Power Flow Visualization Using Opacity Encoding

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Solution Overview

Problem

Current visualization methods for power flow in power networks, such as animated arrows, clutter the display and are not scalable, making it difficult for operators to quickly understand and manage large power networks.

Innovation Solution

A method using geometrical lines with varying opacity to represent power flow, eliminating the need for arrows and reducing clutter, allowing for the visualization of hundreds of power lines without overwhelming the operator, and incorporating additional features like time-based opacity and line width to represent capacity and load percentage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If animated arrows are used to represent power flow, then the transmission flow can be visualized, but the display becomes cluttered and difficult to read

Engineering Contradiction:
Improvepower flow visualizationVSAvoiddisplay clutter
Core Design Contradiction:
Loss of informationVSObject-affected harmful factors

Solution Approach 1:

The patent applies color changes and opacity variations to represent power flow characteristics. Different colors indicate different flow directions (e.g., red for forward flow, blue for reverse flow), while varying opacity levels represent different flow magnitudes. This allows multiple power lines to be displayed simultaneously without clutter, as each line's state is encoded through color and transparency rather than using physical arrow graphics that occupy screen space and overlap.

Inventive Principle:
Principle #32Color changes

2Loss of information

If multiple arrows are displayed to show power flow in hundreds of power lines, then comprehensive monitoring is achieved, but the operator gets lost in details and the overview becomes overwhelming

Engineering Contradiction:
Improvecomprehensive power flow monitoringVSAvoidoperator overview capability
Core Design Contradiction:
Loss of informationVSEase of operation

Solution Approach 1:

The patent transforms the visualization from displaying individual arrow graphics to displaying parameter-encoded line representations. Power flow magnitude is represented by opacity changes, direction by color changes, and presence by line visibility. This parameter-based encoding allows hundreds of power lines to be monitored simultaneously in an overview picture without creating visual clutter, as the information is conveyed through subtle visual variations rather than prominent graphical elements that compete for attention.

Inventive Principle:
Principle #35Parameter changes

3Loss of information

If arrow size is varied to indicate transmission flow amount, then flow magnitude is visualized, but the arrows become even more visually disturbing and clutter the overview picture

Engineering Contradiction:
Improvetransmission flow magnitudeVSAvoidvisual disturbance
Core Design Contradiction:
Loss of informationVSObject-affected harmful factors

Solution Approach 1:

Instead of varying arrow size to indicate flow magnitude, the patent uses opacity changes of the power line representation itself. The line remains at a consistent, non-intrusive thickness, but its transparency varies to encode the flow amount. This eliminates the visual disturbance caused by large, prominent arrows while still conveying the magnitude information effectively through the opacity parameter.

Inventive Principle:
Principle #32Color changes

Data Source

PatentUS8970600B2Method for visualization of transmission flow in a system, an operator terminal and a supervisory control system
Publication Date: 2015.03.03 HITACHI ENERGY LTD
  • US8970600B2 patent drawing
  • US8970600B2 patent drawing
  • US8970600B2 patent drawing

AI summary

A method for visualizing on a display unit of an operator terminal a transmission flow in a system. The method includes: retrieving a starting point and an end point of the transmission flow; generating a picture wherein a geometrical line from the starting point to the end point graphically represents the transmission flow and wherein a direction of the transmission flow is graphically represented by a continuously increased opacity of the geometrical line between the starting point and the end point of the transmission flow; and outputting the picture on the display unit.