Grid Responsive Control Device for Frequency Stabilization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current power grid management systems face challenges in maintaining frequency stability, leading to potential blackouts and inefficient energy distribution due to the lack of effective demand-side response mechanisms, which result in frequent load shedding and increased energy costs.
Innovation Solution
A control device and method that sense grid frequency and load energy storage levels to adjust energy consumption dynamically, using a central frequency based on historical data and randomization to prevent synchronized load changes, thereby stabilizing the grid and reducing switching rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If demand-side response mechanisms are implemented to balance generation and load, then grid frequency stability is improved, but device complexity increases
Solution Approach 1:
The control device automatically senses grid frequency and load energy storage levels, then autonomously adjusts energy consumption without requiring external control signals or complex coordination systems. This self-service approach improves grid stability while avoiding the complexity of centralized control architecture.
Solution Approach 2:
The control device continuously senses grid frequency and load energy storage levels, using this feedback information to dynamically adjust energy consumption. This closed-loop feedback mechanism enables automatic frequency stabilization without requiring complex external control systems.
2Reliability
If load shedding is used to prevent total collapse during extreme low-frequency conditions, then system stability is maintained, but user convenience deteriorates
Solution Approach 1:
The control device proactively adjusts energy consumption in response to frequency deviations before the system reaches critical collapse conditions. By taking preliminary action during moderate frequency deviations, the device prevents the need for extreme load shedding that would disrupt users.
Solution Approach 2:
The control device automatically manages energy consumption adjustments without requiring user intervention or awareness. This self-service operation maintains system stability while keeping users unaware of the control actions, thus preserving user convenience.
3Reliability
If generators are operated below capacity to cope with potential contingencies, then system reliability is improved, but energy efficiency deteriorates
Solution Approach 1:
Instead of reducing generation capacity to maintain reliability, the invention inverts the approach by having loads actively reduce their energy consumption in response to grid conditions. This shifts the reliability burden from the generation side to the demand side, allowing generators to operate at full capacity while maintaining system reliability.
Solution Approach 2:
The control device dynamically changes the energy consumption parameter of loads based on sensed grid frequency and load energy storage levels. This parameter adjustment enables the system to maintain reliability through demand modulation rather than reducing generation capacity.
4Reliability
If randomization is used to prevent synchronized load changes, then grid stability is improved, but control precision deteriorates
Solution Approach 1:
The control device applies partial randomization to the trigger values rather than complete randomization. This partial action approach provides enough variability to prevent synchronized load changes across the grid, while maintaining sufficient control precision through the underlying sensing and adjustment mechanisms.
Data Source
Figure 1A~1B
Figure 1C~2
Figure 3A
AI summary
A control device for controlling an energy consumption of a load operably connected to an electricity grid, characterized in that said control device comprises: means for sensing a value of a physical variable of the grid, said physical variable varying depending upon a relationship between electricity generation and a loading on the grid; means for sensing a value of a physical variable of the load, said physical variable of the load being representative of energy stored by the load; means for varying an energy consumption of said load when a value of said physical variable of the grid reaches a trigger value; and means for determining the trigger value, said determining of the trigger value being dependent upon said sensed physical variable of the load.