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1. 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。

2. 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。

3. 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.

4. 发明专利

JP2516210B2 失效
公开(公告)号：JP2516210B2
公开(公告)日：1996-07-24
申请号：JP6906887
申请日：1987-03-25
申请人： HITACHI LTD
发明人： GOTO MASUO , NOHARA GOO , KANO YASUNOBU
IPC分类号： H02P9/04

5. 发明专利

JPH06245385A METHOD AND APPARATUS FOR STABILIZING POWER SYSTEM 失效
公开(公告)号：JPH06245385A
公开(公告)日：1994-09-02
申请号：JP2894693
申请日：1993-02-18
申请人： HITACHI LTD , CHUBU ELECTRIC POWER
发明人： FUJITA HIDENORI , KUREBAYASHI HISASHI , TAKAHAMA AKIRA , NOHARA GOO , GOTO MASUO
IPC分类号： H02J3/24
摘要： PURPOSE:To stabilize a power system based on a time change of effective power and reactive power to control phase shift of a phase-shift transformer at the time of a fault. CONSTITUTION:The apparatus for stabilizing a power system comprises phase shift control means 13 for calculating effective power and reactive power from voltage and current of the system to decide a phase shift amount responsive to it, time deciding means 12 for obtaining time changes of the effective and reactive powers to decide a time in which the time change of the effective power is increased and the time change of the reactive power is decreased, and switching means 15 for switching outputs of fault control means 11 for outputting a preset phase shift amount from lapse of set time to output of the means 12, the means 13 and the means 11.

6. 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

7. 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.

8. 发明专利

JPS6416223A INTER-SERIES CHECKING METHOD 失效
公开(公告)号：JPS6416223A
公开(公告)日：1989-01-19
申请号：JP17099187
申请日：1987-07-10
申请人： HITACHI LTD
发明人： NOHARA GOO , GOTO MASUO
IPC分类号： H02J3/38
摘要： PURPOSE:To improve the reliability, by transmitting/receiving power calculated respectively for two series and then obtaining an average level and selecting a generator to be interrupted based on the average level. CONSTITUTION:An average effective power between series A and B is calculated based on effective power C1A-C3A is series A and effective power C1B-C3B in series B. No control is made for an average frequency lower than a judging level. When the average frequency is higher than the judging level, an interruption signal is fed through a signal line C4A to a circuitbreaker CB1 if the absolute value of a difference between the average effective power and a comparison level is equal to or lower than the judging level so as to separate a generator G1 from the system. If the average effective power is lower than the comparison level, an interruption signal is fed through a signal line C5A to a circuitbreaker CB2 so as to separate a generator G2 from the system. If the average effective power is higher than the comparison level, an interruption signal is fed through a signal line C6A to a circuitbreaker CB3 so as to separate a generator G3 from the system. Consequently, the reliability can be improved.

9. 发明专利

JPS63285472A DETECTING DEVICE OF FREQUENCY 失效
公开(公告)号：JPS63285472A
公开(公告)日：1988-11-22
申请号：JP12159887
申请日：1987-05-19
申请人： HITACHI LTD
发明人： NOHARA GOO , GOTO MASUO
IPC分类号： G01R23/02 , H02H3/46
摘要： PURPOSE:To enable precise frequency detection even at a low sampling rate by measuring the period of a cycle of voltage on the basis of a time point where a sampled value has a sign opposite to the previous one. CONSTITUTION:The state of inversion of a sampling value is detected on the basis of an instantaneous sampling voltage information obtained by sampling a voltage which is an object of detection. When the inversion of the sign thereof is detected, a voltage at the intermediate time point of two sampling values a1 and a2 used for said detection is assumed. Next, an input information, that is, a zero point a'1 of the voltage is assumed by using the information used for the detection of the sign inversion and an information at the intermediate time point. Based on an information on detection of this zero point, subsequently, a zero point of a subsequent period is detected from a zero point of minus, and a 1/2 period of the voltage is determined. Then, the reciprocal number of this period is calculated, so as to determine a frequency.

10. 发明专利

JPS63188775A EFFECTIVE VALUE AND ELECTRIC POWER DETECTION SYSTEM 失效
公开(公告)号：JPS63188775A
公开(公告)日：1988-08-04
申请号：JP2041787
申请日：1987-02-02
申请人： HITACHI LTD
发明人： NOHARA GOO , GOTO MASUO
IPC分类号： G01R21/133 , G01R19/02 , H02H3/02
摘要： PURPOSE:To calculate an accurate effective value regardless of variation in system frequency by calculating the effective value, active power, and reactive power from two sampling data in time series. CONSTITUTION:Multiplication parts 301 and 302 calculates the products of sampled values i1 and v2, and v1 and i2 of a current and a voltage respectively, and a block 303 subtracts the output of the multiplication part 302 to find v2i1-i2v1. A division part 304, on the other hand, divides a variation DELTAf in frequency by a reference value f0 of frequency and multiplication parts 305-307 halve the outputs of the division part 304 and multiplication parts 305 and 307. Further, an addition part 308 adds the outputs of the multiplication parts 305-307, an addition part 309 adds '1' to the output of the addition part 308, and a block 310 halves the output of the addition part 309 to obtain sinomegaDELTAt. A division part 311, on the other hand, divides the output of the block 303 by the output of the block 310 to obtain the reactive power Q. Thus, the accu rate effective value is calculated.

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