With the acceleration of urbanization and construction of villages and towns,excessive development,repeated construction and extensive expansion have appeared gradually,causing great spatial pressure for villages and ...With the acceleration of urbanization and construction of villages and towns,excessive development,repeated construction and extensive expansion have appeared gradually,causing great spatial pressure for villages and towns.Spatial control technology as an effective control means for resources' allocation and development mode plays an increasingly significant role in the planning and construction of village-and-town system.By taking Beiyang Town of Hebiqi County for example,in the perspective of influential factors of subarea division,spatial planning subarea and spatial control strategy,the paper has introduced and discussed spatial control technology,providing a train of thought for spatial control planning.展开更多
配电网中分布式电源渗透率的升高和电动汽车的大量接入使得集中优化模式难以满足控制灵活性和供电可靠性的要求。针对主动配电网(active distribution network,ADN)无功优化问题,建立了区内集中式、区间分布式的ADN分区分布式协调控制架...配电网中分布式电源渗透率的升高和电动汽车的大量接入使得集中优化模式难以满足控制灵活性和供电可靠性的要求。针对主动配电网(active distribution network,ADN)无功优化问题,建立了区内集中式、区间分布式的ADN分区分布式协调控制架构,并基于等网损微增率准则提出了ADN分布式无功优化方法,可以实现全局网损的分区分布式优化,保证系统电压质量和安全运行。所提方法包括无约束情况下的ADN分布式无功优化模型和针对功率电压越限处理的节点网损微增率(incremental rate of network loss,IRL)修正方法,尤其适用于系统规模大、分布式电源渗透率高以及分区数较多的ADN。基于IEEE33节点和69节点的仿真结果表明所提分布式无功优化方法具有较快的收敛速度和较优的全局优化效果,并且可以有效应对局部通信故障,保证ADN供电的可靠性和经济性。展开更多
针对城市路网中区域性的大范围交通拥堵问题,提出了基于宏观基本图(Macroscopic Fundamental Diagram,MFD)的多子区协调控制策略,以提升路网的整体运行效益.该策略将城市区域路网划分为多个子区,每个子区的交通流又划分为内部流和转移流...针对城市路网中区域性的大范围交通拥堵问题,提出了基于宏观基本图(Macroscopic Fundamental Diagram,MFD)的多子区协调控制策略,以提升路网的整体运行效益.该策略将城市区域路网划分为多个子区,每个子区的交通流又划分为内部流和转移流,综合两者建立了基于MFD的多子区交通流模型,并给出了对各子区交通流诱导时的边界约束条件;通过调节子区边界控制输入,设计了边界反馈控制器对各子区转移流进行动态诱导,继而进行了迭代分析,以判断其是否满足边界约束,并对控制器进行了Lyapunov稳定性分析.仿真结果表明,所提策略使城市区域路网中各子区车辆总数渐近收敛于设定值,且整体平均流量提高了约11%,大范围交通拥堵状况得到明显缓解.展开更多
基金Supported by the Fund of "11 th Five-year Plan" National Key Technology Support Program(2008BAJ08B17)~~
文摘With the acceleration of urbanization and construction of villages and towns,excessive development,repeated construction and extensive expansion have appeared gradually,causing great spatial pressure for villages and towns.Spatial control technology as an effective control means for resources' allocation and development mode plays an increasingly significant role in the planning and construction of village-and-town system.By taking Beiyang Town of Hebiqi County for example,in the perspective of influential factors of subarea division,spatial planning subarea and spatial control strategy,the paper has introduced and discussed spatial control technology,providing a train of thought for spatial control planning.
文摘配电网中分布式电源渗透率的升高和电动汽车的大量接入使得集中优化模式难以满足控制灵活性和供电可靠性的要求。针对主动配电网(active distribution network,ADN)无功优化问题,建立了区内集中式、区间分布式的ADN分区分布式协调控制架构,并基于等网损微增率准则提出了ADN分布式无功优化方法,可以实现全局网损的分区分布式优化,保证系统电压质量和安全运行。所提方法包括无约束情况下的ADN分布式无功优化模型和针对功率电压越限处理的节点网损微增率(incremental rate of network loss,IRL)修正方法,尤其适用于系统规模大、分布式电源渗透率高以及分区数较多的ADN。基于IEEE33节点和69节点的仿真结果表明所提分布式无功优化方法具有较快的收敛速度和较优的全局优化效果,并且可以有效应对局部通信故障,保证ADN供电的可靠性和经济性。
文摘针对城市路网中区域性的大范围交通拥堵问题,提出了基于宏观基本图(Macroscopic Fundamental Diagram,MFD)的多子区协调控制策略,以提升路网的整体运行效益.该策略将城市区域路网划分为多个子区,每个子区的交通流又划分为内部流和转移流,综合两者建立了基于MFD的多子区交通流模型,并给出了对各子区交通流诱导时的边界约束条件;通过调节子区边界控制输入,设计了边界反馈控制器对各子区转移流进行动态诱导,继而进行了迭代分析,以判断其是否满足边界约束,并对控制器进行了Lyapunov稳定性分析.仿真结果表明,所提策略使城市区域路网中各子区车辆总数渐近收敛于设定值,且整体平均流量提高了约11%,大范围交通拥堵状况得到明显缓解.