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    • 7. 发明授权
    • Reactive power compensator
    • 无功补偿器
    • US08648576B2
    • 2014-02-11
    • US13167926
    • 2011-06-24
    • Akihiro MatsudaYoshiyuki KonoMasatoshi Takeda
    • Akihiro MatsudaYoshiyuki KonoMasatoshi Takeda
    • G05F1/70
    • H02J3/1828H02J3/1878Y02E40/12Y10T307/669
    • A first SVC is connected to a first bus. A first SVC control unit controls the first SVC. A first fluctuation-component-voltage generating unit includes a voltage reference circuit that outputs a voltage reference value. A second SVC is connected to a second bus. A second SVC control unit controls the second SVC. A second fluctuation-component-voltage generating unit includes a first-order-lag control block with limiter that generates a comparative voltage that follows a bus voltage of the second bus with a predetermined time lag characteristic and is limited within a predetermined range. An impedance value XS1 of slope reactance of the first SVC is set smaller than impedance value XS2 of slope reactance of the second SVC.
    • 第一个SVC连接到第一个总线。 第一SVC控制单元控制第一SVC。 第一波动分量电压产生单元包括输出电压基准值的电压基准电路。 第二SVC连接到第二总线。 第二SVC控制单元控制第二SVC。 第二波动分量电压产生单元包括具有限制器的一阶滞后控制块,其产生具有预定时间滞后特性并遵循第二总线的总线电压的比较电压并被限制在预定范围内。 将第一SVC的斜率电抗的阻抗值XS1设定为小于第二SVC的斜率电抗的阻抗值XS2。
    • 8. 发明授权
    • Reactive power control apparatus for AC power system
    • 交流电源系统无功功率控制装置
    • US07692415B2
    • 2010-04-06
    • US11797077
    • 2007-04-30
    • Satoshi YasudaMasatoshi TakedaHitoshi Teramoto
    • Satoshi YasudaMasatoshi TakedaHitoshi Teramoto
    • G05F1/70
    • G05F1/70H02J3/1864Y02E40/12
    • A reactive power control apparatus for an AC power system includes a reactive power compensation device, a compensation capacitor device and a compensation capacitor control device. The compensation capacitor control device includes a detection voltage output circuit which outputs a bus detection voltage after the clearing of a voltage drop abnormality, corresponding to the AC voltage of a system bus after the voltage drop abnormality that occurred in the AC power system has been cleared, and a compensation capacitor control circuit which controls the connection status of a compensation capacitor with respect to the system bus. The compensation capacitor control circuit controls the connection status of the compensation capacitor with respect to the system bus, on the basis of the voltage level of the bus detection voltage after the clearing of the voltage drop abnormality.
    • 一种用于交流电力系统的无功功率控制装置,包括无功补偿装置,补偿电容器装置和补偿电容器控制装置。 补偿电容器控制装置包括检测电压输出电路,其在清除电压降异常之后输出对应于在AC电力系统中发生的电压降异常之后的系统总线的AC电压已经被清除的总线检测电压 以及补偿电容器控制电路,其控制补偿电容器相对于系统总线的连接状态。 补偿电容器控制电路根据总线检测电压在清除电压降异常之后的电压电平来控制补偿电容器相对于系统总线的连接状态。
    • 10. 发明授权
    • Harmonic suppressing device
    • 谐波抑制装置
    • US4812669A
    • 1989-03-14
    • US66203
    • 1987-06-25
    • Masatoshi TakedaKazuo IkedaYoshiharu TominagaKenji Mori
    • Masatoshi TakedaKazuo IkedaYoshiharu TominagaKenji Mori
    • G05F1/70H02J3/01H02M1/084H02M1/12H02P13/30H02J3/18
    • H02J3/01H02M1/084Y02E40/40Y10T307/25
    • A harmonic suppressing device provided in a power system such as, for example, a transmission and distribution system or a power generating system, to filter higher harmonic currents generated by a higher harmonic current source of the power system such as, for example, a cycloconverter. The harmonic suppressing device comprises, as the principal components thereof, a passive filter serving as a high-order higher harmonic filtering unit for filtering higher harmonic currents of comparatively high order among those generated by the higher harmonic current source, and an active filter serving as low-order higher harmonic filtering unit for filtering higher harmonic currents of comparatively low orders among those generated by the higher harmonic current source. The active filter comprises: a main active filtering circuit comprising a plurality of switching transistors, rectifying diodes combined with the switching transistors, respectively, a capacitor, and a reactor; an operating circuit which calculates controlling data for controlling the commutating action of the main active filtering circuit on the basis of the detected values of the higher harmonic currents that flows into the power source side of the power system and the detected values of the output voltage of the higher harmonic current source; and a control circuit which gives control signals such as, for example, pulse width modulating signals to the main active filtering circuit. The harmonic suppressing device is capable of filtering higher harmonic currents in a wide frequency band.
    • 一种谐波抑制装置,其设置在例如输配电系统或发电系统的电力系统中,以过滤由电力系统的高次谐波电流源产生的高次谐波电流,例如循环换流器 。 谐波抑制装置作为其主要部件包括用作高次谐波滤波单元的无源滤波器,用于对由高次谐波电流源产生的高次谐波电流进行滤波,并且将有源滤波器用作 低次谐波滤波单元,用于过滤由高次谐波电流源产生的较低阶的较高次谐波电流。 有源滤波器包括:主有源滤波电路,包括多个开关晶体管,分别与开关晶体管组合的整流二极管,电容器和反应器; 运算电路,其基于流入电力系统的电源侧的高次谐波电流的检测值和电力系统的输出电压的检测值,计算用于控制主有源滤波电路的换向动作的控制数据 高次谐波电流源; 以及控制电路,其向主要有源滤波电路提供诸如脉冲宽度调制信号的控制信号。 谐波抑制装置能够在宽频带中滤除高次谐波电流。