Abstract
The renewable energy microgrid is an effective solution for island energy supply with the advantages of low energy cost, environmental protection, and reliability. In this paper, an island renewable energy microgrid integrated with desalination units and electric vehicles is established to meet the self-satisfaction of the island’s sustainable electricity, fresh water, and transportation. The source side components of the system include photovoltaic cells, wind turbines, diesel generators, battery energy storage systems. A multi-objective dispatching optimization method based on the flexibility of electric vehicles and desalination units is proposed comprehensively considering the economy and renewable energy penetration indexes. The optimization objectives are minimizing the comprehensive operating cost, and the net load fluctuation. An improved multi-objective grey wolf optimizer is adopted to solve the dispatching problem. The system is modeled and simulated by MATLAB software. The feasibility of the proposed dispatching optimization method is verified by case studies and operation simulation. Four different cases are compared and analyzed to study the impact of EVs and DES on dispatching optimization.
Highlights
More than fifty thousand islands are present on the Earth, with a total area of over one-sixth of the global land area and hosting more than 740 million people
Literature [14] studied the reliable operation of an island microgrid by controlling the EVs charging and discharging and verified that the electric vehicles can provide the ability of load adjustment as a distributed energy storage device
This paper aims to establish a multi-objective dispatching optimization model of island renewable energy system integrated with electric vehicles and desalination units
Summary
More than fifty thousand islands are present on the Earth, with a total area of over one-sixth of the global land area and hosting more than 740 million people. Literature [14] studied the reliable operation of an island microgrid by controlling the EVs charging and discharging and verified that the electric vehicles can provide the ability of load adjustment as a distributed energy storage device. In literature [15], a multi-objective optimal load dispatching model of hybrid energy microgrid with random access of electric vehicles is proposed, which can effectively reduce the daily cost and improve the stability of system operation. Few studies simultaneously combine the actual electricity, water and transportation demands of the island, taking desalination units and electric vehicles into the optimization objects for comprehensive dispatching. A dispatching optimization method of island microgrid integrated desalination units and electric vehicles as flexible loads are proposed. A dispatching opt mization method of island microgrid integrated desalination units and electric vehicles flexible loads are proposed. The detailed modeling of the major system components is presented hereafter
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