CT二次側(cè)數(shù)據(jù)采集與傳送裝置的設(shè)計(jì)

電子機(jī)電論文編號(hào):JD1035  論文字?jǐn)?shù):20353,頁(yè)數(shù):52

目 錄

 第1章 緒 論 1
 第2章 裝置的總體設(shè)計(jì)方案 2
2.1裝置設(shè)計(jì)方案 2
2.2裝置的主要工作原理 3
 第3章 裝置的硬件電路設(shè)計(jì) 4
3.1 單片機(jī)控制模塊介紹 4
 3.1.1 AT89S51單片機(jī)簡(jiǎn)介 4
 3.1.2 AT89S51單片機(jī)硬件結(jié)構(gòu)及引腳功能 5
 3.1.3 數(shù)據(jù)存儲(chǔ)器的外部擴(kuò)展電路 10
3.2 A/D電路設(shè)計(jì) 10
 3.2.1 TLC1543 A/D介紹 10
 3.2.2TLC1543與單片機(jī)接口電路 11
3.3D/A電路設(shè)計(jì) 12
 3.3.1TLC5615 D/A介紹 12
 3.3.2復(fù)位方式 15
3.4 無(wú)線數(shù)傳模塊 17
3.5電量隔離傳感器 20
 第4章 系統(tǒng)軟件設(shè)計(jì) 23
4.1 系統(tǒng)的軟件實(shí)現(xiàn) 23
4.2 系統(tǒng)流程圖及程序 23
 第5章 結(jié)論 31
 參考文獻(xiàn) 32
 致 謝 34
 附錄Ⅰ外文及翻譯 35
 附錄Ⅱ原理圖 46
 附 錄Ⅲ 元件清單48

摘 要
 在電力系統(tǒng)中,存在著CT與二次側(cè)數(shù)據(jù)處理系統(tǒng)距離較遠(yuǎn)的情況，工程上常用的簡(jiǎn)便方法是通過(guò)導(dǎo)線連接直接傳送CT二次側(cè)電流,形成閉合回路,此方法盡管簡(jiǎn)單,成本低易于實(shí)現(xiàn),但由于傳送距離遠(yuǎn).信號(hào)易被干擾,至使測(cè)量精度降低,并且若傳輸導(dǎo)線出現(xiàn)斷路,將造成CT二側(cè)開(kāi)路,使電流信號(hào)傳輸中斷,嚴(yán)重者使CT因二次側(cè)開(kāi)路而燒毀.為保證CT安全和數(shù)據(jù)可靠性,提出采用數(shù)字傳輸方法,設(shè)計(jì)出遠(yuǎn)程數(shù)據(jù)傳送裝置,該裝置由發(fā)送和接收兩部分組成.兩部分之間利用無(wú)線數(shù)傳。本裝置即使傳輸線路中斷也不會(huì)影響到CT,從而保證了CT 的正常運(yùn)行.
 給出了利用單片機(jī)無(wú)線數(shù)傳通訊對(duì)電力系統(tǒng)CT二次側(cè)電流進(jìn)行遠(yuǎn)距離數(shù)字傳送和接收的實(shí)用方案,使CT不會(huì)因?yàn)槎�次�?cè)開(kāi)路而燒毀,抗干擾能力強(qiáng),測(cè)量精度高,并能夠直接提供A/D轉(zhuǎn)換結(jié)果,并還原信號(hào),本裝置適合應(yīng)用于電力參數(shù)微機(jī)監(jiān)控系統(tǒng)中.
 
 關(guān)鍵字：?jiǎn)纹瑱C(jī)；無(wú)線數(shù)據(jù)通信；A/D；CT
 

Abstract
 In the electrical power system, the CT is to be away from the far situation with two sides data processing system. In the project the common used simple method is through the wire coupling direct transmission CT,and the two sides electrical currents forms in the closed path. This method is free simple. The cost is low easy to realize, but because the transmits is too far. The signal is easy disturbed to cause the measuring accuracy to reduce. If the transmission wire presents abruption will create the CT two sides openings to causes the electric current signaling interrupt.The serious are to cause CT to burn down because of the two sides openings. In order to guarantee the CT security and the data reliably,that is used the proposed digital transmission method, The designed long range data transport unit, This equipment to by transmits and receives two parts of the composed between 0.2 parts to use without the line number biography. Even if this installment is transmission that the line interrupt will not affect CT, thus has guaranteed the CT normal operation gave passed on the communication which to used the monolithic integrated circuit without the line number to carry on the long-distance range digit transmission ,For received practical plan to the electrical power system ,the two sides electric currents of the CT is to cause CT not to burn down.Because of the two sides openings, antijamming ability, the measuring accuracy is high, and could provide A/D transformation result directly, which returned to original state the signal, This installment suited applies in the electric power parameter microcomputer supervisory system.
 Key words: Monolithic integrated circuit; Wireless data communication; A/D; CT.