Optimal placement and schedule of multiple grid connected hybrid energy systems

This paper presents an artificial bee colony (ABC) based algorithm to optimally solve the problem of allocation and the problem of design and schedule of multiple hybrid photovoltaic (PV)-diesel distributed generation in distribution systems. Both problems are solved simultaneously. The objective of the proposed algorithm is to minimize the overall investment, replacement and operation and maintenance costs of each located hybrid photovoltaic-diesel system (HPVDS). As the hybrid energy systems are grid connected, the algorithm considers also the minimization of the distribution system power loss, the amount of imported power from the transmission grid and the un-served load in case of emergency. Meanwhile, the algorithm aims to maximize the excess generated power by the HPVDS that may be injected into the distribution network. These objectives are to be achieved while satisfying the operational constraints of the system. The proposed algorithm is applied to two test systems to validate its effectiveness.