基于RFID无线测温技术在变电站的应用

发布时间：2019-03-02 21:06

【摘要】：随着配网自动化和配电自动化的深入推广,社会对供电系统可靠性的要求不断提高,传统的基于人工检测和定期检修模式已经不能适应时代的发展需求,全天候的实时监控将会成为智能电网发展的需求。目前国内供电系统在电量的自动监测方面已经取得很大成果,但是在温度等非电量监测领域还处于起步阶段。根据多年变电站的运行经验分析,多数事故引发的原因都是由于输变电线路、母排、电缆等设备的接头或刀闸在长期的使用过程中因为接触电阻过大呀绝缘老化而发热引起局部温度过高,甚至烧毁,引发火灾和大面积停电,给工业企业以及居民生活带来重大的经济损失。实时监测系统应用情况证明,此系统对实时发现供电设备漏电缺陷、保证供电设备安全可靠运行有很好的效果。经过10多年的运行,证明对各种供电设备的实时监测技术进行了试验和研制,特别是对电容型设备△I.tg δ△C的在线监控；避雷器泄漏电监控技术的研制和试验,获得了很大成就；研制了便携式、集中型和分散型设备,并及时发现了一些被测试设备漏电受潮,并实时采取措施加以止,阻止了更大停电事故的发生,确保了供电系统的安全生产,取得了巨大的经济社会效益。一些监控项目如tg6的测试和避雷器泄漏电流测量等还提出了全天候监测的企业标准。供电设备的高温故障时常发生,为确保供电设备的安全运行和提高设备运行的安全性,需要对装置的高温部位进行温度实时监测,实现温度超过限制报警。据统计,目前国内的大部分地区均不同程度地出现了变电站电缆头、隔离开关、母线、开关柜等设备因为接触不良或绝缘老化而造成温度超限变化,进而引发火灾安全事故的情况。本文是在智能变电站和物联网技术以及业务需求的大背景下提出基于RFID无线测温技术对变电站内的变压器、开关柜、刀闸等关键设备的关键节点进行7*24不间断的实时在线测温监测系统。当设备的关键发热节点在温度异常后,能及时的进行告警,要求管理人员及时的介入对异常干预,最大限度的保障变电站内设备的运行安全,也为无人值守变电站提供了补充。由于变电站停机维护周期长,目前约为3年时间,系统描述的传感器安装的电力设备的高压侧和低压侧都有。在本系统中,对产品的良品率有较高的要求,必须在生产上进行严格控制,传感器安装后,需要保证其运行3年以上。
[Abstract]:With the in-depth promotion of distribution automation and distribution automation, the reliability requirements of the power supply system are constantly improved, and the traditional mode based on manual inspection and regular maintenance can not meet the development needs of the times. All-weather real-time monitoring will become the demand of smart grid development. At present, the domestic power supply system has made great achievements in the automatic monitoring of electricity, but it is still in its infancy in the non-electric monitoring field such as temperature. According to the analysis of many years' operation experience of substations, most of the accidents are caused by transmission and transformation lines and bus lines. During the long-term use of connectors or gates of equipment such as cables, due to excessive contact resistance and aging insulation, heating causes local temperatures to be too high, and even burns down, causing fires and large-area blackouts. It has brought great economic losses to industrial enterprises and residents' lives. The application of the real-time monitoring system proves that the system has a good effect on finding the leakage defect of the power supply equipment in real-time and ensuring the safe and reliable operation of the power supply equipment. After more than 10 years of operation, it has been proved that the real-time monitoring technology for various power supply equipment has been tested and developed, especially the on-line monitoring of I.tg 未 C for capacitive equipment. The research and test of lightning arrester leakage monitoring technology have made great achievements. Portable, centralized and decentralized equipment has been developed, and some of the tested equipment have been discovered in time for leakage and dampened, and real-time measures have been taken to stop the occurrence of more serious blackouts and to ensure the safe production of the power supply system. Great economic and social benefits have been achieved. Some monitoring projects, such as tg6 testing and lightning arrester leakage current measurement, have also proposed enterprise standards for all-weather monitoring. The high temperature fault of power supply equipment often occurs. In order to ensure the safe operation of power supply equipment and improve the safety of equipment operation, it is necessary to monitor the temperature of the high temperature part of the device in real time to realize the alarm of temperature exceeding the limit. According to statistics, at present, in most parts of the country, substation cable heads, disconnecting switches, bus bars, switchgear and other equipment have changed beyond the limit due to poor contact or aging insulation to varying degrees. Then cause the situation of fire safety accident. In this paper, under the background of intelligent substation and Internet of things technology and business requirements, this paper proposes the transformer and switchgear in substation based on RFID wireless temperature measurement technology. The real-time on-line monitoring system of temperature measurement is carried out at the key nodes of the key equipment such as the switch and so on. When the temperature of the key heating node of the equipment is abnormal, the alarm can be carried out in time, and the managers are required to intervene in time to ensure the safety of the equipment in the substation to the maximum extent. It also provides a supplement for the unattended substation. Due to the long period of substation shutdown and maintenance, there are both high-voltage side and low-voltage side of the sensor installed in the system at present, which is about 3 years. In this system, there is a high requirement for the yield of the product, which must be strictly controlled in production. After the installation of the sensor, it is necessary to ensure the operation of the sensor for more than 3 years.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TP317.1

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