随着风电渗透率的不断提高,恢复方案受接入风电不确定性的影响越来越大。对含高压直流馈入的受端系统,恢复期间高压直流输电(high-voltage direct current,HVDC)的启动及运行对交流系统的网架结构及功率调度方案均有较高要求。为最大限...随着风电渗透率的不断提高,恢复方案受接入风电不确定性的影响越来越大。对含高压直流馈入的受端系统,恢复期间高压直流输电(high-voltage direct current,HVDC)的启动及运行对交流系统的网架结构及功率调度方案均有较高要求。为最大限度地利用HVDC的支援功率加速系统恢复进程,在对HVDC馈入的受端系统进行恢复决策时考虑风电不确定性的影响具有十分重要的意义。为此,该文提出HVDC馈入下考虑风电不确定性的受端系统恢复决策方法。首先,基于非全维凸包不确定集详细刻画风电极端场景;其次,考虑风电不确定性及HVDC的启动及运行特性建立两阶段鲁棒恢复模型;然后,通过伴随网络法将HVDC的启动及运行特性进行线性化处理;之后,采用列与约束生成算法求解所构建的优化模型。最后,通过新英格兰10机39节点算例及我国西南某省实际算例验证所提方法的有效性与实用性。展开更多
Driving behavior modeling is very important in the research area of road traffic systems safety analysis. The characteristics of action of recovering from erroneous driving condition underlying road traffic accident o...Driving behavior modeling is very important in the research area of road traffic systems safety analysis. The characteristics of action of recovering from erroneous driving condition underlying road traffic accident or incident scenarios is quantitatively analyzed, the model of action of recovering from erroneous driving condition is set up according to the identification of erroneous driving condition and the measurement of correction from erroneous driving condition. And then, the probability of action of recovering from erroneous driving condition has been measured based on a revised decision tree. The measure process uses a combination of test data and subjective judgments of driving behavior. It can provide a very helpful theoretical basis for the further analysis of driving behavior in road traffic system.展开更多
Based on service-oriented architecture(SOA),a Bellman-dynamic-programming-based approach of service recovery decision-making is proposed to make valid recovery decisions.Both the attribute and the process of service...Based on service-oriented architecture(SOA),a Bellman-dynamic-programming-based approach of service recovery decision-making is proposed to make valid recovery decisions.Both the attribute and the process of services in the controllable distributed information system are analyzed as the preparatory work.Using the idea of service composition as a reference,the approach translates the recovery decision-making into a planning problem regarding artificial intelligence (AI) through two steps.The first is the self-organization based on a logical view of the network,and the second is the definition of evaluation standards.Applying Bellman dynamic programming to solve the planning problem,the approach offers timely emergency response and optimal recovery source selection,meeting multiple QoS (quality of service)requirements.Experimental results demonstrate the rationality and optimality of the approach,and the theoretical analysis of its computational complexity and the comparison with conventional methods exhibit its high efficiency.展开更多
文摘随着风电渗透率的不断提高,恢复方案受接入风电不确定性的影响越来越大。对含高压直流馈入的受端系统,恢复期间高压直流输电(high-voltage direct current,HVDC)的启动及运行对交流系统的网架结构及功率调度方案均有较高要求。为最大限度地利用HVDC的支援功率加速系统恢复进程,在对HVDC馈入的受端系统进行恢复决策时考虑风电不确定性的影响具有十分重要的意义。为此,该文提出HVDC馈入下考虑风电不确定性的受端系统恢复决策方法。首先,基于非全维凸包不确定集详细刻画风电极端场景;其次,考虑风电不确定性及HVDC的启动及运行特性建立两阶段鲁棒恢复模型;然后,通过伴随网络法将HVDC的启动及运行特性进行线性化处理;之后,采用列与约束生成算法求解所构建的优化模型。最后,通过新英格兰10机39节点算例及我国西南某省实际算例验证所提方法的有效性与实用性。
文摘Driving behavior modeling is very important in the research area of road traffic systems safety analysis. The characteristics of action of recovering from erroneous driving condition underlying road traffic accident or incident scenarios is quantitatively analyzed, the model of action of recovering from erroneous driving condition is set up according to the identification of erroneous driving condition and the measurement of correction from erroneous driving condition. And then, the probability of action of recovering from erroneous driving condition has been measured based on a revised decision tree. The measure process uses a combination of test data and subjective judgments of driving behavior. It can provide a very helpful theoretical basis for the further analysis of driving behavior in road traffic system.
文摘Based on service-oriented architecture(SOA),a Bellman-dynamic-programming-based approach of service recovery decision-making is proposed to make valid recovery decisions.Both the attribute and the process of services in the controllable distributed information system are analyzed as the preparatory work.Using the idea of service composition as a reference,the approach translates the recovery decision-making into a planning problem regarding artificial intelligence (AI) through two steps.The first is the self-organization based on a logical view of the network,and the second is the definition of evaluation standards.Applying Bellman dynamic programming to solve the planning problem,the approach offers timely emergency response and optimal recovery source selection,meeting multiple QoS (quality of service)requirements.Experimental results demonstrate the rationality and optimality of the approach,and the theoretical analysis of its computational complexity and the comparison with conventional methods exhibit its high efficiency.