储能装置在微网系统中的经济运行分析

The Economic Operation Analysis of Energy Storage Device in Micro-grid

本文基于风、光、柴油机、蓄电池复合发电系统研究分布式发电中的能量调度及优化设计问题。本文建立了风机、光伏阵列、柴油机及蓄电池的数学模型,利用该模型可以根据实时的太阳辐射强度和风速计算出光伏阵列和风力发电机的输出功率。本文所采用的能量调度策略为并网状态下最大限度地使用可再生能源。在此调度策略基础上,利用动态规划法确定柴油机和蓄电池的输出功率。最后在Matlab上通过算例系统对本文所研究的问题进行仿真分析,结果表明蓄电池在微网中的应用可以使系统达到降低经济成本、提高系统运行可靠性的目的。

In this paper, the scheduling and optimal design of energy in wind-solar-diesel-fuel cell-battery hybrid power generation system will be discussed. The mathematical models of solar array, wind turbine, diesel, battery and fuel cell are presented based on quasi-steady-state theory. By using the models, the output power of solar array and wind turbine are determined corresponding to solar radiation and wind velocity data. The energy scheduling strategy used in this paper is to maximize the use of renewable energy in the grid connected state. On the basis of this scheduling strategy, the output power of the diesel engine and the battery is determined by the dynamic pro-gramming method. Finally, on the Matlab through a numerical example system studied in this paper carries on the simulation analysis, the results show that the battery in the micro network application can make the system to reduce the cost and improve the reliability of the system operation.