繼電保護(hù)用開(kāi)源電源的設(shè)計(jì)

電氣工程論文編號(hào):DQ127   論文字?jǐn)?shù):14940,頁(yè)數(shù):30

目 錄

摘要…………………………………………………………………………………………………Ⅰ
Abstract………………………………………………………………………………………………II
1  緒論…………………………………………………………………………………………………1
 1.1  研究背景……………………………………………………………………………………1
 1.2  課程的意義…………………………………………………………………………………2
 1.3  本文的主要內(nèi)容和工作……………………………………………………………………3
2  開(kāi)關(guān)電源的工作原理……………………………………………………………………………4
 2.1  繼電保護(hù)用開(kāi)關(guān)電源的特殊要求…………………………………………………………4
 2.2  開(kāi)關(guān)電源的基本原理………………………………………………………………………4
 2.3  開(kāi)關(guān)變換器…………………………………………………………………………………7
 2.4  控制電路……………………………………………………………………………………10
3  開(kāi)關(guān)電源主電路的設(shè)計(jì)………………………………………………………………………12
 3.1  開(kāi)關(guān)電源電路設(shè)計(jì)分析……………………………………………………………………12
 3.2  主電路輸入級(jí)電路設(shè)計(jì)……………………………………………………………………13
 3.3  變壓器的設(shè)計(jì)………………………………………………………………………………15
4  開(kāi)關(guān)電源控制電路的設(shè)計(jì)……………………………………………………………………19
 4.1  PWM控制器…………………………………………………………………………………19
 4.2  輸出過(guò)欠壓保護(hù)……………………………………………………………………………22
 4.3  5V與24V時(shí)序配合…………………………………………………………………………22
5  總結(jié)………………………………………………………………………………………………25
致謝……………………………………………………………………………………………………26
參考文獻(xiàn)………………………………………………………………………………………………27

摘  要
 繼電保護(hù)裝置對(duì)電力系統(tǒng)的安全可靠運(yùn)行有著十分重要的作用， 而繼電保護(hù)用開(kāi)關(guān)電源是繼電保護(hù)裝置中的主要功能模塊， 電源性能的好壞直接影響到繼電保護(hù)裝置可靠性。由蓄電池組構(gòu)成的高頻開(kāi)關(guān)直流電源因其高可靠性成為電力操作電源系統(tǒng)中的重要組成部分。本文分析了國(guó)內(nèi)外高頻開(kāi)關(guān)電源的發(fā)展和現(xiàn)狀，研究了開(kāi)關(guān)電源的基本原理以及開(kāi)關(guān)電源在電力直流操作電源系中的應(yīng)用，設(shè)計(jì)出一種實(shí)用于繼電保護(hù)的開(kāi)關(guān)電源。本文設(shè)計(jì)的開(kāi)關(guān)整流模塊還具有多種保護(hù)措施，如過(guò)壓、過(guò)流等，該電源主電路采用反激式電路，應(yīng)用反饋手段和脈沖調(diào)制技術(shù)實(shí)現(xiàn)多路電壓的穩(wěn)定輸出。由于開(kāi)關(guān)電源用繼電保護(hù)的特殊要求，故系統(tǒng)具有體積小、重量輕、可靠性高等一系列優(yōu)點(diǎn)。
關(guān)鍵詞 開(kāi)關(guān)電源；繼電保護(hù)；反激式電路

Abstract
Protective relay play the important part in the safety of power system, and switching power supply for relay protection is the mail functional modules for protective relay, power performance to a direct impact on the reliability of relay protection devices. In the power plant and transformer substations, the DC operation power is supplied from high frequency switching power supply (HF SPS) and uses bulky batteries as alternative power. The paper analyze the present situation development of high frequency switching power supply domestically and overseas, study and research the basal principle of HF SPS and its application in electric power system, then design HF SPS applied in electric power system. System exceptions, such as over-voltage, over-current, etc, are dealt with by carefully designed protection circuits. The reverse excitation circuit is applied for the power circuit. We get static outputs by using the methods of feedback and pulse-width modulation. Because the switching power supply for relay protection system, the switching mode power supply has many advantages: light weight, small physical size, high reliability, etc.
Key word  switching power supply；relay protection； reverse excitation circuit