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1. 发明专利

JPS54140935A STARTING OF DCCTOOAC CONVERTER 失效
公开(公告)号：JPS54140935A
公开(公告)日：1979-11-01
申请号：JP4892478
申请日：1978-04-25
申请人： FUJI ELECTRIC CO LTD , DENRIYOKU CHUO KENKYUSHO
发明人： HAYASHI TOSHIYUKI , MACHIDA TAKEHIKO , HORIUCHI NOBUYUKI , YOKOGAWA SUMIO
IPC分类号： H02M7/515 , H02M7/757
摘要： PURPOSE:To perform the stable starting of a DC-to-AC converter while harmonizing a DC chopper with a separately-excited inverter, by operating the inverter in a power rectification range while keeping the chopper out of operation when the DC-to -AC converter is started. CONSTITUTION:The separately-excited inverter 4 is connected to AC power lines 2 through a tansformer 3. A DC reactor 5 is provided in a DC input circuit for the inverter. The DC chopper 6 is connected between a DC power source 1 and the DC input circuit and equipped with a flywheel diode 61. To start the DC-to-AC converter, the separately-excited inverter is operated first in the power rectification range to cause a current to flow from the AC power lines to the DC reactor through the inverter and the flywheel diode. When said current has exceeded a predetermined level, the DC chopper is started. The inverter is thereafter shifted into a power inversion range. The sure and stable starting of the DC-to-AC converter can thus be effected while the chopper and the inverter are harmonized with each other.

2. 发明专利

JPS54140934A STARTING OF DCCTOOAC CONVERTER 失效
公开(公告)号：JPS54140934A
公开(公告)日：1979-11-01
申请号：JP4892378
申请日：1978-04-25
申请人： FUJI ELECTRIC CO LTD , DENRIYOKU CHUO KENKYUSHO
发明人： HAYASHI TOSHIYUKI , MACHIDA TAKEHIKO , HORIUCHI NOBUYUKI , YOKOGAWA SUMIO
IPC分类号： H02M7/515
摘要： PURPOSE:To smoothly increase the current of a DC-to-AC converter when it is started, by connecting a resistor in series with a DC power source and by continously decreasing the resistance of the resistor after the energization of a separately- excited inverter is started. CONSTITUTION:An operation instruction unit 12 is provided to generate a signal to release an inverter control unit 7 from a pulse-off state and start the operation of the unit when the inverter is started. The unit 12 also generates a control signal to decrease the resistance of the resistor 6 through a controller 11 with the lapse of time. After the inverter is started, the resistance of the resistor is decreased in stages or continously so that a current command applied to a current regulator 8 acting on the phase control unit 7 for the separately-excited invertter rises later than the actual current level which rises with the decrease in the resistance of the resistor 6. The DC-to-AC converter can thus be started while th current is caused to rise in a desired smooth pattern even if the AC voltage of the inverter so selected that the reactive power taken by the inverter from AC power lines in rated operation is reduced.

3. 发明专利

JPS5426422A LOW REACTIVE POWER DEVICE FOR EXTERNAL COMMUTATED INVERTER 失效
公开(公告)号：JPS5426422A
公开(公告)日：1979-02-28
申请号：JP9187577
申请日：1977-07-29
申请人： FUJI ELECTRIC CO LTD , DENRIYOKU CHUO KENKYUSHO
发明人： MACHIDA TAKEHIKO , HAYASHI TOSHIYUKI , ANAHARA RIYOUJI , SUZUKI KANJI
IPC分类号： G05F1/70 , H02M7/48
摘要： PURPOSE:To reduce a required amount of reactive power from AC side during operation, by such means that with a transformer, having an AC voltage regulator like on-load tap changer, provided in the inverter, AC voltage at a valve terminal be regulated in accordance with a condition of DC power source voltage.

4. 发明专利

JPS54140933A EMERGENCY OPERATON OF SEPARATELYYEXCITED INVERTER 失效
公开(公告)号：JPS54140933A
公开(公告)日：1979-11-01
申请号：JP4892278
申请日：1978-04-25
申请人： FUJI ELECTRIC CO LTD , DENRIYOKU CHUO KENKYUSHO
发明人： HAYASHI TOSHIYUKI , MACHIDA TAKEHIKO , HORIUCHI NOBUYUKI , YOKOGAWA SUMIO
IPC分类号： H02M3/315 , H02M7/515
摘要： PURPOSE:To continue the operation of a separately-excited inverter, by temporarily advancement angle when the failure in the commutation of the inverter is detected. coupling current-limiting resistors to an inverter DC circuit and increasing the advancement angle when the failure in the commutation of the inverter is detected. CONSTITUTION:When the commutation of the inverter 4 fails at a time to, the inverter suffers from DC short-circuit and its DC voltage E1N drops to zero but the current Id increases. An emergency operation instruction unit 12 detects the failure in the commutation of the inverter to apply an auxiliary input signal to a current regulator 8 and apply a resistor connecting instruction to a controller 11. The controller opens short-circuit switches S1-S3 in accordance with the instruction from the instruction unit 12 to couple the resistors R1-R3 to the inverter DC circuit to limit the current below an allowable level. The inverter is then operated with a controlled advance angle of 90 deg. by the current regulator 8 and put in such a state that the self-restoring capacity of the inverter against the failure in the commutation is raised. When the cause of the failure in the commutation is eleminated, the inverter is restored to normal commutation at a time t4, for example. Therefore, the separately-excited inverter can be restored to normal operation without the useless stoppage of the operation of the inverter.

5. 发明专利

JPS5426421A REACTIVE POWER CONTROL SYSTEM FOR EXTERNAL COMMUTATED INVERTER 失效
公开(公告)号：JPS5426421A
公开(公告)日：1979-02-28
申请号：JP9187477
申请日：1977-07-29
申请人： FUJI ELECTRIC CO LTD , DENRIYOKU CHUO KENKYUSHO
发明人： MACHIDA TAKEHIKO , HAYASHI TOSHIYUKI , ANAHARA RIYOUJI , SUZUKI KANJI
IPC分类号： G05F1/70 , H02M7/48 , H02M7/515
摘要： PURPOSE:To suppress a reactive power, taken out from AC side during operation, to a prescribed level, by such means that with an AC voltage regulator, like on-load tap changer, provided in an inverter transformer, an AC voltage at valve terminal be regulated in accordance with a condition of DC power source voltage.

6. 发明专利

JPS57202836A METHOD OF STARTING AND STOPPING DC SINGLE TRANSMISSION SYSTEM 失效
公开(公告)号：JPS57202836A
公开(公告)日：1982-12-11
申请号：JP8570881
申请日：1981-06-05
申请人： DENRIYOKU CHUO KENKYUSHO , HITACHI LTD
发明人： MACHIDA TAKEHIKO , YOSHIDA YUKIO , HAYASHI TOSHIYUKI , KONISHI HIROO
IPC分类号： H02J1/00

7. 发明专利

JPS60257725A VOLTAGE CONTROLLER OF DC TRANSMISSION SYSTEM 失效
公开(公告)号：JPS60257725A
公开(公告)日：1985-12-19
申请号：JP11154484
申请日：1984-05-31
申请人： DENRIYOKU CHUO KENKYUSHO , HITACHI LTD
发明人： YOSHIDA YUKIO , HAYASHI TOSHIYUKI , YOSHIZUMI TATSUNORI , KAWAI TADAO
IPC分类号： H02J3/36

8. 发明专利

JPS59162728A Control system of self-excited power converter 失效
标题翻译：自励功率转换器控制系统
公开(公告)号：JPS59162728A
公开(公告)日：1984-09-13
申请号：JP3557683
申请日：1983-03-04
申请人： Denriyoku Chuo Kenkyusho , Toshiba Kk
发明人： TAKEDA YUKIHIRO , HAYASHI TOSHIYUKI , OGAWA KIYOSHI
IPC分类号： H02J3/38 , H02H7/122 , H02J3/50 , H02M7/48

9. 发明专利

JPS59204427A Control system for generator and dc system 失效
标题翻译：发电机和直流系统控制系统
公开(公告)号：JPS59204427A
公开(公告)日：1984-11-19
申请号：JP7749983
申请日：1983-05-04
申请人： Denriyoku Chuo Kenkyusho , Hitachi Ltd
发明人： YOSHIDA YUKIO , HAYASHI TOSHIYUKI , ICHIKAWA TATSUMI , KONISHI HIROO , ISONO AKIRA
IPC分类号： H02J3/36
CPC分类号： Y02E60/60

10. 发明专利

JPS5833926A METHOD OF STARTING DC TRANSMISSION SYSTEM 失效
公开(公告)号：JPS5833926A
公开(公告)日：1983-02-28
申请号：JP13099481
申请日：1981-08-20
申请人： DENRIYOKU CHUO KENKYUSHO , HITACHI LTD
发明人： YOSHIDA YUKIO , HAYASHI TOSHIYUKI , KONISHI HIROO , SHIRAHAMA HIDEFUMI
IPC分类号： H02J1/00 , H02J3/36 , H02M7/48

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