Study on the Probabilistic Optimal Capacity of Energy Storage in Microgrid

doi:10.11930/j.issn.10.11930.2015.1.131

Abstract

Abstract: Renewable energy power generation represented by wind power and photovoltaic power is undispatchable and sensitive to the outer environment, which brings great challenge to safe operation of the micro-grid and can be effectively solved by connecting an energy storage system in the microgrid. The method to determine the energy storage capacity is studied when a micro-grid is operated in island state, and a probabilistic method is proposed to determine the optimal energy storage capacity. The power difference between the microgrid’s dispataching capacity and the load demand is firstly calculated, and then the maximum charging and discharging power of the energy storage system is determined through the probability density function curve. The optimal capacity of energy storage system can be obtained according to the probability density function curves of the accumulative charging and discharging power of the storage system at different times, which can improve the economic benefit and renewable energy utilization. The proposed method, when used for determine the microgrid’s energy storage capacity, is straightforward in solution and small in needed storage energy capactiy.

Key words: microgrid, renewable energy generation, energy storage systems, energy storage capacity, islanded operation, probabilistically optimal, dispatching capacity, load demand, probability density function

CLC Number:

TM742

MA Xiaobo, CHEN Min, ZHOU Xinnan. Study on the Probabilistic Optimal Capacity of Energy Storage in Microgrid[J]. journal1, 2015, 48(1): 131-136.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.10.11930.2015.1.131

https://www.electricpower.com.cn/EN/Y2015/V48/I1/131

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