Power System Component Emulation for Stable Hardware-in-the-Loop Testing
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Solution Overview
Problem
Existing power system emulators face challenges with scalability, flexibility, and numerical stability, particularly when dealing with multi-timescale models and power electronics-based converters, which limit their ability to provide realistic and accurate testing of power system components.
Innovation Solution
The use of power electronics converter-based emulators that exchange data with actual power system components, allowing for hardware-in-the-loop testing and emulation of power systems, including components like generators, loads, and transmission lines, using interconnected power amplifier and converter circuits to mimic real-world conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If digital simulators are used for power system emulation, then cost is reduced and reconfigurability is improved, but numerical stability and convergence issues occur and multi-timescale models are difficult to handle
Solution Approach 1:
The system divides the power system emulation into multiple independent component emulators, each handling specific power system components. This segmentation allows digital simulators to be used for individual components where numerical stability is easier to maintain, while improving overall reconfigurability through modular assembly of component emulators.
Solution Approach 2:
Analog hardware emulators serve as intermediaries between digital simulators and the physical power system components. The analog hardware layer handles multi-timescale dynamics and provides numerical stability, while digital simulators provide reconfigurability and cost benefits, combining the advantages of both approaches.
2Reliability
If analog hardware-based emulators are used, then realism is improved and actual communication and sensors are enabled, but the system becomes bulky and inflexible and model fidelity issues occur when scaled
Solution Approach 1:
The analog hardware emulator is divided into multiple independent component emulators, each handling specific power system components. This segmentation makes the overall system more compact and flexible while maintaining the realism benefits of analog hardware for each individual component.
Solution Approach 2:
Each component emulator is designed to be a universal module that can emulate different types of power system components through software configuration. This multi-functionality provides flexibility and scalability without requiring separate dedicated hardware for each component type.
3Adaptability or versatility
If power electronics-based converters are used in emulators, then flexibility is improved and realistic behavior comparison is enhanced, but scalability is limited
Solution Approach 1:
The power system emulator is segmented into multiple independent component emulators that can be scaled independently. Each component emulator uses power electronics-based converters to maintain flexibility and realistic behavior, while the modular architecture enables systematic scaling to larger systems.
Solution Approach 2:
Component emulators are designed as nested modular units that can be combined to form larger power system emulations. This nesting approach allows scalable system construction where smaller emulator units are combined to create increasingly complex power system representations while maintaining flexibility at each level.
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 approach enhances test fidelity, reduces numerical stability issues, and provides scalable and flexible testing of power system components under various operating conditions, offering a more realistic and accurate representation of power system behavior.
Implementation Method 1
a power amplifier circuit configured to be coupled to the component and to exchange data with the component
Implementation Method 2
The component emulator may include at least one power electronics converter circuit
Data Source
AI summary
An apparatus for testing components for use in a power system includes at least one power amplifier circuit configured to be coupled to the component and a control circuit configured to operate the power amplifier circuit responsive to at least one state of a component emulator for the component included in a system emulator for the power system. The component emulator may include at least one power electronics converter circuit and the control circuit may be configured to control at least one of a voltage and a current of the at least one power amplifier circuit responsive to at least one of a voltage and a current of the at least one power electronics converter circuit. The control circuit may be further configured to control the component emulator responsive to at least one state of the at least one power amplifier circuit.