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11. 发明专利

JPH0217863A INVERTER CURRENT CONTROL SYSTEM 失效
公开(公告)号：JPH0217863A
公开(公告)日：1990-01-22
申请号：JP16447488
申请日：1988-06-30
申请人： NISSIN ELECTRIC CO LTD
发明人： TADA TOMOSHI
IPC分类号： H02J3/46 , H02M7/48
摘要： PURPOSE:To accurately control an output current by multiplying the differentiated signal of the output current set signal of an inverter by a coefficient of an interlocking reactor or the like, and modulating a pulse width modulation signal made of the sum of this signal and a system voltage correspondence signal. CONSTITUTION:An inverter current control system is composed in a system for controlling the output current I0 of a voltage type inverter 3 which injects an arbitrary current through an interlocking reactor 2 to a power system 1. The differentiated signal of its current set signal iOR is multiplied by a coefficient K1 equal to the inductance value L of the reactor 2, a pulse width modulation signal VIR made of the sum of this signal and a system voltage correspondence signal Vs is pulsewidth-modulated, and the switching element of the inverter 3 is controlled ON, OFF in response to the obtained pulse width modulation signal VQ. Thus, the output current I0 of the inverter 3 can be accurately controlled to a target value IOR, and stably operated.

12. 发明专利

JPH01318969A APPARATUS FOR DETECTING HIGHER-HARMONIC-WAVE CURRENT 失效
公开(公告)号：JPH01318969A
公开(公告)日：1989-12-25
申请号：JP15265488
申请日：1988-06-21
申请人： NISSIN ELECTRIC CO LTD
发明人： OGIWARA YOSHIYA , MATSUKAWA MITSURU , TADA TOMOSHI
IPC分类号： G01R23/20 , G01R19/00
摘要： PURPOSE:To detect the higher harmonic component in a current flowing to a higher- harmonic-wave generating load accurately without errors by using the sine wave signal of orthogonal two-phase system fundamental frequency which is synchronized with the system voltage of a power system as a reference for coordinate conversion. CONSTITUTION:A sine wave signal U2 of a two-phase fundamental frequency is used as a reference, and a two-phase load-current matching signal I2 undergoes coordinate conversion with a coordinate converting circuit 7. Then, the system fundamental frequency component becomes a DC component. The DC components are removed from the individual phase components IC and ID of the two-phase load-current matching signal I2, which is outputted from said coordination converting circuit 7, in first and second bypass filters 8 and 9. Thus, the AC components are extracted. The sine wave signal U2 is used as a reference for the two-phase fundamental frequency, and the individual phase components ICA and IDA of a two-phase higher-harmonic-wave current matching signal I2A which are the outputs of the filters 8 and 9 are reversely converted into the original coordinate system. The two-phase higher-harmonic-wave matching signal I2A, which is the output of the reverse conversion, is converted into a three-phase higher-hamonic-wave current matching signal I3A through a two-phase/three-phase converter circuit 11.

13. 发明专利

JPS63314144A SERIES CONNECTED TYPE VOLTAGE VARIATION COMPENSATING DEVICE 失效
公开(公告)号：JPS63314144A
公开(公告)日：1988-12-22
申请号：JP15073087
申请日：1987-06-16
申请人： NISSIN ELECTRIC CO LTD
发明人： TADA TOMOSHI
IPC分类号： H02J9/06 , G05F1/10
摘要： PURPOSE:To enable adding a certain voltage to a load stably, even if a large voltage variation is generated in an electric power system, by connecting first and second compensating power sources into a feeder route via a coupling transformer. CONSTITUTION:Secondary windings of first and second coupling transformers 3, 4 are inserted in series into a feeder route from an electric power system 1 to a load 2. A first compensating power source 5 with a small capacity is connected with the primary winding of said first coupling transformer 3 while a second compensating power source 6 with a large capacity is connected with the primary winding of said second coupling transformer 4. A voltage variation of the electric power system 1 less than a given percent of the normal voltage of said system 1 is compensated by said first compensating power source 5 alone and that exceeding said given percent is compensated by said second compensating power source 6 in cooperation with the first compensating power source 5.

14. 发明专利

JP2003284245A Interconnection system 审中-公开
标题翻译：互连系统
公开(公告)号：JP2003284245A
公开(公告)日：2003-10-03
申请号：JP2002076253
申请日：2002-03-19
申请人： Nissin Electric Co Ltd , 日新電機株式会社
发明人： TADA TOMOSHI , KAWAKAMI NORIKAZU
IPC分类号： H02J3/38
摘要： PROBLEM TO BE SOLVED: To exactly detect a single operation among photovoltaic generation units at the interruption of a system, in an interconnection system parallel- connected to a plurality of photovoltaic generation units. SOLUTION: The interconnection system comprises the plurality of photovoltaic units 1a to 1c and interconnection units 8a to 8c that link the photovoltaic generation units 1a to 1c to a system current 3, and can detect the single operation among the photovoltaic generation units 1a to 1c, by injecting inter-order harmonic currents to the system from injection units 7a to 7c of the interconnection units 8a to 8c. The system also comprises a control circuit 6 that imparts, to the interconnection units 8a to 8c, synchronous signals that synchronize phases of the inter-order harmonic currents outputted from the injection units 7a to 7c of the interconnection units 8a to 8c between and among the interconnection units 8a to 8c. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：在并联连接到多个光伏发电单元的互连系统中，在系统中断时精确地检测光伏发电单元之间的单个操作。解决方案：互连系统包括将光伏发电单元1a至1c连接到系统电流3的多个光伏单元1a至1c和互连单元8a至8c，并且可以检测光伏发电单元1a之间的单个操作到1c，通过从互连单元8a至8c的注入单元7a至7c向系统注入次序谐波电流。该系统还包括控制电路6，其向互连单元8a至8c施加同步信号，该同步信号使从互连单元8a至8c的注入单元7a至8c输出的有序谐波电流的相位同步互连单元8a至8c。版权所有（C）2004，JPO

15. 发明专利

JP2002118969A DISTRIBUTED POWER SUPPLY SYSTEM 失效
公开(公告)号：JP2002118969A
公开(公告)日：2002-04-19
申请号：JP2000303920
申请日：2000-10-03
申请人： NISSIN ELECTRIC CO LTD
发明人： TADA TOMOSHI
IPC分类号： H02J7/34 , G05F1/70 , H02J3/32 , H02J3/38
摘要： PROBLEM TO BE SOLVED: To provide a distributed power supply system which can cope with the shortage of power of a distributed power supply, without having to purchase power from utility and can prevent deterioration of the power factor. SOLUTION: In this distributed power supply system, a large capacity distributed power supply 1 is linked with a commercial power supply 2, power generated by the distributed power supply 1 is supplied to a load 5, and a reverse power flow generated by the distributed power supply 1 is sold. A power storage device 8, which compensates for excessive power when the load power exceeds the generated power of the distributed power supply 1, is provided between the distributed power supply 1 and the load 5. The power storage device 8 has the function of compensating for a reactive power component of the commercial power of the commercial power supply 2, when the reverse power flow generated by the distributed power supply 1 is reduced. The main circuit of the power storage device 8 comprises a power converter 6, connected between the distributed power supply 1 and the load 5 and secondary battery 7, which is chargeable and dischargeable and provided on the DC side of the power converter 6.

16. 发明专利

JP2001327082A POWER STORAGE SYSTEM 失效
公开(公告)号：JP2001327082A
公开(公告)日：2001-11-22
申请号：JP2000145087
申请日：2000-05-17
申请人： NISSIN ELECTRIC CO LTD
发明人： TADA TOMOSHI
IPC分类号： H02J3/32 , H02J3/38
摘要： PROBLEM TO BE SOLVED: To provide a power storage system which does not require a system linkage protective function in technical aspects and can simplify installation procedures and management job in operational aspects. SOLUTION: In the power storage system 11 for leveling electrical power by providing a secondary battery 17 to the DC side of a power converter 16, connected between a system power supply 12 and a load 13 via a linkage transformer 15 and by reducing the peak power via the supply of a discharge power to the load 13, by discharging the power stored in the secondary battery 17 to the system, a thyristor switch 20 is provided to a linkage point A of the system power supply 12 and power converter 16, in order to disconnect the power converter 16 from the system at discharging of the secondary battery 17.

17. 发明专利

JP2000006693A METHOD AND DEVICE FOR REGULATING FEEDER VOLTAGE 失效
公开(公告)号：JP2000006693A
公开(公告)日：2000-01-11
申请号：JP17339898
申请日：1998-06-19
申请人： NISSIN ELECTRIC CO LTD
发明人： TADA TOMOSHI
IPC分类号： B60M3/02 , B60L9/12
摘要： PROBLEM TO BE SOLVED: To suppress the voltage fluctuation at the end of a feeder line by a simple means. SOLUTION: In a method to regulate the voltage at the end of a feeder line 3 to compensate the voltage fluctuation at the end of the feeder line 3 by a link converter 13 connected to the end of the feeder line 3 of an AC electric railway through a link transformer 12, a battery 14 and a DC capacitor 15 are connected to the DC side of the link converter 13 in parallel, the long- term fluctuation of the effective power is compensated by the battery 14, and the short-term fluctuation of the effective power is compensated by a DC capacitor 15.

18. 发明专利

JPH11150869A CONTROL METHOD FOR BATTERY POWER EQUIPMENT 失效
公开(公告)号：JPH11150869A
公开(公告)日：1999-06-02
申请号：JP31181997
申请日：1997-11-13
申请人： NISSIN ELECTRIC CO LTD
发明人： TADA TOMOSHI
IPC分类号： H02J3/32 , H02J3/46 , H02M7/48
摘要： PROBLEM TO BE SOLVED: To make it possible to prevent capacity increase for a PWM inverter and reduce inverter loss by the variable control of the conducting angle of a square wave inverter in response to the DC voltage of a secondary current or the fluctuation in system voltage and adjusting in such a manner that the base voltage becomes always the same as the system voltage. SOLUTION: A control section 11 inputs a DC voltage Ed and a system voltage Vs, outputs a gate pulse signal Sg of a switching element of a square wave inverter in response to their fluctuations, and performs a variable control for the conducting angle θ of a square wave inverter. And adjustment is made to make the base voltage (effective value of fundamental wave component) Vb always the same as system voltage (effective value) Vs. Then, an increase in a voltage difference Vy between added value Vx and the system voltage Vs is restricted, and the increase in capacity of PWM inverter required for its correction is also restricted in the fundamental wave component. By doing this, the capacitor of the PWN inverter can be reduced independently from DC voltage or system voltage and the inverter loss can be considerably reduced.

19. 发明专利

JPH1191415A ELECTRIC RAILWAY DC TRANSFORMING SYSTEM 失效
公开(公告)号：JPH1191415A
公开(公告)日：1999-04-06
申请号：JP17019098
申请日：1998-06-17
申请人： NISSIN ELECTRIC CO LTD
发明人： URANO SHINICHI , TADA TOMOSHI , IINUMA TAKEHIKO
IPC分类号： B60M3/06
摘要： PROBLEM TO BE SOLVED: To effectively use its regenerative electric power without consuming surplus regenerative electric power generated in its electric railway load when an electric power regenerative brake in the electric railway load is used. SOLUTION: In an electric railway DC transforming system arranged in a transforming station to supply DC electric power to an electric railway load through a rectifier 2 from an AC power source 1, a secondary battery 6 is connected to the DC side of the rectifier through an electric current control circuit 5, and regenerative electric power generated in the electric railway load by charge-discharge of its secondary battery 6 is stored, and electric power of the rectifier 2 is smoothed.

20. 发明专利

JPH08223944A APPARATUS AND METHOD FOR CONTROL OF INVERTER 失效
公开(公告)号：JPH08223944A
公开(公告)日：1996-08-30
申请号：JP2895595
申请日：1995-02-17
申请人： NISSIN ELECTRIC CO LTD
发明人： TADA TOMOSHI
IPC分类号： H02M7/48 , H02M7/537 , H02M7/5387
摘要： PURPOSE: To control an inverter by a simple and easy means in such a way that a DC component flowing to the AC output side of an inverter can be suppressed even when a biased excitation phenomenon is generated. CONSTITUTION: In a single phase square-wave inverter 2, a plurality of switching elements U, V, X, Y are constituted as a bridge, and a direct current from a DC power supply 1 is converted into an alternating current by the ON-OFF operation of the switching elements U, V, X, Y. A control apparatus 7 controls the ON-OFF operation of the respective switching elements U, V, X, Y. Then, the control apparatus is provided with a synchronizing-signal generation part which generates synchronizing triangular-wave signals Cu, Cv used to set a continuity angle for the respective switching elements U, V, X, Y, with a correction-amount arithmetic part which computes a correction amount ΔK used to suppress a DC component by a biased excitation operation and with a gate-signal generation part which generates gate signals Gu', Gv', Gx', Gy' by adding or subtracting the correction amount ΔK to or from the synchronizing triangular-wave signals Cu, Cv.

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