CONTROL SYSTEM OF CIRCULATING CURRENT IN A WIND POWER SYSTEM DRIVEN BY 3-PARALLEL BACK-TO-BACK CONVERTERS USING A POWER THEORY

摘要

The present invention is a cyclic current compensation method using the PQR power theory of a wind power generation system driven by a parallel back-to-back converter, circulating current by applying the PQR power theory to a wind power generation system driven by a parallel back-to-back converter Compensation is made, and through this, it is possible to control to reduce the circulating current generated by parallel operation, and as the capacity of wind power facilities is gradually increased with the growth of renewable energy, the problem of rating of the system in three parallel operation To reduce the rating of the back-to-back converter, the power semiconductor switching element, and to facilitate the design of the grid-side filter through the control of the circulating current. Will be reduced.