Development of a phase shifting regulator for power flow control in low voltage grids

摘要

The increasing number of renewable generators, in particular photovoltaic systems in the low voltage networks of rural areas, causes a strong increase of the power flows. As of today, in meshed grids the power flow is not controlled and the thermal limits of cables can be reached or exceeded. As a consequence failures may occur. With the help of phase shifting regulators for low-voltage distribution grids the power flow in a meshed grid can be controlled and thermal overstress can be prevented to a certain extent. A new type of equipment is proposed which can regulate the power flow by applying a control voltage at a certain angle. In this paper, the methods for calculating the control voltage and a design concept for the regulator are presented.