Abstract
With the rapid development of the new concept of energy internet, electric power systems often need to be investigated together with thermal energy systems. Additionally, to reduce pollution from gas emissions, it is very important to study the economic and emission dispatch of integrated electrical and heating systems. Hence, this paper proposes a multi-objective optimization dispatch model for a microgrid (MG) with a combined heat and power (CHP) system. This CHP-based MG system consists of a CHP unit, a wind turbine, a PV system, a fuel cell, an electric boiler, an electric storage, and a heat storage. It can exchange electricity with the distribution network and exchange heat with the district heating network. Minimum economic cost and minimum environmental cost are considered as the two objectives for the operation of this CHP-based MG system. To solve the two objective optimization problem, the multi-objective bacterial colony chemotaxis algorithm is utilized to obtain the Pareto optimal solution set, and the optimal solution is chosen by the Technique for Order of Preference by Similarity to Ideal Solution method. Finally, numerical case studies demonstrate the effectiveness of proposed model and method for the optimal economic and emission dispatch of the CHP-based MG system.
Highlights
With the wide concern on the gradual depletion and pollution emission of fossil fuels, renewable energy such as wind and solar has been significantly developed [1,2]
The proposed economic and emission dispatch model is applied to the combined heat and power (CHP)-based
To better compare the CHP‐based MG system under the two scenarios, it is important to obtain an equilibrium from the contradictive economic cost and environmental cost
Summary
With the wide concern on the gradual depletion and pollution emission of fossil fuels, renewable energy such as wind and solar has been significantly developed [1,2]. The combined heat and power (CHP) system can provide both electricity and heat to users, and it has been widely applied in many MGs due to its high energy efficiency. Such a CHP-based MG system is composed of both electric and thermal energy sources, which is covered by the new concept of energy internet [3], where the efficient utilization of multiple energy resources is emphasized. The study of the CHP-based MG systems is significant for practical applications. There are already a significant amount of studies on the design and operation of the CHP-based
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