【正文】 路，由于PR/V分量的比重大，串聯(lián)補償?shù)恼{(diào)壓效果就很小。故串聯(lián)電容器調(diào)壓一般用在供電電壓為35KV或10KV，負荷波動大而頻繁，功率因數(shù)又很低的配電線路上。3）靜止補償器補償裝置：它由靜電電容器與電抗器并聯(lián)組成電容器可發(fā)出無功功率，電抗器可吸收無功功率，兩者結(jié)合起來，再配以適當?shù)恼{(diào)節(jié)裝置，就能夠平滑地改變輸出（或吸收）無功功率的靜止補償器，與同步調(diào)機相相比較，運行維護簡單，功率 損耗小，但相對串聯(lián)電容及并聯(lián)電容補償裝置，其造價高維護較復雜。4）并聯(lián)電容器補償裝置：并聯(lián)電容器是無功負荷的主要電源之一。它具有投資省，裝設地點不受自然條件限制，運行簡便可靠等優(yōu)點，故一般首先考慮裝設并聯(lián)電容器。由于它沒有旋轉(zhuǎn)部件，維護也較方便，為了在運行中調(diào)節(jié)電容器的功率，可將電容器連接成若干組，根據(jù)負荷的變化，分組投入或切除。由于本次設計的變電站為220KV降壓變電站，以補償?shù)慕嵌葋磉x擇，以上四種均能滿足要求，但是從維護和性能的角度來考慮，選用靜止補償裝置比較合適。 對于直接供電的末端邊點所，安裝的最大容性無功量應等于裝置所在母線上的負荷按提高功率因數(shù)所需補償?shù)淖畲笕菪詿o功量與主變壓器所需補償?shù)淖畲笕菪詿o功量之和。把總無功容量分為兩組，這樣才能更靈活地適應系統(tǒng)負荷以及電壓變化，更有效地改善系統(tǒng)電壓穩(wěn)定，以及負荷大小所需的無功容。 ＝（tg－tg）＝（）式中：——有功計算負荷（KW） tg——補償前用電單位自然功率因數(shù)角正切 tg——補償后用電單位功率因數(shù)角正切值1）110KV側(cè)的補償無功量 ＝（）＝200（）＝200（）＝58（MVAR）2）35 KV側(cè)的補償無功量 ＝（）＝70（）＝70（）＝（MVAR）＝（+）式中：—主變壓器需要補償?shù)淖畲笕菪詿o功量—需要進行補償?shù)淖儔浩饕粋?cè)的阻抗電壓百分值—母線裝設補償裝置后，通過變壓器需要補償一側(cè)的最大負荷電流值—主變壓器需要補償一側(cè)的額定電流值—變壓器空載電流百分比—變壓器需要補償一側(cè)的額定容量1）110KV一側(cè)補償 ＝（+）＝（+）240＝43 （MVAR）所以，110KV側(cè)補償需要的總?cè)菪詿o功量為：＝＋＝58＋243＝144 （MVAR）2）35KV一側(cè)補償 ＝（+）＝（+）240＝（MVAR）所以，110KV側(cè)補償需要的總?cè)菪詿o功量為：＝＋＝＋2＝ （MVAR）在降壓變電所中設置的無功功率補償裝置，是實現(xiàn)無功功率的就地平衡和保證電壓質(zhì)量的重要手段。無功補償裝置一般都接在降壓變壓器的低壓側(cè)。過去在一次變電所中多采用同期調(diào)相機作為無功功率補償裝置。在新設計的變電所中，由于具有經(jīng)濟、維護和安裝的優(yōu)點，多采用靜止補償裝置作為無功功率補償。本站也采用靜止補償裝置。本章小結(jié)無功補償是保證電壓質(zhì)量的重要因素，在地區(qū)性變電站中又顯得十分重要，它有利于改變該電區(qū)的電壓質(zhì)量。在本章中著重從本站的條件，對無功補償容量進行計算。并選擇了靜止補償裝置。結(jié)束語 本設計說明書以220KV變電站為例，簡要介紹了電力系統(tǒng)中變電站部分的一次主接線設計：1）對原始資料進行分析，設計出從技術和經(jīng)濟上都比較滿意的主接線形式。2）設計出站用電接線形式和備用電源方案。3）選擇高壓電器和母線，然后校驗它們的動、熱穩(wěn)定性。4）設計出本站的防雷和過電壓防護系統(tǒng)，其中主要是避雷針的布置。5）最后設計出本站的總平面圖和各電壓等級側(cè)的高壓配電裝置斷面圖，然后進行了簡要的運行分析。本設計只是理論上的設計，離實際工程設計還很遠，而且本設計只涉及到一次部分，沒有提到二次部分，所以設計還不完善，有一定的漏洞。本設計沒有經(jīng)過實踐，所以我只有在將來的工作中，多參加實踐，以補充學習上的不足。 設計對于我來說，還是個新詞。其中的困難是不言自明的。但在老師的支持及細心解答下，我最終突破了設計困難,達到了設計的要求。在此,我對幫助我的老師表示誠摯的謝意。此外，我還要對在這次設計中，幫助和支持我的同學，表示感謝！參考文獻[1] 熊信銀．發(fā)電廠電氣部分．中國電力出版社，2004年[2] 華智明．張瑞林．電力系統(tǒng)．重慶出版社，2004年[3] 宋繼成．220—500KV變電所電氣接線設計．中國電力出版社，2004年 [4] 文遠芳．高電壓技術．華中科技大學出版社，2005年[5] 孫瑩．王葵．中國電力出版社 [6] ：中國電力出版社，1999年[7] ：中國電力出版社，1995年[8] ：中國水利水電出版社，1997年.附錄附圖1 方案一電氣主接線圖附圖2 方案二電氣主接線圖附圖3 電氣總平面圖附圖4 220KV配電裝置斷面圖附圖5 110KV配電裝置斷面圖附圖6 35KV配電裝置斷面圖g an employment tribunal claimEmployment tribunals sort out disagreements between employers and employees.You may need to make a claim to an employment tribunal if: you don39。t agree with the disciplinary action your employer has taken against you your employer dismisses you and you think that you have been dismissed unfairly.For more information about dismissal and unfair dismissal, seeDismissal.You can make a claim to an employment tribunal, even if you haven39。tappealedagainst the disciplinary action your employer has taken against you. However, if you win your case, the tribunal may reduce any pensation awarded to you as a result of your failure to appeal.Remember that in most cases you must make an application to an employment tribunal within three months of the date when the event you are plaining about happened. If your application is received after this time limit, the tribunal will not usually accept it.If you are worried about how the time limits apply to you, take advice from one of the organisations listed underFurther help.Employment tribunals are less formal than some other courts, but it is still a legal process and you will need to give evidence under an oath or affirmation.Most people find making a claim to an employment tribunal challenging. If you are thinking about making a claim to an employment tribunal, you should get help straight away from one of the organisations listed underFurther help.If you are being represented by a solicitor at the tribunal, they may ask you to sign an agreement where you pay their fee out of your pensation if you win the case. This is known as adamagesbased agreement. In England and Wales, your solicitor can39。t charge you more than 35% of your pensation if you win the case.If you are thinking about signing up for a damagesbased agreement, you should make sure you39。re clear about the terms of the agreement. It might be best to get advice from an experienced adviser, for example, at a Citizens Advice Bureau. To find your nearest CAB, including those that give advice by , click onnearest CAB.For more information about making a claim to an employment tribunal, seeEmployment tribunals.The (lack of) air up there Watch mCayman Islandsbased Webb, the head of Fifa39。s antiracism taskforce, is in London for the Football Association39。s 150th anniversary celebrations and will attend City39。s Premier League match at Chelsea on Sunday.I am going to be at the match tomorrow and I have asked to meet Yaya Toure, he told BBC Sport.For me it39。s about how he felt and I would like to speak to him first to find out what his experience was.Uefa hasopened disciplinary proceedings against CSKAfor the racist behaviour of their fans duringCity39。s 21 win.Michel Platini, president of European football39。s governing body, has also ordered an immediate investigation into the referee39。s actions.CSKA said they were surprised and disappointed by Toure39。s plaint. In a statement the Russian side added: We found no racist insults from fans of CSKA.Age has reached the end of the beginning of a word. May be guilty in his seems to passing a lot of different life became the appearance of the same day。 May be back in the past, to oneself the paranoid weird belief disillusionment, these days, my mind has been very messy, in my mind constantly. Always feel oneself should go to do something, or write something. Twenty years of life trajectory deeply shallow, suddenly feel something, do it.　　一字開頭的年齡已經(jīng)到了尾聲?；蛟S是愧疚于自己似乎把轉(zhuǎn)瞬即逝的很多個不同的日子過成了同一天的樣子；或許是追溯過去，對自己那些近乎偏執(zhí)的怪異信念的醒悟，這些天以來，思緒一直很凌亂