【正文】 次組合熱穩(wěn)定電流（KA）動穩(wěn)定電流（KA）104090動穩(wěn)定效驗：滿足動穩(wěn)定要求熱穩(wěn)定效驗：滿足熱穩(wěn)定要求總是所述，所選戶外獨立式電流互感器滿足要求。（2） 10KV母聯(lián)電流互感器的選擇由于10KV母聯(lián)與變高10KV側的運行條件相應，故同樣選用型電流互感器。 高壓熔斷器的選擇 35KV側熔斷器的選擇由于35KV采用屋外布置，初選RXW1035型熔斷器參數(shù)如下表210所示：表210 RXW1035型熔斷器技術參數(shù)型號額定電壓（KV）額定電流（A）額定開斷容量（MVA）RXW1035351000電流效驗：額定開斷電流大于或等于沖擊電流有效值。斷流量滿足要求，所選熔斷器合適。 10KV側熔斷器的選擇由于10KV采用屋內布置，初選RN210型熔斷器參數(shù)如下表211所示：表211 RN210型熔斷器的技術參數(shù)型號額定電壓（KV）額定電流（A）額定開斷容量（MVA）RN210101000電流效驗：額定開斷電流大于或等于沖擊電流有效值。斷流量滿足要求，所選熔斷器合適。 避雷器的選擇 35KV側避雷器的選擇避雷器滅弧電壓有效值：，故可選用FZ35型避雷器，其滅弧電壓為41KV，滿足要求。其參數(shù)如表212所示：表212 FZ35型避雷器的技術參數(shù)型號額定電壓（KV）滅弧電壓（KV）工頻放電電壓（KV）沖擊放電電壓幅值（KV）FZ35354184～104134 10KV側避雷器的選擇避雷器滅弧電壓有效值：，故可選用FZ10型避雷器，滿足要求。其參數(shù)如表213所示：表213 FZ10型避雷器的技術參數(shù)型號額定電壓（KV）滅弧電壓（KV）工頻放電電壓（KV）沖擊放電電壓幅值（KV）FZ101026～3145 110KV側避雷器的選擇避雷器滅弧電壓有效值：，故可選用FZ110型避雷器，其滅弧電壓為126，滿足要求。其參數(shù)如表214所示：表214 FZ110型避雷器的技術參數(shù)型號額定電壓（KV）滅弧電壓（KV）工頻放電電壓（KV）沖擊放電電壓幅值（KV）FZ110110126254～312375 電容電流計算35kV及以下的系統(tǒng)，其中性點的接地方式分為不接地和經消弧線圈接地。是否需要消弧線圈則需要對中性點的電容電流進行計算后確定。電容電流計算：35KV電容電流為：故需要消弧線圈。10KV電容電流為：故不需要消弧線圈。 消弧線圈的選擇 由于35KV系統(tǒng)其中性點經消弧線圈接地，故需選擇消弧線圈。所選消弧線圈的容量為： 要求消弧線圈的容量不小于630KVA，故可選用XDJL1100/35型消弧線圈，其容量為1100KVA，滿足要求。其參數(shù)如表215所示：表215 XDJL1100/35型消弧線圈的技術參數(shù)型號額定電壓（KV）額定容量（KVA）消弧線圈電壓（KV）XDJL1100/35351100結束語由于我對電力這方面很感興趣，因此選擇了電力方向的畢業(yè)設計題目。上學期放寒假的時候學習了兩門專業(yè)課《發(fā)電廠電氣部分》和《電力系統(tǒng)暫態(tài)分析》，雖說有點難學，尤其是暫態(tài)部分，但經過自身的努力，總算是大概學懂了。為這學期的畢業(yè)設計打下了理論基礎。經過兩個多月的努力，我終于完成了這個題目。在此過程中，我從對變電站的生疏，到了解，再到深入研究，第一次完成了一件實際應用的設計，感覺有不少的收獲：，并在以前的基礎上理解的更加透徹，掌握的更加熟練；，將課本上學到的理論知識和實際生產聯(lián)系了起來；。雖然，在這個過程中我也曾遇到了不少困難，但是，在老師和同學們的熱情幫助和我自己的不懈努力下，所有的難題都被我逐個解決，我也從中獲得了勝利的喜悅。這也讓我明白了一個道理:前途是光明的，道路是曲折的，只有靠自己頑強拼搏的精神和堅持不懈的努力才能夠到達成功的彼岸。正所謂：天下無難事，只要肯攀登。只要有契而不舍的精神，就沒有辦不到的事！總之，我覺得我的畢業(yè)設計做的還是比較成功的，因為我有不小的收獲。就快要畢業(yè)了，也為我的大學畫上一個完美的句號。在此，我還要感謝在我做畢業(yè)設計的過程中，給與我?guī)椭睦蠋熀屯瑢W。參考文獻[1][M].：中國電力出版社，1995[2]馮金光、[M].：中國水利水電出版社，2002[3]許珉、楊宛輝、[M].北京：機械工業(yè)出版社，2006[4][M].：水利電力出版社，1989[5](上、下冊)[M].北京:中國水利水電出版社，1999 [6][M].:中國電力出版社，1995[7][M].：中國電力出版社，1995 致謝經過兩個多月的時間，我順利的完成了這次畢業(yè)設計。從總體上來說，我對自己的成果還是比較滿意的，也基本上達到了老師的要求。這段時間我翻閱了許多的書籍，從對變電站的生疏，到了解，再到深入研究，第一次完成了一件實際應用的設計。不過由于本人經歷、閱歷、實際操作能力有限。難免存在一些不近人意的地方，請各位老師指點。 通過本次設計，不僅豐富了我的專業(yè)知識，還讓我深深體會到了認識事物的過程。從拿到題目，再查閱資料，對題目進行設計、論證、修改到設計的完成。體現(xiàn)了理論聯(lián)系實際的重要性。更重要的是這次設計讓我學會了讓自己獨立完成一件事情，為將來參加工作做好基礎。本設計的順利完成，自己付出了許多勞動，但與老師的細心指教是分不開的。在過程中體現(xiàn)出老師的淵博專業(yè)知識，更體現(xiàn)出了老師的寬厚待人的品質。我在設計過程中不但學會了勤奮求實的工作精神，更懂得了待人的品質。這一切將在我以后的工作生涯中起著重要的作用。借此機會，向幫助過我的老師，表示衷心的謝意！在此過程中，我還要特別感謝給予我?guī)椭耐瑢W、朋友們，是在他們的鼓勵、支持下我才會有今天的成績。附錄Ⅰ：專業(yè)相關文獻翻譯Faults on power systemEach year new designs of equipment bring about increased reliability of operation. Nevertheless, equipment failures and interference by outside sources occasionally result in faults on electric power system. On the occurrence of power from the generating stations to the loads may be unsatisfactory over a considerable area, and if the faulted equipment is not promptly disconnected from the remainder of the system, damage may result to other pieces of operating equipment.A fault is the unintentional or intentional connecting together of two or more conductors which ordinarily operate with a difference of potential between them. The connection between the conductions may be by physical metallic contact or it may be through an arc. At the fault, the voltage between the two parts is reduced to zero in the case of metaltometal contacts, or to a very low value in case the connection is through an arc. Currents of abnormally high magnitude flow the network to the point of fault. These shortcircuit currents will usually be much greater than the designed thermal ability of the conductors in the lines or machines feeding the fault. The resultant rise in temperature may cause damage by the annealing of conductors and by the charring of insulation. In the period during which the fault is permitted to exist, the voltage on the system in the near vicinity of the fault will be so low that utilization equipment will be inoperative. It is apparent that the power system designer must anticipate points at which fault may occur, be able to calculate conditions that exist during a fault, and provide equipment properly adjusted to open the switches necessary to disconnect faulted equipment from the remainder of the system. Ordinarily it is desirable that no other switches on the system are opened, as such behavior would result in unnecessary modification of the system circuits.A distinction must be made between a fault and an overload. An overload implies only that loads greater than the designed value have been imposed on system. Under such a circumstance the voltage at the overload point may be low, but not zero. This undervoltage condition may extend for some distance beyond the overload point into the remainder of the system. The currents in the overloaded equipment are high and may exceed the thermal design limits. Nevertheless, such currents are substantially lower than in the case of a fault. Service frequently may be maintained, but at belowstandard voltage.Overloads are rather mon occurrence in homes. For example, a housewife might plug five waffle irons into the kitchen circuit during a neighborhood party. Such an overload, if permitted to continue, would cause heating of the wires from the power center and might eventually start a fire. To prevent such trouble, residential circuits are protected by fuse or circuit breakers which open quickly when currents above specified values persist. Distribution transformers are sometimes overloaded as customers install more and more appliances. The continuous monitoring of distribution circuits is necessary to be certain that transformer sizes are increased as load grows. Faults of many types and causes may appear on electric power syste