Optimal voltage control and demand response: Integration between Distribution System Operator and microgrids

The aim of this paper is to propose a new voltage controller for Distribution System Operators (DSOs), based on a multi-objective optimization, which considers the presence of microgrids in the distribution network. This paper is focused on DSO's optimization problem, which has to minimize grid losses, and to take into account some ancillary services provided by the microgrids, such as demand response policies and reactive power injections, in order to obtain an efficient voltage regulation in all grid's nodes. The developed model has been applied to a case study with real data that includes two microgrids, a medium voltage load, and a primary substation with a transformer equipped with on-load tap changer.