共查询到19条相似文献,搜索用时 296 毫秒
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针对电缆接头过热烧穿绝缘导致发生火灾的问题,武汉高德电气有限公司研制出GD3000电缆过热故障在线监测系统,该系统通过连续测量电缆及电缆接头温度的变化,早期诊断过热故障,实现对电缆运行状态的有效监测。系统采用的各软硬件设备均为当前电缆在线监测中所使用的最新先进技术和产品,并经过时间证明其为可靠安全的系统。可广泛应用于电力、消防、冶金、化工等行业。 相似文献
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电缆的绝缘故障引起的后果十分严重,电缆接头是其最薄弱的环节,故障一般由此开始。现有的电力电缆接头温度在线监测报警系统存在测量数据传输距离受限制等问题。本文提出一种基于无线数传电台的远程电缆接头温度在线监测系统,利用温度传感器和基于485现场总线的A/D模块对的电缆接头温度进行监测,转化后的数据通过无线数传电台发送回监控室,实现了电缆接头温度的准确、可靠、实时、快速的测量,是解决城市地下电缆沟内电力电缆接头温度监控的较好方案。 相似文献
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火电厂、变电站电力电缆长期运行在高电压、大电流环境下,接头容易超温过热,引起爆炸,导致火灾,建立电力电缆火灾在线监测系统具有一定的必要性,因此,设计了发电厂电力电缆温度在线监测系统,该系统现场子站设计采用新型数字式温度传感器,各电缆温度数据最后送至上位PC机进行实时显示、报警,实现了对电缆接头温度的监测与预警,有效防止了火灾的发生。 相似文献
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电缆接头的温度监测智能控制系统的设计 总被引:2,自引:0,他引:2
由于电缆接头的过热崩烧故障,可能引起大面积停电.针对其故障特点,开发设计了电缆接头的温度监测智能控制系统.介绍了系统的软、硬件设计原理,监测功能等参数,该系统能及时提供电缆故障位置和检修指导,避免发生严重事故. 相似文献
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电力电缆接头故障的预警监测系统 总被引:15,自引:1,他引:15
对电缆接头故障进行了一些有益的分析,提出了一种间接在线评估接头电阻和绝缘老化的算法,从理论上验证了接头温度与接头质量的相关性。在此基础上,介绍了基于上述机理而设计的电缆接头温度监测系统。通过实例分析说明了该机理的有效性和可信度,同时本系统的先进性和可靠性也得到了验证。 相似文献
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高云鹏谭甜源刘开培阮江军 《高电压技术》2016,(2):535-542
为间接测量得到电缆导芯温度、预防电缆接头故障,建立了电缆接头2阶和1阶暂态热路简化模型,提出了一种电缆接头导芯温度的反演算法,推导得出导体实时温度。同时,通过参数辨识对电缆接头进行在线监测并得到故障诊断结果。结果表明,建立的电缆接头2阶和1阶暂态热路模型可有效简化反演计算,进而通过电缆接头外皮和金属护套温度反推出导体温度,且所得反演结果与实测结果相符。此外,根据辨识参数相对正常运行状态时的变化情况,可判断出电缆接头是否存在故障隐患以及是何种故障。 相似文献
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A conductor temperature monitoring system using the current method was developed to estimate conductor temperatures at joints of extra-high-voltage (EHV) underground power transmission XLPE cables in real time. The validity of the software and hardware was confirmed by measurements on an extrusion molded joint (EMJ) of a 275 kV 1×2500 mm2 aluminum-sheathed XLPE cable. The mean circumferential jacket surface temperature over the EMJ, where the cross section was larger than that at the cable portion, was measured by a line thermosensor using thermocouples or a distributed temperature sensor using an optical fiber. The conductor temperature in the cable joint was estimated by numerically solving simultaneous differential equations with 31 unknowns. A system which allows measurement of the cable conductor current at insulation joints of installed lines was also developed 相似文献
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为解决电力设备刀闸,电力电缆、电力导线接头由于接触不良等原因,引起接触部分发热,导致设备损坏等情况的发生,通过对发热部位的研究,根据测温、无线通信、监测系统的理论,设计了一种智能无线温度监测系统,对连接部位的温度变化进行在线监测。实际运用情况表明,该测温系统能有效监测接头部位的发热情况,提醒设备监护人员及时采取措施,确保了电力系统安全稳定运行。 相似文献
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简要介绍了电缆接头局部放电测试系统的工作原理及主要抗干扰方法——极性鉴别。应用该检测系统对运行中的220 kV电缆接头进行了现场测试,结果证明综合呆用极性鉴别、小波分析等抗干扰方法,可以有效地测试到运行电缆接头的局部放电信号。 相似文献
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Tian Y. Lewin P.L. Wilkinson J.S. Schroeder G. Sutton S.J. Swingler S.G. 《Dielectrics and Electrical Insulation, IEEE Transactions on》2005,12(6):1222-1234
An optically-based remote sensing technique using a laser source, polarization scrambler, standard single mode fibers, fiber polarizer, electro-optic (EO) modulator and optical receiver, for continuous on-line monitoring of partial discharges (PD) in high voltage cable joints is proposed. Both the fiber polarizer and EO modulator, which are placed near cable joints, are passive without any power requirements. An EO modulator with no electrical bias, which operates close to the half-intensity point, was used and proved to have much better light transmission performance and higher measurement sensitivity than the bias modulator approach investigated earlier. Various multiplexing techniques including optical switches and a fused fiber coupler have been investigated in order to implement multi-channel monitoring so that one laser source can be used to provide light to several fibers. The revised PD optical remote sensing technique has been applied to practical PD measurements on both 132 kV cable joint at the University of Southampton in the UK and 400 kV cable joints at Sudkabel GmbH in Germany. Obtained results have verified the principle and demonstrated the effectiveness of the developed technique. 相似文献