A novel hybrid dynamic simulation algorithm based on iterative coordination

As power electronic devices are widely used in recent years, the dynamic behaviors of power systems become much more complicated, which are composed of electromechanical transient and electromagnetic transient. Therefore, a hybrid simulation tool for multi-timescale power systems is highly demanded. In this paper, a new hybrid simulation algorithm is proposed based on the energy balance of boundary buses. The energy balance is formulated as a boundary equation expressed in implicit function and solved in an iterative manner. A modified IEEE 9-bus system is used for case studies and test results are compared to PSCAD, which validates its accuracy.