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1. 发明授权

EP3163706B1 VOLTAGE STABILITY MONITORING DEVICE AND METHOD 有权
公开(公告)号：EP3163706B1
公开(公告)日：2019-11-06
申请号：EP15814491.5
申请日：2015-05-11
申请人： Hitachi, Ltd.
发明人： KURODA Eisuke , SATO Yasuo , TOMOBE Osamu , YAMAZAKI Jun , YATSU Masahiro , MIYOSHI Haruki
IPC分类号： H02J3/06 , H02J3/16 , H02J13/00 , H02J3/38

2. 发明公开

EP3136530A1 VOLTAGE STABILITY-MONITORING DEVICE AND METHOD 有权
标题翻译： VORRICHTUNG UND VERFAHREN ZURÜBERWACHUNGDERSPANNUNGSSTABILITÄT
公开(公告)号：EP3136530A1
公开(公告)日：2017-03-01
申请号：EP15783447.4
申请日：2015-04-06
申请人： Hitachi, Ltd.
发明人： KURODA Eisuke , SATO Yasuo , TOMOBE Osamu , YAMAZAKI Jun , YATSU Masahiro , HARA Kouichi , MIYOSHI Haruki
IPC分类号： H02J3/00 , H02J3/24
CPC分类号： G01R19/2513 , G01R19/0084 , H02J3/00 , H02J3/24 , H02J13/00
摘要： An object is to accurately monitor deterioration of current or future voltage stability, by dynamically changing a bus in which current or future voltage stability deteriorates, in stability monitoring calculation of a power system. Hence the present invention provides a voltage stability monitoring device, which monitors voltage stability of a power system, including an assumed change scenario calculation unit which produces a plurality of assumed change scenarios indicating a scenario of a change that is assumed based on at least one of a system configuration of the power system and a change of a tide state; a voltage stability calculation unit which calculates the voltage stability using the assumed change scenario; a voltage stability margin calculation unit which calculates a voltage stability margin indicating margin degree of the voltage stability, based on the voltage stability; an each scenario severity ranking calculation unit which selects an assumed change scenario with high severity of the voltage stability for each assumed change scenario, based on the voltage stability margin; a vulnerable bus calculation unit which calculates which of buses in the power system is a vulnerable bus that decreases voltage stability, based on the assumed change scenario which is selected; and a monitoring location change unit which changes a monitoring target of the voltage stability, based on information of the vulnerable bus.
摘要翻译：在电力系统的稳定性监测计算中，目的是通过动态地改变当前或将来的电压稳定性恶化的总线来精确地监测电流或将来的电压稳定性的恶化。因此，本发明提供了一种电压稳定性监视装置，其监测电力系统的电压稳定性，该电压稳定性监视装置包括假定的变化情景计算单元，该假设变化情景计算单元产生多个假设变化情景，该假设变化情景指示基于以下电力系统的系统配置和潮汐状态的变化; 电压稳定性计算单元，其使用所述假定的变化情况来计算电压稳定性; 电压稳定裕度计算单元，其基于电压稳定性计算表示电压稳定性的余量的电压稳定裕度; 每个情景严重度排序计算单元，基于所述电压稳定性裕度来选择对于每个假设变化情景具有高严重性的电压稳定性的假设变化情景; 弱电总线计算单元，基于所选择的假设变化情况，计算电力系统中的哪些总线是降低电压稳定性的易损性总线; 以及基于所述易损性总线的信息来改变所述电压稳定性的监视对象的监视位置变更部。

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

EP3392995A1 VOLTAGE STABILITY MONITORING DEVICE AND METHOD 有权
公开(公告)号：EP3392995A1
公开(公告)日：2018-10-24
申请号：EP16875286.3
申请日：2016-11-09
申请人： Hitachi, Ltd.
发明人： KURODA Eisuke , WATANABE Masahiro , YATSU Masahiro
IPC分类号： H02J3/00 , H02J3/24 , H02J13/00
CPC分类号： H02J3/00 , H02J3/24 , H02J13/00
摘要： A voltage stability monitoring device and a method capable of obtaining information of voltage stability that can be served to practical use within a range of assumed conditions during a predetermined monitoring period are provided. The present invention provides a voltage stability monitoring device for estimating a voltage stability by using a voltage stability curve representing the voltage stability in an electric power system, including a voltage stability limit prediction unit for predicting a voltage stability limit, a voltage stability calculation condition determination unit for determining voltage stability calculation conditions by using a prediction result of voltage stability limit, a voltage stability curve calculation unit for calculating the voltage stability curve using a result of the voltage stability calculation condition determination, and a voltage stability margin calculation unit for calculating a voltage stability margin using a calculation result of the voltage stability curve.

5. 发明公开

EP3389158A1 GENERATED POWER AMOUNT PREDICTION DEVICE, GENERATED POWER AMOUNT PREDICTION METHOD, GRID STABILIZATION DEVICE, AND GRID STABILIZATION METHOD 有权
公开(公告)号：EP3389158A1
公开(公告)日：2018-10-17
申请号：EP16872727.9
申请日：2016-10-26
申请人： Hitachi, Ltd.
发明人： KATO Daichi , SAITO Nao , YATSU Masahiro
IPC分类号： H02J3/00 , H02J3/24 , H02J3/38 , H02J13/00
CPC分类号： H02J3/00 , H02J3/24 , H02J3/38 , H02J13/00 , Y02A30/12 , Y02E40/72 , Y04S10/12 , Y04S10/123
摘要： To calculate the prediction of the power generation amount with high accuracy even when the amount of the track record data of the generator power generation amount is insufficient or the amount of the weather track record data similar to the weather prediction result is small. A power generation amount prediction apparatus for predicting a power generation amount at a power plant that performs power generation by use of renewable energy, including: a model generation unit that generates a mathematical model of the power generation amount of the power plant in regard to each model generation time based on a weather track record and an output power track record in regard to the power plant; a similar track record data extraction unit that obtains a weather track record similar to weather prediction data and a corresponding output power track record as similar track record data; a model accuracy calculation unit that calculates accuracy of each of a plurality of mathematical models of the model generation unit in a weather condition similar to the weather prediction data; a model selection unit that selects a mathematical model to be used for the prediction by using the accuracy of each of the models; and a model output power prediction unit that predicts the power generation amount of the power plant by using the selected mathematical model.

6. 发明公开

EP3379676A1 VOLTAGE/REACTIVE POWER CONTROL DEVICE AND METHOD, AND VOLTAGE/REACTIVE POWER CONTROL SYSTEM 有权
公开(公告)号：EP3379676A1
公开(公告)日：2018-09-26
申请号：EP16866101.5
申请日：2016-10-25
申请人： Hitachi, Ltd.
发明人： MIYAKE Toshiyuki , KURODA Eisuke , YATSU Masahiro
IPC分类号： H02J3/12 , H02J3/00 , H02J3/18 , H02J13/00
CPC分类号： H02J3/18 , G05B13/041 , H02J3/00 , H02J3/12 , H02J13/00 , H02J13/0017 , Y02E40/30 , Y02E40/74 , Y04S10/22
摘要： There is provided a voltage/reactive power control device, method, and a voltage/reactive power control system that allow a proper control even with a control delay or in a situation where the system conditions at the time of setting the voltage reference value may not be always reproduced. A voltage/reactive power control system is applied to a power system in which a monitoring point is set in a local system divided as appropriate from the power system and the local system includes a voltage/reactive power control device capable of adjusting voltage and reactive power at the monitoring point. The voltage/reactive power control system includes: a central control unit that sets a control target value of the voltage and reactive power at the monitoring point in the local system based on optimal power flow calculation using total system data on the power system, generates a correction function to correct the control target value in accordance with a change in state of the power system relating to the monitoring point by using past history information on the states of the power system, and outputs the control target value and at least one or more correction functions; a local control apparatus that, when the control target value is different from system data on the local system, uses the correction function to calculate a controlled variable for the voltage/reactive power control device necessary to attain the control target value; and a device control apparatus that controls the voltage/reactive power control device in accordance with the controlled variable from the local control apparatus.

7. 发明授权

EP3136530B1 VOLTAGE STABILITY-MONITORING DEVICE AND METHOD 有权
公开(公告)号：EP3136530B1
公开(公告)日：2018-07-25
申请号：EP15783447.4
申请日：2015-04-06
申请人： Hitachi, Ltd.
发明人： KURODA Eisuke , SATO Yasuo , TOMOBE Osamu , YAMAZAKI Jun , YATSU Masahiro , HARA Kouichi , MIYOSHI Haruki
IPC分类号： H02J3/00 , H02J3/24 , H02J13/00
CPC分类号： G01R19/2513 , G01R19/0084 , H02J3/00 , H02J3/24 , H02J13/00
摘要： An object is to accurately monitor deterioration of current or future voltage stability, by dynamically changing a bus in which current or future voltage stability deteriorates, in stability monitoring calculation of a power system. Hence the present invention provides a voltage stability monitoring device, which monitors voltage stability of a power system, including an assumed change scenario calculation unit which produces a plurality of assumed change scenarios indicating a scenario of a change that is assumed based on at least one of a system configuration of the power system and a change of a tide state; a voltage stability calculation unit which calculates the voltage stability using the assumed change scenario; a voltage stability margin calculation unit which calculates a voltage stability margin indicating margin degree of the voltage stability, based on the voltage stability; an each scenario severity ranking calculation unit which selects an assumed change scenario with high severity of the voltage stability for each assumed change scenario, based on the voltage stability margin; a vulnerable bus calculation unit which calculates which of buses in the power system is a vulnerable bus that decreases voltage stability, based on the assumed change scenario which is selected; and a monitoring location change unit which changes a monitoring target of the voltage stability, based on information of the vulnerable bus.

8. 发明公开

EP3297113A1 DEVICE FOR CONTROLLING LOAD FREQUENCY AND METHOD FOR CONTROLLING LOAD FREQUENCY 有权
标题翻译：用于控制负载频率的装置和用于控制负载频率的方法
公开(公告)号：EP3297113A1
公开(公告)日：2018-03-21
申请号：EP16792479.4
申请日：2016-04-15
申请人： Hitachi, Ltd.
发明人： KATO Daichi , KURODA Eisuke , TOMOBE Osamu , YATSU Masahiro
IPC分类号： H02J3/00 , H02J3/38
CPC分类号： H02J3/383 , H02J3/00 , H02J3/24 , H02J3/28 , H02J3/38 , H02J3/386 , H02J3/46
摘要： In order to maintain a system frequency within a permissible range under limitations of the output of a power source to be controlled, a calculation device pertaining to a load-frequency-controlling device of the present invention: predicts time-series data indicating the status of individual power sources in a future control period, the prediction being carried out on the basis of system model data, system data, and renewable energy data; calculates, on the basis of power source data, and for each of the power sources, at least any one of a deviation state indicating the degree to which the time-series data deviates from the limitations and/or a surplus state indicating the degree to which the time-series data shows a surplus with respect to the limitations; resolves the deviation state; and calculates the amount of adjustment in the output of each of the power sources, on the basis of the deviation state and the surplus state, under the condition that the total output of the power sources is maintained.
摘要翻译：本发明的负载频率控制装置的计算装置，为了将系统频率维持在被控制的电源的输出的限制下的容许范围内，预测时间序列数据，该时间序列数据表示未来控制时期的个别电源，预测是基于系统模型数据，系统数据和可再生能源数据进行的; 基于电源数据并且针对每个电源计算指示时间序列数据偏离限制的程度的偏差状态和/或指示程度的限制的剩余状态中的至少任一个其中时间序列数据显示在限制方面存在过剩; 解决偏差状态; 并且在保持电源的总输出的条件下，基于偏差状态和剩余状态来计算每个电源的输出的调节量。

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