Study on site selection planning of urban electric vehicle charging station

The large-scale development of electric vehicles(EVs)requires numerous charging stations to serve them,and the charging stations should be reasonably laid out and planned according to the charging demand of electric vehicles.Considering the costs of both operators and users,a site selection model for optimal layout planning of charging stations is constructed,and a queuing theory approach is used to determine the charging pile configuration to meet the charging demand in the planning area.To solve the difficulties of particle swarm global optimization search,the improved random drift particle swarm optimization(IRDPSO)and Voronoi diagram are used to jointly solve for the optimal layout of electric vehicles.The final arithmetic analysis verifies the feasibility and practicality of the model and algorithm,and the results show that the total social cost is minimized when the charging station is 9,the location of the charging station is close to the center of gravity and the layout is reasonable.

Science Research and Utilization Planning of China’s Space Station in Operation Period 2022–2032

The core module of China’s Space Station(CSS)is scheduled to be launched around the end of 2020,and the experimental module I and II will be launched in the next two years.After on-orbit constructions,CSS will be transferred into an operation period over 10 years(2022–2032 and beyond)to continuously implement space science missions.At present,based on the project selection and research work in the ground development period of CSS,China is systematically making a utilization mission planning for the operation period,which focuses on the fields of aerospace medicine and human research,space life science and biotechnology,microgravity fluid physics,combustion science,materials science,fundamental physics,space astronomy and astrophysics,Earth science,space physics and space environment,space application technology,etc.In combination with the latest development trend of space science and technology,China will continue to update planning for science research and technology development,carry out project cultivation,payload R&D,and upgrade onboard and ground experiment supporting systems to achieve greater comprehensive benefits in science,technology,economy,and society。

Space station short-term mission planning using ontology modelling and time iteration

This paper studies the problem of the space station short-term mission planning, which aims to allocate the executing time of missions effectively, schedule the corresponding resources reasonably and arrange the time of the astronauts properly. A domain model is developed by using the ontology theory to describe the concepts, constraints and relations of the planning domain formally, abstractly and normatively. A method based on time iteration is adopted to solve the short-term planning problem. Meanwhile, the resolving strategies are proposed to resolve different kinds of conflicts induced by the constraints of power, heat, resource, astronaut and relationship. The proposed approach is evaluated in a test case with fifteen missions, thirteen resources and three astronauts. The results show that the developed domain ontology model is reasonable, and the time iteration method using the proposed resolving strategies can successfully obtain the plan satisfying all considered constraints.

Planning and Design of Dashuigou Reserve Station in Fengtongzhai Nature Reserve of Sichuan Province

Characteristics of Fengtongzhai Nature Reserve were analyzed from the perspective of animal and plant resources and cultural type. Design concepts of Dashuigou Reserve Station were proposed by combining with site characteristics, and key design points were summarized.

Integration of Transport and Land Use Planning by Transit-Oriented Development for Economic Sustainability of the Standard Gauge Railway Projects in Tanzania

Tanzania is one of the countries in Africa that has engaged in the projects for construction of the electrified Standard Gauge Railway (SGR). However, lack of integration of transportation and land-use planning threatens economic sustainability of the SGR project. This study was carried out for the purpose of finding-out how transportation can be integrated with land-use planning for economic sustainability of the project. The study was carried-out by using qualitative research approach through demonstration as case study. Findings show that construction of the SGR is not integrated with land-use planning around the stations and along the SGR corridor. It is concluded that economic sustainability of the SGR projects can be achieved by integration of transport and land-use planning. As demonstrated, it is recommended to deliberate for integration of transportation and land-use planning in the SGR projects of which the prime land within Transit Stations can be efficiently used by using Transit Oriented Development and secure more land for production activities around the Transit Stations and along the SGR corridor.

Strategic Placement of Charging Stations for Enhanced Electric Vehicle Adoption in San Diego, California

California mandated that 100% of vehicles sold must be electric by 2035. As electric vehicles (EVs) reach a higher penetration of the car sector, cities will need to provide publicly accessible charging stations to meet the charging demand of people who do not have access to a private charging spot like a personal garage. We have chosen to limit our scope to San Diego County due to its non-trivial size, well-defined shape, and dependence on personal vehicles;this project models 100% of current vehicles as electric, roughly 2.5 million. By planning for the future, our model becomes more useful as well as more equitable. We anticipate that our model will find locations that can service multiple population centers, while also maximizing distance to other stations. Sensitivity analysis and testing of our algorithms are conducted for Coronado Island, an island with 24,697 residents. Our formulation is then scaled to set the parameters for the whole county.

Development of ground control station and path planning for autonomous MUAV

For autonomous MUAV,the Ground Control Station(GCS)including hardware and modular software programming such as control modular,navigation modular,display modular and monitor modular becomes important equipment to be developed.This paper emphasizes the global planning and the local replanning arithmetic based on three-dimensional velocity potential field for the moving threats.During the test on the ground and in the sky,GCS show the remote sensing information precisely and send the control command in time.The system can be used to assist in the function of autonomous complex task for MUAV.

Space Resources Planning and Design of Rail Transit Station in Chongqing

According to the study on 39 sites of rail transit Line 3 in Chongqing, the sites are classifi ed into three types: residential type, business center type, traffi c hub type in this paper. The study shows that the sites have many problems such as discordance of land use, severity of spatial segregation, low rate of site utilization. To solve these problems, development approaches of site space resources within 1,000 m around the site area are further explored. The approaches include four aspects: characteristics of land use, functional composite, walking guide and shuttle transportation. In addition, appropriate planning and design methods are proposed.

Planning for China's Manned Space Station Announced

The fourth CAST Space Technology Forum was held on November 29, 2012 with the theme of Progress of China's Manned Space Station Project. Scientists, experts and government officials gathered to discuss the scheme, technical issues of the project, which consists of thirteen systems. CASC is in charge of the construction of seven systems through its subsidiaries. CALT is assigned to the building of LM-2F, LM-5 and LM-7 launch vehicles and CAST is assigned to the R&D of a space laboratory,

Space Research Plan of China's Space Station

China's manned spaceflight missions have been introduced briefly,and the research planning of space sciences for China's Space Station(CSS) has been presented with the topics in the research areas,including:life science and biotechnology,microgravity fluid physics and combustion science,space material science,fundamental physics,space astronomy and astrophysics,earth sciences and application,space physics and space environment,experiments of new space technology.The research facilities,experiment racks,and supporting system planned in CSS have been described,including:multifunctional optical facility,research facility of quantum and optic transmission,and a dozen of research racks for space sciences in pressurized module,etc.In the next decade,significant breakthroughs in space science and utilization will hopefully be achieved,and great contributions will be made to satisfy the need of the social development and people's daily life.

Optimal Configuration Method for the Installed Capacity of the Solar-Thermal Power Stations

Because of the randomness of wind power and photovoltaic(PV)output of new energy bases,the problem of peak regulation capability and voltage stability of ultra-high voltage direct current(UHVDC)transmission lines,we proposed an optimum allocation method of installed capacity of the solar-thermal power station based on chance constrained programming in this work.Firstly,we established the uncertainty model of wind power and PV based on the chance constrained planning theory.Then we used the K-medoids clusteringmethod to cluster the scenarios considering the actual operation scenarios throughout the year.Secondly,we established the optimal configuration model based on the objective function of the strongest transient voltage stability and the lowest overall cost of operation.Finally,by quantitative analysis of actual wind power and photovoltaic new energy base,this work verified the feasibility of the proposed method.As a result of the simulations,we found that using the optimal configuration method of solar-thermal power stations could ensure an accurate allocation of installed capacity.When the installed capacity of the solar-thermal power station is 1×106 kW,the transient voltage recovery index(TVRI)is 0.359,which has a strong voltage support capacity for the system.Based on the results of this work,the optimal configuration of the installed capacity of the solar-thermal power plant can improve peak shaving performance,transient voltage support capability,and new energy consumption while satisfying the Direct Current(DC)outgoing transmission premise.

铁路技术站阶段计划与钩计划一体化编制实验系统设计

随着我国铁路技术站信息化水平的不断提高,对培养具备基础知识、专业技能、应用能力、信息素养的学员(学生和铁路技术人员)提出了更高要求。为提高学员制定技术站作业计划的能力,研究阶段计划与钩计划的编制方法及相互关系,提出阶段计划与钩计划一体化编制思想,建立具备人机交互式阶段计划与钩计划一体化编制功能和智能辅助决策功能的实验系统。阐述了该系统的逻辑模型、组成及其功能。该系统已应用于行车组织课程设计实验中,有效提高了培训及教学的效率和效果。

多站融合的微能源系统站 网协同布局

为了促进资源的共享,提高能源利用率,建立了双层站网优化布局模型,对多站融合的微能源系统的融合站数量、位置、设备容量配置,以及管线分布进行了协同规划。上层模型采用最小生成树和谱聚类求解,解决了融合站数量、位置和管线分布问题;下层模型采用提出的改进的粒子群优化算法,解决了设备容量配置问题。通过对规划区域进行算例仿真,得出了系统站网协同布局的优化结果,验证了所提模型和算法的可行性与合理性。

NB/T 35009-2024修订内容解读及抽水蓄能电站标准化工作历程回顾

本文回顾了抽水蓄能电站选点规划标准化工作历程,从90年代选点规划工作范围逐步扩展,一批代表性站点规划落地,选点规划思想逐渐成熟,首版标准于2003年编制完成。到2009年全国范围抽水蓄能电站选点规划系统性开展,继22个省(区、市)完成选点工作,第二版标准修订完成,有效指导了实践工作。随着抽水蓄能电站选点规划的管理流程和技术路线不断成熟,选点规划已成为前期工作和开工建设的重要基础。双碳目标提出以来,抽水蓄能中长期发展规划为行业发展带来新机遇新挑战,第三版标准修订工作适时开展,区分功能定位、明确技术要求,积极响应了当前新能源和抽水蓄能行业高质量发展的要求。

作为城市基础设施的新能源汽车充电桩——服务新特性与规划新思维

研究聚焦作为新兴城市基础设施的新能源汽车充电桩,结合对长三角领先城市发展状况的实地考察,提炼其较之传统设施体系的异同点,进一步从理论视角出发剖析其内涵特性,并探讨适配的规划干预新思维。研究认为新能源汽车充电桩是一项以充电和停车为核心功能的从旧体系中生长出的新设施,因较之传统基础设施有更久的历时体验和更多的技术赋能,从而能支持各类新型使用场景。基于交通与能源两方面时空需求的叠合,充电桩的布局和使用涉及多主体多部门的差异化诉求,协同治理面临挑战。城市规划作为统筹公共资源空间分配的政策平台,理应将充电桩纳入公用设施体系的考量之中,在“投融建管营”一体化新思维下探索新的规划模式。这一模式既要与既有设施体系充分兼容,保持基础设施的稳定特性,又要能充分拥抱市场,通过技术迭代不断提升用户体验。

面向月球科研站任务的地月准实时遥操作模拟验证系统设计与关键技术研究

针对月球科研站任务地月遥操作需求和特点,设计地月准实时遥操作模拟验证系统,对其中的关键技术海量多尺度遥感数据环境感知、空地协同高精度定位、基于混合现实的预测仿真等进行了研究。提出了基于海量多尺度遥感数据的联合处理方法,环境感知数据融合可处理米级至厘米级环境感知结果;设计基于空地多运动平台协同定位的原型软件,空地协同地标约束下,定位精度不低于轨道器影像1个像素;开发了带有力觉反馈的预测仿真验证平台,在2~3 s变时延约束下可在仿真环境下协同演示遥操作过程,真实还原从端的遥操作作业场景,提高遥操作的执行效率和安全性。为地面人员的方案设计、操作手训练、故障处置等提供实时支持,为我国未来实施月球科研站任务筑牢基础。

寒区电动公交充电站选址及定容规划研究

寒区低温环境导致电动公交动力电池容量衰减,充电设施服务范围及规划数量受到影响,给电动公交充电站选址及定容规划带来挑战。为提高电动公交充电站的低温适应性,提出针对寒区电动公交充电站的选址算法及定容模型。首先,在选址规划中,构建充电站渐进覆盖服务半径,利用改进近邻传播聚类算法确定充电站选址点,基于算法聚类中心构建充电站Voronoi图划分充电集群。其次,在定容规划中,构建动力电池低温容量衰减模型,确定寒区电动公交的充电需求;基于容量有限的截尾排队论模型建立充电站有效服务强度、拒绝服务率及充电满意度等约束;引入成本权衡系数,以规划年限内全社会成本最小为优化目标,建立寒区充电站定容规划模型,并设计遗传算法进行求解。最后,以哈尔滨市市区电动公交充电站选址定容规划为例进行分析,算例结果得到9个充电站选址点及其充电集群,以及各充电站的充电机配置数量和各项成本。针对环境温度和成本权衡系数进行灵敏度分析,结果表明:寒区低温环境对充电站的充电机配置数量和各项成本有显著影响,合理权衡充电站和电动公交两者利益有助于提高充电服务满意度,降低全社会成本。

考虑不同制氢方法的高速公路加氢站布局规划

针对高速公路加氢设施不完善的问题,提出一种基于改进自适应遗传算法的高速公路加氢站布局方法。根据高速公路特性及电子收费记录,建立高速公路网络和加氢判断模型。基于多层次-模糊综合评价方法,从经济性、环保性以及安全性角度,提供适合高速公路加氢站的制氢方法和制氢地点的组合。再结合分布式光伏的投入,以经济效益最优为目标,构建高速公路站外和站内制氢2组目标函数,利用改进自适应遗传算法分别进行优化布局和容量配置。以沈海高速(浙江段)作为研究对象进行分析,提供了不同制氢方法下加氢站布局方案及相关设施的容量配置,算例结果与模糊综合评价结果相互验证了模型的有效性。

共享储能模式下电动汽车充电站双层优化运行策略

在电动汽车持有量快速增长的背景下,电动汽车充电站的建设需求日益强烈。为了提高充电站运行经济性,文中提出接入共享储能的电动汽车充电站优化调度方法。首先,分析分布式储能和共享储能的运行模式,以充电站年投资成本和年运行成本最低为上层目标函数,以典型日运行成本最小为下层目标函数,构建考虑储能不同运行模式的电动汽车充电站双层优化调度模型。其次,对3个具有差异性的电动汽车充电站进行仿真,并将多个场景下的不同储能运行模式进行对比。然后,在此基础上,针对共享储能服务费以及电动汽车放电损耗进行灵敏度分析。最后,算例表明,共享储能的接入对降低电动汽车充电站规划和运行成本具有积极作用,合理的储能服务费定价和电动汽车放电损耗成本能减少充电站运行成本。