicating a zero phase reference point;second means within the first GCU for communicating with the BPCU;third means within the first GCU for comparing parameters of the output power of the first source with said master power control information and said synchronizing signal, said third means generating delta phase information representing the phase displacement between said synchronizing signal and the output power of the first source, said third means further generating a power ready signal when a difference between said sensed parameters of the output power and said master power control information is less than a predetermined threshold; andwherein said second means transmits said delta phase information and said power ready signal to the BPCU; andwherein a no-break power transfer is accomplished in response to the receipt of said power ready signal and said delta phase information being less than a predetermined threshold.