基于无线通信的高压设备温度监测系统的设计[J].doc

基于无线通信的高压设备温度监测系统的设计 江　和，张培铭，翁桂华 (福州大学电气工程与自动化学院　福州　350108) 摘　要：在对现有高压设备温度监测技术进行分析研究的基础上，研制了基于无线通信的高压设备温度监测系统。该系统的高压侧单片机通过高压侧无线发射接收模块与低压侧的无线发射接收模块进行无线双向通信，实现了高压设备的温度监测信号向低压侧传送。本文针对该系统的关键问题，重点介绍了以PCB板铜箔为介质的无线通信天线设计的基本方法与计算式，设计了无线发射模块的PCB板铜箔环形天线参数；介绍了高压侧以太阳能电池为主的专用电源的设计，该电源由处于低压侧的单片机系统控制的聚光灯为高压侧的太阳能电池提供能量，通过低功耗稳压模块输出稳定电压3.3 V；介绍了综合性能较好的温度传感器及其特性处理方式。实验室运行验证了该系统通信的可靠性。 关键词：高压设备；无线通信；太阳能电池；温度监测 中图分类号：TM83　　文献标识码：A　　国家标准学科分类代码：470.4017 Design of temperature monitoring system for high-voltageequipment based on wireless communication Jiang He, Zhang Peiming, Weng Guihua (School of Electric Engineering and Automation, Fuzhou University, Fuzhou 350108, China) Abstract：Based on the analysis of current temperature monitoring technologies for high-voltage equipment, this article develops a system on the basis of wireless communications. In this system, the MCU on the high potential side communicates interactively with the low potential side by means of the wireless transceiver modules on both sides, so that the temperature signal of the high-voltage equipment can be sent to the low potential side. This article focuses on the following key techniques: the design of the antenna made of PCB in wireless communications; the power source based on solar cells in the high-voltage equipment, for which energy is provided by the MCU-controlled spotlight on the low potential side, which steadily produces a 3.3 V voltage through the low power voltage control module; and the parameters and the processing method of a well-performed temperature sensor. The tests in laboratory indicate the reliabilityof this system in communication. Key words：high-voltage equipment; wireless communication; solar cell; temperature monitoring 1　引　　言 在电力系统运行中，过电流将导致电器、母线等过热；母排、触头、电缆等接头导电部分接触不良也将导致过热。设备过热又将导致绝缘损坏并产生绝缘老化甚至造成短路故障。电力系统中的大部分故障都与发热有关。因此，高压设备的温度监测关系到整个系统的可靠与安全运行。 由于高电压系统的高电压、强磁场等特殊问题，常规的测温方法是不适用的。毫无疑问，保证高电压设备的温度监测系统的安全、可靠与监测的准确度，该系统必须重点解决信号的提取，高压侧信号转换与发射电路的电源以及信号的可靠隔离与传输。因此，上述三个问题是高电压设备的温度监测系统设计的关键问题