Appendix A: Structure of the PSCAD/EMTDC program
PSCAD/EMTDC version 2 consists of a set of programs which enable the efficient simulation of a wide variety of power system networks. EMTDC (Electromagnetic Transient and DC), although based on the EMTP method, introduced a number of modifications so that switching discontinuities could be accommodated accurately and quickly, the primary motivation being the simulation of HVDC systems. PSCAD (Power Systems Computer Aided Design) is a graphical Unix-based user interface for the EMTDC program. PSCAD consists of software enabling the user to enter a circuit graphically, create new custom components, solve transmission line and cable parameters, interact with an EMTDC simulation while in progress and to process the results of a simulation.