对微网中各类分布式能源(distributed energy resource,DER)运行状况进行等年值成本与效益分析,体现了微网整体投资与效益,从而为微网方案的遴选提供参考。应用改进层次分析法(analytic hierarchy process,AHP)从主、客观角度综合分析...对微网中各类分布式能源(distributed energy resource,DER)运行状况进行等年值成本与效益分析,体现了微网整体投资与效益,从而为微网方案的遴选提供参考。应用改进层次分析法(analytic hierarchy process,AHP)从主、客观角度综合分析了微网的成本、效益。利用三标度法构造判断矩阵提高收敛速度和一致性,归一化专家构建判断矩阵的权重向量的期望作为各指标权重;综合考虑DER的经济运行状况、对环境和不同种类负荷造成影响等因素来量化等年值微网成本、效益的各指标。对4种微网方案进行了成本-效益评估,评估结果表明该微网区域采用风机与蓄电池组合可以取得较好经济效益,从而验证了该方法的可行性。展开更多
To improve the controllability and utilization of distributed energy resources(DERs),distribution-level electricity markets based on consumers’bidding and offers have been proposed.However,the transaction costs will ...To improve the controllability and utilization of distributed energy resources(DERs),distribution-level electricity markets based on consumers’bidding and offers have been proposed.However,the transaction costs will dramatically increase with the rapid development of DERs.Therefore,in this paper,we develop an energy sharing scheme that allows users to share DERs with neighbors,and design a novel incentive mechanism for benefit allocation without users’bidding on electricity prices.In the energy sharing scheme,an aggregator organizes a number of electricity users,and trades with the connected power grid.The aggregator is aimed at minimizing the total costs by matching the surplus energy from DERs and electrical loads.A novel index,termed as sharing contribution rate(SCR),is presented to evaluate different users’contributions to the energy sharing.Then,based on users’SCRs,an efficient benefit allocation mechanism is implemented to determine the aggregator’s payment to users that incentivize their participation in energy sharing.To avoid users’bidding,we propose a decentralized framework for the energy sharing and incentive mechanism.Case studies based on real-world datasets demonstrate that the aggregator and users can benefit from the energy sharing scheme,and the incentive mechanism allocates the benefits according to users’contributions.展开更多
Integration of more renewable energy resources introduces a challenge in frequency control of future power systems.This paper reviews and evaluates the possible challenges and the new control methods of frequency in f...Integration of more renewable energy resources introduces a challenge in frequency control of future power systems.This paper reviews and evaluates the possible challenges and the new control methods of frequency in future power systems.Different types of loads and distributed energy resources(DERs) are reviewed.A model representation of a population of the water heater devices for the demand side frequency response is considered.A model representation of a population of battery energy storage system(BESS)-based DERs such as smart electric vehicles(EVs) charging, large-scale BESSs, and residential and non-residential BESSs, are highlighted.The simplified Great Britain power system and the 14-machine South-East Australian power system were used to demonstrate the effectiveness of the new methods in controlling power system frequency following a disturbance.These new methods are effective in recovering the fallen frequency response and present a great potential in controlling the frequency in future power systems.展开更多
智能电网的发展为分布式能源(distributed energy resources,DER)的大量并网及对其进行协调优化调度提供了技术支持。结合各类DER的特点设计了基于多代理系统(multi-agent system,MAS)的虚拟电厂(virtual power plant,VPP)协调优化调度...智能电网的发展为分布式能源(distributed energy resources,DER)的大量并网及对其进行协调优化调度提供了技术支持。结合各类DER的特点设计了基于多代理系统(multi-agent system,MAS)的虚拟电厂(virtual power plant,VPP)协调优化调度策略。针对风电机组、传统机组和既可作为电源又可作为负载的电动汽车特殊负荷,通过建立相应的出力或负荷数学模型,对其进行分类分层控制,在MATLAB中使用YALMIP工具箱建模,通过加权方法进行多目标优化求解。最后通过算例分析验证此调度策略的合理性与有效性,它可以利用各类DER特性,使其相互协调配合,在平抑负荷波动的同时,可以实现各类DER最大程度并网。展开更多
针对分布式电源(distributed energy resource,DER)在配电网的并网运行,文章研究了利用峰谷分时电价改善其运行特性的优化运营策略。首先基于负荷转移率研究了用户负荷需求对峰谷分时电价的响应模型。接着通过研究负荷峰谷时段划分方法...针对分布式电源(distributed energy resource,DER)在配电网的并网运行,文章研究了利用峰谷分时电价改善其运行特性的优化运营策略。首先基于负荷转移率研究了用户负荷需求对峰谷分时电价的响应模型。接着通过研究负荷峰谷时段划分方法,建立反映供电侧消纳分布式电源不确定并网功率的运营成本效益模型,结合模糊机会约束理论,提出了考虑分布式电源并网不确定性的分时电价优化策略。在此基础上,进一步基于粒子群优化算法研究了分时电价优化模型的求解方法。最后利用仿真论证了所提电价运营优化模型的可行性,仿真结果表明需求侧的分时电价运营不仅能够提高配电网的分布式电源消纳能力,而且有益于提高配电网的运营综合效益。展开更多
文摘对微网中各类分布式能源(distributed energy resource,DER)运行状况进行等年值成本与效益分析,体现了微网整体投资与效益,从而为微网方案的遴选提供参考。应用改进层次分析法(analytic hierarchy process,AHP)从主、客观角度综合分析了微网的成本、效益。利用三标度法构造判断矩阵提高收敛速度和一致性,归一化专家构建判断矩阵的权重向量的期望作为各指标权重;综合考虑DER的经济运行状况、对环境和不同种类负荷造成影响等因素来量化等年值微网成本、效益的各指标。对4种微网方案进行了成本-效益评估,评估结果表明该微网区域采用风机与蓄电池组合可以取得较好经济效益,从而验证了该方法的可行性。
基金supported by National Natural Science Foundation of China(No.51777102,No.51537005)Chinese Association of Science and Technology Young Elite Scientists Sponsorship Program(No.YESS20170206)the State Grid Corporation of China(No.5210EF18000G).
文摘To improve the controllability and utilization of distributed energy resources(DERs),distribution-level electricity markets based on consumers’bidding and offers have been proposed.However,the transaction costs will dramatically increase with the rapid development of DERs.Therefore,in this paper,we develop an energy sharing scheme that allows users to share DERs with neighbors,and design a novel incentive mechanism for benefit allocation without users’bidding on electricity prices.In the energy sharing scheme,an aggregator organizes a number of electricity users,and trades with the connected power grid.The aggregator is aimed at minimizing the total costs by matching the surplus energy from DERs and electrical loads.A novel index,termed as sharing contribution rate(SCR),is presented to evaluate different users’contributions to the energy sharing.Then,based on users’SCRs,an efficient benefit allocation mechanism is implemented to determine the aggregator’s payment to users that incentivize their participation in energy sharing.To avoid users’bidding,we propose a decentralized framework for the energy sharing and incentive mechanism.Case studies based on real-world datasets demonstrate that the aggregator and users can benefit from the energy sharing scheme,and the incentive mechanism allocates the benefits according to users’contributions.
文摘Integration of more renewable energy resources introduces a challenge in frequency control of future power systems.This paper reviews and evaluates the possible challenges and the new control methods of frequency in future power systems.Different types of loads and distributed energy resources(DERs) are reviewed.A model representation of a population of the water heater devices for the demand side frequency response is considered.A model representation of a population of battery energy storage system(BESS)-based DERs such as smart electric vehicles(EVs) charging, large-scale BESSs, and residential and non-residential BESSs, are highlighted.The simplified Great Britain power system and the 14-machine South-East Australian power system were used to demonstrate the effectiveness of the new methods in controlling power system frequency following a disturbance.These new methods are effective in recovering the fallen frequency response and present a great potential in controlling the frequency in future power systems.
文摘智能电网的发展为分布式能源(distributed energy resources,DER)的大量并网及对其进行协调优化调度提供了技术支持。结合各类DER的特点设计了基于多代理系统(multi-agent system,MAS)的虚拟电厂(virtual power plant,VPP)协调优化调度策略。针对风电机组、传统机组和既可作为电源又可作为负载的电动汽车特殊负荷,通过建立相应的出力或负荷数学模型,对其进行分类分层控制,在MATLAB中使用YALMIP工具箱建模,通过加权方法进行多目标优化求解。最后通过算例分析验证此调度策略的合理性与有效性,它可以利用各类DER特性,使其相互协调配合,在平抑负荷波动的同时,可以实现各类DER最大程度并网。
文摘针对分布式电源(distributed energy resource,DER)在配电网的并网运行,文章研究了利用峰谷分时电价改善其运行特性的优化运营策略。首先基于负荷转移率研究了用户负荷需求对峰谷分时电价的响应模型。接着通过研究负荷峰谷时段划分方法,建立反映供电侧消纳分布式电源不确定并网功率的运营成本效益模型,结合模糊机会约束理论,提出了考虑分布式电源并网不确定性的分时电价优化策略。在此基础上,进一步基于粒子群优化算法研究了分时电价优化模型的求解方法。最后利用仿真论证了所提电价运营优化模型的可行性,仿真结果表明需求侧的分时电价运营不仅能够提高配电网的分布式电源消纳能力,而且有益于提高配电网的运营综合效益。
