Power transmission network state visualization

• US 9,336,616 B2
• Filed: 09/04/2013
• Issued: 05/10/2016
• Est. Priority Date: 09/04/2012
• Status: Active Grant

• Current Assignee: Hitachi Energy Limited (Hitachi, Ltd.)
• Original Assignee: ABB Research Ltd. (ABB Limited)
• Inventors: Naef, Martin, Larsson, Mats
• Primary Examiner(s): Hoang, Peter
• Application Number:
  US14/017,832
• Publication Number:
  US 20140139528A1
• Time in Patent Office: 979 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G06T 11/206 Drawing of charts or graphs
• CPC Class Codes: G06T 11/40 Filling a planar surface by adding surface attributes, e.g. colour or texture
• CPC Class Codes: H02J 13/00001 characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
• CPC Class Codes: H02J 13/00034 the elements or equipment being or involving an electric power substation
• CPC Class Codes: Y04S 10/40 Display of information, e.g. of data or controls

Abstract

A method and system are provided for visualizing and displaying a state of a power transmission network to an operator, for the supervision of the network. The method and system are provided for visualizing or contouring a power transmission network state by displaying to an operator output data values interpolated at output data locations from input data including geographically distributed input data sensor locations and corresponding dynamically updated input data values. The method includes dividing a geographical area of interest into triangles, wherein a triangle vertex is defined at each input data location within the area, determining, for each triangle, closest input data locations according to a closeness criteria, and interpolating by weighting or scaling at each output data location within a triangle the input data values of a number of closest input data locations to generate output data values corresponding to the output data locations.

Claims

1. A system for visualization of a power transmission network state by displaying output data values interpolated at output data locations from input data including input data locations and corresponding input data values, the system comprising:

triangulation means for dividing a geographical area of interest into triangles, wherein a triangle vertex is defined at each input data location within the area, and for determining, for each triangle, closest input data locations according to a closeness criteria; and

programmable graphics hardware configured to interpolate, for each output data location within a triangle the input data values of a number N of closest input data locations of the triangle to generate output data values corresponding to the output data locations.

2. The system of claim 1, wherein the triangulation means is configured to generate an input data structure including, for each triangle, a list of indices of the closest input data locations, and wherein the programmable graphics hardware further being adapted to identify the N closest input data locations of the triangle from the input data structure.

3. The system of claim 1, wherein the programmable graphics hardware is configured to generate a two-dimensional output pattern based on output data locations and interpolated output data values, and wherein the system comprises an optical output device for displaying the two-dimensional output pattern to an operator.

4. The system according to claim 2, wherein the programmable graphics hardware is configured to sort the list of indices of the closest input data locations according to the closeness criteria and interpolate the input data values corresponding to the first N indices of the sorted list of indices.

5. The system according to claim 1, wherein the triangulation means is configured to provide a confidence level for each input data value and interpolate a predefined number N of input data values with a preset minimum confidence level.

6. The system according to claim 1, wherein the triangulation means is configured to define triangle vertices at virtual data locations different from the input data locations.