Equivalent two-port measurement equations for reciprocal n-port network are de-rived.As an example,applications of these equations,measurement details and data-processingmethods are discussed for any three-port networ...Equivalent two-port measurement equations for reciprocal n-port network are de-rived.As an example,applications of these equations,measurement details and data-processingmethods are discussed for any three-port network.To realize rapid and automatic measure-ments of S-parameters of any reciprocal multiport network,a set of measurement system whichis composed of auto-slotted line and program controlled movable shorts is presented in this paper.Experimental data are given for an H-plane Tee three-port network.展开更多
Multiport magnetic network energy routers(MNERs)are a key technology in the energy internet that can improve the consumption level of renewable energy,realize the integration of source-grid-load-storage,and ensure the...Multiport magnetic network energy routers(MNERs)are a key technology in the energy internet that can improve the consumption level of renewable energy,realize the integration of source-grid-load-storage,and ensure the stable operation of power systems.However,the power grid may break down,causing the grid currents to exceed the safe threshold and the DC bus voltages to fluctuate,thereby threatening the stability of the power system.A coordinated low-voltage ride-through(LVRT)control strategy for an MNER-based grid connection system is proposed.The proposed control strategy can provide significant LVRT capability for an MNER-based grid-connection system and maintain the DC bus voltage of each port at the rated value.A simulation is conducted using the PLECS platform,and the results validate the effectiveness of the proposed coordinated LVRT control strategy.展开更多
数值优化为功率半导体模块实现低感与均流设计提供了灵活有效的新途径,但同时也对模块整体与分布电感的评估效率提出了更高要求。为了适应寻优计算需求,基于部分元等效电路(partial element equivalent circuit,PEEC)理论,提出一种基于...数值优化为功率半导体模块实现低感与均流设计提供了灵活有效的新途径,但同时也对模块整体与分布电感的评估效率提出了更高要求。为了适应寻优计算需求,基于部分元等效电路(partial element equivalent circuit,PEEC)理论,提出一种基于多端口网络模型的功率模块布局电感快速提取方法。该方法通过构建与芯片导通状态无关的多端口网络模型,从而将模块整体和分布电感的提取问题由多次大规模PEEC求解转化为单次预处理分解加端口网络求解。此外,为减少微元数量,针对模块线路的平面注入结构,对键合线、金属层直行区和注入区使用分区域离散策略。算例分析和实验验证表明,所提方法计算误差小于5%,满足工程应用需求,计算时间相比ANSYSQ3D软件减少85%以上,适合用于功率模块的快速寻优设计。展开更多
大量间歇性分布式电源的接入,给配电网带来了新的挑战。柔性多状态开关(Soft Open Point, SOP)是一种新型的电力电子装置,具有强大的功率调控和潮流优化能力。文中提出了一种基于SOP的有源配电网双层优化方法。考虑SOP运行控制的约束条...大量间歇性分布式电源的接入,给配电网带来了新的挑战。柔性多状态开关(Soft Open Point, SOP)是一种新型的电力电子装置,具有强大的功率调控和潮流优化能力。文中提出了一种基于SOP的有源配电网双层优化方法。考虑SOP运行控制的约束条件,建立了多端口SOP等效模型。以年综合费用最小为目标建立SOP上层规划模型,以多时段配电网电压偏差最小、网损最低为目标建立基于最优潮流的下层优化模型,并采用改进的遗传粒子群混合优化算法对双层优化模型进行求解。在IEEE 33节点算例上,对比分析了规划前后三端口SOP的优化能力。结果表明,SOP能有效解决配电网电压越限问题,同时降低系统损耗,并且合理的SOP规划对配电网运行优化效果更为显著。展开更多
文摘Equivalent two-port measurement equations for reciprocal n-port network are de-rived.As an example,applications of these equations,measurement details and data-processingmethods are discussed for any three-port network.To realize rapid and automatic measure-ments of S-parameters of any reciprocal multiport network,a set of measurement system whichis composed of auto-slotted line and program controlled movable shorts is presented in this paper.Experimental data are given for an H-plane Tee three-port network.
基金Supported by the National Key Research and Development Program of China(2022YFE0196300)Science,Technology&Innovation Funding Authority(STDF)(46505).
文摘Multiport magnetic network energy routers(MNERs)are a key technology in the energy internet that can improve the consumption level of renewable energy,realize the integration of source-grid-load-storage,and ensure the stable operation of power systems.However,the power grid may break down,causing the grid currents to exceed the safe threshold and the DC bus voltages to fluctuate,thereby threatening the stability of the power system.A coordinated low-voltage ride-through(LVRT)control strategy for an MNER-based grid connection system is proposed.The proposed control strategy can provide significant LVRT capability for an MNER-based grid-connection system and maintain the DC bus voltage of each port at the rated value.A simulation is conducted using the PLECS platform,and the results validate the effectiveness of the proposed coordinated LVRT control strategy.
文摘数值优化为功率半导体模块实现低感与均流设计提供了灵活有效的新途径,但同时也对模块整体与分布电感的评估效率提出了更高要求。为了适应寻优计算需求,基于部分元等效电路(partial element equivalent circuit,PEEC)理论,提出一种基于多端口网络模型的功率模块布局电感快速提取方法。该方法通过构建与芯片导通状态无关的多端口网络模型,从而将模块整体和分布电感的提取问题由多次大规模PEEC求解转化为单次预处理分解加端口网络求解。此外,为减少微元数量,针对模块线路的平面注入结构,对键合线、金属层直行区和注入区使用分区域离散策略。算例分析和实验验证表明,所提方法计算误差小于5%,满足工程应用需求,计算时间相比ANSYSQ3D软件减少85%以上,适合用于功率模块的快速寻优设计。
文摘大量间歇性分布式电源的接入,给配电网带来了新的挑战。柔性多状态开关(Soft Open Point, SOP)是一种新型的电力电子装置,具有强大的功率调控和潮流优化能力。文中提出了一种基于SOP的有源配电网双层优化方法。考虑SOP运行控制的约束条件,建立了多端口SOP等效模型。以年综合费用最小为目标建立SOP上层规划模型,以多时段配电网电压偏差最小、网损最低为目标建立基于最优潮流的下层优化模型,并采用改进的遗传粒子群混合优化算法对双层优化模型进行求解。在IEEE 33节点算例上,对比分析了规划前后三端口SOP的优化能力。结果表明,SOP能有效解决配电网电压越限问题,同时降低系统损耗,并且合理的SOP规划对配电网运行优化效果更为显著。
