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1. 发明专利

JP2000224896A DC TRANSMISSION-CONTROLLING DEVICE 失效
公开(公告)号：JP2000224896A
公开(公告)日：2000-08-11
申请号：JP2520199
申请日：1999-02-02
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO , SHIKOKU ELEC POWER , ELECTRIC POWER DEV CO
发明人： SEKOGUCHI MASAHIRO , GOTO MASUO , MADORI IWAO , YOSHIZUMI TATSUNORI , AZUMA MASAKI , MURAKAMI HIROAKI , KATO KAZUO
IPC分类号： H02J3/36 , H02P9/00
摘要： PROBLEM TO BE SOLVED: To detect a frequency other than a shaft torsional vibration frequency region according to the bus voltage of a DC conversion station, and to efficiently suppress and control shaft torsion. SOLUTION: A device is equipped with frequency detectors 142a-142c that detect frequencies fa, fb, and fx of each phase according to phase voltages Va, Vd, and Vc of an AC bus 5 of a DC conversion station being connected to a generator 2, an averaging circuit 143 that obtains the average value of the frequencies fa, fb, and fc for detecting the frequency of the bus 5, a filter 144 and a judgment circuit 145 that detect shaft torsional vibration according fluctuation in the frequency of the bus 5, a filter 147 that detects a control signal for suppressing the detected shaft torsional vibration, and an adder 150 that adds the control signal to the output of a constant current-controlling device 149. By the output of the adder 150, the control angle of the DC conversion station is adjusted for suppressing the shaft torsional vibration.

2. 发明专利

JPH0576278B2 失效
公开(公告)号：JPH0576278B2
公开(公告)日：1993-10-22
申请号：JP7812886
申请日：1986-04-07
申请人： KANSAI ELECTRIC POWER CO , HITACHI LTD
发明人： HARAGUCHI EIJI , NAKAGAWA HIROTO , NOHARA GOO , GOTO MASUO
IPC分类号： H02J3/00 , H02P9/00 , H02P9/04 , H02P9/14

3. 发明专利

JPH03256599A GENERATOR UNIT FOR POWER SYSTEM SIMULATION 失效
公开(公告)号：JPH03256599A
公开(公告)日：1991-11-15
申请号：JP5169990
申请日：1990-03-05
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： NOHARA GOO , GOTO MASUO , YOSHIDA HIROTAKA , SUZAKI SHIRO
IPC分类号： H02J3/00 , H02P9/00
摘要： PURPOSE:To establish synchronism pull-in conditions in early stage by controlling the inner voltage of a generator unit according to the voltage difference and the frequency difference between the generator side and the system side. CONSTITUTION:A control unit CU is provided with signals from a potential transformer PTS arranged on the system S side wiring and a potential transformer PTG arranged on the generator unit G side wiring. When the voltage difference between the generator side and the system side is lower than a predetermined value, a command is provided to the generator unit G based on a command fed from an operating end Ta while simultaneously a throw-in command is provided to a circuit breaker CB. When the voltage difference exceeds the predetermined value, phase difference between the generator side and the system side is calculated and transmitted to the generator unit G thus performing synchronization control.

4. 发明专利

JPS63136999A COMMAND VALUE CALCULATION METHOD FOR VARIABLE SPEED PUMPING-UP GENERATOR SYSTEM 失效
公开(公告)号：JPS63136999A
公开(公告)日：1988-06-09
申请号：JP28179786
申请日：1986-11-28
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： NOHARA GOO , GOTO MASUO , HARAGUCHI EIJI , NAKAGAWA HIROTO
IPC分类号： H02P9/14 , H02P9/00 , H02P9/04
摘要： PURPOSE:To reduce the capacity of a cycloconverter by altering a target speed in case that the target speed is near a zero slip at the time of AFC operation of generating and pumping-up and passing it through the vicinity of the zero slip in a short time. CONSTITUTION:A command value calculator 15 calculates the opening command value HV and a target speed N0 of a guide vane in accordance with a static head H and an output command P0. A target speed controller 29 uses as the target speed the value N0 when the value N0 is out of an inhibiting zone and lower or upper limit value when in the inhibiting zone. A phase angle calculator 116 calculates the phase angle of a secondary winding on the basis of effective power, output command P0, target speed and the speed N, and applies it to a setter 17. Phase shifters 23a-23c excite a-, b-and c-phases in accordance with the excitation amount set by the setter 17. Thus, the capacity of a cycloconverter can be reduced.

5. 发明专利

JPS6343598A OPERATION CONTROLLER FOR VARIABLE-SPEED PUMP-STORAGE GENERATING SYSTEM 失效
公开(公告)号：JPS6343598A
公开(公告)日：1988-02-24
申请号：JP18682986
申请日：1986-08-11
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： NOHARA GOO , GOTO MASUO , HARAGUCHI EIJI , NAKAGAWA HIROTO
IPC分类号： H02P9/00 , H02P9/04
摘要： PURPOSE:To stably operate a variable speed pumping-up generator by adding a correction signal to a power control command value when the variation of the rotating speed of an induction machine is a constant value or higher and the rotating speed of the machine is displaced at predetermined value or more from a target value. CONSTITUTION:A power control command P0 is applied through a delay circuit 15 to a phase angle calculator 16, and an optimum guide vane opening Y is provided by an optimum opening function generator 25 according to a head H. A phase angle calculator 16 calculates a phase angle A/by an effective power output P and a power control command P0. A rotating speed N is applied to an immovable band circuit 30 and a differentiator 31, and the output of the differentiator 31 is applied to an immovable circuit 32. The outputs of the circuits 30, 32 are applied to an integrator 33, the output of the integrator is applied by an adder 34 to the output of the circuit 15. Thus, a system frequency is stably held, and an optimum operation control is performed.

6. 发明专利

JPS62100131A OPERATION CONTROL OF VARIABLE PUMPED-STORAGE GENERATING SYSTEM 失效
公开(公告)号：JPS62100131A
公开(公告)日：1987-05-09
申请号：JP23739085
申请日：1985-10-25
申请人： KANSAI ELECTRIC POWER CO , HITACHI LTD
发明人： HARAGUCHI EIJI , NAKAGAWA HIROTO , NOHARA GOO , GOTO MASUO
IPC分类号： H02J3/24 , H02P9/00 , H02P9/04 , H02P9/14

7. 发明专利

JPS61170299A OPERATION CONTROLLER OF VARIABLE SPEED POWER GENERATION SYSTEM 失效
公开(公告)号：JPS61170299A
公开(公告)日：1986-07-31
申请号：JP952585
申请日：1985-01-21
申请人： KANSAI ELECTRIC POWER CO , HITACHI LTD
发明人： HARAGUCHI EIJI , NAKAGAWA HIROTO , NOHARA GOO , GOTO MASUO , KUWABARA HISAO , BANDO AKIRA , ONO KENICHI
IPC分类号： H02P9/04
摘要： PURPOSE:To stably control to a target value at pumping up AFC operation time by controlling a governor valve opening in accordance head and the rotating speed at a pumping operation time. CONSTITUTION:In a variable speed power generation system having an induction generator with secondary excitation, the phase angle of the secondary exciting voltage is controlled by the difference between the command value of the power and the actual value. Further, the actual rotating speed of the generator is detected from a tachometer generator 11, input together with the head to a control instruction unit C, and the opening of a governor valve V is controlled to obtain the maximum efficiency. Thus, since the phase angle control of the secondary exciting voltage and the control of the opening of the governor valve are performed, it can be controlled at a target value stably in an AFC operation.

8. 发明专利

JPS6198200A Excitation control system 失效
标题翻译：激励控制系统
公开(公告)号：JPS6198200A
公开(公告)日：1986-05-16
申请号：JP21988484
申请日：1984-10-19
申请人： Hitachi Ltd , Kansai Electric Power Co Inc:The
发明人： KATO TADAATSU , NAKAGAWA HIROTO , NOHARA GOO , GOTO MASUO , SAWA SHUSUKE
IPC分类号： H02P9/00 , H02P9/14
CPC分类号： H02P9/14
摘要： PURPOSE:To suppress the variation in the terminal voltage of a variable speed regulator at system defect time by providing means for calculating the time of applying the strengthened amount of an excitation on the basis of a defect phase, a slip and a machine constant when a defect occurs at a system side. CONSTITUTION:A defect state discriminator 24 judges the phase and the degree of a defect from the voltage and the current of a generator. An exciting phase controller 25 calculates the phase to be strengthened in the excitation from the machine constant, operating state and the defect state on the basis of the signal from the discriminator 24. A calculator 27 takes the difference between a terminal voltage Et and a reference voltage EtO, and a converter 28 converts the output to a slip frequency. A switch 29 is closed when the output of the converter 28 is applied to the excitor. The closing time of the switch 29 is controlled by the output of the controller 25. A calculator 30 adds the exciting amount before strengthening the excitation from the converter 26 and the strengthened amount of the excitation from the switch 29, and supplies it to an excitation amount setter 17.
摘要翻译：目的：通过提供用于计算基于缺陷相位施加激励强度的时间的装置来抑制变速调速器在系统缺陷时的端电压的变化，当a 缺陷发生在系统侧。构成：缺陷状态鉴别器24根据发电机的电压和电流判断缺陷的相位和程度。励磁相位控制器25基于来自鉴别器24的信号，从机器常数，运行状态和缺陷状态计算激励中的相位。计算器27取终端电压Et和基准电压EtO，转换器28将输出转换成转差频率。当转换器28的输出施加到激励器时，开关29闭合。开关29的闭合时间由控制器25的输出控制。计算器30将加强来自转换器26的激励的激励量与来自开关29的激励强度相加，并将其提供给激励金额设定者17。

9. 发明专利

JPS6198197A Operation control system 失效
标题翻译：操作控制系统
公开(公告)号：JPS6198197A
公开(公告)日：1986-05-16
申请号：JP21988584
申请日：1984-10-19
申请人： Hitachi Ltd , Kansai Electric Power Co Inc:The
发明人： SUGIMOTO OSAMU , NOHARA GOO , GOTO MASUO , SAWA SHUSUKE
IPC分类号： H02P9/00 , H02P9/04
CPC分类号： H02P9/04
摘要： PURPOSE:To efficiently operate an electric generation and pumping-up state by controlling the valve opening of a governor in response to a speed deviation and controlling the exciting amount of the secondary exciter in response to a power deviation. CONSTITUTION:A command value calculator 15 calculates a governor opening command value HV and a speed command value N0 on the basis of a static head H and an output command P0. A corrector 26 corrects the value HV in response to the difference between the value N0 and a speed detection value N, and applies it to an opening setter 14. On the other hand, a phase difference angle calculator 16 calculates a phase difference angle in response to a deviation between an effective power P from an effective power lead 21 and the command P0. A setter 17 controls the exciting amounts of the exciting windings 22a-22c of an induction generator 1 in response to the outputs of a voltage regulator 18 and the calculator 16.
摘要翻译：目的：通过响应于速度偏差控制调速器的阀门开度来有效地操作发电和起动状态，并响应于功率偏差来控制次级励磁机的激励量。构成：指令值计算器15基于静态头H和输出指令P0计算调速器开度指令值HV和速度指令值N0。校正器26响应于值N0和速度检测值N之间的差值来校正值HV，并将其施加到打开设定器14.另一方面，相位差角度计算器16计算响应中的相位差角度到有效功率引线21的有效功率P与指令P0之间的偏差。响应于电压调节器18和计算器16的输出，设定器17控制感应发电机1的励磁绕组22a-22c的激励量。

10. 发明专利

JPH06233462A SYSTEM STABILIZING APPARATUS 失效
公开(公告)号：JPH06233462A
公开(公告)日：1994-08-19
申请号：JP1358293
申请日：1993-01-29
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： NOHARA GOO , GOTO MASUO , TAKAHAMA AKIRA , MATSUNO KATSUHIKO , YOSHIDA YOSHIO , FUJIMOTO SHIYAKU , KANEDA TOSHIBUMI
IPC分类号： H02J3/28 , H02J3/24
摘要： PURPOSE:To stabilize the power system by installing system stabilizing apparatus at both ends of a power fluctuation stabilizing target section within a power system. CONSTITUTION:System stabilizing apparatus are installed at points A1 and A2 of the stabilizing target section, and a power system impedance between points A1 and A2 is set to X0, power system impedance between power supply E1 and the point A1 is set to X1', and the power system impedance between the power supply E2 and the point A2 is set to X2'. If the injection power is P at the point A1 and is -P at the point A2, then the power flowing from the point A1 to point A2 becomes PX(X1'+X2')/(X1'+X0+X2'). Compared to (X1'+X2'), the impedance X0 is a small value so that (X1'+X2')/(X1'+X0+X2') becomes almost 1 and is almost equal to the injection power P. As started above, the injection power mostly flows into the stabilizing target section. By doing this, the power system can be stabilized.

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