基于储能单元运行方式优化的微电网经济运行

在分析现有微电网各单元模型及微电网合理运行方式的基础上,建立了能满足实际约束的蓄电池充放电模型。以提高微电网运行的经济效益为目标,通过先后求解蓄电池及燃料电池的合理运行方式,最终确定微电网最佳运行方式。使用动态规划求解蓄电池最佳运行方式时,将蓄电池充放电过程离散化处理,并在此基础上由经济运行原则确定了合理的阶段及过程评价指标,以量化蓄电池动态效果。通过对实际算例进行分析,验证了该方法的有效性和可行性。

Economic Operation of Microgrid Based on Operation Mode Optimization of Energy Storage Unit

On the basis of analyzing element models of microgrid and its reasonable operation modes,a charging/discharging model of storage battery that can satisfy practical constraints is built.Regarding the improvement of economic benefit of microgrid operation as the objective,the optimal operation mode of microgrid is finally determined by solving reasonable operation modes of storage battery and fuel cell one after another.When dynamic programming is used to solve the optimal operation mode of storage battery,the charging/discharging process of storage battery is beforehand discretized,and on this basis reasonable evaluation indices to evaluate different charging/discharging stages and the charging/discharging process of storage battery are decided by economic operation principle to quantify dynamic effect of storage battery.The effectiveness and feasibility of the proposed method is verified by actual example.