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基于带电报警检测技术的接地线故障诊断与预警研究
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作者 陈飞建 罗鑫 《中文科技期刊数据库(引文版)工程技术》 2024年第1期0160-0163,共4页
接地线故障是影响电力系统安全稳定的重要因素之一。为了快速提示接地线状态,提出一种基于带电报警检测技术的接地线故障诊断与预警研究。首先,依据电压源等效法和线电流测量法对接地线故障进行:modeling,建立接地线故障模型。然后,在... 接地线故障是影响电力系统安全稳定的重要因素之一。为了快速提示接地线状态,提出一种基于带电报警检测技术的接地线故障诊断与预警研究。首先,依据电压源等效法和线电流测量法对接地线故障进行:modeling,建立接地线故障模型。然后,在此基础上,采用带电报警检测技术,用实时在线监测接地线运行状态。接着在分析、比较接地故障原因基础上,提出相应预防措施。仿真结果表明,本研究方案可以快速、准确的发现接地线故障并作出故障预警,提高了电力线路的运行安全和准确预警能力,为电力线路的安全运行提供了重要的技术支持。 展开更多
关键词 地线故障 带电报警检测技术 故障诊断与预警
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110kV电压互感器计量二次电压接地线故障分析 被引量:2
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作者 王友 阳龙 +2 位作者 邓黎明 付俊杰 彭慧 《湖北电力》 2013年第3期65-67,共3页
电压互感器二次电压降是造成电能计量误差的重要因素之一,文章针对110kV电压互感器计量二次电压接地线故障对电能计量的影响进行分析,提出改进措施及方法,为实际工作提供有效参考。
关键词 电压互感器 计量二次电压 地线故障 防范措施
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F30-ⅡB型X线机地线故障1例
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作者 蔡玉有 代铁山 《中外医用放射技术》 2004年第1期17-17,共1页
关键词 F30-ⅡB型 X线机 地线故障 故障检修
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一种计及地线影响的输电线路可靠性动态评估方法 被引量:8
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作者 易永亮 熊小伏 +4 位作者 徐望圣 胡江 孟祥龙 王建 王伟 《电力系统保护与控制》 EI CSCD 北大核心 2017年第10期77-84,共8页
雷击、冰灾等极端气象事件是导致输电线路故障的主要原因,输电线路的架空地线在夏季的防雷作用以及冬季更易覆冰的特点直接影响线路的可靠性水平。因此有必要研究地线对输电线路可靠性的影响及分析方法,并提出一种计及地线影响的输电线... 雷击、冰灾等极端气象事件是导致输电线路故障的主要原因,输电线路的架空地线在夏季的防雷作用以及冬季更易覆冰的特点直接影响线路的可靠性水平。因此有必要研究地线对输电线路可靠性的影响及分析方法,并提出一种计及地线影响的输电线路可靠性动态评估方法。以"月份"作为时间尺度,对地线自身和输电导线逐月故障率分别统计并进行拟合。分析夏季、冬季地线状态对输电导线可靠性的影响,并引入相应的修正系数对输电导线故障率进行修正。利用全概率公式对线路停运概率进行计算,得到了与地线及导线故障率有关的线路全年逐月停运概率函数。算例验证了所提方法的可行性。 展开更多
关键词 输电线路 可靠性 地线故障 逐月故障 动态评估
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35kV电网接地故障及防范措施分析 被引量:1
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作者 贾志华 《中国新技术新产品》 2016年第21期46-47,共2页
作为电力系统的重要组成部分,配电网在实际的安全运行中能否达到某些生产活动的具体要求,关系着电力企业的经济效益,制约着企业长期稳定的发展。采取有效的技术措施优化配电网的服务功能,有利于增强用户用电的安全稳定性,满足用户用电... 作为电力系统的重要组成部分,配电网在实际的安全运行中能否达到某些生产活动的具体要求,关系着电力企业的经济效益,制约着企业长期稳定的发展。采取有效的技术措施优化配电网的服务功能,有利于增强用户用电的安全稳定性,满足用户用电过程中的多样化需求。结合现阶段配电网运行的实际发展现状,可知线路接地故障的发生,影响了配电网的正常故障,间接地增加了电力企业的生产成本。这类故障现象的频繁出现,不仅加大了配电网正常运行中各类事故发生的几率,也对系统供电可靠性埋下了较大的安全隐患,影响着配电自动化生产目标的实现。基于此,本文将对35kV电网接地故障及防范措施进行必要地分析,以便为相关的研究工作开展提供有效的参考信息。 展开更多
关键词 配电网 35kV电网 地线故障 防范措施 安全隐患
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Application of DC component to select fault branch in arc suppression coil grounding system 被引量:2
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作者 Zhi-Jie WANG Yan-Wen WANG 《Journal of Coal Science & Engineering(China)》 2013年第3期396-401,共6页
When single phase earth fault occurs in the arc suppression coil grounding system, the amplitude of the transient capacitance current is high and decays fast, but the attenuation of the transient inductance current is... When single phase earth fault occurs in the arc suppression coil grounding system, the amplitude of the transient capacitance current is high and decays fast, but the attenuation of the transient inductance current is much slower. This paper analyses the DC component of fault branch, and has found it is much bigger than that of the normal branches in transient state. All the simulation results obtained from three compensation types, different fault time and different wave cycles show that the DC component of fault branch is much higher than that of those normal branches. These results verify the effectiveness of taking the DC component as the method of fault line selection in the arc suppression coil grounding system. 展开更多
关键词 DC component arc suppression coil fault line selection transient state
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Fault location of two-parallel transmission line for double phase-to-earth fault using one-terminal data
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作者 张庆超 段晖 +1 位作者 耿超 宋文南 《Journal of Zhejiang University Science》 CSCD 2003年第5期520-525,共6页
An accurate algorithm for fault location of double phase-to-earth fault on transmission line of direct ground neutral system is presented. The algorithm, which employs the faulted phase network and zero-sequence netwo... An accurate algorithm for fault location of double phase-to-earth fault on transmission line of direct ground neutral system is presented. The algorithm, which employs the faulted phase network and zero-sequence network as fault-location model in which the source impedance at the remote end is not involved, ef-fectively eliminates the effect of load flow and fault resistance on the accuracy of fault location. The algorithm achieves accurate location by measuring only one local end data and is used in a procedure that provides automatic determination of faulted types and phases, and does not require the engineer to specify them. Simulation results showed the effectiveness of the algorithm under the condition of double phase-to-earth fault. 展开更多
关键词 Fault location Transmission line Double phas e-to-earth fault
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Power System Modelling and Fault Analysis of NamPower's 330 kV HVAC Transmission Line
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作者 Innocent Davidson Immanuel Mbangula 《Journal of Energy and Power Engineering》 2014年第8期1432-1442,共11页
Electric power systems usually cover large geographical areas and transmission facilities are continuously increasing. These power systems are exposed to different environmental conditions which may cause faults to oc... Electric power systems usually cover large geographical areas and transmission facilities are continuously increasing. These power systems are exposed to different environmental conditions which may cause faults to occur on the system. Different types of studies are usually done on electric power systems to determine how the system behaves before, during and after a fault condition. The behaviour of variables of interest such as currents, voltage, rotor angle and active and reactive power under fault conditions are studied and observed to help determine possible causes of faults in a power system. The objective of this paper is to investigate a fault that occurred on the 330 kV transmission line between Ruacana power station and Omburu sub-station, the fault caused all the generators at Ruacana power station to trip and consequently caused a blackout at the power station that lasted for 6 h. Preliminary findings showed that the observed fault was an earth fault but the exact type of earth fault was however not known at the time. This research investigation sets out to determine the exact fault that occurred; the most probable cause of the fault, and propose possible solutions to prevent reoccurrence of such a fault. The section of the power network in which the fault occurred was modelled using DigSilent Power Factory software tool, and transient fault analysis was carried out on the model for different fault conditions. Results obtained were then compared with data obtained from NamPower records to ascertain the type of fault. 展开更多
关键词 Fault analysis power system transient stability
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Evaluation of Four Geomembrane-Mounted PV Systems for Land Reclamation in Southern Arizona
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作者 Adria E. Brooks Nathan Allen +1 位作者 Vincent P. Lonij Alexander D. Cronin 《Journal of Energy and Power Engineering》 2013年第5期834-840,共7页
Four different PV (photovoltaic) systems deployed around Tucson Arizona on geomembranes are used to test the feasibility of converting mine tailings and landfills into solar energy generating sites. Differences betw... Four different PV (photovoltaic) systems deployed around Tucson Arizona on geomembranes are used to test the feasibility of converting mine tailings and landfills into solar energy generating sites. Differences between these deployed systems include: two types of geomembrane materials, two different module anatomies and two different locations. Module mounting techniques unique to mine tailing sites are described. Several system failures observed during the first two years of operation are explained here in detail. Validated predictions for the operating temperature of these systems and their associated electrical performance are presented. It was determined that PV modules mounted on light-colored thermoplastic with shielded wiring operate at lower temperatures, are structurally stable, and experience fewer wiring failures. 展开更多
关键词 Photovoltaic systems system performance current-voltage characteristics surface-mount technology land reclamation mining applications polyethylene geomembrane.
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Analysis of Short Circuit Faults in a System Fed by Wind Turbine
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作者 Ahmet Nayir Eugeniusz Rosolowski Leszek Jedut 《Journal of Energy and Power Engineering》 2013年第9期1809-1815,共7页
Short circuit and ground failures that are quite common in power transmission lines are investigated. These failures are designed considering a system that is supplied by this wind system, and analyses are interpreted... Short circuit and ground failures that are quite common in power transmission lines are investigated. These failures are designed considering a system that is supplied by this wind system, and analyses are interpreted. In the study, a system is set up and it is fed by the wind turbine. Furthermore, the mathematical model of wind turbine and generator is prepared and the results obtained from the simulation are evaluated. The short circuit and ground fault analyzes were performed separately for each of the three phases. ATP (alternative transient program)-EMTP (electromagnetic transients program) program is used in the analysis and the results obtained were found to be quite compatible. 展开更多
关键词 FAILURES GENERATOR wind system wind turbine power transmission lines.
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