A Real-Time Simulation Model of Transmission Lines Incorporating Specific Frequency Dependence

Transmission lines’ non-negligible distributed capacitance can increase the risk of broadband resonance in power systems. However, the distributed parameter characteristics and frequency-dependent characteristics are commonly ignored in the transmission line modeling during the analysis of resonance, which may lead to inaccurate stability assessment and pseudo oscillations in simulations. In this article, a harmonic frequency range transmission line model suitable for real-time simulation (RTS) is proposed. First, a simplified calculation method of parameters based on system structures is expanded. Afterward, a detailed equivalent circuit of the multi-phase model is implemented in RTS to meet the requirements of decoupling and parallel computing. Finally, the electrical parameters are modified based on the harmonic frequency to improve the Bergeron model and the proposed model (PM) is developed accordingly. Simulation results show that the PM is highly suitable for time-domain simulation and high-order harmonic analysis.