变电站一次侧设备温度在线监测系统设计.docxVIP

辽宁工程技术大学 本科毕业设计（论文） 摘要在电力系统中，一次设备的温度变化是一个非常重要的指标，它关系到电力设备能否安全稳定运行。在变电站运行过程中，一次设备的接点由于设备制造、触点氧化、电弧冲击等原因，会导致接点的接触电阻增大，使温度上升。当温度上升到一定程度后，设备的机械强度和电气强度会出现下降，严重时会导致电气设备的短路，甚至造成设备的损毁，严重威胁电网的安全运行。对电气设备的温度进行实时监测，可以帮助值班人员尽早发现问题，消除隐患，确保电力系统的安全运行。遵循变电站网络与通信协议 IEC61850 标准，利用通信技术、温度传感器技术、温度告警算法、监控中心技术等温度在线监测技术，开发设计适用于智能变电站的一次设备热点温度在线监测系统，包括过程层温度在线监测终端、间隔层温度在线监测 IED 以及站控层监控中心。利用CAN总线、RS485以及以太网技术，将传感器测量到的温度数据发送到数据接收主机上，实现温度的测量。无线传感器体积小，可以方便的安装在一次设备表面，因此可以准确的反应设备运行时温度信息，并使测量数据具有很强的实时性。通过观察监控机的检测页面，变电站运行人员能够及时全面的了解变电站内一次设备的实时温度信息。关键词：温度在线监测；IEC61850；在线监测IED；传感器；以太网AbstractIn the power system, a temperature change devices is a very important indicator, whether it relates to the safe and stable operation of power equipment. During the substation operation, the primary contacts due to equipment manufacturing equipment, contact oxidation, arc impact and other reasons, will lead to the contact resistance of contacts increases, the temperature rises. When the temperature rises to a certain extent, mechanical strength and electrical strength equipment will decline, in severe cases can lead to a short circuit of electrical equipment and even cause damage to the equipment, a serious threat to the safe operation of the grid. Temperature electrical equipment for real-time monitoring, can help detect problems early on duty, eliminate risks, to ensure the safe operation of the power system.Follow IEC61850 substation network and communication protocol standard, the use of communications technology, a temperature sensor technology, temperature alarm algorithm, control centers and technology Temperature monitoring technology, designed to develop a device suitable for the hot line temperature monitoring system intelligent substation, including the process of surface temperature Online monitoring terminal, the spacer layer Temperature monitoring station level IED and monitoring center. Using CAN bus, RS485 and Ethernet technology, the sensor sends the measured temperature data to the data recei