Some New Aspects on Load-Flow Calculation: I - Impedance Matrix Generation Controlled by Network Topology

Refined load flow calculation methods will exploit topological properties of the underlying network. An exact topological criterion, as well as a powerful handy approximation for most economic generation of the impedance matrix, are presented. Additional advantage may be taken from topology-controlled selection of reference bus and from appropriate insertion of artificial nodes. The new method has been carefully checked on a variety of power system networks of different size, the 30-, 57-, and 118-node standard test systems, authorized by IEEE Computer Application Subcommittee, among others.