Abstract: This power system operation assisting device is provided with: a multiple signal frequency specifying unit that uses, as inputs, measured data of an object to be measured and a frequency specifying parameter for calculating a frequency component of the measured data to calculate an oscillation frequency; a generation source candidate calculation unit that uses, as an input, the calculated oscillation frequency to calculate a generation source candidate of an unstable oscillation occurring in a power system; a generation source guarantee test unit that calculates the guarantee test result of the generation source candidate; and a display unit that displays the oscillation frequency, the generation source candidate, and the guarantee test result.

Abstract: 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.

Abstract: An operation support device is provided with: a similarity determination unit for determining the similarity between actual measured data and simulated data, said actual measured data being measured in an operation target after performing control on the operation target on the basis of, among a plurality of control candidates managed using a control candidate table, a control candidate corresponding to an event having occurred in the operation target, said simulated data being obtained by a simulation assuming the system state of the operation target after performing control on the operation target on the basis of system data indicating the state of the operation target before performing the control on the operation target; and a control candidate table update unit for updating the control candidate table in accordance with the determination result of the similarity determination unit.

Abstract: 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.

Abstract: A power demand/supply adjustment power procurement plan support device supports a power system through a power transaction in the power market and has an added power transmission capacity analysis means and a target power transmittable capacity determination means. The added power transmission capacity analysis means obtains: actual power supply data including a power supply having supplied power to the power system and the actual value of a power supply amount; an actual power system stabilization data including a power supply performing power supply restriction for power system stabilization, an electric control amount or a customer facility performing a load restriction, and the actual value of a load control amount; and an actual power demand/supply adjustment power procurement data including a procurement amount of the power demand/supply adjustment power of a power supply participating in the power market and the actual value of the total procurement cost.

Abstract: In a power system stabilization device and power system stabilization method, an excess/shortage of control is prevented and an appropriate control suitable for the system state is enabled. A power system stabilization device including a central processing unit in which there is determined, in advance, a device subject to control necessary to maintain stability when an assumed failure in a power system including renewable energy occurs, wherein the central processing unit executes, for each of a plurality of assumed failures, a computation for determining a subject of control necessary to maintain stability at the time of the assumed failure, and determines, in accordance with an output fluctuation scenario for renewable energy pertaining to the weather, the degree of priority of performing a computation for determining a subject of control necessary to maintain stability at the time of each of the assumed failures.

Abstract: A system operation support device in a power system stabilizes the power system and has a predicted accident time system state calculation unit that receives measured data, a system topology, and a target accident type as inputs, and calculates a system state and a predicted accident time system state. A control menu calculation unit receives the results of the predicted accident time system state as inputs and calculates a control menu. A restoration control means calculation unit receives the result of the control menu calculation as an input and calculates a restoration control procedure. A restoration prevention control procedure calculation unit receives the result of the restoration control and a target restoration time parameter as inputs and performs a power generator output adjustment time simulation, a necessary prevention control amount calculation, and a prevention control procedure calculation. A display unit displays the restoration control procedure and the prevention control procedure.

Abstract: A manipulation candidate classification unit provided in this operation assistance device classifies manipulation logs associated with a plurality of events stored in a past case database, as manipulation candidates, on the basis of measured value feature quantity tolerance ranges, and groups the classified manipulation candidates and the measured value feature quantity tolerance ranges together to create manipulation candidate groups. A manipulation candidate search unit searches a manipulation candidate database for a manipulation candidate group associated with a feature quantity that is associated with a past event and that is close to a feature quantity associated with a new event, and outputs the found manipulation candidate group to an output unit.

Abstract: A system operation decision-making assistance device includes: a state mode clustering unit that calculates, on the basis of measurement data DB1 of a power system and a clustering parameter DB3, which state mode, from among prescribed state modes, applies to a power system; a state mode collation unit that collates state transition data DB4 indicating transitions between state modes and the calculated state mode to calculate state transition probability data, which is the probability of transitioning from the calculated state mode to each state mode defined in the state transition data; and an accident shift pattern calculation unit that calculates important accident cases on the basis of a system model DB2, an importance parameter DB5 including the importance of a power system accident, the measurement data, and the calculated state transition probability data.

Abstract: This power system operation assisting device is provided with: a multiple signal frequency specifying unit that uses, as inputs, measured data of an object to be measured and a frequency specifying parameter for calculating a frequency component of the measured data to calculate an oscillation frequency; a generation source candidate calculation unit that uses, as an input, the calculated oscillation frequency to calculate a generation source candidate of an unstable oscillation occurring in a power system; a generation source guarantee test unit that calculates the guarantee test result of the generation source candidate; and a display unit that displays the oscillation frequency, the generation source candidate, and the guarantee test result.

Abstract: An operation support device is provided with: a similarity determination unit for determining the similarity between actual measured data and simulated data, said actual measured data being measured in an operation target after performing control on the operation target on the basis of, among a plurality of control candidates managed using a control candidate table, a control candidate corresponding to an event having occurred in the operation target, said simulated data being obtained by a simulation assuming the system state of the operation target after performing control on the operation target on the basis of system data indicating the state of the operation target before performing the control on the operation target; and a control candidate table update unit for updating the control candidate table in accordance with the determination result of the similarity determination unit.

Abstract: A system operation support device in a power system stabilizes the power system and has a predicted accident time system state calculation unit that receives measured data, a system topology, and a target accident type as inputs, and calculates a system state and a predicted accident time system state. A control menu calculation unit receives the results of the predicted accident time system state as inputs and calculates a control menu. A restoration control means calculation unit receives the result of the control menu calculation as an input and calculates a restoration control procedure. A restoration prevention control procedure calculation unit receives the result of the restoration control and a target restoration time parameter as inputs and performs a power generator output adjustment time simulation, a necessary prevention control amount calculation, and a prevention control procedure calculation. A display unit displays the restoration control procedure and the prevention control procedure.

Abstract: The voltage and reactive power monitoring/control method includes: measurement data for the power system and data for the system equipment of the power system are used to calculate the system status for the power system at the time of measurement; data for a status estimation calculation result and predicted data for the power generation and load of the power system are used to predictively calculate a system status at a future time from the time of the power system measurement; a fluctuation component is obtained for the predicted value of the data obtained from the power system; the reactive power required to suppress the fluctuation component is obtained, as a required reactive power amount; a reactive power distribution subject is selected from a plurality of pieces of control subject equipment; an output distribution calculation is performed for the required reactive power amount for the selected control subject equipment.

Abstract: With conventional technology, since calculation of system stability is performed regarding all imaginable failure cases for the combinations of all objects to be controlled to determine an object to be controlled, there has been a problem of not being able to determine an object to be controlled in all the imaginable failure cases within a calculation period due to longer calculation time.

Abstract: 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.

Abstract: In order to provide a power grid decision-making support device and method which are capable of providing operator decision-making support, and quickly presenting control candidates, and a system which applies the same, one representative embodiment of the present invention provides a power grid decision-making support device characterized by comprising: a control candidate learning unit for deriving, by learning, a plurality of control candidate models for stabilizing a power grid; a control candidate extraction unit for extracting, from the plurality of control candidate models derived by the control candidate learning unit, control candidates using power grid measurement data and extraction parameters; a control candidate evaluation unit for evaluating the control candidates using a power grid model and the control candidates; and an information presentation unit for presenting information about the evaluation results and the control candidates.

Abstract: 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.

Abstract: A system stability monitoring device monitors the stability of a power system and is equipped with: a storage unit for storing spot information indicating the positional relationship between a plurality of measurement spots in the power system; a receiving unit for receiving time-series measurement information measured by a measuring device provided at each of the measurement spots; and a calculation unit for detecting the frequency components of the power fluctuation from the measurement information, selecting, based on the frequency components, measurement spot group candidates that are measurement spots among the plurality of measurement spots, obtaining the electrical distances between the measurement spot group candidates on the basis of the spot information, and categorizing the measurement spot group candidates into at least one measurement spot group on the basis of the electrical distances.

Abstract: The setting range of the voltage and the reactive power of a power system is maintained during variations of voltage and power flow due to the output variation of renewable energy of a large number of power supplies which fluctuate due to weather. A voltage/reactive power operation assisting device is 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 stores the device operation data of the individual control device; and the operation of the individual control device is predicted from the data stored in the first database to obtain individual control device operation prediction data. A display unit displays the individual control device operation prediction data and the device operation data in a contrastive manner.

Abstract: In a power system stabilization device and power system stabilization method, an excess/shortage of control is prevented and an appropriate control suitable for the system state is enabled. A power system stabilization device including a central processing unit in which there is determined, in advance, a device subject to control necessary to maintain stability when an assumed failure in a power system including renewable energy occurs, wherein the central processing unit executes, for each of a plurality of assumed failures, a computation for determining a subject of control necessary to maintain stability at the time of the assumed failure, and determines, in accordance with an output fluctuation scenario for renewable energy pertaining to the weather, the degree of priority of performing a computation for determining a subject of control necessary to maintain stability at the time of each of the assumed failures.