Abstract:

The proliferation of inverter based resources (IBRs) in the developing power system has led to a growing interest in the development of hybrid AC and DC systems. These hybrid systems would allow for the simpler integration of these IBRs, many of which operate in the DC domain, with the bulk distribution network. However, the integration of these resources requires techniques to evaluate their impact on system operation, ensuring they operate in a safe and reliable manner. This paper presents a technique to perform load flow analysis on hybrid AC and DC networks which generalizes earlier work on single phase networks. This technique is capable of handling multiphase AC networks, complex system topologies (such as multiterminal or bipolar configurations), diverse inverter control techniques, and component outages, such as the loss of an inverter or transmission line. The scalability and computational efficiency of the method are tested on multiple case studies.