Supply Network Emulation With Feedback for Stability Validation
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Solution Overview
Problem
Existing methods for validating electrical components in complex supply networks fail to accurately simulate the interactions and feedbacks within these networks, leading to instability issues due to their assumption of a rigid network structure, which is not representative of real-world scenarios.
Innovation Solution
A device that emulates a supply network by providing a frequency-dependent impedance model and amplifying current/voltage signals to simulate realistic conditions, allowing for the validation of components under various network scenarios, including frequency-dependent impedances and admittances, using a combination of real-time simulation and power amplification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If classical network emulators are used to represent an ideal voltage source with arbitrary waveforms, then the emulation of voltage fluctuations, harmonics, and short circuits is achieved, but the assumption of a rigid power grid prevents replication of instabilities resulting from feedback between the emulator and the component under test
Solution Approach 1:
The patent implements a feedback mechanism where the output current and voltage of the power amplifier are measured and fed back into the real-time simulation. This creates a closed-loop system that allows the emulator to replicate the interactive feedback between power grid components and the device under test, enabling accurate stability validation while maintaining versatility in emulating various grid conditions.
2Reliability
If power hardware-in-the-loop setups with real-time simulation and power amplifiers are used, then realistic power grid conditions with feedback can be simulated, but the complexity and cost of developing suitable network models increases significantly
Solution Approach 1:
The patent employs a dynamic small-signal network model that can be automatically generated from a nominal operating point. The model uses dynamic equations that adapt to different operating conditions, allowing the system to maintain accuracy across various grid scenarios without requiring manual reconfiguration. This dynamic approach reduces model development complexity while preserving validation reliability.
3Measurement precision
If frequency-dependent impedance models are implemented in real-time simulation, then accurate representation of supply network behavior is achieved, but the computational load and simulation complexity increase
Solution Approach 1:
The patent represents frequency-dependent impedance using a rational function with adjustable poles and zeros. By optimizing the placement of these poles and zeros, the model achieves high accuracy in representing supply network impedance across a wide frequency range while maintaining a compact mathematical form that is computationally efficient for real-time simulation. This parameter optimization approach balances precision with simulation complexity.
Data Source
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AI summary
The invention relates to an apparatus (1) for emulating a supply network for validating components (DUT) of a power supply system, having • means (RT) for providing a current/voltage signal according to a frequency-dependent impedance of a predefinable supply network, • means (PA) for amplifying the current/voltage signal provided, • means (SI) for measuring the current which flows from the apparatus into the connected component (DUT), and • means (SU) for measuring the voltage which is effectively applied to the connected component (DUT).