An Improved Electricity-Carbon Economic Dispatch Method for Microgrid Considering Carbon Trading

This paper investigates an improved electricity-carbon coordinated economic dispatch method for microgrid, which contains load aggregators with demand response. Firstly, the framework of electricity-carbon coordinated dispatch for microgrid is described, which analyzes demand response on user side and different units of microgrid. Secondly, the characteristics of three kind of loads in load aggregators are analyzed based on their responsiveness. Thirdly, considering several issues including the operation mode of microgrid, carbon trading and the mechanism of load aggregators with demand response, an improved electricity-carbon economic dispatch model is established and solved by particle swarm optimization. Finally, simulation results confirm that load aggregators participate in demand response of microgrid dispatching, which can reduce load peak-valley difference and enhance the operation safety of microgrid. Moreover, the participation of microgrid in carbon trading market has the effect of cooperative gain and reduces operating costs by 40% in comparison with only participating in electricity market.