Representation and simulation of AC/DC convertor systems using fixed and varying electrical axes

An electrical axes formulation of Kron´s tensor analysis is presented and applied to the representation and digital simulation of AC/DC bridge convertor systems. The electrical, transformer, and switching connections of a general convertor system are represented as fixed and varying electrical axes so that the system equations may be automatically formed and solved. The resulting general switching circuit simulation is capable of analysing transients in 12-pulse convertor systems with nonideal loads. The circuit theory used in deriving the simulation is suggestive of useful methods of describing and visualising convertor system phenomena.