Clutched Flywheel Inertia Assembly for Flexible Grid Support
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Solution Overview
Problem
Existing power systems require separate facilities for power generation and synchronous condenser functions, and their inertia assemblies are not easily adaptable to changing grid needs due to fixed turbine configurations.
Innovation Solution
A power system with a turbine, generator, and inertia assembly, featuring a clutch assembly that can transition between power generation and synchronous condenser modes by coupling and decoupling the turbine and flywheel shafts with the generator shaft, allowing for flexible operation in different inertia modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If turbines are fixed to the rotor shaft, then the power generation system operates reliably, but the system cannot be easily reconfigured for synchronous condenser mode
Solution Approach 1:
The power system is segmented into distinct functional modules: turbine assembly, generator assembly, and inertia assembly, each connected through detachable clutch assemblies. This segmentation allows independent operation of each module and enables transition between power generation mode and synchronous condenser mode by selectively engaging or disengaging specific clutch assemblies.
Solution Approach 2:
The clutch assemblies provide dynamic reconfigurability to the system, allowing transition between fixed and flexible operational states. By controlling the engagement state of the first clutch assembly (turbine to generator) and second clutch assembly (inertia to generator), the system can dynamically switch between different operational modes without physical reconfiguration.
2Reliability
If separate facilities are used for power generation and synchronous condenser functions, then each function operates independently and reliably, but the overall system complexity and cost increase
Solution Approach 1:
The generator assembly is designed as a universal component that can perform both power generation and synchronous condenser functions. By controlling the engagement of the turbine and inertia assemblies through clutch mechanisms, the same generator can operate in different modes, eliminating the need for separate dedicated facilities for each function.
Solution Approach 2:
The power system merges the turbine assembly, generator assembly, and inertia assembly into a single integrated system. The first and second clutch assemblies enable selective combination of these components, allowing the system to function as either a power generation plant or a synchronous condenser plant using the same physical infrastructure.
3Stability of the object's composition
If the inertia assembly is permanently coupled to the generator shaft, then the system provides consistent inertia support, but the system cannot adapt to different grid needs requiring different inertia levels
Solution Approach 1:
The connection between the inertia assembly and generator shaft is made dynamic through the second clutch assembly. This clutch can be engaged to provide inertia support or disengaged to reduce inertia, allowing the system to adapt its inertia characteristics based on grid requirements while maintaining a consistent physical infrastructure.
4Reliability
If dedicated separate generators are used for power generation and synchronous condenser systems, then each system is optimized for its specific function, but the overall system cost and space requirements increase
Solution Approach 1:
The generator assembly serves as a multi-functional unit capable of operating in both power generation mode and synchronous condenser mode. The turbine assembly provides mechanical power for generation mode, while the inertia assembly provides rotational mass for condenser mode, allowing a single generator to replace what would traditionally require two separate generators.
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
Enables efficient operation in various modes to meet grid demands, providing increased inertia without separate dedicated units, reducing costs and enhancing system flexibility and efficiency.
Implementation Method 1
an inertia assembly including a flywheel coupled to the generator shaft
Implementation Method 2
an inertia assembly including a flywheel coupled to the generator shaft
Implementation Method 3
a clutch assembly for coupling the turbine shaft to the generator shaft
Data Source
AI summary
A power system includes a turbine assembly including a turbine and a turbine shaft, a generator assembly including a generator and a generator shaft, an inertia assembly including a flywheel coupled to the generator shaft, and a clutch assembly for coupling the turbine shaft to the generator shaft. The clutch assembly is transitionable between a closed state, in which the turbine shaft is coupled to the generator shaft, and an open state, in which the turbine shaft is decoupled from the generator shaft. The power system is operable in a power generation mode when the clutch assembly is in the closed state and a synchronous condenser mode when the clutch assembly is in the open state.