CVT-Linked Generator Rotors for Fast Power Grid Stabilization
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Solution Overview
Problem
The intermittency of renewable energy sources and fluctuating power consumption pose challenges for maintaining grid stability, as baseload generating sources like coal-fired steam plants are inefficient when adjusting steam parameters to regulate power output, leading to increased costs and carbon footprints, and traditional plants are being decommissioned due to inefficiencies.
Innovation Solution
A power grid stabilization system utilizing two generators mechanically linked via continuous variable transmissions, where one generator is connected to a turbine and the power grid, and the other, potentially decommissioned, generator stores or provides mechanical energy through the CVT to maintain optimal efficiency and adjust power output quickly in response to grid demands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If baseload generating sources adjust steam parameters to regulate power output, then power output can be changed to match grid demand, but efficiency decreases and operating costs increase
Solution Approach 1:
The system divides the power generation function into two separate generators: one dedicated to baseload operation at optimal efficiency, and another dedicated to rapid power adjustment. This segmentation allows each generator to specialize in its optimal operating mode, preventing efficiency losses while maintaining adaptability to grid demand changes.
Solution Approach 2:
A mechanical coupling device (such as a common shaft or flywheel system) acts as an intermediary between the two generators, allowing mechanical energy to be transferred from the baseload generator to the adjustment generator. This intermediary enables power regulation without requiring the baseload generator to change its steam parameters, thus maintaining efficiency.
2Reliability
If backup gas turbines are activated to meet sudden power demand increases, then grid stability can be maintained, but response time is delayed up to 30 seconds
Solution Approach 1:
The system maintains a second generator in a pre-positioned, ready-to-operate state with all systems primed and personnel prepared. This preliminary preparation eliminates the 30-second activation delay associated with starting backup gas turbines, as the second generator can immediately begin power production when needed.
Solution Approach 2:
The system replaces the thermal-mechanical startup process of gas turbines with a mechanically-coupled generator system that can transfer power instantly through mechanical energy storage or direct coupling, eliminating combustion delays and achieving immediate response to grid disturbances.
3Loss of energy
If traditional power plants are decommissioned due to inefficiency, then operational costs and carbon footprint are reduced, but expensive and difficult decommissioning processes are required
Solution Approach 1:
The second generator is designed to serve multiple functions: it can provide rapid power adjustment, serve as backup capacity, and potentially be repurposed for different applications. This multi-functionality increases the value of retaining the equipment, making decommissioning less necessary and reducing associated complexities.
Solution Approach 2:
Instead of decommissioning, the system changes the operational parameters of the second generator, transitioning it from a backup unit subject to lengthy startup procedures to an actively-integrated unit with immediate response capability through mechanical coupling, thereby eliminating the need for decommissioning.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This system allows for fast and efficient power adjustments without reducing the efficiency of baseload generating sources, utilizing existing components to stabilize the grid and reduce the need for decommissioning traditional power plants, thereby minimizing costs and environmental impact.
Implementation Method 1
mechanical energy is transferred from the rotor of the generator to the rotors of the additional generators via the continuously variable transmissions. The transferred energy is stored as mechanically energy in the rotating rotors of the additional generators
Implementation Method 2
at least one generator connected to a turbine and configured to convert mechanical energy from the turbine into electrical energy
Data Source
AI summary
A system and method for compensating for the changing power requirements of an electrical grid. A first generator is mechanically linked to a turbine and electrically linked to a power grid, such that the generator converts rotational energy into electrical energy to supply the power grid. The rotor of the generator is mechanically linked to the rotor of one or more additional generators, not connected to a turbine or the grid, via a continuously variable transmission. The turbine is maintained at optimal running speed. When the generator produces more electrical energy than required by the power grid, mechanical energy from the rotor is transmitted to the rotors of the additional generators. When the power grid requires more energy than generator produces, as the turbine runs at optimal efficiency, mechanical energy from the rotors of the additional generators is transmitted to the rotors of the first generator.