DSM for all‐day voltage profile improvement in a microgrid

Abstract

The role of demand side management (DSM) has changed the scenario of control and management in a microgrid. DSM works on real time without utilising any additional equipment in the network. The study proposes an all-day voltage control methodology using DSM. The contribution of this study is threefold. Firstly, a novel method for the day ahead voltage profile improvement is proposed by shifting flexible loads using demand and generation forecast information. Secondly, the proposed method uses only two parameters, the impedance of the network and amount of power injected to the flexible loads, in order to influence the voltage level and to improve overall voltage profile of the system. Thirdly, factor matrix is introduced; it decides which flexible loads to be shifted to regulate voltage within tolerance limits. In order to verify the effectiveness of the proposed voltage control method, it is tested on an low voltage (LV) distribution system considered as a microgrid. The result indicates that when the flexible loads are shifted with proper margin, the voltage of the system is contained within a limit and results in better load distribution throughout the day.