供电所辖区电力电缆温度监测系统设计

发布时间：2018-04-12 23:11

本文选题：热阻 + 介质损耗　；参考：《华北电力大学》2017年硕士论文

【摘要】：电力电缆的温度在线测量关系到电力企业对电力电缆线路的日常检修与维护,因此电力电缆温度在线测量对企业有着非常重要的影响。文本根据目前祝泽站农业524线路的情况,针对电缆温度传感器的安装位置、安装方法、信息采集结构等方面进行分析,并利用上位机计算出导体内芯的温度,并确定出一个合理的温度范围,保证电力电缆的正常使用,避免提前老化。接着根据计算出来的导体温度,结合电力负荷进行分析,并建立起温度预警系统,为供电企业提供检修建议。首先本文根据国内外研究现状,结合电路稳态时电缆的等值热电路以及导体的内阻、电损耗以及其发热方程等建立起测温模型,通过测量绝缘层外部温度并结合导体内部电流,对导体内温度进行测量,并基于电力系统稳态情况下进行重点分析。然后根据上述测温模型建立起一套现场测温装置,本文采用光纤传感器对电力电缆进行测温,并将传感器捆绑与电缆之上,并进行固定。同时根据被测线路的实际要求,设计传感器安放位置。接着,对系统的信号采集与数据处理模块进行设计,完成系统的硬件设计。接着本文对系统的软件进行设计,软件设计包括了对下位机数据发送模块设计,上位机界面和数据库设计,并详细介绍了每个模块的功能。最后利用系统的测试功能对传感器的测温功能进行测试,并根据已有模型得出温度与电流、时间的关系。
[Abstract]:The on-line temperature measurement of power cable is related to the daily maintenance and repair of power cable line in power enterprise, so the on-line temperature measurement of power cable has a very important influence on the enterprise.According to the current situation of agricultural 524 line in Zhuze Station, the paper analyzes the installation position, installation method and information collection structure of cable temperature sensor, and calculates the temperature of conductor inner core by upper computer.A reasonable temperature range is determined to ensure the normal use of power cables and avoid premature aging.Then according to the calculated conductor temperature, combined with the power load analysis, and set up a temperature warning system for power supply enterprises to provide repair advice.First of all, according to the current research situation at home and abroad, this paper establishes a temperature measurement model combining the equivalent heat circuit of the cable and the internal resistance, loss and heat equation of the conductor when the circuit is steady-state. By measuring the external temperature of the insulation layer and combining the internal current of the conductor, the temperature measurement model is established.The temperature in the conductor is measured and analyzed based on the steady state of the power system.Then a set of field temperature measuring device is established according to the above temperature measurement model. In this paper, the optical fiber sensor is used to measure the temperature of power cable, and the sensor is tied to the cable and fixed.At the same time, according to the actual requirements of the measured circuit, the sensor placement is designed.Then, the signal acquisition and data processing module of the system is designed to complete the hardware design of the system.Then the software of the system is designed. The software design includes the design of the data sending module of the lower computer, the interface of the upper computer and the database design, and the function of each module is introduced in detail.Finally, the temperature measurement function of the sensor is tested by the test function of the system, and the relationship between temperature, current and time is obtained according to the existing model.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP274;TM247

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