Estimation of peak transient voltages at wind turbine generator terminals

Abstract

This paper proposes equivalent circuits and a method for the estimation of the peak transient voltages at generator terminals in wind turbines equipped with back‐to‐back converters. Equivalent circuits as well as a way of phase‐to‐phase and phase‐to‐ground voltages estimation in back‐to‐back converter are presented. Proposed theoretical background is well confirmed by small‐scale measurements. It is shown and proven that phase‐to‐ground voltages represent a dominating threat for the wind turbine generators insulation. Copyright © 2014 John Wiley & Sons, Ltd.

An alternative structure of the PMSM drive vector control

“…Electrical drives with permanent magnet synchronous machines (PMSM) have found a wide implementation in different fields of the present day society [1][2][3][4]15], whereas vector control has become the state of the art method of the a.c. drives control. Drive structure usually involves an a.c. machine equipped with sensors, a microcontroller and a PWM inverter, as shown in Fig.…”