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1. 发明专利

JPS6149663A Controller of power converter 失效
标题翻译：电源转换器控制器
公开(公告)号：JPS6149663A
公开(公告)日：1986-03-11
申请号：JP17042084
申请日：1984-08-17
申请人： Hitachi Ltd , Japanese National Railways
发明人： IKEDA HARUO , IWAWAKI SADAYUKI , ISAKA MASAYOSHI , NAKAMURA KIYOSHI , SHIMA KIYOYA , MIYAZAKI KOICHI , NAKAMURA TOMOHARU
IPC分类号： H02M5/27
CPC分类号： H02M5/27
摘要： PURPOSE:To remove the side wave near a power frequency by connecting an another converter with the same AC power source as a power converter, and controlling the converter with a signal representing the side wave generated by the converter as a command value. CONSTITUTION:In a device for supplying a power to a load by connecting a power converter CCU connected in anti-parallel with positive and negative side converters SSp, SSN with an AC power source SS, an another converter CN is connected with the power source SS. The converter CN is controlled by a signal representing a side wave generated from the converter CCU as a current command. To this end, the sum of a circulating current command value Icp and a DC command 2 is calculated by an adder 4, and the value produced by subtracting the output by a subtractor 5 by the rectified and amplified output of the AC input current Is is used as a current command value to control the converter CN.
摘要翻译：目的：为了通过将另一个转换器与功率转换器相同的交流电源连接起来，去掉电力频率附近的侧波，并且用转换器产生的表示侧面波的信号作为指令值来控制转换器。构成：在通过将与正负侧转换器SSp，SSN与AC电源SS反并联连接的电力转换器CCU连接到负载来供给电力的装置中，另一转换器CN与电源SS 。转换器CN由表示从转换器CCU产生的侧波的信号控制为电流指令。为此，通过加法器4计算循环电流指令值Icp和DC指令2的和，并且通过减法器5通过AC输入电流Is的整流和放大输出减去输出而产生的值是用作电流指令值来控制转换器CN。

2. 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

3. 发明专利

JP2009254041A Distributed power supply system 有权
标题翻译：分布式电源系统
公开(公告)号：JP2009254041A
公开(公告)日：2009-10-29
申请号：JP2008095937
申请日：2008-04-02
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ONO YASUNORI , UCHIYAMA MICHIYUKI , KONDO SHINICHI , MIYATA HIROAKI , NAKAMURA TOMOHARU
IPC分类号： H02J3/38
摘要： PROBLEM TO BE SOLVED: To provide a distributed power supply system which can suppress a voltage variation caused by its own output variation when operated by being connected to a power system. SOLUTION: The distributed power supply system includes a power generation part (solar panel) 9 and a power converter 8, and operated by being connected to the power system via an interconnection line 2. A system constant of the interconnected power system and a representative load pattern are recoded in a database 20 in advance, and a system parameter operator 110 calculates a system parameter which minimizes the voltage variation on the basis of the system constant and the representative load pattern, and a temperature calculated from a measurement value of a temperature sensor 7. An active/reactive power command value operator 120 creates active/reactive power command values from the system parameter, and a power controller 130 creates control signals of the power converter 8 corresponding to the command values. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够抑制由连接到电力系统操作时由其自身的输出变化引起的电压变化的分布式供电系统。解决方案：分布式电源系统包括发电部分（太阳能电池板）9和电力转换器8，并通过互连线路2连接到电力系统进行操作。互连电力系统的系统常数和预先在数据库20中重新编码代表性的负载模式，并且系统参数运算器110根据系统常数和代表性负载模式计算使电压变化最小的系统参数，以及从测量值有源/无功功率指令值运算器120根据系统参数产生有功/无功功率指令值，功率控制器130根据指令值产生功率转换器8的控制信号。版权所有（C）2010，JPO＆INPIT

4. 发明专利

JP2008285571A Heavy oil reforming method and heavy oil reforming integrated plant 有权
标题翻译：重油改造方法和重油改造综合工厂
公开(公告)号：JP2008285571A
公开(公告)日：2008-11-27
申请号：JP2007131129
申请日：2007-05-17
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： CHINO KOICHI , ONO YASUNORI , UCHIYAMA TOMOYUKI , TAKIZAWA TERUHIRO , NAKAMURA TOMOHARU
IPC分类号： C10G1/00 , C10G1/06 , C10J3/00
CPC分类号： Y02P20/133
摘要： PROBLEM TO BE SOLVED: To provide a heavy oil reforming method and a heavy oil reforming integrated plant, which are capable of effectively utilizing the electric power produced by the wind power generation. SOLUTION: The heavy oil is reformed by a procedure of setting the objective total electric power generation Wo to be generated by a wind power installation 20 and a gas turbine installation 38 based on forecast of electric energy required for heavy oil reforming, a procedure of operating the gas turbine installation 38 to near the obtained electric power generation based on the objective total electric power generation Wo and the predicted electric power generation Wwo of the wind power installation 20, a procedure of supplying a predetermined amount of electric power to a water electrolysis device 30, a procedure of distributing surplus power to a water treatment device 4 and an electric boiler 17 based on the predetermined priority when the total W of actual electric power generation of the wind power installation 20 and the gas turbine installation 38 exceeds the objective total electric power generation Wo, and a procedure of supplying the hydrogen generated by the water electrolysis device 30 to a heavy oil reforming device 23. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供能够有效利用风力发电产生的电力的重油改性方法和重油改质综合设备。解决方案：重油通过根据对重油改造所需的电能的预测设定由风力发电设备20和燃气轮机装置38产生的目标总发电量Wo的过程进行改造，基于目标总发电量Wo和风力发电设备20的预测发电量Wwo，使燃气轮机38的运转接近所获得的发电的程序，将规定量的电力供给到水电解装置30，当风力发电设备20和燃气轮机装置38的实际发电的总W超过了水电解装置30时，基于预定的优先级向剩余电力分配给水处理装置4和电锅炉17的步骤客观总发电Wo，以及供给由水电生成的氢的工序裂解装置30至重油重整装置23.版权所有（C）2009，JPO＆INPIT

5. 发明专利

JPH11252800A POWER SYSTEM FREQUENCY STABILIZER 失效
公开(公告)号：JPH11252800A
公开(公告)日：1999-09-17
申请号：JP4681498
申请日：1998-02-27
申请人： HITACHI LTD , CHUBU ELECTRIC POWER
发明人： SATO YASUO , FUKUI CHIHIRO , NAKAMURA TOMOHARU , TSUBOUCHI MOTOTAKA , KOJIMA MASAMICHI
IPC分类号： H02J3/00 , G06F17/00 , G06Q10/04 , G06Q50/00 , G06Q50/06 , H02J3/24
摘要： PROBLEM TO BE SOLVED: To provide a stabilizer which forecasts the frequency at the future points of time and perform proper control by observing the frequency ripples within a separation system, over multiple point with respect to time. SOLUTION: Immediately after the occurrence of separation, a frequency multiple point observation means 107 performs frequency observation at many points with respect to time after roughly keeping the balance between demand and supply with a tidal current correction means 105, and it is kept in custody in a frequency time series data storage device. Based on this, a frequency response forecasting means 109 expresses the temporal changes in the frequency in an approximating numerical formula. A frequency correction control means 110 performs the forecasting of the frequency at future points of time from a frequency response estimation formula, and when this value does not satisfy the use conditions, this stabilizer outputs a control command to perform the required cancellation of unbalance between demand and supply. As a result, since excessive control can be prevented, the reliability on separation system can be improved.

6. 发明专利

JPH11234905A POWER SYSTEM STABILIZER 失效
公开(公告)号：JPH11234905A
公开(公告)日：1999-08-27
申请号：JP3607098
申请日：1998-02-18
申请人： HITACHI LTD , CHUBU ELECTRIC POWER
发明人： SATO YASUO , FUKUI CHIHIRO , NAKAMURA TOMOHARU , TSUBOUCHI MOTOTAKA , KOJIMA MASAMICHI
IPC分类号： H02J3/00 , H02J3/24
摘要： PROBLEM TO BE SOLVED: To estimate the various characteristics of a separated system after the power supply limitation is practiced when the system is separated, select the machine whose power supply is to be limited and maintain the characteristics, such as the frequency characteristics, etc., of the separated system properly after the power supply limitation is practiced. SOLUTION: A power system stabilizer is composed of a monitoring means 71 which monitors the outputs of a plurality of generators 4 in a separated system which is expected to be separated while the system is still in an ordinary state, a memory means 73 in which various constants related to the characteristics of the plurality of generators are stored and a power supply limiting means 72 which practices control for the stabilization of the separated system when the system is separated. When the machines whose power supplies are to be limited are selected in accordance with a power supply limit value calculated for the stabilization, the power supply limiting means 72 makes the summation of the outputs of the plurality of generators selected as control object candidates correspond to the power supply limit value and, further, performs the estimation operation of the various characteristics of the separated system after the power supplies to the control object candidates are limited to judge whether conditions are satisfied or not. If the conditions are satisfied, the plurality of generators which are the control object candidates are determined to be the objects of the power supply limitation.

7. 发明专利

JPH1125135A CAD SYSTEM DEALING WITH HIERARCHICAL CHART 失效
公开(公告)号：JPH1125135A
公开(公告)日：1999-01-29
申请号：JP17550797
申请日：1997-07-01
申请人： HITACHI LTD
发明人： INOUE HIDEKI , NAKAMURA TOMOHARU , OGINO KAZUHIRO , KOMATSU SHINJI , OMORI TAKAHIRO , KOBAYASHI YASUHIRO , KAWAMOTO SHIGERU
IPC分类号： H01L21/82 , G06F17/50
摘要： PROBLEM TO BE SOLVED: To partially display element cells and to grasp the operation of a circuit at a glance by deforming the frame of a related hierarchical element and making it invisible with the smoothing of connection. SOLUTION: On the drawing outputted directly to a display means 205, the display form of defined hierarchical elements is controlled by an element cell display control means 206 through an ordinary type hierarchy design supporting means 203. Next, the positions of input/output ports at the hierarchical elements are deviated while using an inter-hierarchical element wiring smoothing means 207 so that smoothing of wiring is performed. Besides, when it gets necessary to deform the frame of the hierarchical element by moving the port with the smoothing of wiring, while using a hierarchical element frame deforming means 208, the hierarchical element frame is deformed. Then, a seamless view generating means 204 generates the seamless chart not to be conscious of any hierarchical element by turning off the display of hierarchical element ports and frames while totally managing a control means 206, smoothing means 207 and deforming means 208.

8. 发明专利

JPH05216720A METHOD AND DEVICE FOR GENERATION OF INSPECTION DATA 失效
公开(公告)号：JPH05216720A
公开(公告)日：1993-08-27
申请号：JP2226392
申请日：1992-02-07
申请人： HITACHI LTD
发明人： NAKAHARA TAKAYUKI , NAKAMURA TOMOHARU , KOBAYASHI YASUHIRO
IPC分类号： G06F11/22 , G06F11/28
摘要： PURPOSE:To perform the inspection of digital device software by describing faults in a wide range and with high efficiency by setting data required for fault assumption in a form of tree structure based on dependence with a fault mode. CONSTITUTION:The fault assumption data of an inspection target and a fault assumption extension rule are supplied in advance, and the dependence with the fault mode is established. A system user inputs a sequence block diagram that is a design drawing of the digital device software of the inspection target to an input device 120 by a block diagram storage medium 110. The block diagram is stored in a block diagram memory device 180 via data transmission equipment 190. Processing based on an instruction by an inference execution device 130 is executed at an arithmetic processing unit 170, and the fault assumption data stored in a knowledge memory device 140 is applied, then, inspection data can be generated. The inspection data is outputted to an inspection data storage medium 160 by an output device 150.

9. 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.

10. 发明专利

JPH0155424B2 失效
公开(公告)号：JPH0155424B2
公开(公告)日：1989-11-24
申请号：JP2700181
申请日：1981-02-27
申请人： HITACHI LTD
发明人： KAWAI TADAO , NAKAMURA TOMOHARU
IPC分类号： G01R27/18 , G01R31/02 , H02H1/04 , H02H3/00 , H02H3/16 , H02H7/26
摘要： A ground detecting device for detecting a ground fault in a DC circuit, through which a DC power produced by converting a poly-phase AC power by an AC-DC converter is transmitted and which is connected at an earth point to the earth, is arranged to detect an earth current flowing through the earth point and extract a DC component, if any, from the detected earth current and to judge whether a ground fault has occurred or not by comparing the level of the DC component with a predetermined reference level.

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