【正文】 ore, an obviou emperature rising will occur for some power transformers before the malfunction are formed. Oncondition that the realtime monitoring to the correct areas can be realized, a preventive maintenance would alter the present maintenance and inspection mode, an d be able to reduce the Maintenance Cost. Therefore, it is very important to keep the power transformers in the best situation. There are several methods to measure the hotspot temperature. A simple method is that the temperature sensor can be used to convert temperature signal into the electric signal and then the sampling data can be collected by the instrument. In this paper, a realtime temperature monitoring system for oilimmersed power transformers is designed. The designed monitoring system can effectively monitor some key area39。s running station. But, it cannot satisfyinspection39。s reliability. At designed monitoring system can effectively monitor present, the o il gas value and the signal of local discharge some key area39。t meet the requirement of safe production. Due to different thermal effects led by the natural or factitious fault, its temperature of oilimmersed power transformers is easy to change abnormally. An online measuring and controlling system based on MCU is discussed in this paper. In order to satisfy the requirement of state monitoring and fault diagnosis of power transformer on realtime and reliability, a kind of intelligent online monitoring instrument is designed. Each of its part is explained in this paper, including temperature signal collecting and data processing system. The simulation result showed the designed system was good in its realtime, reliability and running cost. Therefore, the designed state monitoring system for temperature and fault diagnosis of power transformer can be widely used in engineering and is expected to bring a bright future. Key words 168。 Design of Temperature Monitoring System for Oilimmersed Power Ransformers Based on MCU Suxiang Qian Hongsheng Hu Department of Mechanical and Electrical, University of Zhejiang Province, China Email: Abstract:168。 畢 業(yè) 設(shè) 計(jì)（論 文） 外 文 參 考 資 料 及 譯 文 譯文題目： 基于單片機(jī)的 油浸式 變壓器溫度監(jiān)測(cè)系統(tǒng) 的設(shè)計(jì) 學(xué)生姓名： 學(xué) 號(hào)： 專 業(yè)： 通信工程 所在學(xué)院： 指導(dǎo)教師： 職 稱： 2020 年 12 月 28 日 說明： 要求學(xué)生結(jié)合畢業(yè)設(shè)計(jì)（論文）課題參閱一篇以上的外文資料，并翻譯至少一萬(wàn)印刷符（或譯出 3 千漢字）以上的譯文。譯文原則上要求打?。ㄈ缡謱懀宦捎?400 字方格稿紙書寫），連同學(xué)校提供的統(tǒng)一封面及英文原文裝訂，于畢業(yè)設(shè)計(jì)（論文）工作開始后 2 周內(nèi)完成，作為成績(jī)考核的一部分。 C With the expansion of electric capacity and largescale extension of power grid, electric equipment is playing a significant role in modern life. At present, the technology of condition monitoring and fault diagnosing of power transformer has been made some improvement, yet its realtime performance and reliability still can39。 C Oilimmersed Power Transformer, Temperature, Data processing, MCU I. INTRODUCTION situation. There are several methods to measure the hotspot temperature. A simple method is that the With the continuous development of economy, the temperature sensor can be used to convert temperature power industry in our country has entered into a new signal into the electric signal and then the sampling data stage of development. Power transformer has been one of can be collected by the instrument. In this paper, a the most important equipments in electric power system. realtime temperature monitoring system for And its safety running plays a great important role in oilimmersed power transformers is designed. The order to ensure the electric power system39。s temperature variation: such as the box are often selected as the monitoring objects in the body, the transformer winding, the iron core, and so on, monitoring system of power transformer. The and it plays a significant role in supervisory control to the characteristic gases dissolved in oil can be monitored in operation situation of transformers. real time, which can help monitoring power transformer39。s requirement of power transformer. Besides, the signal of local discharge can be used to judge some A. Overall plan of the developed system fault39。s temperature variation: such as the box body, the transformer winding, the iron core, and so on and it plays a significant role in supervisory control to the operation situation of transformers. II. HARDWARE DESIGN A. Overall plan of the developed system Its function of the designed hardware mainly includes two parts: data collecting and transferring Besides, the controlling circuit can be further expandedin order to control some protectors by using the relay switch. The designed principles are ex