Parametric average value modeling of high power AC/AC cyclo converters

Line-commutated thyristor-controlled AC/DC and AC/AC converters are commonly used in high power industrial applications. Therefore, analyzing industrial distribution systems requires accurate and computationally efficient models that may be easily implemented in simulation software packages. Average-value models (AVMs) avoid the discrete switching of the converters, provide accurate system-level steady-state and transient simulation results, which make such models particularly suitable for large scale studies of power electronic systems. Parametric average value modeling (PAVM) is one of very promising techniques resulting in accurate models that are also considerably simpler in terms of mathematical complexity. The PAVMs for AC/DC converter systems have been thoroughly analyzed in literature. This paper proposes a new PAVM for AC/AC cyclo-converters which supply the load at lower AC frequencies. The superior performance and computational advantages of the proposed PAVM of cyclo-converters are verified against the detailed model in terms of CPU efficiency as well as numerical accuracy.