随着新型电力系统建设持续推进,直流微电网将成为配电网的重要组成部分。直流微电网接入交流负载时,振荡型功率会进入直流系统,影响分布式储能系统功率分配。为此,给出了储能系统功率分配综合原则,并以此提出一种无互联通信网络的功率...随着新型电力系统建设持续推进,直流微电网将成为配电网的重要组成部分。直流微电网接入交流负载时,振荡型功率会进入直流系统,影响分布式储能系统功率分配。为此,给出了储能系统功率分配综合原则,并以此提出一种无互联通信网络的功率分配方法。该方法以荷电状态作为“信息载体”,各储能单元仅需本地荷电状态(state of charge,SOC)信息即可完成自适应调整,在实现SOC均衡控制的同时,还能够让振荡型功率合理分配。此外,从等效输出阻抗的角度出发,对不同控制算法的分配效果展开了详细的分析讨论,表明了所提控制算法可以满足综合原则的要求。最后,通过实验验证了所提分布式储能控制策略的有效性。展开更多
能源低碳转型的时代大背景下,清洁能源持续向规模化、集约化发展。针对包含多种清洁能源的冷热电联供系统(combined cooling heating and power,CCHP)微网与共享储能电站的协同优化调度问题,考虑不同类型负荷的耦合特性以及综合需求响...能源低碳转型的时代大背景下,清洁能源持续向规模化、集约化发展。针对包含多种清洁能源的冷热电联供系统(combined cooling heating and power,CCHP)微网与共享储能电站的协同优化调度问题,考虑不同类型负荷的耦合特性以及综合需求响应对其激励作用,提出构建一种供需协同优化的CCHP-共享储能电站(shared energy storage station,SESS)双层经济调度模型,并提出一种考虑电满意度、热和冷舒适度的综合满意度指标。双层模型中,上层主体为CCHP微网,下层主体为共享储能电站,采用KKT(Karush-Kuhn-Tucker)条件对其实施降维,并以大M法引入二进制变量将非线性约束线性化,转为混合整数线性规划模型后调用CPLEX进行求解。以新疆某园区CCHP-SESS系统作为算例,仿真分析与验证结果表明,考虑综合需求响应可有效改善负荷功率分布,实现清洁能源出力特性与负荷需求响应特性的高效拟合,缓解供能压力;提出的CCHP-SESS双层优化配置方法通过协调上下层不同利益主体的能量分配,可有效降低CCHP微网的运行成本,同时增加共享储能电站收益,提升清洁能源消纳水平,确保系统供能稳定性。展开更多
This paper proposes a useful web-based system for the management and sharing of electron probe micro-analysis( EPMA)data in geology. A new web-based architecture that integrates the management and sharing functions is...This paper proposes a useful web-based system for the management and sharing of electron probe micro-analysis( EPMA)data in geology. A new web-based architecture that integrates the management and sharing functions is developed and implemented.Earth scientists can utilize this system to not only manage their data,but also easily communicate and share it with other researchers.Data query methods provide the core functionality of the proposed management and sharing modules. The modules in this system have been developed using cloud GIS technologies,which help achieve real-time spatial area retrieval on a map. The system has been tested by approximately 263 users at Jilin University and Beijing SHRIMP Center. A survey was conducted among these users to estimate the usability of the primary functions of the system,and the assessment result is summarized and presented.展开更多
文摘随着新型电力系统建设持续推进,直流微电网将成为配电网的重要组成部分。直流微电网接入交流负载时,振荡型功率会进入直流系统,影响分布式储能系统功率分配。为此,给出了储能系统功率分配综合原则,并以此提出一种无互联通信网络的功率分配方法。该方法以荷电状态作为“信息载体”,各储能单元仅需本地荷电状态(state of charge,SOC)信息即可完成自适应调整,在实现SOC均衡控制的同时,还能够让振荡型功率合理分配。此外,从等效输出阻抗的角度出发,对不同控制算法的分配效果展开了详细的分析讨论,表明了所提控制算法可以满足综合原则的要求。最后,通过实验验证了所提分布式储能控制策略的有效性。
文摘能源低碳转型的时代大背景下,清洁能源持续向规模化、集约化发展。针对包含多种清洁能源的冷热电联供系统(combined cooling heating and power,CCHP)微网与共享储能电站的协同优化调度问题,考虑不同类型负荷的耦合特性以及综合需求响应对其激励作用,提出构建一种供需协同优化的CCHP-共享储能电站(shared energy storage station,SESS)双层经济调度模型,并提出一种考虑电满意度、热和冷舒适度的综合满意度指标。双层模型中,上层主体为CCHP微网,下层主体为共享储能电站,采用KKT(Karush-Kuhn-Tucker)条件对其实施降维,并以大M法引入二进制变量将非线性约束线性化,转为混合整数线性规划模型后调用CPLEX进行求解。以新疆某园区CCHP-SESS系统作为算例,仿真分析与验证结果表明,考虑综合需求响应可有效改善负荷功率分布,实现清洁能源出力特性与负荷需求响应特性的高效拟合,缓解供能压力;提出的CCHP-SESS双层优化配置方法通过协调上下层不同利益主体的能量分配,可有效降低CCHP微网的运行成本,同时增加共享储能电站收益,提升清洁能源消纳水平,确保系统供能稳定性。
基金National Major Scientific Instruments and Equipment Development Special Funds,China(No.2016YFF0103303)National Science and Technology Support Program,China(No.2014BAK02B03)
文摘This paper proposes a useful web-based system for the management and sharing of electron probe micro-analysis( EPMA)data in geology. A new web-based architecture that integrates the management and sharing functions is developed and implemented.Earth scientists can utilize this system to not only manage their data,but also easily communicate and share it with other researchers.Data query methods provide the core functionality of the proposed management and sharing modules. The modules in this system have been developed using cloud GIS technologies,which help achieve real-time spatial area retrieval on a map. The system has been tested by approximately 263 users at Jilin University and Beijing SHRIMP Center. A survey was conducted among these users to estimate the usability of the primary functions of the system,and the assessment result is summarized and presented.
