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    • 3. 发明专利
    • Power supply switching device
    • 电源开关装置
    • JP2008263672A
    • 2008-10-30
    • JP2007102697
    • 2007-04-10
    • Ntt Facilities Inc株式会社Nttファシリティーズ
    • YOSHIDA TADASHIKUROSAKI HIROSHITAKAGI SHINYA
    • H02J3/08G05F1/00
    • PROBLEM TO BE SOLVED: To provide a power supply switching device for economically executing a switching operation of an AC power supply unit. SOLUTION: The power supply switching device switches from an AC power supply unit to another AC power supply unit to supply AC power to a load apparatus when synchronization is established between the voltage, frequency, phase and voltage phase rotation direction of the AC power outputted from the previous AC power supply unit and those of the AC power outputted from the new AC power supply unit. The switching device detects the AC power supplied by the previous AC power supply unit and the AC power supplied by the new AC power supply unit respectively via transformers 16, 17, and inputs them to a phase check circuit 7 for comparing the phases. COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:提供一种用于经济地执行交流电源单元的开关操作的电源开关装置。 解决方案:当交流电源的电压,频率,相位和电压相位旋转方向之间建立同步时,电源开关设备从交流电源单元切换到另一个交流电源单元,为负载设备提供交流电源 从先前的交流电源单元输出的电力和从新的交流电源单元输出的交流电力的功率。 开关装置分别通过变压器16,17检测先前的交流电源单元提供的交流电力和由新的交流电源单元提供的交流电力,并将它们输入到用于比较相的相位检查电路7。 版权所有(C)2009,JPO&INPIT
    • 5. 发明专利
    • Electric power system synchronously paralleling method and synchronously making device
    • 电力系统同步并联方法和同步制造装置
    • JP2005080457A
    • 2005-03-24
    • JP2003310230
    • 2003-09-02
    • Hokuriku Electric Power Co Inc:The北陸電力株式会社
    • KOMAMI SHINTAROKANAO NORIKAZUUEDA TOMOYUKI
    • H02J3/08H02J3/42
    • PROBLEM TO BE SOLVED: To provide an electric power system synchronously paralleling method and a synchronously making device that can expand system making conditions while securing the accuracy of synchronous making and that can parallel systems speedily without missing the timing of synchronous paralleling.
      SOLUTION: In the electric power system synchronously paralleling method in which a plurality of the electric power systems are synchronously paralleled, a frequency difference Δf and a phase difference Δδ of power supplies of two systems to be synchronously paralleled are detected. Using the frequency difference Δf and phase difference Δδ, a value of energy function: U shown in the figure, where M: unit inertial constant (sec) of a single system, Δω: an angular frequency difference of two systems 2πΔf(rad/sec), X: impedance of a single system (p, u based on system capacity), Δδ: a radian value of the phase difference of the two systems 2πΔθ(° )/360(rad/sec), is calculated. On condition that the value of the energy function: U has come into a preset permissible range, a synchronously inputting command is output to a breaker 3.
      COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:提供同步并联方式的电力系统和同步制造装置,其可以在确保同步制造的精度的同时扩大系统制造条件,并且可以快速并行系统,而不会丢失同步并联的时序。 解决方案:在多个电力系统同步并联的同步并联方式的电力系统中,检测要同步并联的两个系统的电源的频率差Δf和相位差Δδ。 使用频差Δf和相位差Δδ,图中所示的能量函数值:U,其中单位系统的M:单位惯性常数(sec)Δω:两个系统的角频差2πΔf(rad / sec ),X:单个系统的阻抗(基于系统容量的p,u),Δδ:计算两个系统的相位差的弧度值2πΔθ(°)/ 360(rad / sec)。 在能量函数值U已经达到预设的允许范围的情况下,同步输入命令被输出到断路器3.版权所有:(C)2005,JPO&NCIPI