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1. 发明专利

JPH08138927A SUPERCONDUCTIVE COIL QUENCH DETECTING DEVICE 失效
公开(公告)号：JPH08138927A
公开(公告)日：1996-05-31
申请号：JP26965994
申请日：1994-11-02
申请人： KANSAI ELECTRIC POWER CO , MITSUBISHI ELECTRIC CORP
发明人： KOIKE TATSURO , IZUMI TORU , KISHIDA TAKUYA , TOYODA KATSUYOSHI , MINATO TSUNEAKI , HARADA NAOYUKI , ICHIHARA SUNAO
IPC分类号： H01F6/02
摘要： PURPOSE: To obtain a superconductive coil quench detecting device which is less affected by magnetic noises so as to accurately detect a very low voltage induced with quench of a superconductive coil. CONSTITUTION: When a quench occurs in a superconductive coil 2 inside a vacuum thermally insulated vessel 3, a voltage is generated in the superconductive coil 2, but no voltage is generated in pickup coils 4a and 4b provided adjacent to the superconductive coil 2, a quench detector 5 judges that a quench occurs in the superconductive coil 2 basing on a voltage generated in the coil 2, a power supply 1 is shut off by a circuit breaker 9, and a protective resistor introducing switch 10 is turned on so as to make a discharge take place through a protective resistor 11. If magnetic noises are introduced from outside, a voltage generated in the superconductive coil 2 is canceled out with a voltage generated by the pickup coils 4a and 4b, so that a quench detector 5 is not actuated and protected against the effect of magnetic noises.

2. 发明专利

JPH0984252A SUPERCONDUCTING COIL QUENCH DETECTOR 失效
公开(公告)号：JPH0984252A
公开(公告)日：1997-03-28
申请号：JP23405395
申请日：1995-09-12
申请人： MITSUBISHI ELECTRIC CORP , KANSAI ELECTRIC POWER CO
发明人： TOYODA KATSUYOSHI , MORITA MASAO , KOIKE TATSURO , IZUMI TORU , KISHIDA TAKUYA
IPC分类号： G01R33/035 , H01F6/06 , H02H7/00
摘要： PROBLEM TO BE SOLVED: To provide a superconducting coil quench detector which can accurately detect a small voltage generated by a quench of a superconducting coil. SOLUTION: This equipment is provided with a first and a second voltage measuring amplifier 8a, 8b and a subtracter 9. To the first and the second voltage measuring amplifier 8a, 8b, a first and a second coil 7a, 7b are series connected. Voltage is intermittently applied to these coils 7a, 7b by a chopper circuit to excite the coils. While no voltage is applied to the coils, circulating current is allowed to flow in the coils by a circulating diode 4. The first and the second voltage measuring amplifier 8a, 8b measure the voltages across the coils 7a, 7b respectively. A difference between the voltages measured by the voltage measuring amplifiers 8a, 8b is found by a subtracter 9. This equipment is also provided with a counter 10 which detects the appearance of a quench in the coils 7a, 7b from the output of the subtracter 9 and with a signal generator 11. A first and a second voltage waveform generator 12a, 12b send out the voltages of the coils 7a, 7b to the voltage measuring amplifiers 8a, 8b after eliminating a part which is the same as or higher than a specified set value.

3. 发明专利

JP2001025160A CURRENT LIMITER 失效
公开(公告)号：JP2001025160A
公开(公告)日：2001-01-26
申请号：JP19168299
申请日：1999-07-06
申请人： KANSAI ELECTRIC POWER CO
发明人： KOIKE TATSURO , IZUMI TORU , ISE TOSHIFUMI , KUMAGAI SADATOSHI , NGUYEN FON NGUYEN , OKA HIROYOSHI
IPC分类号： H02H9/02
摘要： PROBLEM TO BE SOLVED: To restrain generation of accident outflow current from a power- generating system with a commercial system and a power generating system interlocking with each other at the time of some accident in the commercial system, by providing a rectifying type current limiter having a diode rectifying circuit part and a superconducting coil connected to the output side of the diode rectifying circuit part. SOLUTION: A rectifier type current limiter 1 is provided which includes a diode rectifying circuit part 11 and a superconducting coil 12 connected to the output side of the diode rectifying circuit part 11. The rectifier type current limiting device 1 causes the superconducting coil 12 to work as a current limiting inductor inserted in an interlocking line 3 interlocking a commercial system 4 and a power generating system 5 with each other, when current-limiting operation is performed by the rectifying type current limiter 1 of a current-limiting device. As a result, generation of accident outflow currents from the power generating system 5 with the commercial system and the power generating system 5 interlocked with each other, at occurrence of an accident in the commercial system 4.

4. 发明专利

JPH0251325A SIMULATION OF AUTOMATIC VOLTAGE REGULATOR FOR GENERATOR 失效
公开(公告)号：JPH0251325A
公开(公告)日：1990-02-21
申请号：JP20239988
申请日：1988-08-12
申请人： KANSAI ELECTRIC POWER CO
发明人： KOIKE TATSURO , NISHIMORI TOSHIRO
IPC分类号： H02J3/00 , H02P9/14
摘要： PURPOSE:To achieve highly accurate and stable control by applying the fixed reciprocal of the gain of an automatic voltage regulator, as an input signal, to the automatic voltage regulator. CONSTITUTION:Generator terminal voltage Vt is compared with a reference voltage Tt0 and the difference is detected at a detection block. The difference is provided, as a command, to an exciter 3 through an amplifier block 2. Consequently, output voltage Vt of a synchronous machine varies through a synchronous machine circuit block 5 and it is fed back to the detection block 1. Exciter voltage is fed back through a control circuit block 4 to the amplifier block 2, thus forming a minor loop. A fixed term block 6 provides the fixed terms of the reciprocals of the gains G1, G2, G3 of an automatic voltage regulator, as addition inputs, to the detection block 1. Offset is compensated by the addition inputs, thus ensuring that Vt will be equal to Vt0.

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