Modified Differential Evolution based reactive power dispatch involving multilateral power transactions in deregulated power scenario

This paper considered reactive power dispatch (RPD) issue with multilateral power transaction in the backdrop of deregulated power scenario. RPD problem is solved for the real power loss minimization aspect including stable voltage profile. In the deregulated power environment power transaction is an important phenomenon which represents power transfer between supplier and utility or load center under the guidance of competent authority. Here IEEE 30 bus system is considered as test case to solve RPD issue involving multilateral power transactions. During the power transaction period voltage level imbalance, current flow and power loss enhancement are observed which indicated network congestion. Shunt capacitors and superconducting magnetic energy storage (SMES) devices are utilized for the handling of congestion via Var compensation. The optimal size of the proposed Var compensators along with the other control variables is decided by the Modified Differential Evolution (MDE) techniques. The MDE based minimum power loss is obtained as 13.51 MW which is much improved than the other evolutionary programming method based result. The results of the paper are therefore proved to be quite encouraging.