Abstract: In a power system voltage reactive power monitoring control device, a balance between the power system voltage and the reactive power can be maintained even when, for example, the output of renewable energy varies over time due to the weather, or the power supply configuration or system configuration changes, and the economic efficiency can be improved. In the power system voltage reactive power monitoring control device, which supplies transmission data to individual devices capable of adjusting the voltage and the reactive power of a power system, indices indicating the stability of the power system are used to determine one or more target value restrictions, information about the target value is obtained from the target value restrictions, transmission data containing information about the target value is supplied to the individual devices, and the voltage and reactive power at the relevant installation site are adjusted by the individual devices.

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: A voltage stability monitoring device, which monitors voltage stability of a power system, 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, calculates the voltage stability using the assumed change scenario, calculates a voltage stability margin indicating margin degree of the voltage stability, based on the voltage stability selects an assumed change scenario with high severity of the voltage stability for each assumed change scenario, based on the voltage stability margin calculates which buses in the power system are vulnerable buses that decrease voltage stability, based on the assumed change scenario which is selected, and changes a monitoring target of the voltage stability, based on information of the vulnerable bus.

Abstract: A system stabilization control device controls a control instrument within a power system on the basis of measurement information from a plurality of measurement points within the power system. The system stabilization control device includes an equipment information database storing information of system equipment interconnected with the power system; a control priority determining unit determining the control priority of the control instrument on the basis of the information of the system equipment; a control target determining unit determining a control target on the basis of the measurement information from the plurality of measurement points and the control priority; a destabilization time calculating unit calculating destabilization time of the power system from the measurement information from the plurality of measurement points; and a control time determining unit determining control time of the control instrument on the basis of the destabilization time and the information of the system equipment.

Abstract: 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.

Abstract: When vibration information calculated using measurement information is classified using a distance between measurement points which is calculated using the point information, even in a case in which a plurality of vibration modes with close vibration frequencies are present at the same time, stability determination at a high speed and a high accuracy is realized. A system stability monitoring apparatus which monitors system stability of a power system includes a measurement information collecting unit that collects measurement information of a plurality of points in the power system, a vibration analyzing unit that calculates vibration information indicating vibration of a system state in the plurality of points using the measurement information, an information storage unit that stores point information including position information of the plurality of points, and a vibration classifying unit that classifies the vibration information based on the point information.

Abstract: The present invention monitors an electric power system using a time-series measurement value including abnormality.

Abstract: In administration based on the existing (N?1) reliability criteria, an appropriate administration plan may be not drafted in a power system in which renewable energy increases. Accordingly, according to the invention, a power system monitoring apparatus that monitors a power system includes: an input unit that inputs assumable system breakdown data including an occurrence frequency of each assumable breakdown of the power system and assumable output change data including an occurrence frequency of each assumable output change of each generator connected to the power system; and an output unit that generates conditions by which events of the assumable breakdowns and the assumable output changes are combined based on the occurrence frequencies of the assumable breakdown and the assumable output change and outputs a control plan for each of the conditions.

Abstract: A power conversion apparatus includes arms in each of which one or more unit converters each including a capacitor and capable of outputting an arbitrary voltage are connected in series, and a point P as a first node to which one end of the respective arms are Y-connected, and a point N as a second node to which a neutral terminal of the rotary electric machine is connected. The other end of the respective arms are connected to one ends of respective phase windings of a rotary electric machine.

Abstract: A map update data delivery method includes: storing update unit data compiled in correspondence to each set of update data used to update map data in a specific version to map data in another version for a map element by incorporating update data for another map element that must also be updated in coordination with a change made for the map element; searching for base update data needed to update a map data for a map element designated as an update target in a map area specified at a terminal as a map data update target; searching for related update data with a relation to contents of update data included in the base update data searched; and transmitting the base update data and the related update data to the terminal.

Abstract: A car navigation system 1 includes a HDD map 110 and a cached map 109. Map data for entire area is stored in the HDD, and map data used by a route search unit 115 and a guidance unit 116 are stored in the cached map 109. A cached map area specifying unit 108 specifies map data files that should be stored in the cached map 109 for each navigation application, and stores the names of the specified map data files, linked to the respective navigation applications, into a navigation application consistency management table 103. A consistency judgment unit 104 monitors an update status of a data file of which name stored in the navigation application consistency management table 103, and stores the update status (completed or not completed) into the navigation application consistency management table 103.

Abstract: A navigation device receives a differential map data from a map delivery server via a communication line. The map delivery server checks whether there is a new intersection on a navigation route searched by the navigation device after updating a map data. The navigation device acquires a differential map data containing the intersection from the map delivery server. Then, an update map data selection section determines whether the intersection can be updated in time. An update order determination section updates the differential map data which can be updated in time in ascending order of time required to reach the intersection.

Abstract: A digital broadcast receiving apparatus receives a digital broadcast signal, which consists of layers each obtained by dividing a transmission bandwidth into a plurality of segments and combining some of the segments, and outputs images and/or sound from one of the layers constituting the received digital signal. This apparatus is characterized by comprising broadcasting format retention means (channel to broadcasting format correspondence table database) for retaining the broadcasting format, for each layer, of each broadcast station and switching means (layer switching means) for switching the output layer based on the broadcasting format, for each layer, of each broadcast station retained in the broadcasting retention means. Thus, this apparatus can output images and sound without interruption.

Abstract: A point of interest (POI) search device includes: a static POI data storage means for storing therein a static POI data registered in advance; an added POI data storage means for storing therein an added POI data added or changed; a deleted POI data storage means for storing therein a deleted POI data for identifying a POI data which is not subjected to a search anymore, among the static POI data; a search keyword setting means; a computation switch means for computing the number of POI data matching the search keyword from among the static POI data and switching a computation processing of computing the number of POI data according to the computed number of POI data; and a POI search means for computing the number of POI data, using at least the static POI data and the added POI data according to the switched computation processing.

Abstract: A map update data delivery method includes: storing update unit data compiled in correspondence to each set of update data used to update map data in a specific version to map data in another version for a map element by incorporating update data for another map element that must also be updated in coordination with a change made for the map element; searching for base update data needed to update a map data for a map element designated as an update target in a map area specified at a terminal as a map data update target; searching for related update data with a relation to contents of update data included in the base update data searched; and transmitting the base update data and the related update data to the terminal.

Abstract: A relay station comprises an emergency information detection unit for detecting an emergency information broadcasting flag in the digital broadcasting TMCC signal transmitted from the center station; a replacement data creation unit for issuing an instruction for creating replacement contents and replacing the data when emergency information is multiplexed in the TS; and a time synchronization unit for executing time synchronization between the TS created by the data replacement and the TS before the data replacement. On a receiving terminal, the replaced data broadcasting contents can be received while prefectural broadcasting video and audio contents are continuously received.

Abstract: A navigation device receives a differential map data from a map delivery server via a communication line. The map delivery server checks whether there is a new intersection on a navigation route searched by the navigation device after updating a map data. The navigation device acquires a differential map data containing the intersection from the map delivery server. Then, an update map data selection section determines whether the intersection can be updated in time. An update order determination section updates the differential map data which can be updated in time in ascending order of time required to reach the intersection.

Abstract: In a digital broadcast multiplexing apparatus for multiplexing a plurality of programs on a single physical channel so as to broadcast the digital multiplexed broadcasting program, there are provided with an apparatus for correcting positions of PCR packets contained in transport streams within the respective programs, and a PCR correction value forming apparatus for applying values of correcting PCR values with respect to a result of the position corrections in order to simply execute a function capable of uniformly synchronizing the PCR packets contained in the transport streams and capable of viewing the received programs without any interruption on the reception side even when a tuning operation is carried out. Then, the digital broadcast multiplexing apparatus outputs such a broadcast program packet stream which has been multiplexed as a single broadcast program in such a manner that the PCR packets are synchronized with each other among the plurality of programs.

Abstract: In a destination search function, a narrow search function for displaying the number of hits and next candidates, when an index having data on the number of hits and the next candidate characters is held and a narrow search is speeded up referring to the index during a search. Only about a narrow search result in which the hit numbers is large such that a search time is elongated when referring to numbers, indexes in which the number of hits and next candidate characters as the narrow search result are computed are previously stored. At the time of performing the narrow search, when the number of hits is small and the numbers and the next candidates are not registered, the numbers is counted. When the number of hits and the next candidate characters are registered in the index, the narrow search results are computed by using its registration result.

Abstract: A point of interest (POI) search device includes: a static POI data storage means for storing therein a static POI data registered in advance; an added POI data storage means for storing therein an added POI data added or changed; a deleted POI data storage means for storing therein a deleted POI data for identifying a POI data which is not subjected to a search anymore, among the static POI data; a search keyword setting means; a computation switch means for computing the number of POI data matching the search keyword from among the static POI data and switching a computation processing of computing the number of POI data according to the computed number of POI data; and a POI search means for computing the number of POI data, using at least the static POI data and the added POI data according to the switched computation processing.