Monitoring and Control of Captive Generation Units in Presence of Grid Integrated Solar Power Plants

Industrial loads and large power consumers use various forms of Renewable Energy Sources (RES) apart from utility grid services, in order to reduce Running Maximum Demand (RMD). It also provides financial savings in utility bills with reduced consumption of energy from grid. Solar Power Plant (SPP)-based RES is the most abundant form of such energy and most widely used in world. In order to reduce down time of loads, industrial consumers install captive generation units with SPP-based RES to cater power requirements of these loads during grid failure. But the operations of these captive units are badly affected by SPP-based RES units, as soon as they start supporting the load in integrated system during grid failure. This paper analyzes the impact of SPP-based RES on captive generation unit and proposes a protection scheme using local reactive power units.