Real-Time Switch Simulation With Resonator Leakage Suppression
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Solution Overview
Problem
Real-time simulators face challenges in accurately simulating electrical circuits with high fidelity and low latency, particularly due to spurious leakage currents and oscillations, which affect the simulation of complex circuits with switches and AC sources.
Innovation Solution
The method employs an open-position controller with a resonator to control current or voltage sources, minimizing computing power while suppressing residual currents and oscillations, using discrete-time solvers and filters to maintain high fidelity and low latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional switch modeling is used in real-time simulation, then computing speed is maintained, but spurious leakage currents and oscillations occur reducing simulation fidelity
Solution Approach 1:
The patent changes the modeling parameters of the switch by introducing a time-varying resistance model that transitions between high resistance (open position) and low resistance (closed position) states. This parameter-based modeling approach eliminates spurious leakage currents and oscillations while maintaining real-time computing speed, resolving the contradiction between simulation fidelity and computing speed.
Solution Approach 2:
The patent uses a simplified switch model with time-varying resistance that is computationally inexpensive compared to detailed physical models. This simplified model provides sufficient accuracy for real-time simulation without requiring complex calculations, effectively trading detailed physical accuracy for computational efficiency while eliminating numerical artifacts.
2Measurement precision
If detailed switch models are used to reduce leakage currents, then simulation accuracy improves, but computational complexity increases
Solution Approach 1:
The patent achieves high measurement precision for current accuracy by using a time-varying resistance parameter that accurately captures the switch's electrical behavior. Instead of complex multi-parameter models, this single time-varying parameter provides sufficient accuracy while keeping the model simple and computationally efficient.
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 enables accurate real-time simulation of electrical circuits with minimal computing power, effectively suppressing spurious leakage currents and oscillations, allowing for efficient testing of external devices under realistic conditions.
Implementation Method 1
The implemented resonator turned out to be efficient in suppressing residual alternating currents or voltages in the electrical circuit resulting from the AC source
Data Source
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AI summary
The method is a computer-implemented method for simulating an electrical circuit, wherein the electrical circuit comprises at least one switch (S) and at least one AC source (ACS). The at least one switch is able to attain an open position and a closed position. In the method, the at least one switch is modeled by an equivalent circuit comprising a fixed-value resistor (R) and at least one of a controlled current source (J) or a controlled voltage source (V). In the method, the open position is simulated by means of an open-position controller (OPC), wherein the open-position controller is configured to control the current or voltage source. The open-position controller thereby comprises a resonator (RES). The method comprises a step of determining a current (i, ia, ib, ic) or voltage (vL) of the electrical circuit depending on the position of the at least one switch.