Reactive Power Procurement as Ancillary Service for Dispersed Electric Vehicles in Radial Distribution System

Reactive power management which is termed a local area phenomenon has a serious concern with new era distribution system where an enormous burden has been put on to existing system due to the insertion of Electric Vehicles. These EVs as load may disturb the load flow profile of Radial Distribution System (RDS) if not attended properly. Voltage drop can be adjusted by the existing generators in system as they can expand their reactive power capabilities but this can make them overburden and the system may suffer from real power crises. According to utility, reactive power is designated as one of the most important ancillary services that can be provided at a local level through the Distribution Generator (DG) owner or others in lieu of additional charges from the customers. This paper presents an iteration-based reactive power procurement for attending the voltage profile which was being disturbed through the insertion of dispersed electric vehicles in the radial distribution system. The method is framed for IEEE 14 Bus RDS to demonstrate how the customers at EV charging station has to pay extra for reactive power procurement as an ancillary service.