Transient and steady-state analysis for STATCOM mathematical model

This paper overall analysis seady state and transient condition mathematical model for STATCOM direct-current side electric capacity voltage, unifies the STATCOM main circuit´s design simultaneously, calculated electric capacity voltage movement scope, waves and electric capacity voltage size which are under various operating modes for this equipment. In this paper applies to low-pressure area which makes use of the two-level, and set up a mathematical model for STATCOM devices which using SPWM control method, this modeling method is based on dq0 coordinate transformation, make use of circuit model transformation, get hold of the reactive current drawn mathematical expression directly, and the simulation results shown that the modeling method is simple, effective and enriched the STATCOM research tools.