Converter Simulations with the EMTP: Simultaneous Solution and Backtracking Technique

This paper deals with converter simulations with the EMTP. It is shown that one should seriously consider simultaneous solution of the converter control system equations and the power system equations, as well as a "backtracking" procedure to change tlic switch status at precise times. The paper describes the implementatioii of these procedures in tlic EMTP code and shows some examples to illustrate their practical importance.