Grid Frequency Control Using Predictive Power Stabilisation

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Solution Overview

Problem

Existing electricity grids face instability due to frequency fluctuations outside the safe frequency range, which can damage generators or consumer equipment, necessitating real-time frequency adjustment to ensure safe operation.

Innovation Solution

A grid stabilisation network comprising load and supply devices, controlled by a frequency reader and control device, adjusts power consumption or supply to stabilize the grid frequency by altering collective operation power in response to frequency measurements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If real-time frequency adjustment is implemented to maintain grid stability, then grid safety and reliability are improved, but system complexity and response time requirements increase

Engineering Contradiction:

Improvegrid stabilityVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system performs preliminary actions by predicting future frequency deviations before they occur. The control device calculates predicted future frequency based on current frequency and its time derivative, then proactively adjusts power consumption/supply to prevent frequency excursions outside the normal operating band, rather than merely reacting to deviations after they occur.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements dynamic adjustment of power consumption and supply based on real-time frequency conditions. The control device continuously monitors frequency, calculates its time derivative, and dynamically modifies the operational state of load and supply devices to maintain frequency within the normal operating band, adapting to changing grid conditions.

Inventive Principle:

Principle #15Dynamics

2Reliability

If frequency adjustment is performed outside the normal operating frequency band, then grid safety is improved, but the need for rapid response increases system operational demands

Engineering Contradiction:

Improvegrid safetyVSAvoidresponse speed

Core Design Contradiction:

ReliabilityVSSpeed

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements continuous feedback by monitoring actual frequency deviations and comparing them with predicted values. The control device uses the time derivative of frequency and the frequency difference from the reference value to dynamically adjust power consumption and supply, creating a closed-loop control system that responds to changing conditions in real-time.

Inventive Principle:

Principle #23Feedback

3Stability of the object's composition

If collective operation power of stabilisation devices is altered to counteract frequency fluctuations, then frequency stability is improved, but energy consumption and system control complexity increase

Engineering Contradiction:

Improvefrequency stabilityVSAvoidenergy consumption

Core Design Contradiction:

Stability of the object's compositionVSUse of energy by stationary object

Solution Approach 1:

The system applies partial action by adjusting the collective operation power of stabilisation devices only to the extent necessary to maintain frequency within the normal operating band. The control device calculates the precise frequency difference from the reference value and applies proportional adjustments to power consumption and supply, avoiding excessive energy consumption while maintaining adequate frequency stability.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS20250343417A1Methods and systems for providing stability to an electricity grid

Publication Date: 2025.11.06 FIRMUS TECH PTY LTD

AI summary

Embodiments generally relate to a computer-implemented method for adjusting an operation frequency of an electricity grid, the electricity grid electrically connecting to at least one grid stabilisation device. The method comprises, at a control device, obtaining from a frequency reader connected to the electricity grid the operation frequency of the electricity grid during an adjustment interval; determining a time derivative of the obtained operation frequency; determining a predicted future operation frequency based on the obtained operation frequency and the time derivative; determining a frequency difference between the predicted future operation frequency and a reference operation frequency; and instructing the at least one grid stabilisation device to change its collective operation power to adjust the operation frequency of the electricity grid.