Real-time transient simulation of multimachine power system networks in the phase domain

This paper details implementation of the mathematical model of a synchronous generator in the direct time phase domain suitable for transient analysis in a real-time simulation environment. The network model, which is a full multimachine model in the phase domain, has been implemented on a multipurpose real time station (RTS). A solution method for solving the direct time phase domain model of the generator in the multimachine environment, where transmission imbalances are fully taken into account, has also been proposed. The method is based on discretisation of the state equations for the generator and the interconnecting network. The proposed model and solution method is compared with an industry standard power system package, PSCAD/EMTDC™. The model enables a unified approach to be adopted in the study of both symmetrical and asymmetrical operating conditions. A thorough analysis is performed to evaluate the model performance in real-time, where the frame time of simulation is a subject of study.