Power Grid Load Identification for Real-Time Voltage Stability
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Solution Overview
Problem
Existing methods for operating electrical power supply grids struggle to accurately and efficiently manage fluctuations in voltage and frequency due to variable load behavior and renewable energy integration, particularly lacking real-time responsiveness and simplicity.
Innovation Solution
A method involving power electronics devices that identify load behavior by feeding interference signals, measure electrical characteristics, and determine load sensitivity variables to influence grid parameters like voltage and frequency in real-time, using a control loop to stabilize the grid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If long-term data detection and complex mathematical evaluation methods are used to observe power supply grid behavior, then predictive control strategies can be derived, but the system complexity and computational requirements increase significantly
Solution Approach 1:
The patent extracts only the essential information needed for control by using interference signals to directly elicit load sensitivity responses, rather than processing comprehensive long-term operational data. This selective extraction approach obtains predictive control parameters through targeted measurements of load reactions to controlled disturbances, significantly reducing data processing complexity while maintaining control accuracy.
Solution Approach 2:
The patent introduces interference signals as an intermediary mechanism to mediate between the control system and the power supply grid. These signals act as probes that reveal load characteristics without requiring complex analysis of normal operational data, enabling predictive control strategy derivation through simplified signal-response measurement and evaluation.
2Reliability
If traditional load modeling approaches are used to analyze power supply grid behavior, then some control insights can be obtained, but real-time responsiveness is insufficient
Solution Approach 1:
The patent applies preliminary action by proactively injecting interference signals into the power supply grid to preemptively identify load sensitivity characteristics. This allows the system to obtain real-time load behavior information before actual disturbances occur, enabling predictive control responses that are both accurate and timely, rather than relying on retrospective analysis of normal operational data.
Solution Approach 2:
The patent employs periodic interference signal injection to continuously update load sensitivity variables in real-time. By repeatedly applying controlled disturbances at regular intervals, the system maintains current knowledge of load characteristics without requiring continuous complex data processing, thus achieving both real-time responsiveness and accurate control insights.
3Productivity
If power electronics devices inject interference signals to identify load behavior, then real-time load sensitivity can be determined, but additional control complexity is introduced
Solution Approach 1:
The patent makes power electronics devices multi-functional by enabling them to perform both their primary power conversion function and the additional function of injecting interference signals for load identification. This universal approach allows a single device to serve dual purposes, obtaining real-time load sensitivity data without requiring separate dedicated measurement systems, thus limiting the increase in overall system complexity.
Solution Approach 2:
The patent implements feedback by measuring the responses of electrical loads to injected interference signals and using these responses to determine load sensitivity variables. This closed-loop approach provides real-time information about load behavior that feeds back into control decisions, enabling rapid adaptive control while using the same power electronics infrastructure already present in the system.
Data Source
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AI summary
The invention relates to a method for operating an electrical power supply grid (1 ), comprising at least the following steps: a) carrying out identification of the load behavior of electrical loads (5), which are connected to the power supply grid (1 ), during ongoing operation of the power supply grid (1 ) by deliberately feeding in one or more interference signals by means of at least one power electronics device (7) which is connected to the power supply grid, b) measuring electrical characteristic data of loads (5) which are connected to the power supply grid (1 ), c) continuously determining at least one load sensitivity variable on the basis of the measured electrical characteristic data and the interference signals which have been fed in, d) influencing at least one operating parameter of the power supply grid (1 ) on the basis of the ascertained load sensitivity variable.