Multi objective operation of micro grids in presence of combine micro heat and power generators

Operation in micro grids containing combined heat and power generators require specific modeling and optimization methods due to interrelation between electricity and heat. In this paper after introducing a proto type micro grid and corresponding dispersed generations a multi objective problem is investigated for micro grid operation. Based on three factors: generation cost function, environmental emission and micro grid loss a three objective optimization model is proposed. Considering proposed model a genetic algorithm based method entitled Non-dominated Sorting Genetic Algorithm (NSGAII) is employed. The objective is providing simultaneous electricity and heat considering the possibility of electricity trading with external grid. Subsequently, three scenarios: using domestic boiler, gas engine contribution and micro turbine contribution are presented for providing electricity and heat demands of consumers and the best scenarios is selected at the end.