在现代电力系统中,配网低电压问题常由多种因素引起,包括不平衡负荷、过长的供电距离或设备老化等。这些问题不仅影响电能质量,而且会降低用户满意度和电网运行效率。而智能电表的广泛部署为实时监控和管理配网提供了新的可能。文章深...在现代电力系统中,配网低电压问题常由多种因素引起,包括不平衡负荷、过长的供电距离或设备老化等。这些问题不仅影响电能质量,而且会降低用户满意度和电网运行效率。而智能电表的广泛部署为实时监控和管理配网提供了新的可能。文章深入探讨基于智能电表高速电力线载波(High-speed Power Line Carrier,HPLC)模块96点数据的配网低电压治理方法,根据自动识别和分类低电压问题,开发数据驱动的电压调节策略,并结合预测模型和预防措施,提出一套综合治理方案。然后,通过系统测试,验证所提方法的有效性和实用性。展开更多
Pre-and post-selected(PPS) measurement, especially the weak PPS measurement, has been proved to be a useful tool for measuring extremely tiny physical parameters. However, it is difficult to retain both the attainable...Pre-and post-selected(PPS) measurement, especially the weak PPS measurement, has been proved to be a useful tool for measuring extremely tiny physical parameters. However, it is difficult to retain both the attainable highest measurement sensitivity and precision with the increase of the parameter to be measured. Here, a modulated PPS measurement scheme based on coupling-strength-dependent modulation is presented with the highest sensitivity and precision retained for an arbitrary coupling strength. This idea is demonstrated by comparing the modulated PPS measurement scheme with the standard PPS measurement scheme in the case of unbalanced input meter. By using the Fisher information metric, we derive the optimal pre-and post-selected states, as well as the optimal coupling-strength-dependent modulation without any restriction on the coupling strength. We also give the specific strategy of performing the modulated PPS measurement scheme, which may promote practical application of this scheme in precision metrology.展开更多
文摘在现代电力系统中,配网低电压问题常由多种因素引起,包括不平衡负荷、过长的供电距离或设备老化等。这些问题不仅影响电能质量,而且会降低用户满意度和电网运行效率。而智能电表的广泛部署为实时监控和管理配网提供了新的可能。文章深入探讨基于智能电表高速电力线载波(High-speed Power Line Carrier,HPLC)模块96点数据的配网低电压治理方法,根据自动识别和分类低电压问题,开发数据驱动的电压调节策略,并结合预测模型和预防措施,提出一套综合治理方案。然后,通过系统测试,验证所提方法的有效性和实用性。
基金supported by the National Natural Science Foundation of China(Grant Nos.11674234 and 11605205)the Fundamental Research Funds for the Central Universities,China(Grant No.2012017yjsy143)+4 种基金the National Key Research and Development Program of China(Grant No.2017YFA0305200)the Youth Innovation Promotion Association of Chinese Academy of Sciences(CAS)(Grant No.2015317)the Natural Science Foundation of Chongqing,China(Grant Nos.cstc2015jcyjA00021 and cstc2018jcyjAX0656)the Entrepreneurship and Innovation Support Program for Chongqing Overseas Returnees,China(Grant No.cx017134)the Fund of CAS Key Laboratory of Microscale Magnetic Resonance,China,and the Fund of CAS Key Laboratory of Quantum Information,China
文摘Pre-and post-selected(PPS) measurement, especially the weak PPS measurement, has been proved to be a useful tool for measuring extremely tiny physical parameters. However, it is difficult to retain both the attainable highest measurement sensitivity and precision with the increase of the parameter to be measured. Here, a modulated PPS measurement scheme based on coupling-strength-dependent modulation is presented with the highest sensitivity and precision retained for an arbitrary coupling strength. This idea is demonstrated by comparing the modulated PPS measurement scheme with the standard PPS measurement scheme in the case of unbalanced input meter. By using the Fisher information metric, we derive the optimal pre-and post-selected states, as well as the optimal coupling-strength-dependent modulation without any restriction on the coupling strength. We also give the specific strategy of performing the modulated PPS measurement scheme, which may promote practical application of this scheme in precision metrology.