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1. 发明授权

EP2963757B1 POWER SYSTEM CONTROL SYSTEM AND DISTRIBUTED CONTROLLER USED IN SAME 失效
公开(公告)号：EP2963757B1
公开(公告)日：2018-06-20
申请号：EP13876590.4
申请日：2013-02-28
申请人： Hitachi, Ltd.
发明人： KUMAGAI Masatoshi , OMI Shota , YAMANE Kenichiro , HARADA Yasushi , WATANABE Masahiro , SATO Yasuo , TOMITA Yasushi
IPC分类号： H02J3/16 , G01R19/25 , H02J3/00
CPC分类号： H02J3/16 , G01R19/25 , H02J2003/007 , Y02E40/34 , Y02E60/76 , Y04S40/22
摘要： An electric power system control system for an electric power system in which loads and voltage control devices are connected together via nodes comprises distributed controllers for issuing control commands to the voltage control devices. The distributed controller includes a measurement value data collection functional unit, a state estimation functional unit and an optimum control functional unit. The measurement value data collection functional unit collects measurement value data from sensors measuring voltage and current in its own node and other nodes. The state estimation functional unit receives the measurement values of voltage and current of the own node and the other nodes as input data, estimates voltage or current as a state quantity of each of other nodes from which the measurement value data cannot be collected, and outputs the estimate values. The optimum control functional unit receives input data such as the measurement value data, the estimate values outputted from the state estimation functional unit and a voltage target value that has been set for each node and outputs a control command based on operation amounts to be distributed to the voltage control devices of the nodes. The voltage in the electric power system is controlled by superposition of voltage control amounts by the voltage control devices.

2. 发明公开

EP3288139A1 POWER SYSTEM STABILIZATION SYSTEM AND METHOD 审中-公开
标题翻译：电力系统稳定系统及方法
公开(公告)号：EP3288139A1
公开(公告)日：2018-02-28
申请号：EP15889905.4
申请日：2015-04-24
申请人： Hitachi, Ltd.
发明人： OMI Shota , KUMAGAI Masatoshi , YAMANE Kenichiro
IPC分类号： H02J3/00 , H02J3/24
CPC分类号： G05B19/40937 , G05B19/41885 , G05F1/66 , H02J3/18 , H02J3/24 , H02J3/38 , H02P9/105
摘要： It is possible by means of a system simulation device to extract a disturbance mode wherein multiple accident conditions are assumed and to determine control parameters, but when the number of accident conditions increases, a threshold value pertaining to a divergence constant deviates prior to an update period, with the result that an uncontrollable disturbance mode appears. In order to solve this problem, the present invention is a power system stabilization system for determining control parameters for a control device connected to a power system, the power system stabilization system equipped with: a disturbance mode prediction unit for predicting a disturbance mode of a power system on the basis of operation information and an assumed system configuration for the power system; a post-control parameter update period prediction unit for predicting an update period for a post-control parameter in post-control after a disturbance has occurred; a threshold value setting unit for setting a threshold value pertaining to a divergence constant on the basis of the disturbance mode and the update period for the post-control parameter; and a control parameter determination unit for determining a control parameter of the control device on the basis of the disturbance mode and the threshold value.
摘要翻译：借助于系统模拟装置可以提取其中假定多个事故条件并确定控制参数的干扰模式，但是当事故条件的数量增加时，与散度常数有关的阈值在更新周期之前偏离，结果出现无法控制的干扰模式。为了解决这个问题，本发明是一种电力系统稳定化系统，用于确定连接到电力系统的控制装置的控制参数，该电力系统稳定系统配备有：干扰模式预测单元，用于预测干扰模式基于电力系统的操作信息和假定的系统配置; 控制后参数更新周期预测单元，用于预测发生扰动后的后控制中的控制后参数的更新周期; 阈值设定单元，其基于所述干扰模式和所述控制后参数的更新周期来设定与发散常数有关的阈值; 以及控制参数确定单元，用于基于干扰模式和阈值来确定控制装置的控制参数。

3. 发明公开

EP3531525A1 VOLTAGE/REACTIVE POWER OPERATION ASSISTING DEVICE AND ASSISTING METHOD, AND VOLTAGE/REACTIVE POWER OPERATION MONITORING CONTROL DEVICE AND MONITORING CONTROL METHOD 审中-公开
公开(公告)号：EP3531525A1
公开(公告)日：2019-08-28
申请号：EP17861450.9
申请日：2017-09-04
申请人： Hitachi, Ltd.
发明人： KURODA Eisuke , SAITO Nao , HARA Kouichi , YATSU Masahiro , KAWAHARA Taichiro , OMI Shota
IPC分类号： H02J3/00 , H02J3/16 , H02J13/00
摘要： Provided is a technique for achieving one or more of the following: maintaining the balance between and the setting range of the voltage and the reactive power of a power system; improving economic efficiency; and reducing the labor of an operator for setting a reference value, a target value, or a setting value of a voltage control device, even when one or more of the following occurs: the variations of voltage and power flow become large due to the output variation of renewable energy if a large number of power supplies (output fluctuation type power supplies), the outputs of which fluctuate due to weather, are introduced; and a power supply configuration or a system configuration is changed. A voltage/reactive power operation assisting device is characterized by being provided with: a first database for storing the data to be evaluated, target value data, individual control device control method data, and individual control device data of an individual control device for adjusting the voltage/reactive power of a power system; a second database for storing the device operation data of the individual control device; an individual control device operation prediction unit for predicting the operation of the individual control device from the data stored in the first database to obtain individual control device operation prediction data; and a display unit for displaying the individual control device operation prediction data and the device operation data in a contrastive manner.

4. 发明公开

EP3382840A1 POWER SYSTEM MONITORING DEVICE AND POWER SYSTEM MONITORING METHOD 有权
公开(公告)号：EP3382840A1
公开(公告)日：2018-10-03
申请号：EP16868376.1
申请日：2016-11-09
申请人： Hitachi, Ltd.
发明人： KUMAGAI Masatoshi , OMI Shota , YAMANE Kenichirou
IPC分类号： H02J3/00 , H02J13/00
CPC分类号： G01R21/133 , G01R31/343 , H02J3/00 , H02J13/00 , H02J2003/007
摘要： There is provided an electric power system monitoring apparatus that can estimate dynamic behavior constants using measurement signals and can obtain the accuracy of an estimation result. An apparatus 1 according to the present invention that monitors an electric power system includes a dynamic behavior constant estimation unit F10 to estimate a predetermined dynamic behavior constant from a measurement value obtained from the electric power system, a relative accuracy calculation unit F11 to calculate, from the measurement value, a relative accuracy index that indicates accuracy of a dynamic behavior constant estimation value estimated at the dynamic behavior constant estimation unit, and an estimation error calculation unit F12 to calculate an estimation error from reference dynamic behavior information, the dynamic behavior constant estimation value, and the relative accuracy index. Thus, after the accuracy of a dynamic behavior constant estimation value is grasped, a process using the estimation value can be executed.

5. 发明公开

EP2963757A1 POWER SYSTEM CONTROL SYSTEM AND DISTRIBUTED CONTROLLER USED IN SAME 失效
标题翻译：电力系统控制系统及其使用的分布式控制器
公开(公告)号：EP2963757A1
公开(公告)日：2016-01-06
申请号：EP13876590.4
申请日：2013-02-28
申请人： Hitachi, Ltd.
发明人： KUMAGAI Masatoshi , OMI Shota , YAMANE Kenichiro , HARADA Yasushi , WATANABE Masahiro , SATO Yasuo , TOMITA Yasushi
IPC分类号： H02J3/16
CPC分类号： H02J3/16 , G01R19/25 , H02J2003/007 , Y02E40/34 , Y02E60/76 , Y04S40/22
摘要： An electric power system control system for an electric power system in which loads and voltage control devices are connected together via nodes comprises distributed controllers for issuing control commands to the voltage control devices. The distributed controller includes a measurement value data collection functional unit, a state estimation functional unit and an optimum control functional unit. The measurement value data collection functional unit collects measurement value data from sensors measuring voltage and current in its own node and other nodes. The state estimation functional unit receives the measurement values of voltage and current of the own node and the other nodes as input data, estimates voltage or current as a state quantity of each of other nodes from which the measurement value data cannot be collected, and outputs the estimate values. The optimum control functional unit receives input data such as the measurement value data, the estimate values outputted from the state estimation functional unit and a voltage target value that has been set for each node and outputs a control command based on operation amounts to be distributed to the voltage control devices of the nodes. The voltage in the electric power system is controlled by superposition of voltage control amounts by the voltage control devices.
摘要翻译：负载和电压控制装置通过节点连接在一起的电力系统的电力系统控制系统包括用于向电压控制装置发出控制命令的分布式控制器。分布式控制器包括测量值数据收集功能单元，状态估计功能单元和最优控制功能单元。测量值数据收集功能单元收集来自测量它自己的节点和其他节点中的电压和电流的传感器的测量值数据。状态估计功能单元接收自身节点和其他节点的电压和电流的测量值作为输入数据，将电压或电流估计为不能从其收集测量值数据的每个其他节点的状态量，并输出估算值。最佳控制功能单元接收输入数据，诸如测量值数据，从状态估计功能单元输出的估计值以及已经为每个节点设置的电压目标值，并且输出基于要分配的操作量的控制命令节点的电压控制装置。电力系统中的电压由电压控制装置叠加电压控制量来控制。

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