AC Grid Topology Determination via Voltage-Power Dependencies
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Solution Overview
Problem
Existing methods for controlling AC power grids struggle to accurately determine the topology of grid sections, leading to inefficiencies in managing local imbalances between energy generation and consumption, which can result in voltage thresholds being exceeded and equipment overload, especially with the integration of small and medium-sized energy generation units.
Innovation Solution
A method that measures grid voltage at measurement points within a grid section and determines dependencies of voltage variations based on connection power values of energy consumption and generation units, allowing for the creation of a grid map that indicates the electric relative positions of these units, enabling optimized operation control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If global control signals are used to control all controllable energy generation and consumption units in the same way, then the control system is simple and easy to operate, but local imbalances between generation and consumption cannot be resolved, leading to voltage threshold violations and equipment overload
Solution Approach 1:
The patent divides the grid section into multiple branches with individual measurement points, creating segmented control zones. Each branch is analyzed separately to determine its specific topology and control needs, allowing localized control strategies that address local imbalances while maintaining overall system coordination.
Solution Approach 2:
The patent implements differentiated control for different branches based on their specific topology characteristics, measurement data, and local generation-consumption balances. Each branch receives tailored control signals rather than uniform global commands, enabling precise local optimization of voltage and power flow while maintaining system-wide coordination.
2Productivity
If the power of local energy generation units is increased to meet overall demand, then more electric power is supplied to the grid, but local voltage threshold values are exceeded and electric lines are overloaded
Solution Approach 1:
The patent implements dynamic control of local energy generation units based on real-time measurement data and topology information. The control system continuously adjusts generation output according to current grid conditions, allowing maximum power utilization without exceeding voltage or line capacity limits at any moment.
Solution Approach 2:
The patent uses measurement points in each branch to continuously monitor voltage and power flow conditions. This feedback information is used to adjust the operation of local energy generation units, ensuring that power output is optimized while preventing voltage threshold violations and equipment overload through real-time condition-based control.
3Measurement precision
If the topology of the entire AC power grid is exactly known to achieve precise control, then optimized operation control can be implemented, but the complexity of topology determination and data collection increases significantly
Solution Approach 1:
The patent determines topology separately for each branch rather than attempting to map the entire grid at once. Each branch is analyzed independently using measurements from its specific measurement point, reducing the complexity of data collection and processing while achieving sufficient precision for localized control decisions.
Solution Approach 2:
The patent focuses topology determination efforts on the specific branches and measurement points relevant to current control needs, rather than comprehensively mapping the entire grid. This partial approach provides sufficient information for optimized control of controllable units without the excessive complexity of complete grid topology determination.
Data Source
AI summary
For determining the topology of a grid section of an AC power grid, the grid section comprising a grid connection point, at least one branch branching off from the grid connection point and including a plurality of energy consumption and/or energy generation units, and at least one measurement point in the at least one branch, dependencies of variations of a grid voltage measured at the at least one measurement point based on variations of connection power values of at least some individual ones of the energy consumption and/or energy generation units are determined.