共查询到20条相似文献,搜索用时 31 毫秒
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Koichi Yokosawa Sadaki Nakano Yasushi Goto Kazuo Saitoh Keiji Tsukada 《IEEJ Transactions on Electrical and Electronic Engineering》2008,3(2):229-235
A prototype system for detecting hydrogen‐gas leaks in hydrogen filling stations was fabricated. The prototype is composed of a wireless network with 10 sensor nodes for monitoring the spatial distribution of hydrogen‐gas concentration. To make each sensor node to be driven by a battery, field‐effect transistor (FET) sensors and a microprocessor with low power consumption were used. Additionally, two functions were devised and implemented in the microprocessor in each node: one reduces the power consumption of each sensor node and the other controls the transmission to avoid communication congestion when a gas leak occurs. The use of batteries and wireless communications enables the nodes to be placed at optimal sensing locations without regard to the wiring needed with existing gas sensors. Copyright © 2008 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc. 相似文献
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谭玉玲 《广东输电与变电技术》2007,(1):52-55
通过对一个用户变电站的计量故障查找实例分析,指出这类用户由于用电量大,计量准确对供电局的经济核算有很大的重要性,并提出加强大用户电量计量管理的一些意见。 相似文献
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分析了低压电能计量柜在当前供用电应用中存在的缺陷,提出了对电能计量装置的一些新要求。对10~35kV高压电力计量箱与低压电能计量柜的优缺点进行了比较。介绍了10~35kV高压电力计量箱的配置、接线方式,以及维修和使用计量箱的经验。 相似文献
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用户耗能的时空分布特性对于电网规划具有重要的参考价值,是电网建设的重要依据。电力运营商通过新型计量设备分析居民的用电行为,从而促进电网高效运营。针对区域用户画像问题,提出基于综合能源计量数据的区域用能特性分析方法。利用“多表合一”用能采集系统,引入用户的燃气消耗数据,基于层次聚类与自组织映射(self organized maps,SOM)聚类方法刻画用能特征分布,通过仿真实验说明所提方法在用能特性分析问题上具有实用价值,有利于挖掘高耗能区域,能帮助电力运营商制定规划方案。 相似文献
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针对315 kVA以下专用变压器用户和带TA接线的三相负荷用户远程用电信息采集系统存在的问题,从计量箱柜、互感器、计量回路、智能电表等方面进行影响因素分析,提出了远程信息计量装置技术优化升级改造方案。应用结果表明:远程计量系统改造后,有效提高了用户电能计量信息采集的有效性和可靠性,降低了由于用电客户拖欠电费给电力公司带来经济损失的风险。 相似文献
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用户电能计量装置运行情况的诊断分析需依赖现场校验来实现,工作繁琐且时效性差。用户用电信息采集系统建立之后,即可通过远程采集用电信息来分析用户电能计量装置运行情况,但是庞大的采集数据仅靠人工分析和筛查异常信息所花时间较长,而且人工分析中常常会有疏漏,同时一些数据分析工具难以满足要求。本文提出了规律性非连续算法和分类连续差值算法,可有效锁定电能计量装置运行异常及疑似用电异常用户。经过实践表明,该方法高效可靠,运行简单,可准确识别电能计量装置运行异常,为电能计量装置异常排查提供技术保障。 相似文献
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文章从用电营销管理的角度介绍了降低线损的方法,并针对用电营业管理的具体流程环节,即业扩报装、营业抄核收、电能计量管理和用电检查,提出了多项具体降损措施,比如实行线损管理考核制度,建立和完善经济承包责任制等,这些措施都具有一定的借鉴意义。 相似文献
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《IEEJ Transactions on Electrical and Electronic Engineering》2017,12(1):71-79
Design and implementation of an energy‐efficient protocol is one of the main challenges in wireless sensor networks (WSNs). In terms of localization, both energy efficiency and accuracy must be addressed to achieve the final goals of localization. In mobile sensor nodes, where battery power is the most hardware resource limitation, accurate localization needs to be extremely energy efficient. In this work, a virtual multiple‐input multiple‐output (VMIMO) technique is deployed to tackle the problems of getting more energy efficiency and higher accuracy simultaneously.In this case, the optimum selection of the number of transceiver nodes can be obtained with the lowest possible total energy consumption, localization error, and speed of nodes. In addition, VMIMO decreases the power of transmitters, and therefore will lead to the reduction of destructive effects of electromagnetic sensitivity (EMS) on the body. © 2016 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc. 相似文献
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根据用电管理的要求,地方供电部门需要对部分用户安装多功能电能表,由于安装工作量很大,容易造成电能计量接线错误.针对此情况,提出了利用多功能电能表提供的数据判断计量接线正误的方法.该方法简单实用,计量人员、安装人员和抄表人员均容易掌握,可迅速判断出计量接线的正确与否,提高检查工作效率. 相似文献
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电能计量自动化系统是智能电网建设的一个重要基础组成部分。通过该系统实时掌握电网、客户端的用电情况,为智能电网的各种应用发挥重要作用。该系统的投入使用,可以充分发挥供电企业专业优势,为客户提供更加深入、专业的节能服务,从而提高终端电能利用效率,减少资源消耗和环境污染。 相似文献
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随着我国经济的高速发展和人民生活水平的提高,用电客户迅猛增加,为了保障在线电能计量装置准确可靠的运行,电力部门必须投入大量的人力、物力和财力.出于建设智能电网的需要,智能电能表、用电现场管理系统终端被大面积推广应用.只有充分发挥这些新技术、新设备的功能,才能达到提高电力部门的工作效率,减少运营成本的目的.本文主要研究的... 相似文献
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Bon Ju Gu Wang Hoon Lee Kazuaki Sawada Makoto Ishida 《IEEJ Transactions on Electrical and Electronic Engineering》2012,7(3):337-341
This paper presents a low‐power radio frequency (RF) transmitter using dual‐pulse position modulation (DPPM) for a smart micro‐sensing chip (SMSC) with sensors and large scale integrated circuit (LSI) on the same chip. The DPPM method is presented by a fixed pulse and a variable pulse within the same time frame. The distance between the fixed pulse and the variable pulse describes the amplitude of the input signal. A modulator and a ring oscillator were designed for the RF transmitter using the DPPM method. In the modulator, the pulse width modulation (PWM) signal is generated by the intersective method, and narrow pulses are extracted at the rising and falling positions of the generated PWM signal. The designed oscillator has the function of an oscillation controller. The RF transmitter was fabricated with sensors for an SMSC by complementary metal–oxide–semiconductor (CMOS) technology. The power consumption of the fabricated modulator was 4.5 mW. The power consumption of the proposed RF transmitter was measured as 7.0–7.3 mW at an input signal of 0.8–2.5 V. The RF transmitter using the DPPM method was able to reduce the power consumption by a maximum of 50.3% compared to a transmitter using the PWM method, because in the latter the dissipated power was 8.4–14.5 mW at the same input signal. © 2012 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc. 相似文献
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A. V. Zakharenkov V. N. Degterev V. V. Usanov A. A. Shkurin A. A. Efimov G. M. Ivanova 《Thermal Engineering》2006,53(10):774-778
Experience gained from the introduction and operation of microprocessor systems for metering gas consumption and its heating value at Mosenergo’s cogeneration stations is considered. 相似文献