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1. 发明授权

US12001181B2 Power generation planning apparatus 有权
公开(公告)号：US12001181B2
公开(公告)日：2024-06-04
申请号：US17299393
申请日：2019-10-18
申请人： HITACHI, LTD.
发明人： Yoshihito Kinoshita , Masahiro Watanabe
IPC分类号： G05B19/042
CPC分类号： G05B19/042 , G05B2219/2639
摘要： A power generation planning apparatus that calculates a generation plan which is a plan of starting and stopping and output power of electric generators. The apparatus includes an information calculation unit that calculates demand and supply of electric power, a plan calculation unit that calculates the generation plan of the starting and stopping and the output power of the electric generators by using, as an input, the generation information calculated by the information calculation unit, and an adjustment unit that calculates a generation plan with a time interval shorter than the generation plan by adjusting a starting initiation time and/or a stopping initiation time of the electric generator in the generation plan such that total power generation cost is reduced by using, as inputs, the generation plan calculated by the plan calculation unit and generation information with a time interval shorter than the generation plan.

2. 发明公开

US20240113558A1 POWER SYSTEM SUPERVISORY CONTROL APPARATUS, POWER SYSTEM SUPERVISORY CONTROL SYSTEM, AND POWER SYSTEM SUPERVISORY CONTROL METHOD 审中-公开
公开(公告)号：US20240113558A1
公开(公告)日：2024-04-04
申请号：US18253876
申请日：2021-10-25
申请人： HITACHI, LTD.
发明人： Daichi Kato , Masahiro Watanabe , Takahisa Matsuzaki , Yohei Murakami
IPC分类号： H02J13/00 , H02J3/00
CPC分类号： H02J13/00034 , H02J3/001 , H02J3/004 , H02J13/00002 , H02J2203/20 , H02J2300/20 , H02J2310/52 , H02J2310/60
摘要： A power system supervisory control apparatus, a power system supervisory control system, and a power system supervisory control method for reducing social cost and improving resilience of a power system are provided. The power system supervisory control apparatus including multiple renewable energy power supplies includes: a system influence degree evaluation section that evaluates a system influence degree when a renewable energy fluctuation or an assumed fault has an influence on the power system by using, as computation conditions, system data for obtaining a state of the power system, renewable energy fluctuation data indicative of a fluctuation of a power generation output, and assumed fault data of an assumed fault in the power system, and calculates system influence degree evaluation result data; a computation condition selection index calculation section that calculates a selection index for the computation conditions; and a condition selection section that selects the computation conditions.

3. 发明授权

US11421976B2 Shape measurement system, probe tip unit, and shape measurement method 有权
公开(公告)号：US11421976B2
公开(公告)日：2022-08-23
申请号：US17338207
申请日：2021-06-03
申请人： HITACHI, LTD.
发明人： Tatsuo Hariyama , Masahiro Watanabe , Atsushi Taniguchi , Kenji Maruno
IPC分类号： G01B9/02 , G01B9/02015
摘要： Provided is a shape measurement system in order to perform three-dimensional measurement corresponding to a measurement object having various shapes, which includes a measurement probe, a probe tip, and a processor. The probe tip includes an optical element that is configured to irradiate an object with measurement light and a cylindrical unit that is configured to lock the optical element. The processor is configured to calculate an optical path length from the optical element to an object based on reflected light of the measurement light with which the object is irradiated; and calculate a three-dimensional shape of the object based on the input information and the optical path length.

4. 发明授权

US11121553B2 Power system stability analysis device, stabilization apparatus, and method 有权
公开(公告)号：US11121553B2
公开(公告)日：2021-09-14
申请号：US16652091
申请日：2017-10-31
申请人： Hitachi, Ltd.
发明人： Yuki Tsujii , Masatoshi Kumagai , Kenedward Kawakita , Masahiro Watanabe
IPC分类号： H02J3/24 , H02J13/00 , G05B15/02
摘要： There is provided a power system stability analysis device that analyzes stability of a power system by obtaining measurement data from a high-accuracy measurement device and existing measuring instruments installed in the power system, the apparatus including: a system state estimation unit that estimates a system state of the power system by using measurement data from the existing measuring instruments at a plurality of points in the power system; a synchronous stability analysis unit that analyzes synchronous stability in an assumed failure by using an estimation result of the system state; and a synchronous stability analysis correction unit that corrects the synchronous stability according to a difference between the estimation result of the system state and the measurement data of the high-accuracy measurement device to improve accuracy of synchronous stability analysis of the power system.

5. 发明授权

US10361560B2 Power system control instruction device and method for controlling a voltage of a power system 有权
公开(公告)号：US10361560B2
公开(公告)日：2019-07-23
申请号：US15129721
申请日：2014-03-31
申请人： Hitachi, Ltd.
发明人： Shota Omi , Masatoshi Kumagai , Kenichiro Yamane , Masahiro Watanabe
IPC分类号： H02J3/12 , H02J13/00 , G05B17/02
摘要： A power system control instruction device performing a control instruction to the control device that controls the power system on the basis of a measured value transmitted from a sensor measuring a state value of the power system and a method for performing such a control instruction are provided. The device obtains a centralized control amount using a measured value of the sensor such that a system voltage meets a predetermined control purpose, and creates a distributed control model using the measured value and the centralized control amount. The device then determines whether or not a voltage deviation from the voltage appropriate range occurs when the control device performs control on the basis of the distributed control model, and re-creates the distributed control model when the voltage deviation occurs, and transmits the distributed control model that is re-created to the control device.

6. 发明授权

US09606554B2 Voltage adjustment device for power distribution system, voltage adjusting method, and power control system 有权
公开(公告)号：US09606554B2
公开(公告)日：2017-03-28
申请号：US14418236
申请日：2013-07-24
申请人： Hitachi, Ltd. , Tohoku Electric Power Co., Inc. , Tohoku Electric Manufacturing Co., Ltd.
发明人： Masahiro Watanabe , Ryo Egashira , Kenichiro Yamane , Katsuhiro Matsuda , Takafumi Futakami , Toshiyuki Seto , Jun Murakoshi
IPC分类号： G05F1/14 , H02J3/18
CPC分类号： G05F1/14 , H02J3/1878 , Y02E40/12 , Y02E40/30
摘要： A voltage adjustment device, a voltage adjusting method and a power control system for a distribution system are provided, in which the voltage adjustment device and a static var compensator are appropriately operated in a coordinated manner and the sustention of voltage and the enhancement of the operation efficiency are attained. A voltage adjustment device for a distribution system is installed in the distribution system including a static var compensator on an end side and controls a secondary voltage to be within a predetermined limit value by adjusting a tap position. The voltage adjustment device includes a first unit configured to estimate the secondary voltage; a second unit configured to obtain a corrected voltage by correcting the estimated secondary voltage by using a correction amount obtained from an output of the static var compensator; and a third unit configured to compare the corrected voltage with the predetermined limit value and operate the tap position when the corrected voltage deviates from the predetermined limit value.

7. 发明申请

US20150340862A1 CONTROL COMMAND APPARATUS, POWER SYSTEM CONTROL SYSTEM AND CONTROL COMMAND METHOD 有权
标题翻译：控制命令装置，动力系统控制系统和控制命令方法
公开(公告)号：US20150340862A1
公开(公告)日：2015-11-26
申请号：US14655957
申请日：2012-12-29
申请人： HITACHI, LTD.
发明人： Hideyuki Kobayashi , Masahiro Watanabe
IPC分类号： H02J3/00 , G05B15/02
CPC分类号： H02J3/00 , G05B15/02 , Y04S10/18 , Y04S20/48
摘要： A control command apparatus in a power system selecting a measuring apparatus according to a power system state, includes: a measuring apparatus extraction unit (112) extracting a measuring apparatus (2) between a first and second control apparatus (3) downstream the first control apparatus (3), or a measuring apparatus (2) downstream the first control apparatus (3) if no second control apparatus (2) exists, when a predetermined condition is satisfied, based on system configuration information (121), and generating measuring apparatus information (123) associating the extracted measuring apparatus (2) and the first control apparatus (3) with each other; and a control command generation unit (114) acquiring a measurement value from the measuring apparatus (2), identifying a control apparatus (3) associated with the measuring apparatus (2) as a the measurement value source based on the measuring apparatus information (123), and calculating and outputting a control parameter to the identified control apparatus (3).
摘要翻译：根据电力系统状态选择测量装置的电力系统中的控制指令装置包括：测量装置提取单元，在第一控制下游的第一和第二控制装置（3）之间提取测量装置（2）装置（3）或第一控制装置（3）下游的测量装置（2），如果不存在第二控制装置（2），则当基于系统配置信息（121）满足预定条件时，生成测量装置将所提取的测量装置（2）与第一控制装置（3）相关联的信息（123）; 以及控制指令生成单元，从所述测量装置获取测量值，基于所述测量装置信息，将与所述测量装置（2）相关联的控制装置（3）识别为所述测量值源），并且向所识别的控制装置（3）计算和输出控制参数。

8. 发明授权

US09001480B2 Distributed energy resources control apparatus and distributed energy resources control method 有权
标题翻译：分布式能源控制装置和分布式能源资源控制方法
公开(公告)号：US09001480B2
公开(公告)日：2015-04-07
申请号：US13770177
申请日：2013-02-19
申请人： Hitachi, Ltd.
发明人： Yasuo Sato , Takafumi Ebara , Masahiro Watanabe , Tsukasa Onishi
IPC分类号： H02H7/00 , H02M7/00 , H02M1/42 , H02M1/38
CPC分类号： H02M7/00 , H02J3/381 , H02J2003/388 , H02M1/4225 , H02M2001/385 , Y02B70/126
摘要： A distributed energy resources control apparatus for controlling power from a distributed energy resource in a system section separable from a power system includes a detecting unit, a receiving unit, and a control unit. The detecting unit detects a fault of the power system. The receiving unit receives a signal indicating authorization for the distributed energy resource to perform independent operation as linking with the system section, when the system section is separated from the power system. The control unit controls a power converter converting power from the distributed energy resource and outputting to the system section, based on measurement results of a voltage and a frequency of the system section, when the fault is detected and the signal is received.
摘要翻译：用于控制与电力系统分离的系统部分中的分布式能源的电力的分布式能源控制装置包括检测单元，接收单元和控制单元。检测单元检测电力系统的故障。当系统部分与电力系统分离时，接收单元接收指示分配能量资源的授权以执行独立操作的信号，作为与系统部分的链接。当检测到故障并接收信号时，控制单元根据系统部分的电压和频率的测量结果，控制从分布式能量转换功率的功率转换器并将其输出到系统部分。

9. 发明公开

US20230221716A1 POWER SYSTEM MONITORING CONTROL SYSTEM AND METHOD 审中-公开
公开(公告)号：US20230221716A1
公开(公告)日：2023-07-13
申请号：US17998312
申请日：2021-04-30
申请人： HITACHI, LTD.
发明人： Daichi Kato , Eisuke Kuroda , Masahiro Watanabe
IPC分类号： G05B23/02
CPC分类号： G05B23/0291 , G05B2223/06
摘要： A power system monitoring control system and method that retains a control table and, when a failure occurs, controls a target according to a type of the failure according to the control table in which the method includes: estimating a contingency point which is an occurrence point of the failure that is assumed in the power system based on prescribed disaster information; estimating an assumed disaster content which is a content of a disaster at each contingency point based on the disaster information and an estimation result of the contingency point; changing contingency data based on an estimation result of the assumed disaster content at each contingency point, contingency data including an occurrence site and an aspect of each of the failures that are assumed to occur, and a contingency change rule including a contingency data change rule; and updating the control table based on changed contingency data.

10. 发明授权

US11042134B2 Power system status estimation device and status estimation method 有权
公开(公告)号：US11042134B2
公开(公告)日：2021-06-22
申请号：US16338039
申请日：2017-10-20
申请人： Hitachi, Ltd.
发明人： Masahiro Watanabe , Yuki Tsujii , KenEdward Kawakita , Masatoshi Kumagai
IPC分类号： G05B13/04 , G06F17/13 , H02J13/00 , H02J3/00 , G06Q10/04 , G06Q50/06 , H02J3/18
摘要： Provided is a power system status estimation device capable of increasing the likelihood that status estimation calculations converge. Thus, a power system status estimation device 1 is equipped with: a measured value selection unit 102 for selecting a prescribed combination of measured values using which it is predicted that the power system status estimation calculations will converge, from among the measured values from each sensor provided in the power system; and a status estimation calculation unit 101 for estimating the status of the power system on the basis of the prescribed combination of measured values selected by the measured value selection unit and the system model for the power system.

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