Electric Power Network Frequency Control via Predictive Simulation
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Solution Overview
Problem
In smaller and larger electrical grids, sudden load changes cause impermissible frequency deviations, leading to stability issues and potential blackouts, which are currently managed manually by technicians through generator power adjustments.
Innovation Solution
A method that predicts and adjusts the instantaneous reserve before load switching, by determining the frequency response to the current network status and sending an offset to the frequency controller, allowing generators to regulate frequency proactively, minimizing deviations and stabilizing the grid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual control methods are used to adjust generator power after load changes, then frequency deviations can be corrected, but response time is delayed and frequency stability deteriorates during the correction period
Solution Approach 1:
The system performs preliminary simulation calculations to determine the optimal switching time for loads before actual switching occurs. By predicting future network states and calculating frequency responses in advance, the system prepares compensation strategies proactively, enabling generators to begin regulation before frequency deviations become measurable, thus reducing response time while maintaining stability
2Reliability
If load switching operations are performed without prediction, then operational simplicity is maintained, but frequency deviations exceed permissible limits
Solution Approach 1:
The system introduces a simulation device as an intermediary between load switching operations and frequency control. This intermediary component predicts future network states and calculates optimal switching times, acting as a mediator that translates simple switching commands into coordinated control actions that ensure frequency compliance without requiring complex real-time control algorithms
3Duration of action of stationary object
If generators regulate frequency reactively after deviations occur, then control simplicity is maintained, but equipment stress increases and lifespan decreases
Solution Approach 1:
The system determines optimal switching times for loads in advance, before frequency deviations occur. This preliminary action allows generators to begin regulation proactively, reducing the magnitude and duration of frequency excursions, thereby decreasing stress on equipment and extending lifespan while coordinating multiple control actions through centralized simulation and optimization
Data Source
Figure 1~2
AI summary
The present invention relates to a method for frequency control of an electrical power network, characterized by the steps of: - estimating a frequency response of the electrical power network taking into account a current network state of the electrical power network and a load change by means of a simulation device, and - determining an offset frequency (9) based on the frequency response by means of an adjustment device, and - adjusting a target frequency (1) of the electrical power network based on the offset frequency (9) by means of a frequency control device, and - generating control commands for controllable generators of electrical energy by means of the frequency control device in order to set the adjusted target frequency (7) in the electrical power network, and - generating a switching command for a switching device by means of the frequency control device, wherein the switching command includes a time (t3) for a switching operation.Furthermore, a control arrangement is the subject of the invention.