含電動汽車微網(wǎng)經(jīng)濟優(yōu)化研究
[Abstract]:The economic scheduling of microgrid is the key to the optimal operation of microgrid system. Microgrid stroke, optical and other distributed power supply has the characteristics of intermittent and random, and its large-scale access to microgrid will bring great impact to the power grid. In recent years, due to the dual pressure of energy and environment, electric vehicle EV (Electric Vehicle) has been widely concerned by governments, energy enterprises and automobile manufacturers. Electric vehicle, a mobile vehicle energy storage device, can cut peaks and fill valleys by using "car-net" interactive V2G (Vehicle to Grid) mode to connect to micronetworks, and can calm the intermittent of renewable energy. Therefore, it is particularly important and necessary to study the optimal operation of microgrid with the participation of electric vehicles. The main purpose of this paper is to explore the impact of electric vehicle access to microgrid on microgrid economy. This paper first introduces the current research status of microgrid and the present situation of V2G technology, analyzes the opportunities and challenges brought by electric vehicle access to microgrid, and obtains the urgency and advantages of electric vehicle access to microgrid. Secondly, according to the emission characteristics and operation characteristics of photovoltaic, fan, cogeneration system, fuel cell, battery and electric vehicle, the mathematical models of power generation cost, emission cost, cold and heat benefit and maintenance cost are established respectively. Then, the concept of mileage anxiety is introduced, and three kinds of charging and discharging strategies of electric vehicle are put forward according to the degree of mileage anxiety in view of the problem of mileage anxiety of electric vehicle users. Then, according to the goal of the lowest comprehensive cost, the economic optimization models of microgrid with electric vehicle in the state of grid connection and isolated island operation are established respectively. Finally, the objective function is solved by using the improved particle swarm optimization algorithm with variable inertia weight. The optimal output and power trading of micro-sources with different mileage anxiety modes under different typical mileage anxiety modes of electric vehicles under the condition of grid-connected operation are given by an example. The optimal output of micro-source with different typical daily microgrid in isolated island operation mode is analyzed, and the economy of electric vehicle connecting to microgrid is analyzed. The rationality and effectiveness of the model are proved.
【學位授予單位】:江蘇大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:TM727
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