在实现“双碳”目标的背景下,城市轨道交通需要实现节能低碳运行。现有牵引供电系统(traction power supply system,TPSS)采用下垂控制策略存在再生制动能量利用率低、缺乏对系统潮流主动有效控制及优化手段等问题。该文分析双向变流器...在实现“双碳”目标的背景下,城市轨道交通需要实现节能低碳运行。现有牵引供电系统(traction power supply system,TPSS)采用下垂控制策略存在再生制动能量利用率低、缺乏对系统潮流主动有效控制及优化手段等问题。该文分析双向变流器的下垂参数对系统用电量的影响,进而提出一种实现牵引负荷功率最优分配的协同控制方法,该方法对双向变流器的下垂参数实时优化和调整,促进机车再生制动能量的流动,有效提高再生制动能量利用率,显著提升系统协同控制性能。经仿真计算,采用该方法可年节约0.17亿k W·h电量,有效助力城市轨道交通牵引供电系统安全、经济运行。展开更多
Performance/security trade-off is widely noticed in CFI research,however,we observe that not every CFI scheme is subject to the trade-off.Motivated by the key observation,we ask three questions:1does trade-off really ...Performance/security trade-off is widely noticed in CFI research,however,we observe that not every CFI scheme is subject to the trade-off.Motivated by the key observation,we ask three questions:1does trade-off really exist in different CFI schemes?2if trade-off do exist,how do previous works comply with it?3how can it inspire future research?Although the three questions probably cannot be directly answered,they are inspiring.We find that a deeper understanding of the nature of the trade-off will help answer the three questions.Accordingly,we proposed the GPT conjecture to pinpoint the trade-off in designing CFI schemes,which says that at most two out of three properties(fine granularity,acceptable performance,and preventive protection)could be achieved.展开更多
Performance/security trade-off is widely noticed in CFI research, however, we observe that not every CFI scheme is subject to the trade-off. Motivated by the key observation, we ask three questions: ➊ does trade-off r...Performance/security trade-off is widely noticed in CFI research, however, we observe that not every CFI scheme is subject to the trade-off. Motivated by the key observation, we ask three questions: ➊ does trade-off really exist in different CFI schemes? ➋ if trade-off do exist, how do previous works comply with it? ➌ how can it inspire future research? Although the three questions probably cannot be directly answered, they are inspiring. We find that a deeper understanding of the nature of the trade-off will help answer the three questions. Accordingly, we proposed the GPT conjecture to pinpoint the trade-off in designing CFI schemes, which says that at most two out of three properties (fine granularity, acceptable performance, and preventive protection) could be achieved.展开更多
文摘在实现“双碳”目标的背景下,城市轨道交通需要实现节能低碳运行。现有牵引供电系统(traction power supply system,TPSS)采用下垂控制策略存在再生制动能量利用率低、缺乏对系统潮流主动有效控制及优化手段等问题。该文分析双向变流器的下垂参数对系统用电量的影响,进而提出一种实现牵引负荷功率最优分配的协同控制方法,该方法对双向变流器的下垂参数实时优化和调整,促进机车再生制动能量的流动,有效提高再生制动能量利用率,显著提升系统协同控制性能。经仿真计算,采用该方法可年节约0.17亿k W·h电量,有效助力城市轨道交通牵引供电系统安全、经济运行。
基金supported by ARO W911NF-13-1-0421(MURI),NSF CNS-1814679,NSF CNS-2019340.
文摘Performance/security trade-off is widely noticed in CFI research,however,we observe that not every CFI scheme is subject to the trade-off.Motivated by the key observation,we ask three questions:1does trade-off really exist in different CFI schemes?2if trade-off do exist,how do previous works comply with it?3how can it inspire future research?Although the three questions probably cannot be directly answered,they are inspiring.We find that a deeper understanding of the nature of the trade-off will help answer the three questions.Accordingly,we proposed the GPT conjecture to pinpoint the trade-off in designing CFI schemes,which says that at most two out of three properties(fine granularity,acceptable performance,and preventive protection)could be achieved.
基金This work was supported by ARO W911NF-13-1-0421 (MURI), NSF CNS-1814679, and NSF CNS-2019340.
文摘Performance/security trade-off is widely noticed in CFI research, however, we observe that not every CFI scheme is subject to the trade-off. Motivated by the key observation, we ask three questions: ➊ does trade-off really exist in different CFI schemes? ➋ if trade-off do exist, how do previous works comply with it? ➌ how can it inspire future research? Although the three questions probably cannot be directly answered, they are inspiring. We find that a deeper understanding of the nature of the trade-off will help answer the three questions. Accordingly, we proposed the GPT conjecture to pinpoint the trade-off in designing CFI schemes, which says that at most two out of three properties (fine granularity, acceptable performance, and preventive protection) could be achieved.
