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Multi-objective economic dispatch model for a microgrid considering reliability

According to operation characteristics of a microgrid with fluctuant energy, such as solar energy, wind energy and alike, a multi-objective economic dispatching model for microgrid is proposed. These objectives are to minimize the production cost, customer outage cost and emission pollution cost. Taking into account characteristics of the proposed model, the maximum fuzzy satisfaction degree method is used for fuzzy multi-objective optimization problem to transform the multi-objective optimization problem into a non-linear single-objective optimum problem, which is solved by using particle swarm algorithm at the hour-level commitment of DGs and the output power distributions of DGs. Simulation results show that multi-objective model is better than single-objective model in reflecting the actual operation characteristics of microgrid more precisely and reaching a higher reliability and environmental benefit at as low operation cost as possible.