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    • 4. 发明授权
    • Phase-control switchgear and phase-control method for switchgear
    • 开关柜的相位控制开关柜和相位控制方法
    • US08526155B2
    • 2013-09-03
    • US13129690
    • 2008-12-25
    • Sadayuki KinoshitaKenji KameiTomohito MoriHiroki Ito
    • Sadayuki KinoshitaKenji KameiTomohito MoriHiroki Ito
    • H01H73/00H02H7/00H02H3/00G05D17/00
    • H01H9/563
    • A phase-control switchgear includes a circuit breaker, a phase difference detection unit, a storage unit, and a circuit breaker control unit. The phase difference detection unit detects a phase difference between voltages of a specific phase (U-phase) of buses to which three-phase generators are respectively connected, at a plurality of time points. The storage unit stores the detected phase differences. When the three-phase generators are out of synchronization, the circuit breaker control unit estimates a breaking time point at which the phase difference between the voltages of the U-phase of the buses will be in the range of not less than −80° and not more than 80°, based on the phase differences at the plurality of time points stored in the storage unit. The circuit breaker control unit opens the circuit breaker to break a current at the estimated breaking time point. This makes it possible to suppress a transient voltage generated between electrodes of the circuit breaker after the current is broken.
    • 相位控制开关装置包括断路器,相位差检测单元,存储单元和断路器控制单元。 相位差检测单元在多个时间点检测分别连接有三相发电机的母线的特定相位(U相)的电压之间的相位差。 存储单元存储检测到的相位差。 当三相发电机不同步时,断路器控制单元估计总线的U相电压之间的相位差在-80°以上的断开时间点,以及 基于存储在存储单元中的多个时间点的相位差,不大于80°。 断路器控制单元打开断路器以在估计的断开时间点断开电流。 这使得可以在电流断开之后抑制断路器的电极之间产生的瞬态电压。