【正文】 并且根據(jù)系統(tǒng)短路電流和變壓器容量的不同,可以選擇不同的保護方法,包括低電壓啟動的過電。動作于跳閘。 差動保護差動保護作為變壓器的主保護反應變壓器繞組和引出線的相間故障,它能夠跳開變壓器各側斷路器。對于一些帶有負荷調壓的變壓器的調壓裝置,一般都設置有載瓦斯,和上述一樣的道理,當發(fā)生輕瓦斯動作的時候,會發(fā)出一定的信號,當發(fā)生重瓦斯動作時,出現(xiàn)跳閘現(xiàn)象。2 變壓器保護配置及作用 瓦斯保護瓦斯保護作為變壓器的主要保護措施,它能夠反映變壓器油箱內的故障和油面降低。選擇繼電保護方案時,除設置需滿足以上4 項基本性能外,還應注意其經濟性。快速性,能以最短時限將故障或異常消除。繼電保護裝置必須具備4項基本性能:靈敏性,反映故障的能力,通常以靈敏系數(shù)表示。1 繼電保護概述在電力系統(tǒng)運行中,為了能夠從根本上保證供電的可靠性和系統(tǒng)的正常運行,就必須進行相應的繼電保護。繼電保護。隨著電力電子技術的不斷發(fā)展,微機已在電力變壓器的繼電保護中起到至關重要的作用,就此對電力變壓器微機繼電保護進行簡要的分析。s workstation problems, damaged, it will not affect the normal operation of the entire information system, and recovery is very simple, software developers, system upgrading library only limited ways, so that The whole process easy and convenient. practical Operation in the production of some of the practical problems, an effective solution to all types of data between the second part of the use and sharing. This system can analyze the system and the data statistics, which for the protection of the technical staff who have practical, can run a certain extent, improve the level of protection. Remote Monitoring Protection device with the PC serial munication function, and remote puter monitoring system substations to municate with contacts, so that the whole puter with remote monitoring of protection, which no one substation to provide a protective relay system. 4 Realization of power transformer protection Software applications The main query for all types of secondary information on the three remote realtime analysis of data processing, records of previous trial to pare fixed, accident, failure alarm events such as instructions and response time and the number of times the action statistics. The material of the secondary equipment testing, recording, management and valuation trial notice given by the protection officer by that date, to other department for advice and sharing. It can be achieved between the database and linked images and graphics are reflected in the existence of secondary equipment failures and defects, and records and the operation of protective devices for effective analysis. Set a parameter interface equipment, such as voltage, power and current records of test equipment can be effectively carried out with a wiring diagram of the main query, the system this as a secondary source of data, the assistant analysis can also be used for press release boards and to facilitate the exchange of information between departments and cooperation. Data Warehousing and method library Currently, the data warehouse is a traditional relational database than the original function more and more data organization, it is not only the application interface, nonstructural dynamic storage interfaces, and has a strong performance, but with vast amounts of data processing capabilities. In addition, the method library is able to package and store large amounts of processing the rule base is the concentrated expression of the application forms of software, it can save the integrity of the data, effectively limit the use of customers. The establishment of model system In recent years, with extensive use of puter technology, business can not develop without the use of information resources. Therefore, the transformer relay protection management system, but also should pay attention to this point, you can learn from the outside space available information and data, can also provide certain information to the external space of data, the use of intranet system model is established now the main mode. 5 Conclusion In summary, since the power system operation, the transformer protection is an essential part of it can prevent accidents and reduce the scope of incidents to improve system reliability, the maximum continuous power supply to ensure safety to the user. 譯文：淺談電力變壓器的繼電保護 摘要: 變壓器是電力系統(tǒng)中較為重要的電氣原件,它具有故障小,結構可靠的特點,但是在實際的運行過程中,還是會產生一定的故障和異常情況。 protection。cos= 需要補償?shù)臒o功功率為△Q=p(tantan)=*()= 選用的個數(shù)為n== 選用75個 =*40=補償后視在功率為S==cos=== 由主變壓器容量選擇的條件⑴裝有一臺主變壓器的變電所 主變壓器容量不應小于總的計算負荷，即≥⑵裝有兩臺主變壓器的變電所 每臺主變壓器的容量不應小于總的計算負荷的60%—70%，即≥（—），即≥==*=綜合考慮，選取兩臺變壓器并列運行，型號及參數(shù)如下表額定容量(kvA)電壓組合（kv）聯(lián)接組標號損耗（kw）空載電流（%）重量（kg）短路阻抗（%）外形尺寸（mm）長寬高規(guī)矩（mm）縱向橫向高壓分接范圍低壓負載空載器身重油重總重630035177。. Applied Regression Analysis，wiley， New York，2nd edu，1981[11] amp。老師，您辛苦了！最后，衷心感謝在百忙之中評閱論文和參加答辯的各位老師。大學四年來，老師們在學習上、生活上給與了我無微不至的關懷和照顧，是他們讓我逐步成長起來的，沒有他們的幫助就不會有現(xiàn)在今天知性的我，自信的我。我不僅學到了扎實、寬廣的專業(yè)知識，也學到了做人的道理。在設計過程中，無論是在構思步驟，分析系統(tǒng)網絡圖，配置保護，還是保護的整定計算和靈敏性校驗上，老師都給與了我極大的幫助，在我設計遇到困難無法進行時，給予幫助和引導。致謝本次接近兩個多月的畢業(yè)設計能夠順利完成離不開杜兆文老師的盡責輔導和同學們的熱心幫助。另外，雖然本次設計的短路計算和整定是手算的，但潮流計算和次暫態(tài)分析都是通過計算機計算分析的，所以在今后的工作學習中，仍需不斷努力，深入研究繼電保護裝置的內部結構和控制，使得理論和實際能夠更好的聯(lián)系起來，更加充實自己的理論和實踐知識。這段時間我翻閱了許多的書籍，從對變壓器的生疏，到了解，再到深入研究，使我第一次完成了一件實際應用的設計。在本次畢業(yè)設計的過程中，通過查閱相關書籍，使我對保護的原理有了更深的理解，擴充了我的知識；在畫二次回路圖時，通過請教同學和老師，使我更加熟練的運用AutoCAD軟件畫出了規(guī)范的二次回路圖。6總結繼電保護整定計算是電力系統(tǒng)生產運行中一項重要的工作。（10）104次。（6）功率消耗輸入激勵量為額定值時，電壓繞組的功率消耗不大于5W，電流繞組的功率消耗不大于4W。（4）保持值具有電流保持繞組的繼電器，保持電流不大于80%額定保持值。（2）動作值為額定值的30%70%。（五）DZS11CE型延時中間繼電器DZS10CE系列延時中間繼電器用于電力系統(tǒng)各種保護和自動控制線路中，以增加保護和控制線路的觸點數(shù)量和觸點容量。（8）機械壽命為104次。（6）觸點形式為三副動合觸點。（3）觸點的斷開容量DC 250V/2A/50WAC 250V/2A/200VA（4）觸點的長期允許閉合電流為2A。（1）動作值電壓型不大于70%額定電壓；電流型不大于90%額定電流。（15）重量約為1kg。（13）電壽命為5103次。（8）絕緣電阻不小于300 MΩ。10%（可換算成絕對值）；，直流繼電器不大于80%額定電壓，交流繼電器不大于95%額定電壓；。，對于前兩點刻度整定值，應不超過最大延時整定值的177。（5）延時一致性在基準條件下，繼電器延時主觸點延時一致性見下表。繼電器的可靠返回電壓不小于5%額定電壓。（2）觸點形式一副瞬時轉換觸點、一副滑動動合觸點和一副終止動合主觸點。（三）DS26E型時間繼電器DS20E系列時間繼電器作為輔助元件用于各種保護盒和動控制線路中，使被控制元件的動作可得到調節(jié)的延時。（12）機械壽命為104次。，繼電器動作過程中的可動系統(tǒng)不應當停滯在中間位置。（8）介質強度為2kV/50Hz/1min。附加電阻表面溫度不超過150℃。（5）環(huán)境溫度引起的變差不大于5%。（3）動作時間；2倍實測動作值時不大于0，04s。（1）DL21CE型電流繼電器有一個動合觸點，動作于過電流。（11）重量約為4kg。（7）功率消耗工作繞組和一個平衡繞組全部串聯(lián)接入，當在保護區(qū)內發(fā)生故障，且電流等于5A時，繼電器的單相功率消耗不超過16VA。當K=，；當K=，e值應不低于下表的規(guī)定短路繞組AABBC–CDDe（5）可靠系數(shù)；。當用于保護兩繞組電力變壓器或交流發(fā)電機時。4。 所選繼電器參數(shù)介紹（一）BCH2E型差動繼電器（1）額定值（輸入激勵量）交流頻率為50Hz；交流額定電流為5A