共查询到20条相似文献,搜索用时 250 毫秒
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文章介绍了变电站电气设备的温度监测现状,并对目前监测手段存在的不足进行了简要分析,研究了基于无线传感器网络电力设备实时在线温度监测技术.温度传感器安装在变电站内存在过热风险的设备上,无线传感器自组织建立传感器网络,利用该网络实现实时在线监测电力设备的运行温度、及时预警等功能.设计了基于无线传感器网络的变电站设备温度在线... 相似文献
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周刚 《电网与水力发电进展》2014,30(10):88-94
赤峰电业局为保证配电网安全可靠经济运行,安装了配电线路故障在线监测系统,实现了配电网运行的在线监测,且能够准确定位故障、迅速排除故障、缩小停电范围。 相似文献
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设计了一套柔性直流输电换流阀运行状态在线监测系统,通过对换流阀子模块的电容电压、IGBT开关频率、温度以及阀冷、阀控等运行参数的在线监测,实时分析并预测换流阀的运行状态。提出了一种基于专家数据库的故障预测方法,可根据在线监测到的换流阀运行参数来提前预测其异常发展趋势,有利于故障的及早发现和预防。完成了在线监测系统的软硬件设计,并搭建了小容量的柔性直流输电物理动模试验平台进行了测试验证,测试结果表明,该系统可实现对柔性直流输电换流阀运行参数的在线监测和分析,为换流阀可靠运行提供了一种有效的监测手段。 相似文献
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随着电力设备在线监测技术的快速发展,对于在线监测带来的大量信息数据进行有效管理利用显得越来越重要。本文介绍了一个功能全面的电力设备标签点管理软件的设计、开发操作方法及其采用的核心技术。具体完成了软件的业务流程、需求分析和功能模块的划分以及界面设计。该软件采用C/S模式,旨在辅助现场工程服务人员对设备标签点的管理,提高工作效率。最后,以某发电厂电气设备在线监测系统数据为例,进行实际应用操作,结果表明,该电力设备数据库管理软件能够极大的提高电力设备在线监测数据的管理利用率。 相似文献
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绝缘油色谱在线监测装置在电力行业应用广泛、规模庞大,其装置内安装了气泵、油泵等部件在工作时会产生强烈振动。持续振动会导致绝缘油色谱在线监测装置中振动噪音、部件损坏与输油管接口松动漏油故障,造成设备运行风险、环保等问题。本文介绍了绝缘油色谱在线监测装置减振隔振技术,通过应用和技术优化,取得良好的效果。为绝缘油色谱在线监测装置设计、制造和运行维护提供参考。 相似文献
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古晓威 《能源技术(上海)》2014,(1):51-53
配电自动化是智能电网的重要基础之一,需要通过配电自动化系统采集尽可能多的配电信息,并向下延伸到低压用电信息的汇集。提出了一种新型智能配电自动化终端的设计方案,不仅可以检测和指示短路以及接地故障,还可以实时监测线路的正常运行情况和故障发生过程,其故障定位及在线监测系统还可以提供瞬时性短路故障、瞬时性和间歇性接地故障的在线监测和预警功能,以及故障后事故分析和总结功能,保证了配电线路的安全稳定运行。 相似文献
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介绍750 kV主变压器在运行中根据色谱分析以及轻瓦斯信号等,通过三比值判断为电弧放电故障,现场停运检查和返厂解体检查,对故障原因进行了分析,笔者针对局部放电监测的应用进行了介绍,提出针对大容量变压器可采用局放在线监测,提高运行的可靠性,同时对变压器安装、运行提出建议与对策。 相似文献
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《电力信息与通信技术》2015,(3)
配电线路在线监测系统是国网浙江省电力公司加强配电线路监测管理、实施智能电网整体战略的重要组成部分。文章基于国家电网公司配电线路故障指示器技术规范,结合国网浙江省电力公司配电线路在线监测装置技术规范、系统通信协议、无线终端安全接入标准和业务需求规范,提出了配电线路在线监测系统组成、架构和应用流程。通过配电线路在线监测系统的建设,国网浙江省电力公司提高了供电可靠性,提升了配网运行管理水平,优化了配电网运行方式,并提高了服务水平。 相似文献
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Some of the problems facing partial discharge (PD) measurements in rotating machines, especially during online measurements are: i) calibration of the measurements; ii) high noise levels interfering with both the measurement system and the winding under the test; as well as iii) attenuation and distortion of PD signals during transmission from the source point to the winding terminals. This paper presents a new technique and a measuring system for online PD monitoring of large rotating machines, developed by the authors. With this technique, the above mentioned problems are improved considerably. PD detection is implemented for every stator coil and the coil that PD comes from can also be identified. Inductive coils are used for decoupling of PD pulses and processing of the detected signals is in accordance with the developed technique, denoted "Intech". Remote monitoring and navigation via a telephone link is one of the system features. The system was tested on both hydro and turbo generators with good results. The detection sensitivity of the system for the conventional machines is about 1 nC under operating condition. 相似文献
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为提高水电机组局部放电在线监测结果的准确性,必须实现局部放电脉冲的有效识别。在分析大量水电机组局部放电在线监测原始数据的基础上,总结了现场出现的各类脉冲在时域、频域上的波形特征,提出了脉冲时频复合特征提取方法,提取了基于频率空间能量分布统计参数作为脉冲识别的频域特征,并计算了脉冲识别的时域特征参数,现场原始数据的识别结果验证了该特征提取方法的有效性。 相似文献
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This paper describes a remote monitoring system that can be set up in an operating center to monitor the state of valve regulated lead acid batteries (VRLA) used as a backup power supply for telecommunications. This system has a battery voltage monitoring function, a lifetime prediction function based on ambient temperature, and a discharge circuit diagnosis function. In addition, the system can be equipped with an internal resistance measurement function and an electrolyte leakage detection function to further insure power-supply reliability. Various states of batteries observed with the system are transmitted to the remote operating center by a remote monitoring function. This function enables obtaining immediate information about the condition of batteries and helps to avoid unexpected failures. 相似文献
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《Power Engineering Review, IEEE》2002,22(8):12-14
A new technique for analyzing partial discharge (PD) signals based on ultra-high frequency (UHF) measurements is presented, using results from site tests. Signals from simultaneously active discharge sources can be mapped according to their point of origin in a manner that will simplify the interpretation of phase-resolved discharge patterns. The scheme has the potential to allow automated location and tracking of multiple discharge sources in power transformers and other metal-clad high-voltage plants. 相似文献
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Using improved self-organizing map for partial discharge diagnosis of large turbogenerators 总被引:2,自引:0,他引:2
Partial discharge (PD) classification is a powerful way to predict insulation problems of the windings of rotating machinery. While online PD tests have been carried out for over 40 years, effective diagnostic methods are still under development. In this paper, a practical diagnostic method is proposed based on an improved self-organizing map (SOM) with improved clustering indications. Three feature extraction methods are employed for the SOM implementation, including Weibull analysis, statistical operators, and fractal parameters. Experimental PD data of industrial model bars are used to validate the efficiency of using SOM for PD classification. The method is applied to investigate the turbine generator analyzer (TGA) data obtained from a power plant of British Nuclear Fuels Ltd. Diagnostic results are included to demonstrate that the relationship between the new PD measurement and historical data can be visualized and more confidential diagnostic information can be provided, especially when small-size database, new class of data, and doubtful measurements are involved in a practical environment. 相似文献