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1. 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

2. 发明专利

JPH04367011A METHOD AND DEVICE FOR POWER CONVERSION 失效
公开(公告)号：JPH04367011A
公开(公告)日：1992-12-18
申请号：JP14296791
申请日：1991-06-14
申请人： HITACHI LTD , TOKYO ELECTRIC POWER CO
发明人： KONISHI HIROO , KAWAZOE HIRONARI , KAWAKAMI JUNZO , NAKAMURA TOMOHARU , TOKIWA YUKIO , NAKAJIMA TATSUHITO
IPC分类号： G05F1/70 , H02J3/18 , H02M7/48
摘要： PURPOSE:To attain the method and a device for power conversion which can work stably and at a high speed as instructed without detecting the voltage phase of a system. CONSTITUTION:A power converter is provided with a means 430 which inputs the current and the voltage of the AC side of an inverter and obtains the instantaneous real power and the instantaneous imaginary power, and the means 414 and 418 which calculate both instantaneous real and imaginary power based on the level of the AC side voltage to obtain the real and imaginary currents and then calculate the signals showing the amplitude and the phase of the inverter based on the obtained real and imaginary currents. Thus it is possible to attain the method and the device which can work stably and at a high speed as instructed in a simple constitution without detecting the voltage phase of a system.

3. 发明专利

JPS60242720A SUPERVISORY CIRCUIT OF AUTOMATIC PULSE PHASE SHIFTER 失效
公开(公告)号：JPS60242720A
公开(公告)日：1985-12-02
申请号：JP9287984
申请日：1984-05-11
申请人： TOKYO ELECTRIC POWER CO , HITACHI LTD
发明人： SAKURAI BUICHI , HORIUCHI SUSUMU , NAKAMURA TOMOHARU , KAWAI TADAO
IPC分类号： H03K5/19
摘要： PURPOSE:To detect an error pulse mode due to a fault of an intermediate mode of a gate of a PLL circuit by providing a detection circuit detecting whether or not an input voltage of a voltage controlled oscillator is within a prescribed reference width in a phase locked loop (PLL) circuit. CONSTITUTION:The detection circuit 100 consists of an amplifier A1 amplifying a reference voltage Vr.f, an amplifier A2 outputting a voltage with different voltage value from the reference voltage, an amplifier A3 amplifying a prescribed reference voltage DELTAVt, amplifiers A4, A5, comparators A6, A7 comparing an input signal ef and a reference width DELTAVt and an inverse amplifier IV inverting the output. When the detected input signal et is within a prescribed width DELTAVt, an output V'out goes to a low level and goes to a high H level at an error and an error pulse mode is detected. Moreover, since the circuit contributes largely to the troubleshooting at maintenance, the repair time is reduced and also this circuit is effective to improve the system availability.

4. 发明专利

JPS5953036A Starting system for dc transmitting system 失效
公开(公告)号：JPS5953036A
公开(公告)日：1984-03-27
申请号：JP16231882
申请日：1982-09-20
申请人： Tokyo Electric Power Co , Hitachi Ltd
发明人： SAKURAI BUICHI , GOTOU KIYOSHI , NAKAMURA TOMOHARU , KAWAI TADAO
IPC分类号： H02J3/36 , H02J1/00
CPC分类号： Y02E60/60

5. 发明专利

JP2014045073A Troubleshooting method for photovoltaic power generating system 有权
标题翻译：光伏发电系统故障排除方法
公开(公告)号：JP2014045073A
公开(公告)日：2014-03-13
申请号：JP2012186501
申请日：2012-08-27
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
IPC分类号： H01L31/04
CPC分类号： G01R31/02 , H02S50/10
摘要： PROBLEM TO BE SOLVED: To provide a low-cost troubleshooting method without need of measurement means or communication means for a solar cell system.SOLUTION: The troubleshooting method comprises: calculation of the quantity of solar radiation while updating a predetermined coefficient J that a ratio of a short-circuit current to a working current according to a state of a solar cell array (8d); and calculation of a working temperature Tb and a fault number of solar cell modules in the solar cell array, using measurement data 8c including working currents and working voltages measured by a detecting section (8a, 8b).
摘要翻译：要解决的问题：提供一种低成本的故障排除方法，而不需要太阳能电池系统的测量手段或通信手段。解决方案：故障排除方法包括：在更新预定系数J时计算太阳辐射量，根据太阳能电池阵列（8d）的状态产生工作电流的短路电流; 以及使用包括由检测部（8a，8b）测量的工作电流和工作电压的测量数据8c，计算太阳能电池阵列中的太阳能电池模块的工作温度Tb和故障数量。

6. 发明专利

JPH06233461A REACTIVE POWER COMPENSATION DEVICE AND ITS CONTROLLER 失效
公开(公告)号：JPH06233461A
公开(公告)日：1994-08-19
申请号：JP14296691
申请日：1991-06-14
申请人： HITACHI LTD , TOKYO ELECTRIC POWER CO
发明人： KONISHI HIROO , KAWAZOE HIROSHIGE , NAKAMURA TOMOHARU , TOKIWA YUKIO , NAKAJIMA TATSUTO
IPC分类号： G05F1/70 , H02J3/18
摘要： PURPOSE:To quicken the response of control and prevent overcurrent during a fault by controlling the reactive power of a reactive power compensation device in accordance with the output signals of constant voltage control means and constant current control means. CONSTITUTION:This device comprises a constant voltage control circuit for keeping constant a DC voltage of an inverter 42 of a reactive power compensation device 4 (comprising an operation command circuit 401 of the reactive power compensation device, a DC voltage detecting circuit 402, an adding circuit 403 for determining the deviation of a detected DC voltage value from a voltage command value, and an operational amplifier 404) and a constant current control circuit for keeping constant a current which flows from the reactive power compensation device 4 to the system (comprising the operation command circuit 401, a polarity reversing circuit 408, an adding circuit for determining the deviation of a detected current value from the current command value, and an operational amplifier 410). And the reactive power of the reactive power compensation device 4 is controlled in accordance with the output signals of these control circuits. By doing this, the response of reactive power control can be quickened and the overcurrent during a fault can be prevented.

7. 发明专利

JPS60241776A CONTROL SYSTEM OF AC/DC CONVERSION FACILITY 失效
公开(公告)号：JPS60241776A
公开(公告)日：1985-11-30
申请号：JP9288684
申请日：1984-05-11
申请人： TOKYO ELECTRIC POWER CO , HITACHI LTD
发明人： ISHIKAWA MASAHIRO , GOTOU KIYOSHI , NAKAMURA TOMOHARU , KAWAI TADAO
IPC分类号： H02J1/00 , H02M1/08 , H02M7/12 , H02M7/155
摘要： PURPOSE:To suppress the heating of a control rectifier by reducing a DC current flowed to a DC system to the prescribed value or lower as compared with the value at the normal time when detecting the voltage drop of an AC system. CONSTITUTION:A forward conversion controller 5 has a constant power controller 10, a DC current set value transmission controller 11, a constant current controller (ACR) 12, a limiter 13, an automatic pulse phase shifter (APPS) 14, a pulse controller 15 and an insufficient voltage detector 16, and a signal from the detector 16 is supplied to the controller 11 and the APPS14. When the detector 16 is operated, a signal from high speed restart is output to the APPS14, and a set value decrease command is generated in the controller 11. Thus, the set value inputs of the ACR12 of the forward converter 3A and power inverter 3B sides are abruptly decreased.

8. 发明专利

JPS5953083A Commutation failure preventive device 失效
标题翻译：传感器故障预防装置
公开(公告)号：JPS5953083A
公开(公告)日：1984-03-27
申请号：JP16231282
申请日：1982-09-20
申请人： Hitachi Ltd , Tokyo Electric Power Co Inc:The
发明人： SAKURAI BUICHI , HORIUCHI SUSUMU , NAKAMURA TOMOHARU , KAWAI TADAO
IPC分类号： G05F1/10 , H02M1/00 , H02M7/12 , H02M7/155
CPC分类号： H02M7/155
摘要： PURPOSE:To rapidly and effectively detect the commutation failure by comparing the voltage waveform of previous time with the voltage waveform of this time in absolute values for each half cycle. CONSTITUTION:An AC voltage waveform which is detected by a transformer 1 is alterrately stored for each half cycle in memories 4a, 4b through an A/D converter 5. When the AC voltage waveform is positive half cycle at this time, a sign is not inverted, but stored as it is, while when it is negative half cycle, the sign is inverted by a sign converter 10 and stored. The absolute values of the voltage waveforms of the half cycle which are read out from the memories 4a, 4b are compared by a comparator 6, the compared result is applied to a distortion discriminator 7, thereby discriminating the presence or absence of distortion in the voltage waveform of an AC system.
摘要翻译：目的：通过将上一次的电压波形与该时间的电压波形进行比较，快速有效地检测换相故障，每个半周期的绝对值。构成：由变压器1检测的交流电压波形通过A / D转换器5在存储器4a，4b中每半个周期被不同地存储。当此时的交流电压波形为正半周期时，符号不是反转，但存储为原样，而当其为负半周期时，符号由符号转换器10反相并存储。从存储器4a，4b读出的半周期的电压波形的绝对值通过比较器6进行比较，比较结果被施加到失真鉴别器7，从而识别电压中存在或不存在失真交流系统的波形。

9. 发明专利

JPS5953025A Controller for dc transmission 失效
标题翻译：直流变速器控制器
公开(公告)号：JPS5953025A
公开(公告)日：1984-03-27
申请号：JP16231682
申请日：1982-09-20
申请人： Tokyo Electric Power Co , Hitachi Ltd
发明人： SAKURAI BUICHI , GOTOU KIYOSHI , TAMAI MAKOTO , NAKAMURA TOMOHARU
IPC分类号： H02J1/00

10. 发明专利

JPS5952913A Multiplex processing device of pulse circuit 失效
标题翻译：脉冲电路的多处理器件
公开(公告)号：JPS5952913A
公开(公告)日：1984-03-27
申请号：JP16231082
申请日：1982-09-20
申请人： Hitachi Ltd , Tokyo Electric Power Co Inc:The
发明人： SAKURAI BUICHI , HORIUCHI SUSUMU , NAKAMURA TOMOHARU , KAWAI TADAO
IPC分类号： H03K5/26 , H03K5/00 , H03K19/003 , H03K19/0175
CPC分类号： H03K5/00
摘要： PURPOSE:To obtain a multiplex processing device of a pulse circuit which requires no pulse converting circuit, by providing an AND gate group for receiving each output of N-pieces of pulse circuits by its one input terminal, and a selecting circuit for outputting an output approval signal to the other input terminal of the AND gate group at the point of time when the i-th (1
摘要翻译：目的：为了获得不需要脉冲转换电路的脉冲电路的多路复用处理装置，通过提供一个用于由其一个输入端接收N个脉冲电路的每个输出的与门组，以及用于输出输出的选择电路在这些脉冲输出中的第i（1 <= i <= Ni）个脉冲的时间点输出与门组的另一个输入端的许可信号。构成：在脉冲电路1A的输出PA比其他两个脉冲电路1B，1C的输出PB，PC输出的情况下，输出PA设定FFB为FFC，并且将这些触发器的输出保持为“ 通过打开AND门20B，20C。在该状态下，当从脉冲电路1B输出脉冲PB时，成为最终的输出PG。多路复用脉冲电路同时发生故障的概率极低，因此，输出第二脉冲为定时错误的脉冲的概率也很低。

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