针对电池储能系统(battery energy storage system,BESS)进行光伏波动平抑时寿命损耗高及荷电状态(state of charge,SOC)一致性差的问题,提出了光伏波动平抑下改进K-means的BESS动态分组控制策略。首先,采用最小最大调度方法获取光伏并...针对电池储能系统(battery energy storage system,BESS)进行光伏波动平抑时寿命损耗高及荷电状态(state of charge,SOC)一致性差的问题,提出了光伏波动平抑下改进K-means的BESS动态分组控制策略。首先,采用最小最大调度方法获取光伏并网指令。其次,设计了改进侏儒猫鼬优化算法(improved dwarf mongoose optimizer,IDMO),并利用它对传统K-means聚类算法进行改进,加快了聚类速度。接着,制定了电池单元动态分组原则,并根据电池单元SOC利用改进K-means将其分为3个电池组。然后,设计了基于充放电函数的电池单元SOC一致性功率分配方法,并据此提出BESS双层功率分配策略,上层确定电池组充放电顺序及指令,下层计算电池单元充放电指令。对所提策略进行仿真验证,结果表明,所设计的IDMO具有更高的寻优精度及更快的寻优速度。所提BESS平抑光伏波动策略在有效平抑波动的同时,降低了BESS运行寿命损耗并提高了电池单元SOC的均衡性。展开更多
At the beginning, this paper briefly introduces the evolution of information system development approach (ISDA), which can be divided into five categories: life cycle approach (LCA), structured approach (SA),prototypi...At the beginning, this paper briefly introduces the evolution of information system development approach (ISDA), which can be divided into five categories: life cycle approach (LCA), structured approach (SA),prototyping approach (PA), object oriented approach (OOA) and soft system methodology (SSM). After we make a comparative analysis of them,the main factors resulting in failure of information system development (ISD) in China are explained in detail. Consequently, such an assertion that false selection of unsuitable ISDA is the most important reason leading to unsuccessful ISD is reached. In order to avoid it, based on the fuzzy decision making theory, this article demonstrates a method of evaluating alternative ISDAes to select relatively satisfactory one out of them, for which a fuzzy synthetic discrimination model is created. In particular, a typical summarized evaluation index system is established, too. Finally, the application of the above method to a practical information system (IS) is illustrated.展开更多
文摘针对电池储能系统(battery energy storage system,BESS)进行光伏波动平抑时寿命损耗高及荷电状态(state of charge,SOC)一致性差的问题,提出了光伏波动平抑下改进K-means的BESS动态分组控制策略。首先,采用最小最大调度方法获取光伏并网指令。其次,设计了改进侏儒猫鼬优化算法(improved dwarf mongoose optimizer,IDMO),并利用它对传统K-means聚类算法进行改进,加快了聚类速度。接着,制定了电池单元动态分组原则,并根据电池单元SOC利用改进K-means将其分为3个电池组。然后,设计了基于充放电函数的电池单元SOC一致性功率分配方法,并据此提出BESS双层功率分配策略,上层确定电池组充放电顺序及指令,下层计算电池单元充放电指令。对所提策略进行仿真验证,结果表明,所设计的IDMO具有更高的寻优精度及更快的寻优速度。所提BESS平抑光伏波动策略在有效平抑波动的同时,降低了BESS运行寿命损耗并提高了电池单元SOC的均衡性。
文摘At the beginning, this paper briefly introduces the evolution of information system development approach (ISDA), which can be divided into five categories: life cycle approach (LCA), structured approach (SA),prototyping approach (PA), object oriented approach (OOA) and soft system methodology (SSM). After we make a comparative analysis of them,the main factors resulting in failure of information system development (ISD) in China are explained in detail. Consequently, such an assertion that false selection of unsuitable ISDA is the most important reason leading to unsuccessful ISD is reached. In order to avoid it, based on the fuzzy decision making theory, this article demonstrates a method of evaluating alternative ISDAes to select relatively satisfactory one out of them, for which a fuzzy synthetic discrimination model is created. In particular, a typical summarized evaluation index system is established, too. Finally, the application of the above method to a practical information system (IS) is illustrated.
