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数据驱动的用户无功补偿装置远程故障感知 被引量:1
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作者 翟中祥 刘翔斌 +3 位作者 蒙文川 魏梅芳 李彬 苏盛 《电网技术》 EI CSCD 北大核心 2023年第5期2128-2138,共11页
针对部分用户不能及时发现自身无功补偿装置的故障异常、降低用电能效和抬高用能成本的问题,提出数据驱动的用户无功补偿装置远程故障感知方法。该方法基于用户日用电模式会在有限的生产经营状态间切换的假设,利用无功补偿装置故障异常... 针对部分用户不能及时发现自身无功补偿装置的故障异常、降低用电能效和抬高用能成本的问题,提出数据驱动的用户无功补偿装置远程故障感知方法。该方法基于用户日用电模式会在有限的生产经营状态间切换的假设,利用无功补偿装置故障异常时用户侧功率因数降低、从电网吸收无功升高的特点,选取计量数据中的无功功率和功率因数作为特征量感知故障。采用正常运行时用户的历史计量数据构建正常样本库。同一生产经营状态下,无功补偿装置正常运行和故障异常时用户的无功及功率因数分布存在差异。采用近邻传播聚类对检测样本与正常样本库进行聚类,若检测样本产生单独类簇,即可判断当日存在无功补偿装置故障。基于实际发生的无功补偿装置故障用户计量数据的测试表明了所提方法的有效性。 展开更多
关键词 用户节能 功率因数 无功补偿 故障感知 近邻传播聚类
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供热系统中热网、换热站、热用户的监控系统是有效的节能措施 被引量:2
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作者 李一鸣 《活力》 2012年第4期79-80,共2页
1.问题的提出。首先必须保证整个一次热网的水力工况的平衡。其次二次热网的水力工况的平衡。在调节上.由热源厂在保证一次热网水力工况平衡的条件下。分阶段(初寒期、高寒期、低寒期)进行调节。在每个寒期里因室外温度的变化,有... 1.问题的提出。首先必须保证整个一次热网的水力工况的平衡。其次二次热网的水力工况的平衡。在调节上.由热源厂在保证一次热网水力工况平衡的条件下。分阶段(初寒期、高寒期、低寒期)进行调节。在每个寒期里因室外温度的变化,有时可能造成热量不够,而有时可能热量过剩.这样就会产生不同程度的热能不足和热能浪费。另外,供热一般是24小时,以较恒定的热量向用户供热,若向非住宅单位供热,当工作人员下班后, 展开更多
关键词 热网 换热站:热用户:节能
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城市建筑集中供热采暖节能技术应用分析
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作者 李坚 《住宅与房地产》 2023年第5期135-137,共3页
建筑集中供热作为城市运行的基础性设施,得到了国家的重点支持,建筑集中供热能够改善人们的生活,对城市居民而言具有重要意义。但是如今城市建筑集中供暖采暖方面仍然存在一些问题,比如能源消耗过大、环境污染等,严重影响了供热采暖效... 建筑集中供热作为城市运行的基础性设施,得到了国家的重点支持,建筑集中供热能够改善人们的生活,对城市居民而言具有重要意义。但是如今城市建筑集中供暖采暖方面仍然存在一些问题,比如能源消耗过大、环境污染等,严重影响了供热采暖效果。结合以上内容,文章主要探讨城市建筑集中供热采暖节能技术,分别对热力网节能技术、热力源节能技术和用户端节能技术的具体应用进行分析,希望可以提高供热采暖效果,促进城市绿色化和可持续发展,并且给予相关人士一些帮助和借鉴。 展开更多
关键词 集中供热采暖 热力网节能技术 用户节能技术
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LTE系统中的功率节省机制——非连续接收 被引量:1
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作者 王理惠 靳浩 +1 位作者 李勇 彭木根 《数据通信》 2013年第5期35-40,共6页
LTE系统自Release 8就引入了非连续接收(DRX)机制,为终端节省电量。但随着Release版本的不断演进,新技术的不断发展,3GPP RAN2工作组对DRX工作机制和标准也不断进行着研究和完善。本文分别介绍了终端处于RRC_Idle和RRC_Connected状态下... LTE系统自Release 8就引入了非连续接收(DRX)机制,为终端节省电量。但随着Release版本的不断演进,新技术的不断发展,3GPP RAN2工作组对DRX工作机制和标准也不断进行着研究和完善。本文分别介绍了终端处于RRC_Idle和RRC_Connected状态下DRX工作的基本原理和DRX标准化研究现状,并对DRX功能上可以增强的方面进行了说明,最后对非连续接收技术做出了展望。 展开更多
关键词 LTE 非连续接收DRX 用户节能
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Energy-Efficient Architecture and Technologies for Device to Device(D2D) Based Proximity Service 被引量:5
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作者 ZHANG Bo WANG Yufeng +1 位作者 JIN Qun MA Jianhua 《China Communications》 SCIE CSCD 2015年第12期32-42,共11页
Considering that modern mobile terminals possess the capability to detect users' proximity,and offer means to directly communicate and share content with the people in close area,Device-to-Device(D2D) based Proxim... Considering that modern mobile terminals possess the capability to detect users' proximity,and offer means to directly communicate and share content with the people in close area,Device-to-Device(D2D) based Proximity Services(ProSe) have recently witnessed great development,which enable users to seek for and utilize relevant value in their physical proximity,and are capable to create numerous new mobile service opportunities.However,without a breakthrough in battery technology,the energy will be the biggest limitation for ProSe.Through incorporating the features of ProSe(D2D communication technologies,abundant built-in sensors,localization-dependent,and context-aware,etc.),this paper thoroughly investigates the energy-efficient architecture and technologies for ProSe from the following four aspects:underlying networking technology,localization,application and architecture features,context-aware and user interactions.Besides exploring specific energy-efficient schemes pertaining to each aspect,this paper offers a perspective for research and applications.In brief,through classifying,summarizing and optimizing the multiple efforts on studying,modeling and reducing energy consumption for ProSe on mobile devices,the paper would provide guide for developers to build energy-efficient ProSe. 展开更多
关键词 aware localization terminals users networking utilize Bluetooth D2D battery enable
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Energy Efficiency Optimization for D2D Communications Based on SCA and GP Method 被引量:3
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作者 Xiaozheng Gao Hangcheng Han +1 位作者 Kai Yang Jianping An 《China Communications》 SCIE CSCD 2017年第3期66-74,共9页
In this paper, we propose an energy-efficient power control scheme for device-to-device(D2D) communications underlaying cellular networks, where multiple D2D pairs reuse the same resource blocks allocated to one cellu... In this paper, we propose an energy-efficient power control scheme for device-to-device(D2D) communications underlaying cellular networks, where multiple D2D pairs reuse the same resource blocks allocated to one cellular user. Taking the maximum allowed transmit power and the minimum data rate requirement into consideration, we formulate the energy efficiency maximization problem as a non-concave fractional programming(FP) problem and then develop a two-loop iterative algorithm to solve it. In the outer loop, we adopt Dinkelbach method to equivalently transform the FP problem into a series of parametric subtractive-form problems, and in the inner loop we solve the parametric subtractive problems based on successive convex approximation and geometric programming method to obtain the solutions satisfying the KarushKuhn-Tucker conditions. Simulation results demonstrate the validity and efficiency of the proposed scheme, and illustrate the impact of different parameters on system performance. 展开更多
关键词 device-to-device(D2D) communications power control energy efficiency(EE) successive convex approximation(SCA) geometric programming(GP)
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Optimal energy-efficient power control for cognitive radio based on static and dynamic features of primary users
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作者 Ge Wendong Ji Hong Si Pengbo 《High Technology Letters》 EI CAS 2011年第4期350-353,共4页
In this paper, the energy-efficient power control problem in cognitive radio (CR) networks is studied not only to provide energy-efficient transmission, but also to guarantee the normal operation of primary users (... In this paper, the energy-efficient power control problem in cognitive radio (CR) networks is studied not only to provide energy-efficient transmission, but also to guarantee the normal operation of primary users (PUs). Moreover, the static energy-efficient power control (SEPC) algorithm is proposed in static scenario to maximize the capacity of secondary users (SUs) and to reduce the power consumption according to the interference from PU to SU. Furthermore, based on the analysis of PU's dynamic feature with Markov chain and SEPC algorithm,the dynamic energy-efficient power control (DEPC) algorithm is proposed taking into account the probability of detection and false alarm caused by sensing errors. Extensive simulation results show that the performance of the proposed algorithms is significantly improved compared with the existing algorithm. 展开更多
关键词 cognitive radio(CR) power control ENERGY-EFFICIENT MARKOV false alarm
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