In this paper, we adopt Java platform to achieve a multi-tier distributed object enterprise computing model which provides an open, flexible, robust and cross-platform standard for enterprise applications of new gener...In this paper, we adopt Java platform to achieve a multi-tier distributed object enterprise computing model which provides an open, flexible, robust and cross-platform standard for enterprise applications of new generation. In addition to this model, we define remote server objects as session or entity objects according to their roles in a distributed application server, which separate information details from business operations for software reuse. A web store system is implement by using this multi-tier distributed object enterprise computing model.展开更多
With the development of automation in smart grids,network reconfiguration is becoming a feasible approach for improving the operation of distribution systems.A novel reconfiguration strategy was presented to get the o...With the development of automation in smart grids,network reconfiguration is becoming a feasible approach for improving the operation of distribution systems.A novel reconfiguration strategy was presented to get the optimal configuration of improving economy of the system,and then identifying the important nodes.In this strategy,the objectives increase the node importance degree and decrease the active power loss subjected to operational constraints.A compound objective function with weight coefficients is formulated to balance the conflict of the objectives.Then a novel quantum particle swarm optimization based on loop switches hierarchical encoded was employed to address the compound objective reconfiguration problem.Its main contribution is the presentation of the hierarchical encoded scheme which is used to generate the population swarm particles of representing only radial connected solutions.Because the candidate solutions are feasible,the search efficiency would improve dramatically during the optimization process without tedious topology verification.To validate the proposed strategy,simulations are carried out on the test systems.The results are compared with other techniques in order to evaluate the performance of the proposed method.展开更多
利用柔性多状态开关(soft open point,SOP)提升配电网的分布式能源(distributed generation,DG)消纳能力,提出了配电台区SOP的多目标优化控制策略。通过分析配电网SOP的接入模式,考虑其在分布式电源消纳与削峰填谷的作用,构建了分布式...利用柔性多状态开关(soft open point,SOP)提升配电网的分布式能源(distributed generation,DG)消纳能力,提出了配电台区SOP的多目标优化控制策略。通过分析配电网SOP的接入模式,考虑其在分布式电源消纳与削峰填谷的作用,构建了分布式能源日消纳量最大、控制成本最低和馈线日净负荷偏差最小的多目标模型。以改进的配电网算例进行仿真对比验证。结果表明:SOP接入有利于提升新能源消纳,并实现负载均衡。展开更多
针对高比例清洁能源接入配电网的背景,对柔性开关(soft open point,SOP)与需求响应(demand response,DR)接入主动配电网优化重构问题展开研究,提出了考虑SOP和DR的配电网重构策略。首先,构建配电网的SOP与DR模型,以综合考虑损耗费用、...针对高比例清洁能源接入配电网的背景,对柔性开关(soft open point,SOP)与需求响应(demand response,DR)接入主动配电网优化重构问题展开研究,提出了考虑SOP和DR的配电网重构策略。首先,构建配电网的SOP与DR模型,以综合考虑损耗费用、运营成本与负载不均衡度为优化目标,建立计及SOP与DR的多目标主动配电网优化重构模型。然后,采用一种改进的规格化法平面约束法(normalized normal constraint,NNC)求解该三目标优化问题的完整Pareto前沿以获得折中最优解。最后以IEEE 33节点配电系统为例进行验证。结果表明综合考虑SOP与DR的配电网重构策略可以有效提升配电网的经济性,提高清洁能源的消纳能力,以及降低系统线路的负载不均衡度。展开更多
随着电动汽车的高速发展,越来越多的电动汽车接入配电网并与配电网进行互动。针对大规模电动汽车接入配电网带来的线路重过载现象,且考虑调度大规模电动汽车对配电网调控中心产生的通信压力,提出一种基于主从博弈的电动汽车参与城市电...随着电动汽车的高速发展,越来越多的电动汽车接入配电网并与配电网进行互动。针对大规模电动汽车接入配电网带来的线路重过载现象,且考虑调度大规模电动汽车对配电网调控中心产生的通信压力,提出一种基于主从博弈的电动汽车参与城市电网分层分区调控策略。首先提出了一种基于改进分区组合性的城市配电网分区方法,将负荷相似系数以及源荷匹配系数引入到分区参数中。基于分区结果,提出了分区控制下电动汽车双层博弈调度模型,上层模型为配电网调控中心在满足精细化削峰需求约束下的自身收益最大化,并制定了与下层电动汽车聚合商的交易电价;下层模型以聚合商内电动汽车用户用电成本最低为目标,合理安排电动汽车充放电计划,两者之间形成互动博弈并达到均衡解。最后,利用同步型交替方向乘子法(synchronous alternating direction methodofmultipliers,S-ADMM)算法实现了多区域的分布式并行求解,并基于南方某市266节点配电网进行仿真计算,验证了所提模型和方法的有效性。展开更多
文摘In this paper, we adopt Java platform to achieve a multi-tier distributed object enterprise computing model which provides an open, flexible, robust and cross-platform standard for enterprise applications of new generation. In addition to this model, we define remote server objects as session or entity objects according to their roles in a distributed application server, which separate information details from business operations for software reuse. A web store system is implement by using this multi-tier distributed object enterprise computing model.
基金Project(61102039)supported by the National Natural Science Foundation of ChinaProject(2014AA052600)supported by National Hi-tech Research and Development Plan,China
文摘With the development of automation in smart grids,network reconfiguration is becoming a feasible approach for improving the operation of distribution systems.A novel reconfiguration strategy was presented to get the optimal configuration of improving economy of the system,and then identifying the important nodes.In this strategy,the objectives increase the node importance degree and decrease the active power loss subjected to operational constraints.A compound objective function with weight coefficients is formulated to balance the conflict of the objectives.Then a novel quantum particle swarm optimization based on loop switches hierarchical encoded was employed to address the compound objective reconfiguration problem.Its main contribution is the presentation of the hierarchical encoded scheme which is used to generate the population swarm particles of representing only radial connected solutions.Because the candidate solutions are feasible,the search efficiency would improve dramatically during the optimization process without tedious topology verification.To validate the proposed strategy,simulations are carried out on the test systems.The results are compared with other techniques in order to evaluate the performance of the proposed method.
文摘利用柔性多状态开关(soft open point,SOP)提升配电网的分布式能源(distributed generation,DG)消纳能力,提出了配电台区SOP的多目标优化控制策略。通过分析配电网SOP的接入模式,考虑其在分布式电源消纳与削峰填谷的作用,构建了分布式能源日消纳量最大、控制成本最低和馈线日净负荷偏差最小的多目标模型。以改进的配电网算例进行仿真对比验证。结果表明:SOP接入有利于提升新能源消纳,并实现负载均衡。
文摘针对高比例清洁能源接入配电网的背景,对柔性开关(soft open point,SOP)与需求响应(demand response,DR)接入主动配电网优化重构问题展开研究,提出了考虑SOP和DR的配电网重构策略。首先,构建配电网的SOP与DR模型,以综合考虑损耗费用、运营成本与负载不均衡度为优化目标,建立计及SOP与DR的多目标主动配电网优化重构模型。然后,采用一种改进的规格化法平面约束法(normalized normal constraint,NNC)求解该三目标优化问题的完整Pareto前沿以获得折中最优解。最后以IEEE 33节点配电系统为例进行验证。结果表明综合考虑SOP与DR的配电网重构策略可以有效提升配电网的经济性,提高清洁能源的消纳能力,以及降低系统线路的负载不均衡度。
文摘随着电动汽车的高速发展,越来越多的电动汽车接入配电网并与配电网进行互动。针对大规模电动汽车接入配电网带来的线路重过载现象,且考虑调度大规模电动汽车对配电网调控中心产生的通信压力,提出一种基于主从博弈的电动汽车参与城市电网分层分区调控策略。首先提出了一种基于改进分区组合性的城市配电网分区方法,将负荷相似系数以及源荷匹配系数引入到分区参数中。基于分区结果,提出了分区控制下电动汽车双层博弈调度模型,上层模型为配电网调控中心在满足精细化削峰需求约束下的自身收益最大化,并制定了与下层电动汽车聚合商的交易电价;下层模型以聚合商内电动汽车用户用电成本最低为目标,合理安排电动汽车充放电计划,两者之间形成互动博弈并达到均衡解。最后,利用同步型交替方向乘子法(synchronous alternating direction methodofmultipliers,S-ADMM)算法实现了多区域的分布式并行求解,并基于南方某市266节点配电网进行仿真计算,验证了所提模型和方法的有效性。
