Implementation of Modal Domain Transmission Line Models in the ATP Software

Abstract

Electromagnetic Transients Program make extensive use of transmission line models for the simulation of electromagnetic transients. This paper proposes a circuit representation of the modal transformation, more specifically Clarke's matrix. The arrangement of ideal transformers we propose allows modal transformation to be directly implemented in software such as Alternative Transient Program -Electromagnetic Transients Program. We combined the proposed circuit with single-phase transmission line models that consider frequency independent and frequency dependent parameters to represent transposed three-phase transmission lines. The main advantage of the proposed approach is that it allows the implementation of new transmission line models without depending on models provided in applications. To show this capability, we included the frequency dependence of soil parameters in the simulations. Results show that the proposed model is accurate both in the frequency domain and in the time domain.

Using the Exact Equivalent π-Circuit Model for Representing Three-Phase Transmission Lines Directly in the Time Domain

“…In the implementation of the three-phase model in circuit simulation programs such as ATP, the transformation of voltages and currents from the phase domain to the modal one, and vice-versa, is performed with the use of an arrangement of ideal transformers, as described in [5]. In this method, each ideal transformer's turns ratio and polarity represent a Clarke matrix component in Equation (18).…”

“…In TL models, where the calculations are performed in the modal domain, the diverse phases of the MTL are represented in the modal domain by n propagation modes [4,5]. Each of these modes behave as a single-phase TL.…”

“…Among the MTL models for obtaining the transient response developed directly in the time domain, some of the solutions that rely on modal transformation are, for example, the Bergeron model, the π circuit cascade model, and mainly the JMarti model; these are all implemented in transient electromagnetic (EMT) programs such as the Alternative Transient Program (ATP). The use of the JMarti model is very popular for validating new TL models, as shown in [5,16,17].…”

The Impact of Lightning Strike on Hybrid High Voltage Overhead Transmission Line – Insulated Gas Line

“…Simulation models EMTP-ATP software is used to modelling and simulation, Electromagnetic Transients Program is a software tool used by power systems engineers to analyse electromagnetic transients and associated insulation issues, it is developed by Dr. Scott Meyer and co. in USA. The used models of the OHL line and these components have been developed in[5,21]. The surge arresters were represented by the Pinceti and Giannettoni frequency-dependent model[1,2,5,7,10,14] as shown in Fig.3.…”

“…The used models of the OHL line and these components have been developed in[5,21]. The surge arresters were represented by the Pinceti and Giannettoni frequency-dependent model[1,2,5,7,10,14] as shown in Fig.3.…”