面对配网结构与规模的快速变化,为了准确快速地实现实际复杂配网的可靠性计算分析,提出了一种基于GIS(geographic information system)配网拓扑数据的改进最小路可靠性算法。该算法针对GIS系统拓扑数据特性设计了一套完整的拓扑数据简...面对配网结构与规模的快速变化,为了准确快速地实现实际复杂配网的可靠性计算分析,提出了一种基于GIS(geographic information system)配网拓扑数据的改进最小路可靠性算法。该算法针对GIS系统拓扑数据特性设计了一套完整的拓扑数据简化、最小路矩阵构建及等效、用户及系统可靠性分析计算流程,以GIS系统拓扑数据表为基础实现了大规模复杂配电网可靠性的计算。该算法通过元件消去实现了配电网结构的简化,并通过选择性元件抽取减小了算法检索的元件总量,同时通过检索过程中对元件出入线端数据进行调整完成了母线到配变的定向检索。对广东某变电站的实际馈线,分别采用改进最小路法与传统解析法进行了计算,对比结果验证了本文算法的可行性与准确性。展开更多
为了对复杂配电系统进行可靠性评估,提出将改进深度优先搜索(depth first searching,DFS)算法应用到复杂配电系统可靠性评估中。该算法不仅考虑了断路器、隔离开关、熔断器的影响,能处理有无备用变压器的情况,而且考虑了复杂配电系统中...为了对复杂配电系统进行可靠性评估,提出将改进深度优先搜索(depth first searching,DFS)算法应用到复杂配电系统可靠性评估中。该算法不仅考虑了断路器、隔离开关、熔断器的影响,能处理有无备用变压器的情况,而且考虑了复杂配电系统中计划检修、有无备用电源等因素。算例验证了该算法的有效性。展开更多
In order to characterize the voltage behavior of a lithium-ion battery for on-board electric vehicle battery management and control applications,a battery model with a moderate complexity was established.The battery o...In order to characterize the voltage behavior of a lithium-ion battery for on-board electric vehicle battery management and control applications,a battery model with a moderate complexity was established.The battery open circuit voltage (OCV) as a function of state of charge (SOC) was depicted by the Nernst equation.An equivalent circuit network was adopted to describe the polarization effect of the lithium-ion battery.A linear identifiable formulation of the battery model was derived by discretizing the frequent-domain description of the battery model.The recursive least square algorithm with forgetting was applied to implement the on-line parameter calibration.The validation results show that the on-line calibrated model can accurately predict the dynamic voltage behavior of the lithium-ion battery.The maximum and mean relative errors are 1.666% and 0.01%,respectively,in a hybrid pulse test,while 1.933% and 0.062%,respectively,in a transient power test.The on-line parameter calibration method thereby can ensure that the model possesses an acceptable robustness to varied battery loading profiles.展开更多
文摘面对配网结构与规模的快速变化,为了准确快速地实现实际复杂配网的可靠性计算分析,提出了一种基于GIS(geographic information system)配网拓扑数据的改进最小路可靠性算法。该算法针对GIS系统拓扑数据特性设计了一套完整的拓扑数据简化、最小路矩阵构建及等效、用户及系统可靠性分析计算流程,以GIS系统拓扑数据表为基础实现了大规模复杂配电网可靠性的计算。该算法通过元件消去实现了配电网结构的简化,并通过选择性元件抽取减小了算法检索的元件总量,同时通过检索过程中对元件出入线端数据进行调整完成了母线到配变的定向检索。对广东某变电站的实际馈线,分别采用改进最小路法与传统解析法进行了计算,对比结果验证了本文算法的可行性与准确性。
文摘为了对复杂配电系统进行可靠性评估,提出将改进深度优先搜索(depth first searching,DFS)算法应用到复杂配电系统可靠性评估中。该算法不仅考虑了断路器、隔离开关、熔断器的影响,能处理有无备用变压器的情况,而且考虑了复杂配电系统中计划检修、有无备用电源等因素。算例验证了该算法的有效性。
基金Project(50905015) supported by the National Natural Science Foundation of China
文摘In order to characterize the voltage behavior of a lithium-ion battery for on-board electric vehicle battery management and control applications,a battery model with a moderate complexity was established.The battery open circuit voltage (OCV) as a function of state of charge (SOC) was depicted by the Nernst equation.An equivalent circuit network was adopted to describe the polarization effect of the lithium-ion battery.A linear identifiable formulation of the battery model was derived by discretizing the frequent-domain description of the battery model.The recursive least square algorithm with forgetting was applied to implement the on-line parameter calibration.The validation results show that the on-line calibrated model can accurately predict the dynamic voltage behavior of the lithium-ion battery.The maximum and mean relative errors are 1.666% and 0.01%,respectively,in a hybrid pulse test,while 1.933% and 0.062%,respectively,in a transient power test.The on-line parameter calibration method thereby can ensure that the model possesses an acceptable robustness to varied battery loading profiles.
