【作者】 曾海燕；

【导师】 谈顺涛； 李卫国；

【作者基本信息】 武汉大学 ， 电力系统及其自动化， 2004， 硕士

【摘要】 变压器是电力工业中最常用的设备之一，它的工作状况将直接影响到电力部门的安全稳定运行，为了及时有效的掌握电力变压器的工作状况，对变压器进行在线监测是十分必要的。 本文分析了目前所用的设备的特点和不足，介绍了DSP技术的特点及局域网传输数据的特点，提出了基于DSP技术和局域网的变压器局部放电在线监测的新方案。通过双口RAM组成的数据链路存储器，ADC和DSP分别轮流往双口RAM中存储数据和取出数据，DSP把取出的数据进行预处理，如果发现可疑数据，通过局域网把这些可疑数据送往后台工控机，由后台工控机做进一步的处理。由单片机控制网卡控制芯片RTL8019AS从而和局域网相连，单片机和DSP通过主机接口(HPI)直接接口。该设计基本上保证了数据采集与处理的实时性。 本文对基于DSP的数据预处理和基于局域网的数据传输进行了硬件设计，同时对基于局域网的数据传输进行了部分软件设计。更多还原

【Abstract】 Transformer is one of the most in common use equipments in electric power industry. The condition of its operating will directly effect the safe stabilization run-time of the electric power section. For the sake of on time useful control what power transformer of operate condition, it is very necessary that transformer progress is on-line to monitor.The characteristics and shortcomings of the existing testing instruments are analyzed, and a new instrument based on DSP technology and LAN is designed. Though the data carrier stores chained by dual-port static ram, ADC store data to dual-port ram and DSP take off the data from dual-port ram separately, and DSP pretreatment the data, if distrustful data is found, then ship off the data to background computer throughout LAN, who treat this distrustful data ulteriorly. We use network interface card RSL8019AS of NE2000 controlled by SCM, the interface of SCM and DSP is HPI. This design ensures the real-time of the data acquisition and processing, by and large. This test gives the hardware design of data preprocessing based on DSP and data transmission based on LAN, at the same time some software’ s program of data transmission based on LAN is given.更多还原