Voltage stability support offered by active distribution networks

Abstract

This paper investigates distributed control schemes with which an Active Distribution Network can help to increase the voltage stability loadability limit of a bulk power system. Active distribution networks with converter connected renewable energy units can improve network operation through their control and regulation resources. In this paper the aim is to enhance power system voltage stability through distributed controls, respecting at the same time the operational limits of the distribution grid. Case studies of a radial power system, as well as of a real power system snapshot are included.