Voltage and Power Quality Control in Wind Power Application by Dynamic Compensation

Abstract

Power quality problem is a critical problem in a power system. Most of the pollution problems created in power system is due to the nonlinear nature of loads. Due to large amount of non-linear equipment, impact and fluctuating loads (such as locomotive, arc-furnace, welding equipment, etc.); wind power as a rule, does not contribute to voltage regulation in grids. Also wind power very often is a source of voltage sag or swell. The power systems are often considered weak in that they possess relatively low short-circuit ratio, compared to a grid. Network voltage control becomes a challenging task as a result.  The loads are also sensitive to short-duration disturbances in the form of voltage sags or swells. The use of STATCOM in improving voltage quality of isolating power systems is considered. The compensators are used to mitigate the effects of momentary voltage sags/swells.

Keywords: Sag, STATCOM, Power quality