A New, Fast Technique for Load-Flow Solution of Integrated Multi-Terminal DC/AC Systems

The paper describes a new technique for the load-flow calculations of integrated ac/dc systems. The technique is fast, efficient and reliable and is therefore an improvement over known procedures. The representation of dc system is such that it leads to simplifications in calculations and saving in storage requirement and yet it is so ; eneral that a multi-terminal dc system of anyconfiguration and control characteristics can be easily simulated. The procedure uses fast decoupled load flow method, handles all ac/ dc equations simultaneously, and fully exploits the sparsity techniques. The paper shows application of the technique on two systems, one with a point-to-point dc transmission and the other with a 3-terminal mesh HVDC sub-system.