【正文】 Originally, this world, can produce a chemical reaction to an event, in ad。t want to give vent to out your inner voice can be in the high school children of the feelings in a period, but was eventually infarction when graduation party in the throat, later again stood on the pitch he has sweat profusely, looked at his thrown a basketball hoops, suddenly found himself has already can39。t really grow up, it seems is not so important。The end of our life, and can meet many things really do?　　而窮盡我們的一生，又能遇到多少事情是真正地非做不可？During my childhood, think lucky money and new clothes are necessary for New Year, but as the advance of the age, will be more and more found that those things are optional。總覺得自己自己似乎應(yīng)該去做點(diǎn)什么，或者寫點(diǎn)什么。 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。s actions.CSKA said they were surprised and disappointed by Toure39。s 21 win.Michel Platini, president of European football39。for the racist behaviour of their fans durings about how he felt and I would like to speak to him first to find out what his experience was.Uefa hass 150th anniversary celebrations and will attend City39。Employment tribunals.The (lack of) air up there Watch mCayman Islandsbased Webb, the head of Fifa39。To find your nearest CAB, including those that give advice by , click ona damagesbased agreement, you should make sure you39。t charge you more than 35% of your pensation Further 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 aagainst 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 undert your employer dismisses you and you think that you have been dismissed unfairly.For more information about dismissal and unfair dismissal, see you don39。并利用公式算的短路電流有名值填入表42。并利用上述公式算的短路電流有名值填入表41。我們不僅在這次課程設(shè)計(jì)中發(fā)現(xiàn)了我們學(xué)習(xí)的薄弱之處，而且我們學(xué)會(huì)了如何將理論與實(shí)際相結(jié)合。整個(gè)課程設(shè)計(jì)能順利的做下來和老師的辛勤教學(xué)與指導(dǎo)是分不開的，通過這兩個(gè)學(xué)期的學(xué)習(xí)，我對(duì)發(fā)電廠電氣部分有了比較深入的了解，有了一些新的學(xué)習(xí)方法和思維方式，而這些對(duì)以后無論是工作學(xué)習(xí)都是很有用的。 表510 主要電氣設(shè)備選擇的結(jié)果表斷路器隔離開關(guān)電流互感器電壓互感器避雷器220KV出線回路LW2220 GW4220LCWB220(W)JCC5220FZ220J母線側(cè)LW2220GW4220LCWB220(W)JCC5220FZ220J雙繞組變壓器LW2220GW4220LCWB220(W)JCC5220FZ44三繞組變壓器LW2220GW4220LCWB220(W)JCC5220FZ44110KV出線回路SW6110GW4110G/1250LCWB110(W)JCC110FZ110母線側(cè)SW2110GW4110/2500LCWB110JCC110FZ110三繞組變壓器SW2110GW4110/2000LCWB110JCC110FZ44結(jié)束語(yǔ) 本次課程設(shè)計(jì)的題目是“2300MW+2200MW火電廠電氣部分設(shè)計(jì)”。所選避雷器的參數(shù)如表59所示。本工程采用220KV、110KV配電裝置構(gòu)架上設(shè)避雷針。（1）配電裝置的每組母線上，應(yīng)裝設(shè)避雷器，但進(jìn)出線都裝設(shè)避雷器時(shí)除外；（2）旁路母線上是否需要裝設(shè)避雷器，應(yīng)視在旁路母線投入運(yùn)行時(shí)，避雷器到保護(hù)設(shè)備的電氣距離是否滿足要求而定；（3）220KV以下變壓器到避雷器的電氣距離超過允許值，應(yīng)在變壓器附設(shè)一組避雷器；（4）三繞組變壓器低壓側(cè)的一相上宜設(shè)置一臺(tái)避雷器；（5）自耦變壓器必須在其兩個(gè)自耦合的繞組出線上裝設(shè)避雷器，并應(yīng)接壓器與斷路器之間；（6）下列情況的變壓器中性點(diǎn)應(yīng)裝設(shè)避雷器：1直接接地系統(tǒng)中，變壓器中性點(diǎn)為分級(jí)絕緣且裝有隔離開關(guān)時(shí)；2直接接地系統(tǒng)中，變壓器中性點(diǎn)為全絕緣，但變電所為單進(jìn)線且為單臺(tái)變壓器運(yùn)行時(shí)；3不接地和經(jīng)消弧線圈接地系統(tǒng)中，多雷區(qū)的單進(jìn)線變壓器中性點(diǎn)上。五、 避雷器的選擇避雷器是用來防止雷電產(chǎn)生的過電壓波沿線路侵入變電所或其它建筑物內(nèi)，以免危及被保護(hù)設(shè)備的絕緣。 （2）母線回路 最大工作持續(xù)電流：IN6 =180/（UN ）=180/（*110*）= IMAX6= IN6=.167KA UNs =110KV=121KV UN UNs 擬選型號(hào)為L(zhǎng)CWB—110系列電流互感器，具體參數(shù)如表56所示 表56 LCWB—110系列電流互感器技術(shù)數(shù)據(jù)額定電壓（KV）準(zhǔn)確級(jí)額定電流比（A）4s 熱穩(wěn)定電流（KA）額定動(dòng)穩(wěn)定電流峰值（KA）1102522*1200/5421101)動(dòng)穩(wěn)定校驗(yàn)： IMAX IIM 動(dòng)穩(wěn)定電流IMAX=110KA，110KV側(cè)短路沖擊電流為IIM = 即： IMAX IIM 滿足動(dòng)穩(wěn)定條件 2) 熱穩(wěn)定校驗(yàn)： ， =+= 查周期分量等值時(shí)間曲線可得 teq =即： 4*42*42=**= 滿足熱穩(wěn)定條件。 （4）三繞組變壓器回路最大工作持續(xù)電流：IN4 =240/（UN ）=240/（*110）=（A）IMAX4= IN4=UNs =220KV=242KV UN UNs 擬選型號(hào)為L(zhǎng)CWB—220（W）系列電流互感器根據(jù)額定電流和電壓所選型號(hào)和動(dòng)、熱穩(wěn)定校驗(yàn)與出線回路基本相同，這里就不再作詳細(xì)的敘述。（2） 母線回路IN2 =1000/（UN ）=1000/（*220*）= IMAX1 = IN2= UNs =220KV=242KV UN UNs擬選型號(hào)為L(zhǎng)CWB—220（W）系列電流互感器根據(jù)額定電流和電壓所選型號(hào)和動(dòng)、熱穩(wěn)定校驗(yàn)與出線回路基本相同，這里就不再作詳細(xì)的敘述。 1. 220KV側(cè)（1）出線回路最大工作持續(xù)電流：IN1 =1000/（10UN ）=1000/（*220*10*）= IMAX1 = IN1= UNs =220KV=242KV UN UNs擬選型號(hào)為L(zhǎng)CWB—220（W）系列電流互感器，具體參數(shù)如表表56所示。低壓后備電路一般也出三組，管普通過流保護(hù)，差動(dòng)保護(hù)，測(cè)量。差動(dòng)是專門保護(hù)變壓器的。若只有兩組，那么測(cè)量和計(jì)量可以串聯(lián)。kn還可以近似地表示為互感器一、二次線圈的匝數(shù)比，即kn≈kN=N1/N2式中NN2為一、二線圈的匝數(shù)。電流互感器的特點(diǎn)是： (1)一次線圈串聯(lián)在電路中，并且匝數(shù)很少，因此，一次線圈中的電流完全取決于被測(cè)電路的負(fù)荷電流．而與二次電流無關(guān)；(2)電流互感器二次線圈所接儀表和繼電器的電流線圈阻抗都很小，所以正常情況下，電流互感器在近于短路狀態(tài)下運(yùn)行。因此，電流互感器在電力系統(tǒng)中得到了廣泛的應(yīng)用。 表58 JCC—110系列電壓互感器技術(shù)數(shù)據(jù)額定工作電壓（KV）二次負(fù)荷連接組標(biāo)號(hào)初級(jí)繞組次級(jí)繞組剩余電壓繞組3級(jí)500VA1000VA。 表57 JCC5220系列電壓互感器技術(shù)數(shù)據(jù)額定工作電壓（KV）二次負(fù)荷連接組標(biāo)號(hào)初級(jí)繞組次級(jí)繞組剩余電壓繞組1級(jí)3級(jí)220/500VA500VA 型號(hào)含義： J——電壓互感器 C——串級(jí)絕緣 C ——瓷箱式 220/——額定電壓 油浸式電壓互感器為串級(jí)式全密封結(jié)構(gòu)，由金屬膨脹器、套管、器身、基座及其他部件組成。 （4）接在110KV及以上線路側(cè)的電壓互感器，當(dāng)線路上裝有載波通訊時(shí)，應(yīng)盡量與耦合電容器結(jié)合，統(tǒng)一選用電容式電壓互感器。各種互感器的使用范圍 （1）6—220KV配電裝置一般采用油浸絕緣結(jié)構(gòu)；在高壓開關(guān)柜或在布置地位狹窄的地方，可采用樹脂膠柱絕緣結(jié)構(gòu)。一組（△/Y）用于自動(dòng)重合閘。 （2）線路 當(dāng)需要堅(jiān)實(shí)和檢測(cè)線路斷路器外側(cè)有無電壓，共同期和自動(dòng)重合閘使用，該側(cè)裝一臺(tái)單相電壓互感器。三、電壓互感器的選擇 電壓互感器的配置原則是應(yīng)滿足測(cè)量、保護(hù)、同期和自動(dòng)裝置的要求；保證在運(yùn)行方式改變時(shí)，保護(hù)裝置不失壓、同期點(diǎn)兩側(cè)都能方便的取壓。（3）三繞組變壓器回路最大工作持續(xù)電流：IN7=200/（UN ）=240/（*110*）=IMAX7= IN7 =UNs =110KV=121KV UN UNs