Active and reactive power balancing of Ubiquitous power networks considering voltage constraints

Non-conventional distributed renewable energy sources like wind and solar are increasingly becoming popular world over. A significant amount of these energy sources are expected to be connected to the distribution network due to their low spatial density. But the intermittent and random nature of these sources challenges the stability of the network. As such the power imbalance and hence the voltage fluctuation caused should be addressed to allow high penetration of these renewable energy sources. Controllable loads and Plug-in Electric Vehicles (PEV) has high potential to arrest the power fluctuations caused by renewable energy sources. The reactive power capability of Distributed Energy Resources (DER) like PV, Battery storage system and Combined Heat and power generators has the potential to maintain the voltage in the distribution feeder. This paper presents a coordinated control algorithm to maintain the power balance within the subsystem while preserving the voltage constrains of the distribution network.