Modeling and Analysis of Large Scale Power System with Multi-infeed HVDC by EMTDC

This paper establishes a simulation platform of large scale power grid with multi-infeed DC using EMTDC, in order to analyze the interaction of AC/DC systems and its influence on protective relaying. The principles and methods of the models adoption, the scale of power system, network simplification and data processing are dealt with to balance the simulation demands between precision and efficiency. Particularly, this paper presentes the reasonable treatment scheme to Tianguang HVDC system´s equivalence access of 500 kV mainframe grid. It also concludes with a comparative study in the form of simulation between the existing power grid (Guangdong power grid in China) and the platform constructed by analyzing different fault and system conditions. It demonstrates the possible applications of the platform and means to study different cases of these problems.