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43 results about "Grid reference" patented technology

Grid references define locations in maps using Cartesian coordinates. Grid lines on maps define the coordinate system, and are numbered to provide a unique reference to each location on the map. This reference is normally based on projected eastings and northings.

Method for automatically generating IED network graph

The invention relates to a method for generating an IED network graph. The method comprises the following steps that first, a network topology is generated, wherein the network topology of an IED equipment layout object is generated according to sub-network entries corresponding to communication entries in model data; second, automatic layout is carried out, wherein IED equipment which is directly connected with a subnet is allocated first, and then grouping layout is conducted within a subnet range until the overall network layout is completed; third, grid wiring is carried out, wherein a grid reference line is set according to all graphics primitives which are completed in the second step in a layout mode, grid line cross points are traversed in all directions, and finally a connecting line path of the graphics primitives is achieved; fourth, layout examination is carried out, the layout is completed when no intersection exists, and secondary line connection is performed according to the connecting line crossed condition when intersection exists; fifth, an IED network is generated automatically, and the network graph is output. By the adoption of the method, the defect of a single algorithm is overcome, a more efficient algorithm with a reasonable logical layout can be developed according to a network graph model, the method can be adapted to different data model demands, network topology data modeling is facilitated, and the generated IED network graph is clear in line.
Owner:STATE GRID CORP OF CHINA +2

Shipway hull digital positioning auxiliary tool and use method thereof

ActiveCN110525606AImprove the efficiency of loading and positioningEfficient and precise loading and positioningDry-dockingSlipwaysGrid referenceEngineering
The invention discloses a shipway hull digital positioning auxiliary tool and a use method thereof. The auxiliary tool comprises a chassis, a supporting pipe, a thread bushing, a vertical threaded column, a clamping groove, a clamping groove built-in block, a fixed seat and a rotary target. The supporting pipe and the chassis are fixedly connected, the thread bushing and the supporting pipe are fixedly connected, the vertical threaded column and the thread bushing are in threaded connection, the clamping groove is formed in the top end of the vertical thread bushing, the clamping groove built-in block is arranged in the clamping groove, four threaded holes are formed in the clamping groove in the circumferential direction, a front threaded column, a rear threaded column, a left threaded column and a right threaded column are in threaded connection with the threaded holes separately, the bottom end of the fixed seat is fixedly connected with the top end of the clamping groove built-in block, and the bottom end of the rotary target is fixedly connected with the fixed seat. Auxiliary tools are arranged on the two sides of a shipway, by means of three-dimensional adjustment of the rotary target, shipway grid reference lines are converted into three-dimensional coordinates of the rotary target, efficient and precise digital hull carrying positioning is achieved, and the use processis convenient and precise.
Owner:SHANGHAI JIANGNAN CHANGXING SHIPBUILDING

Self-adaptive grid VRS generation and service method

ActiveCN110501733AGuaranteed accuracy of VRS observationsEnsure consistencySatellite radio beaconingDouble differenceGrid reference
The invention discloses a self-adaptive grid VRS (virtual reference signal) generation and service method. The method comprises the following steps: reading coordinate information of a whole grid reference station, and respectively generating grid points covering the whole reference station grid in the east direction and the north direction at equal intervals to obtain coordinates of all grid points; reading double-difference error correction number information between whole network reference stations of one epoch, and calculating double-difference error correction numbers of visual satellitesof all grid points; determining the differences of double-difference error correction numbers of different grid points, and marking invalid grid points to obtain irregular grid points of the epoch; determining the number of grid point user requests, marking grid points in the service, and providing a grid point VRS serviceof the epoch; and repeating the above steps till completion of processing of all epochs. The grid points are adaptively generated in real time, and the calculation amount of the CORS system and the user service precision are both considered; and the grid point VRS is dynamically generated according to the user request, so that the calculation amount of the CORS system is greatly reduced.
Owner:WUHAN PANDASHIKONG SCI & TECH

High voltage ride-through control method and device for converter and storage medium

ActiveCN109449996AMeet the no-load test requirementsReducing the need for impedance dropSingle network parallel feeding arrangementsWind energy generationPower gridGrid reference
The invention discloses a high voltage ride-through control method and device for a converter and a storage medium. The high voltage ride-through control method comprises the following steps: determining a current working state of the converter; if the current working state of the converter satisfies a preset high voltage ride-through condition, calculating a grid reference voltage according to acurrent grid voltage; calculating a reactive current given reference value according to the grid reference voltage and supplying inductive reactive current for the converter based on the reactive current given reference value; calculating a DC bus voltage given reference value according to the reactive current given value, the active current of the converter and the grid reference voltage, and regulating the DC bus voltage based on the DC bus voltage given reference value so that the port voltage of the converter meets the high voltage ride-through requirement. By adoption of the technical scheme in the embodiment of the invention, the loading test requirement for high voltage ride-through can be met, and the loading voltage of a wind power generator set is ensured not to be lower than a preset high ride-through voltage per-unit value.
Owner:BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD

Regional power grid reference risk online acquisition method and system

The invention discloses a regional power grid reference risk online obtaining method. The method comprises the steps of obtaining a power flow result before an equipment fault; obtaining a power flowresult after equipment failure; calling a healing program to judge whether the DAT file is converged or not; comparing the power flow result before the equipment fault with the power flow result afterthe equipment fault, obtaining an accident event level result, and achieving the online obtaining of a power grid reference risk; meanwhile, the invention discloses a regional power grid reference risk on-line acquisition system, and the system comprises an acquisition module which is used for acquiring a power flow result before an equipment fault and a power flow result after the equipment fault; a calling module which is used for calling a healing program for judgment; and a conversion and extraction module which is used for obtaining and converting the accident event grade into a series of accident event grade results according to the accident event grade criterion, and extracting the maximum value of the accident event grade results as the final accident event grade of the risk, so that the online obtaining of the power grid reference risk is realized, and the purpose of risk early warning is achieved.
Owner:GUIZHOU POWER GRID CO LTD

Art painting view framing proportion perspective shape correcting device

The invention provides an art painting view framing proportion perspective shape correcting device. According to the shape correcting device, an image of a far scene is selected through a viewing frame, then the image is displayed on a view framing board, and a painter analyzes the scene displayed on the view framing board according to grid reference lines defined by first reference lines and second reference lines, so that the observation of the scene is facilitated, the range of view framing can be adjusted, the range of painting can be accurately found and positioned, when painting is carried out, the size and the proportion can be accurately mastered, the fast improvement of painting skills is realized, and The long-standing problems that framing is difficult, shape distinguishing is difficult, draft modifying is difficult, comprehending of proportion and perspective relation is difficult are effectively solved; and in addition, the device has the advantages of being reasonable indesign, simple in structure, convenient to use and the like, helps students to master the relation and the proportion of the scene in all directions, meets the requirement of a painter for understanding the near-far scene relation and proportion, and helps the painter to accurately locate the frame and the proportion of painting.
Owner:HEILONGJIANG UNIV OF TECH
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