【正文】
U ?? ? ? ?? KBSGZY500 移動(dòng)變電站低壓側(cè)額定電流為 385A,其過載保護(hù)的整定范圍為 ~ 1 倍的配電箱額定電流,因此過載整定為 倍的額定電流,此時(shí)過負(fù)荷保護(hù)的實(shí)際整定值為: . 0. 88 38 5 33 8op oIA? ? ? 短路保護(hù)的整定值為: . . . 10 6 6 80 66 78 2o p s S TN m NI I I A??? ? ? ? ? ? ?? 短路保護(hù)裝置的整定范圍為 3~ 10 倍的配電箱額定電流,因此過載整定為 8 倍的額定電流,此時(shí)過負(fù)荷保護(hù)的實(shí)際整定值為: 屯寶煤礦 1153 綜采工作面供電設(shè)計(jì) 25 . 8 3 3 8 2 7 0 4op sIA? ? ? 用后背保護(hù)區(qū)內(nèi)最小兩相短路電流校驗(yàn)靈敏度: . . . 5773 2 . 1 1 . 52704o p s S T N m NI I I ??? ? ? ? ?? 滿足要求。 高壓側(cè) : 過負(fù)荷保護(hù)整定為: .. 1 .1.500 2 8 . 83 3 1 0NTo p o N TNTSI I AU? ? ? ?? 變壓器高壓綜合保護(hù)箱的額定電流為 46A,取實(shí)際整定值為 倍的配電箱額定電流,即 . 26op oIA? ? ? 短路保護(hù)的整定值為 . . .1 . 2 1 . 4 1 . 2( ) ( 1 0 6 6 8 0 6 6 ) 7 8 . 210 1 . 2o p s S T N m NTI I I AK ???? ? ? ? ? ? ?? 取實(shí)際整定值為 2 倍的配電箱額定電流,即: . 3 46 13 8op oIA? ? ? 。 保護(hù)裝置的靈敏度: ( 2 ). m in.520 3 .8 1138klrT o p sIK KI? ? ? ? 滿足要求。 QJZ2022/1140 型電子式過流、短路保護(hù)整定 刮板輸送機(jī) P= 200KW Ie= (1) 過負(fù)荷保護(hù)整定值: 1 0 .9 5 1 2 5 .2 1 1 9eI KI A? ? ? ? (2) 短路保護(hù)整定值: 2 8 8 125 .2 100 1eI I A? ? ? ? (3) 靈敏度系數(shù)校驗(yàn): 屯寶煤礦 1153 綜采工作面供電設(shè)計(jì) 26 2 5 5 5 2 1 0 0 1 5 .5 1 .2II ? ? ? 滿足靈敏度要求 QJZ2022 型電子式過流、短路保護(hù)整定 采煤機(jī) P= 350KW Ie=239A a) 過負(fù)荷保護(hù)整定值: 1 239 258eI K I A? ? ? ? b) 短路保護(hù)整定值: 2 8 8 239 191 2eI I A? ? ? ? c) 靈敏度系數(shù)校驗(yàn): 2 6 4 0 7 1 9 1 2 3 .3 5 1 .2II ? ? ? 滿足靈敏度要求 KBZ400 型電子式過流、短路保護(hù)整定 轉(zhuǎn)載機(jī) P= 110KW Ie= d) 過負(fù)荷保護(hù)整定值: 1 64eI K I A? ? ? ? e) 短路保護(hù)整定值: 2 8 8 534 .4eI I A? ? ? ? f) 靈敏度系數(shù)校驗(yàn): 屯寶煤礦 1153 綜采工作面供電設(shè)計(jì) 27 2 4 6 2 9 5 3 4 .4 8 .6 1 .2II ? ? ? 滿足靈敏度要求 QJZ2022 型電子式過流、短路保護(hù)整定 乳化液泵 P= 200KW Ie=148A g) 過負(fù)荷保護(hù)整定值: 1 148 140eI K I A? ? ? ? h) 短路保護(hù)整定值: 2 8 8 148 114 8eI I A? ? ? ? i) 靈敏度系數(shù)校驗(yàn): 2 640 7 118 4 ? ? ? 滿足靈敏度要求 QJZ200/1140( 660)磁力起動(dòng)器過流、短路保護(hù)整定 1153 下順槽皮帶電機(jī) P= 90KW Ie=66A 過負(fù)荷保護(hù)整定值: 1 66 K I A? ? ? ? 短路保護(hù)整定值: 2 8 8 6 6 5 2 8eI I A? ? ? ? 靈敏度系數(shù)校驗(yàn): 2 273 5 528 ? ? ? 滿足靈敏度要 短路計(jì)算 ( 1) 800KVA/10KV 移動(dòng)變電站 T1, T3, T4,技術(shù)參數(shù): 屯寶煤礦 1153 綜采工作面供電設(shè)計(jì) 28 容量 800KVA,短路電壓百分?jǐn)?shù) 5%,短路銅損 6658W,二次側(cè)電壓 查表得 移動(dòng)處短路電流為 5552A, T2 移變;前、后部刮板輸送機(jī)。 ( 2) 500KVA/10KV 移動(dòng)變電站 T技術(shù)參數(shù): 容量 500KVA,短路電壓百分?jǐn)?shù) (UK%/100)=5%,短路銅損 3452W,二次側(cè)平均電壓 , T2 移變 。+966 順槽的張緊絞車、順槽皮帶、潛水泵、信號(hào)照明、 JH14 絞車一臺(tái), +1007 順槽的無極繩絞車、潛水泵、信號(hào)照明、潛水泵。 查表得移動(dòng)處短路電流為 4629A. 屯寶煤礦 1153 綜采工作面供電設(shè)計(jì) 29 第 4 章 供電系統(tǒng) 圖 采面 10kV 高壓電源由井下采區(qū)變電所 PJG10Y 型高壓防爆開關(guān)饋出,電纜由軌道上山至 1153 工作面軌道順槽到采面移動(dòng)變電站處,經(jīng)降壓后為采面設(shè)備供電。 詳見《 1153 綜采工作面供電系統(tǒng)圖》。 附:供電系統(tǒng)圖 : 屯寶煤礦 1153 綜采工作面供電設(shè)計(jì) 30 結(jié)論 通過本次 1153 采區(qū)供電設(shè)計(jì),結(jié)合現(xiàn)場實(shí)際,在高壓開關(guān)上選擇BGP9K6G 型高壓防爆開關(guān),該開關(guān)裝置由絕緣監(jiān)視、漏電、過載、短路、欠電壓、過電壓、瓦斯電或風(fēng)電閉鎖等保護(hù)功能,還裝設(shè)高壓開關(guān)綜合保護(hù)監(jiān)控器。將 所學(xué)的專業(yè)知識(shí)應(yīng)用到實(shí)際工作當(dāng)中,克服設(shè)計(jì)過程中的困難,本著實(shí)用、可行、安全、經(jīng)濟(jì)的原則,在老師的指導(dǎo)下,獨(dú)立完整的完成一個(gè)成熟的供電設(shè)計(jì)。 屯寶煤礦 1153 綜采工作面供電設(shè)計(jì) 31 致謝 在畢業(yè)設(shè)計(jì)過程中,自始至終得到了薛風(fēng)老師的大力鼓舞和幫助,畢業(yè)設(shè)計(jì)都是在薛風(fēng)老師的指導(dǎo)下完成的,為此付出了很大的心血,在學(xué)習(xí)即將結(jié)束的時(shí)刻,向薛風(fēng)老師致 以深深的敬意和誠摯的感謝! 本次設(shè)計(jì)是學(xué)生初次設(shè)計(jì),由于本人水平有限,加之時(shí)間倉促,又缺乏經(jīng)驗(yàn),在此設(shè)計(jì)中一定會(huì)出現(xiàn)許多錯(cuò)誤和不當(dāng)之處,誠懇的希望各位領(lǐng)導(dǎo)和老師批評(píng)指正,以便在今后的工作中少出現(xiàn)錯(cuò)誤,做一對(duì)礦山建設(shè)有用的人才。 在此,向各位領(lǐng)導(dǎo)及各位老師表示衷心地感謝。 屯寶煤礦 1153 綜采工作面供電設(shè)計(jì) 32 參考文獻(xiàn) 1 陶馳東主編 《采掘機(jī)械》 北京煤礦工業(yè)出版社 1993 2 劉思注等編 《煤礦供電》 煤炭工業(yè)出版社 1980 年 3 國家煤礦安全監(jiān)察局 《煤礦安全規(guī)程》 煤碳工業(yè)出版社 2022年 4 郭玉等編 《礦山電工學(xué)》 煤炭工業(yè)出版社 1984 年 5 煤炭部制定 《煤炭工業(yè)設(shè)計(jì)規(guī)范》 煤炭工業(yè)出版社 1980 年 6 孫九如,徐蒙良,盧維東主編 《采掘機(jī)械》 中國礦業(yè)大學(xué)出版社 1990 年 7 王志勇等編 《煤礦專用設(shè)備設(shè)計(jì)計(jì)算》 煤礦工業(yè)出版社 1979年 8 馬新民主編 《礦山機(jī)械》 中國 礦業(yè)大學(xué)出版社 1999 年 9 劉兵主編 《礦山供電》 中國礦業(yè)大學(xué)出版社 2022 年 33 Visafree policy brings Chengdu biz, tourism boost. Making national headlines several times, Chengdu39。s 72hour visafree policy has attracted wide attention from both Chinese and foreign experts and businessmen since it took effect on Sept 1 last year. The program permits citizens from 51 countries and regions including the United States, Australia, Canada and Japan who have valid visas and flight tickets to a third country to spend three days in the city. The capital of Sichuan province is the first city in the western region of China to offer foreign tourists a threeday visa and the fourth nationwide to adopt the policy following Shanghai, Beijing and Guangzhou. Li Zhiyong, deputy dean of the tourism institute at Sichuan University, said the move contributes to a large increase in the number of overseas tourists and raises the city39。s level of internationalization. The policy will also bring direct economic revenue, Li said. Chengdu has many cultural legacies and is also a paradise for panda lovers with the world39。s largest breeding and research center. Three days are long enough for foreign visitors to visit those iconic tourist spots, he noted. The city is home to the remains of the Jin sha civilization that dates back more than 3,000 years as well as the Qing cheng Mountains and the Du jiang yan irrigation system. Qing cheng has long been recognized as the birthplace of Taoism, China39。s ancient indigenous religion, while Du jiang yan is considered to be the oldest functioning watercontrol project in the world. Chengdu ranked third in tourist facilities, management and services among 60 Chinese cities in a customer satisfaction survey released last year. But, Li added that efforts are still needed to develop more tourism products, improve English services and provide accurate translation of traffic signs and scenic billboards. Zhao Yun, chairwoman of British Chamber of Commerce Southwest China, told China Daily that his colleagues found the policy very convenient. A British client once flew here and stayed for just one day to check her ordered goods, she said. Zhao was born in Shanxi province, but she has lived in Chengdu for more than 10 years. My life was like a running race moving from place to place. I also lived in Beijing and Shanghai before, she said. But Chengdu is a place that you never want to leave onc