| The advantages of SMPS make the simulation of it very important. There are three main challenges in the SMPS circuit simulation. The first one is how to continue the simulation after forced commutations. The second one is how to depress the numerical oscillation. The last one is how to minimize the size of the system matrices.; In this thesis, a series of new techniques are proposed. Two-branch switch models and modified Femia's technique can reinitialize the simulation. At the same time, the risk of island circuits due to the off states of switches is vanished. Generalized TLM stub models depress the numerical oscillation effectively. The TLM stub model decoupling technique minimizes the size of the system matrices and the computation burden.; At the end, the simulation results of new proposed algorithm, PSCAD/EMTDC and MULTISIM are compared. The curves are perfectly matched to each other. Thus, the new proposed algorithm works effectively. |
