ARTEMIS

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Variable-step accuracy with fixed-step performance

It is a fundamental constraint of real-time simulation that the model must use fixed-step integration solvers. In stiff systems like power electrical circuits, the traditional approach is to use a variable step solver for resolving the high-frequency components in the behavior of the system. Because the time to solve at each timestep is non-deterministic, these solvers have to be replaced with fixed-step solvers, which introduce errors into the solution.

ARTEMIS introduces innovative fixed-step solvers and efficient computational techniques that dramatically improve the computational performance of SimPowerSystems, to allow you to develop real-time simulations with your power systems models.

Because these are deterministic fixed step algorithms, you can create robust, accurate real-time simulations of your power system at significantly higher performance than with SimPowerSystems without ARTEMIS. In fact, it has been shown that simulations can be as much as 15 times faster than those done using the standard fixed-time-step methods, without the inherent errors associated with these solvers.

More power for less cost

The new solvers introduced by the ARTEMIS are proven to be highly accurate and stable over much larger time steps than with the Trapezoidal fixed-time-step algorithms used by Simulink. Users can therefore get the same accuracy with less powerful and lower-cost systems, to give the performance needed for high-fidelity real-time simulation.

Optimized solvers for real-time simulation of power electrical circuits

Furthermore, ARTEMIS includes special power-circuit-specific algorithms for addressing typical problems encountered when converting your SimPowerSystems model to real-time. For example, for circuits with switches, ARTEMIS calculates all circuit topology matrices prior to running the simulation, and uses circuit decoupling methods to reduce the size and number of these matrices, so that the computation runs smoothly in real-time, even when a switch changes state. Similarly, strategies to avoid algebraic loops and non-deterministic iterative calculations are included. These allow fixed computation times per step and interruption-free simulation in real-time.

Create distributed real-time simulations on PC clusters with RT-LAB

ARTEMIS integrates fully into the Simulink environment in the form of a Simulink blockset, and is fully compatible with Real-Time Workshop (RTW) for real-time execution, or for simply accelerating the model.

ARTEMIS optimizes RT-LAB, allowing you to automatically convert your SimPowerSystems schematics into real-time simulations. This allows the distribution of a large, complex power systems model over several processors, in order to get the computational power required to achieve high-performance, real-time execution on low-cost, off-the-shelf PCs and non-proprietary hardware.