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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 接地线路故障 防范措施 安全隐患
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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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