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81. 发明专利

JPH0686455A PHASE CONTROLLER FOR AC-DC CONVERTER 失效
公开(公告)号：JPH0686455A
公开(公告)日：1994-03-25
申请号：JP25369892
申请日：1992-08-28
申请人： TOSHIBA CORP
发明人： NORO YASUHIRO
IPC分类号： H02J1/00 , H02J5/00 , H02M7/155
摘要： PURPOSE:To ensure transmission power as much as possible even when a nonlogical higher harmonic is difficult to be generated and there are the time of an unbalance fault and waveform distortion, and to prevent the generation of a commutation fault in a phase control circuit for an AC-DC converter. CONSTITUTION:In an AC-DC converter adjusting DC output voltage by a phase control system, a phase control circuit is composed of a pulse-spacing constant control type control circuit 16, each phase control type control circuit 15, a selective circuit 17 for these outputs, and a circuit 18 setting margins to these inputs.

82. 发明专利

JPH04333112A COOPERATIVE CONTROLLER FOR STATIC REACTIVE POWER COMPENSATOR 失效
公开(公告)号：JPH04333112A
公开(公告)日：1992-11-20
申请号：JP13204691
申请日：1991-05-08
申请人： TOSHIBA CORP
发明人： NORO YASUHIRO , IROKAWA SHOICHI
IPC分类号： G05F1/70 , H02J3/18
摘要： PURPOSE:To secure the balance among plural static reactive power compensators SVC by operating the current deviation to another SVC for compensation of the output and making an operating current follow a master SVC. CONSTITUTION:A current detection circuit 81 converts the output of a current transformer 3-1, i.e., the current of a master SVC into the effective value. An adder 82 detects the difference between the current of the master SVC and the current of a slave SVC (the output of current detection circuit 44). An arithmetic circuit 83 operates the current of the slave SVC so as to make this current follow the current of the master SVC. As a result, the output of the circuit 44 of the slave SVC is corrected by an adder circuit 84. In addition, the operating current of the slave SVC is corrected so as to make this current follow the current of the master SVC owing to the change of the control phase of a thyristor control reactor 6-2. That is, the operating current of a slave SVC can follow the current of a master SVC when both SVCs are set on the same bus of a power system. Thus a cooperative operation is secured between both SVCs.

83. 发明专利

JPS63209315A LIMITER CIRCUIT 失效
公开(公告)号：JPS63209315A
公开(公告)日：1988-08-30
申请号：JP4134287
申请日：1987-02-26
申请人： TOSHIBA CORP
发明人： NORO YASUHIRO
IPC分类号： G06G7/25 , H03G11/00
摘要： PURPOSE:To attain the man-hour having of control/management and automation by using a D/A converter, a comparator and an adder so as to form a circuit limiting an output voltage of a transfer function circuit thereby setting the limit voltage digitally. CONSTITUTION:An upper limit voltage is outputted from a D/A converter 1 in response to a digital setting value VHd and compared with an output voltage by a comparator circuit 2. The output of the circuit 2 is fed back to an adder 5 when the output voltage is larger and the output is lowered to the upper limit voltage. Then a lower limit voltage is outputted from a D/A converter 3 in response to a digital setting value VLd and compared with an output voltage by a comparator circuit 4. When the output voltage is smaller, the output of the circuit 4 is fed back to the adder 5 and the output is boosted up to the lower limit voltage. The upper/lower limit voltage is set digitally in this way, then the man-hour saving of control/management and automation are attained.

84. 发明专利

JP2002199584A POWER DEMAND AND SUPPLY ADJUSTING METHOD AND SYSTEM, AND MEMORY MEDIUM 失效
公开(公告)号：JP2002199584A
公开(公告)日：2002-07-12
申请号：JP2000393493
申请日：2000-12-25
申请人： TOSHIBA CORP
发明人： NAGASUGI MASANOBU , FUKUSHIMA NOBUO , HAYASHI HIDEKI , KISHIDA YUKIO , MIYAJI HIDEYUKI , KATO OSAYOSHI , KATO MASAICHI , NORO YASUHIRO , MURAI MASAHIKO
IPC分类号： G06Q50/00 , G06Q50/06 , H02J3/00 , G06F17/60
摘要： PROBLEM TO BE SOLVED: To provide a power demand-supply adjusting method that a provider adjusts the power demand and supply to make it profitable to each concerned by working between the power supply utility companies, IPP and end users. SOLUTION: The utility companies, independent power generating companies, end users, and power demand-supply adjusting companies exchange information through a network. The power demand-supply adjusting companies adjust and sells the power by purchasing from the utility companies and independent power generating companies. In this case, the adjusting companies are required to carry out the following steps: Step 1: to inform the utility companies and independent power generating companies and the end users about the sale and purchase of the power and to urge them to file their applications. Step 2: to calculate the profit and loss based on the information about the past charge, cost, transmission commissions and failure compensations supplied from the utility companies, the information about the past charge and cost supplied from the independent power generating companies and the past charge information supplied from the users upon application. Step 3: to calculate the profit and loss to the independent power generating companies based on the information supplied from them upon application. Step 4: to calculate the profit and loss to the end users based on the information supplied from the users upon application and the information about the new charge when contracted.

85. 发明专利

JP2000292252A MONITORING AND PROTECTIVE APPARATUS FOR SHAFT TWISTING VIBRATION 失效
公开(公告)号：JP2000292252A
公开(公告)日：2000-10-20
申请号：JP21319399
申请日：1999-07-28
申请人： TOSHIBA CORP
发明人： TANOMURA KENICHI , NORO YASUHIRO , SAKAKI YOSHITAKA , KAMIMURA YOICHI
IPC分类号： G01H1/10 , G01N3/32 , G01N3/34
摘要： PROBLEM TO BE SOLVED: To precisely detect a shaft twisting resonance even when a beat component is contained in a shaft twisting vibration. SOLUTION: In this apparatus, the speed of rotation of the shaft of a generator or a turbine is detected by a signal detection means 81, the vibration component signal at the natural oscillation frequency of the shaft of the generator is separated by a shaft-twisting-component separation means 82, the difference between a positive pole value and a negative pole value in one cycle of the vibration component signal is taken out in every separated shaft twisting vibration component so as to be processed by a preprocessing means 83, the generation or the tendency of the shaft twisting vibration of the generator is computed on the basis of its value so as to be evaluated by a shaft-twising-vibration evaluation means 84, and an abnormality judgment signal is output when the shaft twisting vibration is in an abnormality or in a divergence tendency.

86. 发明专利

JPH07177663A VOLTAGE FLUCTUATION SUPPRESSING UNIT 失效
公开(公告)号：JPH07177663A
公开(公告)日：1995-07-14
申请号：JP32395893
申请日：1993-12-22
申请人： TOSHIBA CORP
发明人： KIMURA MISAO , NORO YASUHIRO
IPC分类号： H02J3/18
摘要： PURPOSE:To suppress voltage fluctuation of an AC system by varying the DC voltage command value for a constant voltage controller based on the fluctuation component thereof and regulating consumption of reactive power in an AC/DC converter. CONSTITUTION:When a DC power command value(Pdp) is varied manually or by the output signal from an automatic frequency controller, a constant power controller 10 controls the DC current command value to increase or decrease based on the Pdp. Pole controllers 11, 12 control the control angle (alpha) so that the DC current matches the command value. Consequently, consumption of reactive power in the AC/DC converter also varies thus causing fluctuation in the voltage of AC system. In order to prevent the voltage fluctuation, capacitors 8-1, 8-2 for reactive power compensation are turned ON/OFF depending on the DC power. A detector 15 for detecting the variation of Pdp and a unit 16 for calculating the variation of DC voltage based on a signal from the detector 15 are also provided and the output signals therefrom are added to the DC voltage command value.

87. 发明专利

JPH0775250A CONTROLLER FOR AC-DC CONVERTER 失效
公开(公告)号：JPH0775250A
公开(公告)日：1995-03-17
申请号：JP21726093
申请日：1993-09-01
申请人： TOSHIBA CORP
发明人： KARIBE TAKASHI , NORO YASUHIRO , SAKANAKA YOSHINORI
IPC分类号： H02J1/00 , H02J3/34 , H02M7/155 , H02M7/757 , H02M7/77
摘要： PURPOSE:To provide stable operation continuously, by making minimum surplus- angle control according to a quantity of harmonic in an AC system. CONSTITUTION:A processing unit 36 calculates how many surplus angles should be added to a minimum surplus angle in order to prevent a failure in commutation on the basis of the amplitude, degree, and phase in high-frequency wave supplied from a high-frequency detecting unit 35. The result is entered in a cosine processing unit 37. A cosine component of the increased amount of the surplus angle from the cosine processing unit 37, a cosine component of a surplus angle from an surplus-angle processing unit 26, and a cosine component of an minimum surplus angle from a minimum surplus angle setting unit 27 are added by an adder 28, and the result is entered in a reverse-cosine processing unit 29. With minimum surplus-angle control according to the amount of harmonic in an AC system, the surplus angle is minimized in a range to prevent a failure in commutation and thereby stable operation is provided continuously.

88. 发明专利

JPH04303218A CONTROLLER FOR STATIONARY REACTIVE POWER COMPENSATING DEVICE 失效
公开(公告)号：JPH04303218A
公开(公告)日：1992-10-27
申请号：JP9369491
申请日：1991-03-29
申请人： TOSHIBA CORP
发明人： NORO YASUHIRO , IROKAWA SHOICHI
IPC分类号： G05F1/70 , H02J3/18
摘要： PURPOSE:To obtain a quick and stable response characteristic independently of the operating state of a thyristor switch capacitor(TSC) by providing a transfer function changing circuit and changing the transfer function in accordance with the extent of make of the TSC. CONSTITUTION:A transfer function changing circuit 41 is provided in a controller 3, and a transfer function circuit 34 is so constituted that the transfer function is selected or changed by the command of the transfer function changing circuit 41. The transfer function changing circuit 41 monitors the output of a make extent calculating circuit 36 of a TSC 6 and outputs a transfer function change command to the transfer function circuit 34 in accordance with the extent of make of the TSC 6. The transfer function circuit 34 has several kinds of transfer function, and the transfer function is so changed that a quick and stable response is always obtained. Since several kinds of transfer function are set in accordance with the extent of make of the TSC 6, one of them is selected or determined by operation at each time by the transfer function changing circuit 41.

89. 发明专利

JPH04101631A CONTROL SYSTEM FOR STATIC-TYPE REACTIVE POWER COMPENSATION DEVICE 失效
公开(公告)号：JPH04101631A
公开(公告)日：1992-04-03
申请号：JP21591390
申请日：1990-08-17
申请人： TOSHIBA CORP
发明人： NORO YASUHIRO
IPC分类号： H02J3/18
摘要： PURPOSE:To obtain a control system for a static-type reactive power compensation device which has rapid and stable response characteristics even after the configuration of a power system is altered by changing a transfer function when the opening and closing frequency of a control semiconductor switch for a system current per the specified period of time exceeds the set value. CONSTITUTION:Monitoring the output of a TSC control circuit 35, a circuit 41 to measure the ON and OFF frequency of a TSC outputs the ON and OFF frequency of the TSC per the specified period of time which is set by a timer 42. A comparison circuit 43 compares the ON and OFF frequency of the TSC with the set frequency which is determined by a frequency setting circuit 44. When the actual frequency exceeds the set one, it is considered that a system configuration changes and therefore the TSC has a hunching. To stop the hunching of the TSC for a stable response, a transfer function of the transfer function circuit 34 is modified. The transfer function of the transfer function circuit 34 which has been modified should be returned to the original condition by the output of a return circuit 45.

90. 发明专利

JPS6346010A NON-LINEAR TWO-TERMINAL CIRCUIT 失效
公开(公告)号：JPS6346010A
公开(公告)日：1988-02-26
申请号：JP19011186
申请日：1986-08-13
申请人： TOSHIBA CORP
发明人： ARAI JUNICHI , NORO YASUHIRO
IPC分类号： H03H11/46 , H03H11/40
摘要： PURPOSE:To simulate a non-linear characteristic of a voltage-a current in a high degree of approximation by a simple constitution, by constituting the titled circuit of a storage processing means for storing in advance a specific voltage-current non-linear characteristic, and outputting a current value signal from an analog/digital converter, and a digital/analog converter. CONSTITUTION:The titled circuit is constituted by providing an absolute value circuit 2 for deriving an absolute value of an input voltage, an analog/digital converter 3, a digital/analog converter 4, and a constantcurrent circuit 6 for suppling a current between two terminals. A curve of a desired voltage-current non-linear characteristic is divided minutely is advance and stored in a storage processing means 5, therefore, a voltage impressed between two terminals 10, 11 is detected through an operational amplifier 1 and the absolute value circuit 2, a current value to its detected voltage is read out of the storage processing means 5, and a current corresponding to its current value is supplied between the two terminals 10, 11 to which the voltage has been impressed, from the constant-current circuit 6. In this way, a non-linear characteristic of a voltage-a current can be simulated in a high degree of approximation by a simple constitution, without adding a circuit element such as a switch, a resistance, etc.

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