This paper systematically studies the flashover probability of wind turbine blade lightning arrester and the impact of strong electromagnetic pulses on the local and surrounding wind turbines during lightning strikes....This paper systematically studies the flashover probability of wind turbine blade lightning arrester and the impact of strong electromagnetic pulses on the local and surrounding wind turbines during lightning strikes.The research results indicate that the flashover probability of direct lightning strikes by the wind turbine blade lightning arrester is almost negligible,and the strong electromagnetic pulse of wind turbine blade during lightning strikes has a serious impact on the electronic equipment of the machine,while the impact on the surrounding wind turbine is relatively small.At the same time,the calculation formula for the reflection of lightning current on the carbon brush between the wind turbine hub and the engine compartment during the flashing of the wind turbine blades is provided,and the calculation method for calculating the spatial gradient distribution of electromagnetic field intensity using Biot-Savart Law theorem is applied.The limitations of using wind turbine blades for lightning protection are pointed out,and a technical route for achieving wind turbine lightning safety is proposed,which can be used as a reference for wind turbine lightning protection technicians.展开更多
针对无线通信网络易受环境影响、拓扑结构变化迅速带来的服务质量(Quality of Service,QoS)保障需求和快速响应需求,提出一种基于Q学习的智能路由策略,利用强化学习技术能与环境实时交互的优势,以转控分离、网络可编程的软件定义网络(So...针对无线通信网络易受环境影响、拓扑结构变化迅速带来的服务质量(Quality of Service,QoS)保障需求和快速响应需求,提出一种基于Q学习的智能路由策略,利用强化学习技术能与环境实时交互的优势,以转控分离、网络可编程的软件定义网络(Software Defined Networking,SDN)架构为路由策略的部署平台,考虑路由跳数和网络流量对时延、带宽、丢包率等QoS的需求设计状态、动作、奖励等强化学习的基本要素,构建智能体,并搭建基于SDN的仿真环境,利用SDN控制器收集网络节点信息、链路状态信息开展智能体训练与测试,打造智能化的路由方案。仿真结果表明,所提方法能够根据网络中的实时信息和用户需求提供定制化的路由策略,进行动态智能选路,并进行快速响应。展开更多
基金Research Project on Lightning Protection Technology for 35 kV Collector Lines in Wuxuan Qinglan Wind Farm(SFC/WXY-ZX-FW-23-008)Strong Electromagnetic Pulse Protection(Lightning)Effect in Guangdong Yuedian Zhuhai Biqing Bay Sea Wind Field and Real-time Monitoring Technology Research and Development Project of Grounding ResistanceResearch and Application Demonstration Project of Lightning Protection Technology for Offshore and Island Wind Field of China General Nuclear New Energy South China Branch.
文摘This paper systematically studies the flashover probability of wind turbine blade lightning arrester and the impact of strong electromagnetic pulses on the local and surrounding wind turbines during lightning strikes.The research results indicate that the flashover probability of direct lightning strikes by the wind turbine blade lightning arrester is almost negligible,and the strong electromagnetic pulse of wind turbine blade during lightning strikes has a serious impact on the electronic equipment of the machine,while the impact on the surrounding wind turbine is relatively small.At the same time,the calculation formula for the reflection of lightning current on the carbon brush between the wind turbine hub and the engine compartment during the flashing of the wind turbine blades is provided,and the calculation method for calculating the spatial gradient distribution of electromagnetic field intensity using Biot-Savart Law theorem is applied.The limitations of using wind turbine blades for lightning protection are pointed out,and a technical route for achieving wind turbine lightning safety is proposed,which can be used as a reference for wind turbine lightning protection technicians.
文摘针对无线通信网络易受环境影响、拓扑结构变化迅速带来的服务质量(Quality of Service,QoS)保障需求和快速响应需求,提出一种基于Q学习的智能路由策略,利用强化学习技术能与环境实时交互的优势,以转控分离、网络可编程的软件定义网络(Software Defined Networking,SDN)架构为路由策略的部署平台,考虑路由跳数和网络流量对时延、带宽、丢包率等QoS的需求设计状态、动作、奖励等强化学习的基本要素,构建智能体,并搭建基于SDN的仿真环境,利用SDN控制器收集网络节点信息、链路状态信息开展智能体训练与测试,打造智能化的路由方案。仿真结果表明,所提方法能够根据网络中的实时信息和用户需求提供定制化的路由策略,进行动态智能选路,并进行快速响应。