Dynamic Simulation of Multiconverter HVDC Systems by Digital Computer Part II: Computer Program

The digital-computer techniques for the dynamic representation of HVDC power links are discussed. A digital-computer program is developed which may represent many circuit configurations, different modes of control, and protective devices. It also provides a model which offers both accuracy and flexibility. The way the mathematical model of a complex electric system which includes numerous switching processes and discontinuities may be programmed for a digital computer is discussed. In addition, methods for optimizing program storage and computer time are described. Selected test studies are also presented. The program developed enables a flexible and accurate simulation of HVDC systems operating normally or under fault conditions. The resulting program will be a highly efficient analytical tool for the system design engineer.