TSO-DSO Coordination for Voltage Regulation based on the Distribution Network Reconfiguration and Variable Shunt Reactors

With the growth of Distributed Generation (DG) in both the Transmission Network (TN) and the Distribution Network (DN), voltage management becomes increasingly complex and critical, necessitating more sophisticated tools and methods. Variable Shunt Reactors (VSRs) can, through the modification of their reactive power consumption, contribute to dynamically regulate the voltage. Distribution Network Reconfiguration (DNR) which consists of changing the topology of the DN, can enhance the use of the VSRs, through the creation of a path between them and the nodes where the voltage rises need to be regulated. Furthermore, since the TNs and the DNs are connected, they have the potential to influence each other, positively or negatively. For this reason, a coordination between the Transmission System Operator (TSO) and the Distribution System Operator (DSO) can allow the attainment of a more optimal solution. In this paper, the combination of the DNR with the VSRs to regulate the voltage of the TN, while taking into consideration the constraints of the DN, through an iterative method, is presented. The method is assessed on a 103-bus network and shows a high level of precision after few iterations.