公开(公告)号：US5026256A

公开(公告)日：1991-06-25

申请号：US285753

申请日：1988-12-16

申请人： Takao Kuwabara ,  Hisao Inoue ,  Hiroto Nakagawa ,  Eizo Kita

发明人： Takao Kuwabara ,  Hisao Inoue ,  Hiroto Nakagawa ,  Eizo Kita

IPC分类号： F03B15/06

CPC分类号： F03B15/06 ,  Y02E10/226

摘要： The operation of a variable speed electric driven pump turbine is monitored continuously during pumping to detect the operation point of the pump turbine, and to prevent it from falling into a hump characteristic region, which is recognizable on a graph of total dynamic head versus flow rate. Stalling occurs in the hump characteristic region as a result of a partial reverse flow of the water with respect to the runner. When the operation point of the pump turbine approaches the hump characteristic region, a corrective action is taken that includes increasing the output level of the electric driven pump turbine to increase its rotating speed, temporarily.

公开(公告)号：US4920277A

公开(公告)日：1990-04-24

申请号：US230434

申请日：1988-08-10

申请人： Takao Kuwabara ,  Hiroto Nakagawa ,  Eizo Kita

发明人： Takao Kuwabara ,  Hiroto Nakagawa ,  Eizo Kita

IPC分类号： F03B15/06

CPC分类号： F03B15/06 ,  Y02E10/226

摘要： A variable speed hydro-power plant includes a pump turbine (2) having a S-shaped characteristics at the turbine operation. A current time turbine operating point is grasped on a turbine characteristics diagram of the pump turbine (2). A limit operation characteristics curve (nr) of the pump turbine (2) is formed in advance so as to not reach the S-shaped characteristics turbine operation region. A reach of the limit operation characteristics curve (nr) is detected, a rotating speed (N) of the pump turbine (2) is lowered. An inrush of the pump turbine (2) into the S-shaped characteristics turbine operation region is eliminated, so the continuation of a stable and reliable turbine operation can be guaranteed.

公开(公告)号：US5265002A

公开(公告)日：1993-11-23

申请号：US757334

申请日：1991-09-10

申请人： Akira Bando ,  Chikara Tanaka ,  Keiji Saito ,  Tadao Kawai ,  Eizo Kita ,  Keiichi Mitsuhashi ,  Yasuteru Oono ,  Hiroto Nakagawa

发明人： Akira Bando ,  Chikara Tanaka ,  Keiji Saito ,  Tadao Kawai ,  Eizo Kita ,  Keiichi Mitsuhashi ,  Yasuteru Oono ,  Hiroto Nakagawa

IPC分类号： H02H7/12 ,  H02H7/125 ,  H02M7/12 ,  H02M7/155 ,  H02M7/162

CPC分类号： H02H7/125

摘要： A semiconductor power conversion system comprising a multiphase bridge circuit which includes semiconductor devices having a controllable firing function and a reverse blocking characteristic, a gate control circuit which gives firing commands to the semiconductor devices, a short circuiting switch in which switching devices having a controllable firing function and a reverse blocking characteristic are connected in parallel with a DC output side of the multiphase bridge circuit, and a protection control device for performing a control for protecting the multiphase bridge circuit. The protection control device includes a device for detecting a commutation failure of the multiphase bridge circuit, and a device in response to the detection of the commutation failure for producing a blocking command for blocking the firing of the semiconductor devices of the multiphase bridge circuit and producing a short-circuiting command for firing the switching device which is short-circuited which bypasses current of the commutation failure. The protection control device further includes a device for detecting ending of a short-circuit based on the ceasing of current conduction of the short circuiting switch and for halting the blocking of the firing of the semiconductor devices of the multiphase bridge circuit.

摘要翻译： 一种半导体功率转换系统，包括多相桥式电路，其包括具有可控的点火功能和反向阻断特性的半导体器件，向半导体器件发出触发命令的栅极控制电路，其中具有可控射击的开关器件的短路开关 功能和反向阻断特性与多相桥式电路的直流输出侧并联连接，以及保护控制装置，用于进行保护多相桥式电路的控制。 保护控制装置包括用于检测多相桥式电路的换向故障的装置，以及响应于检测到换向失败的装置，用于产生用于阻断多相桥式电路的半导体装置的点火的阻塞命令并产生 用于点燃短路的开关器件的短路命令，其绕过换向故障的电流。 保护控制装置还包括用于基于短路开关的电流导通的停止以及用于停止多相桥式电路的半导体装置的点火来检测短路结束的装置。

公开(公告)号：US5099409A

公开(公告)日：1992-03-24

申请号：US496302

申请日：1990-03-20

申请人： Akira Bando ,  Chikara Tanaka ,  Keiji Saito ,  Tadao Kawai ,  Eizo Kita ,  Keiichi Mitsuhashi ,  Yasuteru Ohno ,  Hiroto Nakagawa

发明人： Akira Bando ,  Chikara Tanaka ,  Keiji Saito ,  Tadao Kawai ,  Eizo Kita ,  Keiichi Mitsuhashi ,  Yasuteru Ohno ,  Hiroto Nakagawa

IPC分类号： H02H7/12 ,  H02H7/122 ,  H02H7/125 ,  H02M7/162 ,  H02P9/00

CPC分类号： H02M7/1623 ,  H02H7/1255

摘要： An improved electric power conversion system comprising a multi-phase bridge circuit composed of semiconductors such as thyristors and an associated firing circuit. It is so constructed that: if the AC input current Iac flowing in the bridge circuit is equal to or larger in value that the DC output current Idc flowing out of the bridge circuit, it will be decided than an inner defect or fault is caused, and possible expansion of inner defect will be prevented by disabling the firing circuit to extinguish the thyristors in the bridge circuit, and if the AC input current Iac is smaller than the DC output current Idc in value, the bridge is permitted to continue the operation of power conversion, thus eliminating unnecessary interruption which otherwise would be caused by exterior disturbances. Also, an improved electric power conversion system may be equipped with a device to prevent an adverse effect from being caused by abnormal rise of thyristors' temperature.

公开(公告)号：US06602044B1

公开(公告)日：2003-08-05

申请号：US09697285

申请日：2000-10-27

申请人： Takao Kuwabara ,  Kei Katayama ,  Hiroto Nakagawa ,  Haruki Hagiwara

发明人： Takao Kuwabara ,  Kei Katayama ,  Hiroto Nakagawa ,  Haruki Hagiwara

IPC分类号： F04D1502

CPC分类号： F03B3/10 ,  F03B15/18 ,  Y02E10/223 ,  Y02E10/226 ,  Y02P70/525

摘要： A pump turbine includes a runner connected to a generator motor, a water discharge controller for adjusting the quantity of water passing through the runner and a governor for detecting a rotational speed of the runner and controlling the water discharge controller to get a predetermined rotational speed of the runner. Upon a load rejection which shuts off the generator motor from an electric power system, the governor is controlled to make a target speed value of the runner after a load rejection higher than a target speed value before the load rejection. The target speed value is a reference speed to be compared with actual speed so that the governor determines when or how to open or close a water discharge controller in response to a balance between the two speeds.

摘要翻译： 泵式涡轮机包括连接到发电机马达的流道，用于调节通过流道的水量的排水控制器和用于检测流道的转速的调速器，并且控制排水控制器以获得预定的转速 跑步者 在将发电机电动机从电力系统关闭的负载抑制下，调速器被控制以在负载抑制高于负载抑制之前的目标速度值之前使转轮的目标速度值成为目标速度值。 目标速度值是与实际速度进行比较的参考速度，以便调速器响应于两个速度之间的平衡来确定何时或如何打开或关闭排水控制器。

公开(公告)号：US5456115A

公开(公告)日：1995-10-10

申请号：US102041

申请日：1993-08-04

申请人： Takao Kuwabara ,  Ezo Kita ,  Isao Yokoyama ,  Hiroto Nakagawa ,  Yasuteru Oono

发明人： Takao Kuwabara ,  Ezo Kita ,  Isao Yokoyama ,  Hiroto Nakagawa ,  Yasuteru Oono

IPC分类号： F03B15/04 ,  F03B15/02 ,  F03B15/08 ,  F04B49/06 ,  F04D15/00 ,  F04D15/02 ,  G01H17/00

CPC分类号： F04D15/029 ,  F04B49/065 ,  F04D15/0027 ,  F04D15/0066 ,  Y02E10/226

摘要： A method of detecting a counterflow in a pump comprises providing with detecting means for detecting variations in the discharge pressure of the pump and signal analyzing means for analyzing oscillation components contained in an output signal from the pressure detecting means, and detecting the pump's operating point to have entered a counterflow characteristic operation region when a waveform of the detection signal generated in association with the variations in the discharge pressure of the pump exhibits a predetermined spectrum distribution. Further, when it is detected that the operating point enters a counterflow characteristic operation region, the escape from that region is performed by temporally throttling the guide vane and temporally increasing the rotating speed.

摘要翻译： 一种在泵中检测逆流的方法，包括提供检测装置，用于检测泵的排出压力的变化;以及信号分析装置，用于分析包含在来自压力检测装置的输出信号中的振荡分量，并且检测泵的工作点 当与泵的排出压力的变化相关联地生成的检测信号的波形呈现预定的频谱分布时，进入逆流特性操作区域。 此外，当检测到工作点进入逆流特性操作区域时，通过对导向叶片进行暂时节流并且暂时提高转速来执行从该区域的逸出。

公开(公告)号：US5561358A

公开(公告)日：1996-10-01

申请号：US360029

申请日：1994-12-20

申请人： Takao Kuwabara ,  Masataka Harada ,  Yasuteru Oono ,  Hiroto Nakagawa

发明人： Takao Kuwabara ,  Masataka Harada ,  Yasuteru Oono ,  Hiroto Nakagawa

IPC分类号： F03B15/04 ,  H02P9/00 ,  H02P9/04 ,  H02P9/42 ,  H02P23/00 ,  H02K7/18

CPC分类号： H02P9/42 ,  H02P2101/10 ,  Y02E10/226

摘要： A variable speed pumping up generator includes a first speed control unit for outputting a rotating speed command signal for controlling a pump turbine in accordance with a power output command and outputting an excitation control signal to an AC excitation unit of the generator, and a second speed control unit for controlling, in a generation mode, an amount of AC excitation from an AC excitation unit when a rotating speed of a rotary shaft departs from a lower limit setting or an upper limit setting. The setting is set in accordance with the rotating speed generated during a normal operation.

摘要翻译： 变速泵送发电机包括：第一速度控制单元，用于根据功率输出命令输出用于控制泵涡轮的转速指令信号，并将励磁控制信号输出到发电机的交流励磁单元;第二速度 控制单元，用于在发电模式下，当旋转轴的转速离开下限设定或上限设定时，控制来自交流励磁单元的交流励磁量。 该设定是根据正常运转时产生的转速设定的。

公开(公告)号：US06336322B1

公开(公告)日：2002-01-08

申请号：US09707843

申请日：2000-11-08

申请人： Takao Kuwabara ,  Kei Katayama ,  Hiroto Nakagawa ,  Haruki Hagiwara

发明人： Takao Kuwabara ,  Kei Katayama ,  Hiroto Nakagawa ,  Haruki Hagiwara

IPC分类号： F16D3100

CPC分类号： F16D33/08

摘要： An object of the present invention is to provide a pump turbine capable of improving the stability of the governor by fully lessening the influences by the S-characteristics even when the running point of the pump turbine is in the S-characteristics region. For this purpose, in a pump turbine comprising a runner which is coupled with a generator motor, discharge control apparatus for controlling the quantity of water passing through the runner, and a governor for controlling said discharge control apparatus to keep the runner speed at a predetermined speed, the arithmetic apparatus of said governor is controlled to temporarily open said closing discharge control apparatus in the leading half of the speed decrease or earlier after the first speed increase upon a load rejection turns to a speed decrease upon a load rejection which abruptly shuts off power from the generator motor, so that the rotational speed of the runner goes down at much slower rate than the rate of increasing immediately after a load rejection.

摘要翻译： 本发明的目的是提供一种能够通过充分减小S特性的影响来提高调速器的稳定性的泵式涡轮机，即使在泵用涡轮机的运转点处于S特性区域的情况下也是如此。 为此，在包括与发电电动机连接的转轮的泵式涡轮机中，用于控制通过转轮的水量的排放控制装置，以及用于控制所述排出控制装置的调速器，以将转轮速度保持在预定的速度 控制速度，所述调速器的运算装置被控制为在减速的前半部分中暂时打开所述关闭放电控制装置，或者在第一速度增加之后，当负载抑制转变为急剧关闭的负载抑制时的速度降低时 来自发电机电动机的动力，使得转轮的转速比在负载排斥后立即增加的速率慢得多的速度下降。

公开(公告)号：US5090872A

公开(公告)日：1992-02-25

申请号：US441639

申请日：1989-11-27

申请人： Takao Kuwabara ,  Ezo Kita ,  Isao Yokoyama ,  Hiroto Nakagawa ,  Yasuteru Oono

发明人： Takao Kuwabara ,  Ezo Kita ,  Isao Yokoyama ,  Hiroto Nakagawa ,  Yasuteru Oono

IPC分类号： F03B15/04 ,  F03B15/02 ,  F03B15/08 ,  F04B49/06 ,  F04D15/00 ,  F04D15/02

CPC分类号： F04D15/029 ,  F04B49/065 ,  F04D15/0027 ,  F04D15/0066 ,  Y02E10/226

摘要： A method of detecting a counterflow in a pump comprises providing with detecting means for detecting variations in the discharge pressure of the pump and signal analyzing means for analyzing oscillation components contained in an output signal from the pressure detecting means, and detecting the pump's operating point to have entered a counterflow characteristic operation region when a waveform of the detection signal generated in association with the variations in the discharge pressure of the pump exhibits a predetermined spectrum distribution. Further, when it is detected that the operating point enters a counterflow characteristic operation region, the escape from that region is performed by temporally throttling the guide vane and temporally increasing the rotating speed.

摘要翻译： 一种在泵中检测逆流的方法，包括提供检测装置，用于检测泵的排出压力的变化;以及信号分析装置，用于分析包含在来自压力检测装置的输出信号中的振荡分量，并且检测泵的工作点 当与泵的排出压力的变化相关联地生成的检测信号的波形呈现预定的频谱分布时，进入逆流特性操作区域。 此外，当检测到工作点进入逆流特性操作区域时，通过对导向叶片进行暂时节流并且暂时提高转速来执行从该区域的逸出。

公开(公告)号：US4823018A

公开(公告)日：1989-04-18

申请号：US46725

申请日：1987-05-07

申请人： Takao Kuwabara ,  Akira Bando ,  Eiji Haraguchi ,  Hiroto Nakagawa

发明人： Takao Kuwabara ,  Akira Bando ,  Eiji Haraguchi ,  Hiroto Nakagawa

IPC分类号： F03B15/06 ,  H02P9/04 ,  H02P9/42 ,  F02D29/06 ,  F01D15/10

CPC分类号： H02P9/42 ,  H02P2101/10 ,  Y02E10/226

摘要： A control system for a variable speed water turbine generator apparatus includes a first function generator that is responsive to an output command signal. The first function generator produces a rotation number command signal. A speed adjuster produces an output signal in accordance with a different signal between the first function generator output and an actual rotation number. An adder adds the generator output command signal to the speed adjuster output signal to determine an overall output command signal. An output aduster produces an output signal in accordance with a difference between the adder output and an actual power output of the generator for controlling the firing angles of the frequency converter. A second function generator, responsive to the generator output command signal, determines an opening command signal for the variable opening vanes. An opening adjuster produces an output signal in accordance with a difference signal between the second function generator output and an actual opening of the variable opening vanes to control the variable opening vanes. The first and second function generators increase command values for the rotation number and the variable opening vanes, respectively, as the output command signal increases. The frequency converter is further controlled to maintain the rotation number within a predetermined operation range.

摘要翻译： 用于变速水轮发电机装置的控制系统包括响应输出指令信号的第一功能发生器。 第一函数发生器产生旋转数指令信号。 速度调节器根据第一功能发生器输出和实际旋转数之间的不同信号产生输出信号。 加法器将发生器输出命令信号与速度调节器输出信号相加，以确定总输出命令信号。 输出电流源根据加法器输出与用于控制变频器的点火角的发电机的实际功率输出之间的差产生输出信号。 响应于发电机输出指令信号的第二功能发生器确定可变开启叶片的开启指令信号。 打开调节器根据第二功能发生器输出与可变开启叶片的实际开口之间的差分信号产生输出信号，以控制可变开启叶片。 第一功能发生器和第二功能发生器分别随着输出指令信号的增加而增加旋转数和可变开启叶片的指令值。 进一步控制变频器以将转数维持在预定的操作范围内。