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1. 发明专利

JPH04208074A AC/DC CONVERTER 失效
公开(公告)号：JPH04208074A
公开(公告)日：1992-07-29
申请号：JP33938990
申请日：1990-11-30
申请人： HITACHI LTD , TOKYO ELECTRIC POWER CO
发明人： TANAKA CHIKARA , TOKIWA YUKIO , MIYAZAKI SATOSHI
IPC分类号： H02M7/06 , G05F1/10 , H02M7/12 , H02M7/155
摘要： PURPOSE:To improve reliability and to enable downsizing by disposing a series circuit of a thyristor with an overvoltage self-protecting function and a resistor in parallel with a smoothing capacitor, and providing a circuit for opening a changeover switch by detecting firing of a VBO free thyristor. CONSTITUTION:If a DC side voltage of an AC/DC converter 3 becomes abnormally high, when a forward voltage between terminals of a VBO free thyristor 5 exceeds an overvoltage self-protecting level, it is fired by an overvoltage. A discharging current of a smoothing capacitor 2 flows from the capacitor 2 through the thyristor 5 and a resistor 6 by firing, the DC voltage of the converter 3 is lowered, and damage due to an overvoltage can be prevented. A current flowing by firing is detected by a current detector 8, and a detection signal is sent to a switch controller 7. The controller 7 opens a changeover switch 4 if the detected current value becomes a predetermined value or more.

2. 发明专利

JPH02164231A AC TO DC CONVERTER 失效
公开(公告)号：JPH02164231A
公开(公告)日：1990-06-25
申请号：JP31641088
申请日：1988-12-16
申请人： HITACHI LTD , TOKYO ELECTRIC POWER CO
发明人： TANAKA CHIKARA , TOKIWA YUKIO , MIYAZAKI SATOSHI
IPC分类号： H02H3/00 , H02J1/00 , H02J5/00 , H02M7/12 , H02M7/155
摘要： PURPOSE:To improve the reliability of an apparatus by arranging a DC switch between a voltage type self-excited converter and a smoothing capacitor or said smoothing capacitor between the voltage type self-excited converter and DC switch or by using the arrangements at the same time. CONSTITUTION:When a short-circuit or ground fault occurs on the DC side, a short-circuit detector 12 or an earth detector 10 detects the fault so that an OFF signal is given from a gate control circuit 13 to a DC switch and the DC switch 4 is brought to an OFF state to cut OFF an overcurrent flowing through an AC to DC converter 1. In this manner, the overcurrent ceases to flow through the AC to DC converter 1 over a long period of time and the breakdown of the AC to DC converter 1 by the over-current can be prevented beforehand. Also, it is possible to prevent the discharge of the smoothing capacitor 3 so that an apparatus can be restarted even at high speed without recharging the smoothing capacitor.

3. 发明专利

JPH02164283A SELF-EXCITED AC/DC CONVERTER SYSTEM 失效
公开(公告)号：JPH02164283A
公开(公告)日：1990-06-25
申请号：JP31640788
申请日：1988-12-16
申请人： TOKYO ELECTRIC POWER CO , HITACHI LTD
发明人： TOKIWA YUKIO , MIYAZAKI SATOSHI , KAWAI TADAO
IPC分类号： H02M7/155 , H02M7/521 , H02M7/757
摘要： PURPOSE:To omit a converting transformer and to obtain an inexpensive AC/DC converter system by grounding the intermediate point of a DC capacitor. CONSTITUTION:A thyristor bulb 1 for composing a self-excited converter, a DC capacitor 4 connected in parallel with the thyristor bulb 1, and a DC reactor 3 are connected, and directly connected to an AC system through a breaker 6 and an AC filter 5 without a converting transformer. In this case, the intermediate point of the DC capacitor 4 is not grounded.

4. 发明专利

JPH02159968A ELECTROSTATIC INDUCTION THYRISTOR SWITCH 失效
公开(公告)号：JPH02159968A
公开(公告)日：1990-06-20
申请号：JP31202288
申请日：1988-12-12
申请人： HITACHI LTD , TOKYO ELECTRIC POWER CO
发明人： TANAKA CHIKARA , TOKIWA YUKIO , MIYAZAKI SATOSHI
IPC分类号： H02M1/092
摘要： PURPOSE:To make a smaller insulating transformer by performing initial charge of a plurality of gate circuits one after another with an initial charge power source and then separating the gate circuits from each other and the gate circuits from the initial charge power source. CONSTITUTION:A gate circuit 3.1 is charged with an initial charge power source 7 and then, when the gate circuit 3.1 is charged, a gate circuit 3.2 on the following stage is charged. When all the gate circuits 3.1-3.n are charged by repeating these processes, signals are sent from the gate circuits 3.1-3.n to a gate control circuit 8 and stop the initial charge power source 7 and voltage is applied between the terminals A and K of a main circuit. After applying voltage to the main circuit, the power for the gate circuits 3.1-3.n are supplied from the main circuit to enable operating electrostatic induction thyristors 1.1-1.n with the gate control circuit 8 without using the initial charge power source 7. Thereby a smaller insulating transformer can be made.

5. 发明专利

JP2013055132A Method of fault diagnosis of photovoltaic power generation system 有权
标题翻译：光伏发电系统故障诊断方法
公开(公告)号：JP2013055132A
公开(公告)日：2013-03-21
申请号：JP2011190789
申请日：2011-09-01
申请人： Hitachi Ltd , 株式会社日立製作所 , Tokyo Electric Power Co Inc:The , 東京電力株式会社
发明人： KONO TORU , NAKAMURA AKIHIRO , NAKAMURA TOMOHARU , MORIKAWA HIROKI , MIYAZAKI SATOSHI , SUZUKI KENICHI
IPC分类号： H01L31/04 , G01R31/02
CPC分类号： Y02E10/50
摘要： PROBLEM TO BE SOLVED: To provide a fault diagnosis method which does not require time or work without adding excess measuring means or communication means in a photovoltaic power generation system.SOLUTION: A fault diagnosis method calculates first working voltage and first working current (S102) of a solar cell array at normal temperature under a measured amount of solar radiation pb, calculates working temperature Tb of the solar cell array (S103) with the use of the first working voltage and measured second working voltage, calculates third working current (S104) at normal temperature with the use of measured second working current and the working temperature Tb, compares the first working current with the third working current (S106), and calculates the number of solar cell modules having a disconnected wire in the solar cell array based on the comparison result.
摘要翻译：要解决的问题：提供不需要时间或工作的故障诊断方法，而不在太阳能发电系统中增加多余的测量装置或通信装置。解决方案：故障诊断方法在测量的太阳辐射pb下，在常温下计算太阳能电池阵列的第一工作电压和第一工作电流（S102），用太阳能电池阵列（S103）的工作温度Tb计算使用第一工作电压和测量的第二工作电压，使用测量的第二工作电流和工作温度Tb在常温下计算第三工作电流（S104），将第一工作电流与第三工作电流进行比较（S106），并根据比较结果计算太阳能电池阵列中具有断线的太阳能电池模块的数量。版权所有（C）2013，JPO＆INPIT

6. 发明专利

JPH02164230A DC POWER TRANSMISSION SYSTEM 失效
公开(公告)号：JPH02164230A
公开(公告)日：1990-06-25
申请号：JP31640988
申请日：1988-12-16
申请人： TOKYO ELECTRIC POWER CO , HITACHI LTD
发明人： TOKIWA YUKIO , MIYAZAKI SATOSHI , YOSHIZUMI TATSUNORI , KAWAI TADAO
IPC分类号： H02J1/00 , H02M7/12 , H02M7/17 , H02P9/00
摘要： PURPOSE:To obtain the interconnected transmission system of a pumped storage power station making a large remodeling unnecessary and solving the problem of stability by providing a self-excited converter instead of a separately excited converter and by controlling the output frequency of the self-excited converter. CONSTITUTION:At the time of starting an apparatus, a converter 5 is operated, a DC transmission line 4 is charged with electricity, and the DC side voltage of a self-excited converter 3 is set to a rated value. Then, the self-excited converter 3 is started at a low frequency and with a low voltage output. The synchronous generator of a pumped storage power station starts rotation by the output voltage. The frequency and output voltage of the self-excited generator 3 is gradually made higher so that the number of revolutions of the generator is raised, and pumping is started with suitable timing. Thereafter, a pump discharge rate of flow can be arbitrarily controlled according to the set value Pref of a conversion power. Thus, it is possible to eliminate large remodeling of a generator-motor and to operate a stable pumped-storage power station.

7. 发明专利

JPH02164229A DC POWER TRANSMISSION SYSTEM 失效
公开(公告)号：JPH02164229A
公开(公告)日：1990-06-25
申请号：JP31640888
申请日：1988-12-16
申请人： TOKYO ELECTRIC POWER CO , HITACHI LTD
发明人： TOKIWA YUKIO , MIYAZAKI SATOSHI , KAWAI TADAO
IPC分类号： H02J1/00
摘要： PURPOSE:To obtain a DC transmission system capable of operating multiple terminals stably by closing divided capacitors in the manner of causing no large disturbance, at the time of dividing a DC capacitor, providing respective capacitors with a switch and providing a parallel connection of the capacitors in the DC system in operation. CONSTITUTION:When a conversion office C is connected with the DC transmission system between conversion offices A, B in operation, a switch 4 is closed first to charge the conversion office C with electricity and thereafter switches 7-9 are closed successively. In a DC capacitor 6 at that time, because a rush current by closing takes a sufficiently small value so as not to influence the operation of the conversion offices A, B, the established operation system is not disturbed even if capacitors are successively charged with electricity by closing of said switches 7-9. Thus, it is easily realizable to provide the parallel connection of multiple terminals in a self-excited converter with a high capacity DC capacitor and to operate the terminals by the converter.

8. 发明专利

JP2012063821A Trading charge calculation system 审中-公开
标题翻译：交易费计算系统
公开(公告)号：JP2012063821A
公开(公告)日：2012-03-29
申请号：JP2010205274
申请日：2010-09-14
申请人： Tokyo Electric Power Co Inc:The , 東京電力株式会社
发明人： MIYAZAKI SATOSHI , SUGANO JUNYA
IPC分类号： G06Q50/06 , G01R11/56 , H02J3/00 , H02J3/38
CPC分类号： Y04S50/10
摘要： PROBLEM TO BE SOLVED: To provide a trading charge calculation system capable of calculating charges of power having different unit prices between buying and selling the power by using a power meter in common.SOLUTION: A system includes: selling power source determination means 27 of a charge calculation device 26 for determining a source of selling power when the selling power is supplied to a power system from a user; selling power charge calculation means 28 for calculating a selling charge with different selling power unit price of selling power measured by a selling power meter 19 between when the source of the selling power determined by the selling power source determination means 27 is only a distributed power facility and when a secondary battery 13 is included; and buying power charge calculation means 29 for calculating a buying power charge with a predefined buying power unit price on the basis of buying power measured by a buying power meter 20 when the buying power is supplied to the user from a power system 18.
摘要翻译：要解决的问题：提供一种交易费用计算系统，其能够通过使用共同的功率计来计算购买和销售电力之间的具有不同单位价格的电力的费用。解决方案：系统包括：销售计费装置26的电源确定装置27，用于当从用户向电力系统提供销售电力时，确定销售电源; 销售电力计费单元28，用于计算由销售功率计19测定的销售功率的不同销售功率单位价格的销售费用，在销售电力确定装置27确定的销售电力源仅仅是分布式电力设备并且当包括二次电池13时; 以及购买电力计费装置29，用于基于购买功率计20测量的购买功率，以购买力从电力系统18向用户提供时，以预定的购买力单位价格计算购买力。 >版权所有（C）2012，JPO＆INPIT

9. 发明专利

JP2012016149A Photovoltaic power generation device 审中-公开
标题翻译：光伏发电装置
公开(公告)号：JP2012016149A
公开(公告)日：2012-01-19
申请号：JP2010149298
申请日：2010-06-30
申请人： Tokyo Electric Power Co Inc:The , 東京電力株式会社
发明人： MIYAZAKI SATOSHI , SUGANO JUNYA
IPC分类号： H02J7/35 , H01L31/04 , H01M10/44
CPC分类号： Y02E10/58
摘要： PROBLEM TO BE SOLVED: To provide a photovoltaic power generation device capable of efficiently selecting a secondary battery so as to maximize a generating capability of a solar battery and performing a charging/discharging operation so as to equalize a charging depth of the secondary battery.SOLUTION: A solar battery operating voltage decision unit 18 determines whether an operating voltage of a solar battery 11 by a maximum power point tracking control is in a middle range of voltages of the rated voltages of two secondary batteries 12 or not when a charging/discharging control for the secondary battery 12 is required during the maximum power point tracking control. A first secondary battery selection unit 19 selects the one secondary battery of which the rated voltage is closer to the operating voltage of the solar battery 11 when the operating voltage is determined to be out of the middle range of voltages. A second secondary battery selection unit 20 selects the one secondary battery 12 of which an output power is higher when the solar battery is operated by the maximum power point tracking control unit 23, when the operating voltage is determined to be in the middle range of voltages. A secondary battery connection unit 22 connects the selected secondary battery 12 with the solar battery 11 of a direct current system 14 in parallel by a switching circuit 13.
摘要翻译：解决的问题：提供一种能够有效地选择二次电池以便最大化太阳能电池的发电能力并执行充电/放电操作的光伏发电装置，以使二次电池的充电深度相等电池。解决方案：太阳能电池工作电压判定单元18通过最大功率点跟踪控制确定太阳能电池11的工作电压是否处于两个二次电池12的额定电压的中间电压范围内在最大功率点跟踪控制期间需要二次电池12的充电/放电控制。第一二次电池选择单元19当确定工作电压处于中间的电压范围内时，选择额定电压接近太阳能电池11的工作电压的一个二次电池。第二二次电池选择单元20当确定太阳能电池处于中间电压范围时，选择太阳能电池由最大功率点跟踪控制单元23操作时输出功率较高的一个二次电池12 。二次电池连接单元22通过开关电路13将所选择的二次电池12与直流系统14的太阳能电池11并联连接。（C）2012年，JPO和INPIT

10. 发明专利

JP2011167014A Device for control of converter 审中-公开
标题翻译：转换器控制装置
公开(公告)号：JP2011167014A
公开(公告)日：2011-08-25
申请号：JP2010029241
申请日：2010-02-12
申请人： Tokyo Electric Power Co Inc:The , 東京電力株式会社
发明人： MIYAZAKI SATOSHI , SUGANO JUNYA
IPC分类号： H02J3/38 , H02M7/48
CPC分类号： Y02E10/563
摘要： PROBLEM TO BE SOLVED: To provide a device for control of a converter for use in controlling a frequency of a power system for linking distributed power supplies. SOLUTION: When a system frequency detected by a frequency detector exceeds a frequency threshold, control for increasing a switching frequency of a converter is performed. When the system frequency is below the frequency threshold, control for decreasing the switching frequency of the converter is performed. COPYRIGHT: (C)2011,JPO&INPIT

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