Comparison between ARTEMIS 5th order Integration method used with the eMEGAsim Simulation Platform and the classical TUSTIN 2nd order method used in PSCAD and SimPowerSystems software

Publication date : Jul 2010
Paper File : TR10-30202-AR-1 eMEGAsim_vs_PSCAD_circuit_RLC_.pdf



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Abstract

Real-time simulation requires the use of fixed step integration methods, capable of achieving accuracy with a time step range larger than 10 μs to 100 μs, to enable the use of standard processors and IO systems. Simulation accuracy increases when the time step value decrease but the processing power and number of processors increase when the time step decreases. The choice of integration techniques is also important. Simulation specialists must therefore select the best integration technique and time step that will yield to acceptable results. This document provides a comparison between simulation results obtained by using a classical 2nd order Tustin integration solver (also known as the Trapezoidal method) and the ARTEMIS 5th Order integration Method). The TUSTIN 2nd order method uses two terms of the Taylor series of the exponential function, while ARTEMIS 5th order uses five terms. Tustin is used by conventional electrical simulation software using the nodal technique such as PSCAD and EMTP while SimPowerSystems and eMEGAsim use ARTEMIS 5th order method in addition to the TUSTIN method.

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