【正文】 try to make the power supply system is simple, easy to operate, infrastructure investment and operation and maintenance costs low. With the power is widely used in mine production, mine security of supply must also pay attention to, due to the characteristics of electricity, you need the emphasis on safety.Common problems are the following aspects: load calculations, safety lines, protection, production safety, lightning issues.Electric load is the sum of all the electrical equipment of the power system power consumption. Here talked about coal power load refers to the electrical equipment or power user Mine. Coal power load based on the importance of electrical equipment and uninterrupted power supply for personal safety, as well as other aspects of economic applicability to electric load is the sum of all the electrical equipment in the power system power consumption. Here talked about coal power load refers to the electrical equipment or power user Mine. Coal power load based on the importance of electrical equipment and uninterrupted power supply different to personal safety, and economic applicability and other requirements, the power load is divided into three managed to obtain reasonable supply in different situations. Seek different, the power load is divided into three managed to obtain reasonable supply in different situations. Where suddenly interrupt the power supply may result in personal injury or death, damage to vital equipment and difficult to repair, resulting in longterm can not resume production, and other aspects of the economy are causing heavy losses, were a power load level, there are main mine fan, mining main drainage pump, central variable downhole each level (with) the electricity, Shaft lifting personnel lifting equipment, gas drainage equipment, etc., are all level of users. Such electricity customers are concerned with the protection of mine safety, it is also called the security burden. For a user must set up two independent power supply, absolutely reliable power supply requirements, all the way to the power supply fails, the other way to ensure the power supply immediately put into operation. Where suddenly interrupted power supply and other aspects of the economy would cause greater damage or affect the important equipment is working properly, and both primary and secondary load. There are two major coal mine inclined shaft power load lifting personnel lifting equipment, lifting shaft coal and material lifting equipment, ground centralized pressor stations, lamp charging equipment, wellbore insulation equipment, electric motor car as the main mode of transport and rectification charging equipment, mining area substation and mechanized mining face of electrical equipment, as well as up and down the main mine p。5. The power supply of the economyMine supply system on the basis of the above meet the basic requirements to minimize capital investment at all levels of the mine substation and power grid。This requires not only the power system or power plant capable of supplying sufficient power coal mines, mine facilities and requires the power supply system, but also has enough power supply capacity.4. guarantee adequate supply capacity . frequency offset margin requirements than 3000kW system does not exceed the rating of 177。 otherwise, the normal operation of electrical equipment will significantly deteriorate, or even damage the electrical equipment. The socalled voltage, frequency deviation is due to various reasons, to the terminal voltage and rated frequency difference on electrical equipment and that it is an important indicator of quality. The quality of the power supply requirements are: supply voltage deviation increases do not exceed the rating of 177。其次，我還要感謝大學(xué)四年里所有的老師們，感謝他們在大學(xué)四年中誨人不倦的教導(dǎo)，他們在課堂上說傳授的知識將使我受益終身，他們那認(rèn)真負(fù)責(zé)的態(tài)度，和優(yōu)秀的職業(yè)道德是我學(xué)習(xí)的楷模，在以后的工作中我將以他們我標(biāo)桿端正自己的工作態(tài)度和職業(yè)道德。在這個過程中曹金燕老師給了我很大的的幫助，沒有她的盡心指導(dǎo)和嚴(yán)格的要求，我也不會順利完成這次設(shè)計(jì)。致謝語首先，我要特別感謝我的指導(dǎo)老師曹金燕老師。（5）為了在供配電系統(tǒng)發(fā)生短路故障時，能夠自動、迅速、有選擇地將故障設(shè)備從系統(tǒng)中可靠切除，以免事故的進(jìn)一步擴(kuò)大，在論文中對變電所繼電保護(hù)進(jìn)行了整定設(shè)計(jì)。（3）用標(biāo)幺值法對供電系統(tǒng)進(jìn)行了短路電流計(jì)算，為電氣設(shè)備的選擇及校驗(yàn)提供了數(shù)據(jù)。同時也為短路計(jì)算提供了一定的依據(jù)。設(shè)計(jì)總結(jié) 本論文根據(jù)變電所的設(shè)計(jì)要求，對某F礦井地面35KV變電所展開設(shè)計(jì)，主要完成以下幾個方面的設(shè)計(jì)工作：（1）針對礦井負(fù)荷的用電需求情況，用需要系數(shù)法進(jìn)行了負(fù)荷計(jì)算。 對于單側(cè)電源的變壓器，過流保護(hù)安裝在電源側(cè)，過流保護(hù)動作時切斷變壓器各側(cè)開關(guān)。所以負(fù)荷保護(hù)可采用單電流繼電器接線方式，經(jīng)過一定延時作用于信號，在無人值班的變電所內(nèi)，也可作用于跳閘或自動切除一部分負(fù)荷。（2） 變壓器的差動保護(hù)差動保護(hù)用于變壓器內(nèi)部繞組、絕緣套管及出線相間短路的主保護(hù)。氣體保護(hù)是利用安裝于油箱和油枕間管道中的機(jī)械式氣體繼電器來實(shí)現(xiàn)的。 變壓器的保護(hù)設(shè)置 變壓器是電力系統(tǒng)的主要設(shè)備之一，他的正常運(yùn)行對供電系統(tǒng)的可靠性意義重大，電力變壓器的常用保護(hù)裝置有氣體保護(hù)、差動保護(hù)、過電流保護(hù)和過負(fù)荷保護(hù)等。此時若 QF8 不設(shè)保護(hù)，則當(dāng)10KV的母線右端發(fā)生短路時，將使QF4跳閘而使全企業(yè)停電，如設(shè)有保護(hù)，則此時QF8跳閘，切除右端母線，左端母線仍可繼續(xù)供電，因此提高了供電系統(tǒng)的可靠性。 QF8 用作10KV母線分段開關(guān)，它的過流保護(hù)設(shè)置，主要考慮故障運(yùn)行情況。但瞬時速斷的動作電流若安常規(guī)方法整定，對于10KV線路保護(hù)范圍就很短，有些情況下幾乎為零，故可用瞬時速斷作為主保護(hù)（保護(hù)全長），而定時過流為近后備保護(hù)。為了避免重疊和增加時限配合的困難，QF６、QF７可僅設(shè)差動保護(hù)。 斷路器上保護(hù)的設(shè)置與配合這是兩臺主變壓器側(cè)的控制開關(guān)，變壓器主保護(hù)采用差動保護(hù)和氣體保護(hù)，但為了防止外部短路引起變壓器繞組的過電流，并作為差動保護(hù)和氣體保護(hù)的后備，還必須設(shè)置定時過流和過負(fù)荷保護(hù)。所以QF3也應(yīng)設(shè)時限速斷保護(hù)，該保護(hù)只在QF3合閘運(yùn)行時起作用，即只針對故障運(yùn)行情況。第八章 繼電保護(hù)方案的初步擬定 變電所各斷路器過流保護(hù)的設(shè)置與配合 斷路器保護(hù)的設(shè)置與配合 該組35KV開關(guān)，QFQF2斷路器為進(jìn)線開關(guān)，QF3斷路器為聯(lián)絡(luò)開關(guān)，其保護(hù)設(shè)置對于正常運(yùn)行方式下35KV母線上的短路故障，應(yīng)在QFQF2 上設(shè)瞬時速斷作為主保護(hù)，并設(shè)定時過流作為后備保護(hù)，再加上前后級的時限配合，可以滿足選擇性和快速性的要求。所以方案中的LFSQ10型電流互感器滿足動穩(wěn)定性要求。 電流互感器的校驗(yàn)本設(shè)計(jì)中所選所選的KYN110型開關(guān)柜中的電流互感器型號為LFSQ10，查表得該電流互感器額定短時熱電流為63kA....。綜上所述。查表可知,所以隔離開關(guān)滿足動穩(wěn)定要求。顯然有 顯然，故該斷路器滿足要求 該斷路器使用溫度5到40度，海拔不高于1000，濕度不大于90，使用條件與上述條件符合，故滿足環(huán)境需求。 斷路器的校驗(yàn) 根據(jù)數(shù)據(jù)以及設(shè)計(jì)要求，與開關(guān)柜配套的斷路器為ZN1010，額定電壓10kv與設(shè)計(jì)相符，符合要求。（7）高壓開關(guān)柜選型匯總由負(fù)荷的性質(zhì)，大小選用高壓開關(guān)柜的型號如下表71所示。其額定電流為630A，斷路器的兩端均裝有隔離開關(guān)，以保證在雙電源回路中檢修的安全。（6）其它出線柜本設(shè)計(jì)為了避免開關(guān)柜型號過多，并且有一定的互換性，所以其他柜均選用KGN1007型高壓開關(guān)柜。（5）聯(lián)絡(luò)柜本變電所容量比較大，采用油開關(guān)聯(lián)絡(luò)，并由KGN1022和KGN1057兩個柜組成，其額定電流為1000A。額定電流為630A。（4）電容器柜因電容器總?cè)萘繛?700kvar（大于400kvar），用斷路器控制。（4）變壓器柜因?yàn)樽儔浩魅萘繛?50－1000kVA，同時考慮互換性，故應(yīng)選用帶油斷路器的開關(guān)柜，同時還要了解變壓器電能的消耗和滿足繼電保護(hù)的要求，需要兩只電流互感器。柜中斷路器、隔離開關(guān)的選擇校驗(yàn)結(jié)果見表71。（1）進(jìn)線柜因是總開關(guān)，負(fù)荷電流較大，同時還要測三相電流，所以選用KYN1－10－07作為進(jìn)線柜。無火災(zāi)、爆炸危險、嚴(yán)重污染、化學(xué)腐蝕及劇烈震動的場所。地震烈度：不超過8度；海拔高度：不超過1000m；環(huán)境溫度：上限+40℃，下限10℃；■KYN110型開關(guān)柜系三相交流50Hz、額定電壓310kV的戶內(nèi)成套配電裝置。 電壓互感器