A Realistic Telecommunication Model for Electromagnetic Transient Simulations and Control Assessment of Multi-Terminal VSC-HVDC Networks in PSCAD/EMTDC

Abstract

A telecommunication system is vital for the operation and control of large electric power systems such as present and future multi-terminal HVDC networks. The latency in data transmission, and the variation in latency, known as jitter, are one of the most important features, in addition to reliability and security, to be considered in the modelling of telecommunication networks when assessing the overall performance of electric power systems. Further, in switched packet telecommunication systems, such as the internet, data packets arriving out of order might occur. Based on the behaviour of switched telecommunication networks and considering the latency as the main component to be represented, in this paper, a telecommunication model is developed and a user defined component is built in PSCAD/ EMTDC using the FORTRAN 90 language. Such a model is suitable to represent telecommunication networks with variable and constant latency as well as switched packet telecommunication systems, i.e. the internet and telephone networks. Results obtained from the application of the telecommunication model to the control a multi-terminal VSC HVDC network, interfacing offshore wind power generation, are then presented and discussed in the paper.