煤礦整定值計算說明書

1、1目錄井下供電系統(tǒng)兩相短路電流計算....................................................................................................2井下供電系統(tǒng)兩相短路電流計算........................................................................................

2、............2一、K1點選擇在高壓開關(guān)進線端..........................................................................................2二、K2點選擇在500kVA變壓器出線端..............................................................................2三、

3、K3點選擇在100kVA變壓器出線端..............................................................................3四、K4（9111采面配電點）..................................................................................................3五、K5點選擇在絞

4、車房..........................................................................................................3六、K6點選擇在9112－2回風(fēng)巷掘進工作面配電點..........................................................4七、K7點選擇在968m三連運輸巷掘進工作面配電點..

5、...................................................4八、K8點選擇在971m三連回風(fēng)巷掘進工作面配電點.....................................................5九、K9點選擇在9112－2回風(fēng)巷掘進工作面?zhèn)溆镁稚扰潆婞c..........................................5十、K10點選擇在水泵房配電點..

6、..........................................................................................5十一、三專線路計算................................................................................................................6井下開關(guān)過流整

7、定計算....................................................................................................................7一、9111配電點...........................................................................................

8、............................7二、9112－2配電點整定計算.................................................................................................9三、968m三連運輸巷配電點整定計算............................................................

9、.................10四、971m三連回風(fēng)巷配電點整定計算.............................................................................10五、絞車房整定計算...............................................................................................

10、...............11六、水泵房整定計算..............................................................................................................12七、局扇供電線路整定計算......................................................................

11、............................12八、井下主變電所饋電開關(guān)電流整定計算..........................................................................14九、三專供電線路整定計算....................................................................................

12、..............18十、高壓開關(guān)整定計算..........................................................................................................19地面變電所整定值計算............................................................................

13、......................................20一、編制依據(jù)..........................................................................................................................20二、最大運行方式短路電流計算....................................

14、......................................................22三、地面高壓保護裝置整定計算..........................................................................................25管理制度......................................................

15、....................................................................................303I2===7500AI3=I2=8660AZ2UUa?046.02690??322臺500kVA變壓器一樣，所以計算結(jié)果一致。三、三、K3K3點選擇在點選擇在100kVA100kVA變壓器出線端變壓器出線端高壓側(cè)系統(tǒng)電抗、電纜阻抗折算到變壓器二次側(cè)：XW1=(Xsy

16、Xw1)()2=（0.230940.0924）()2＝0.0015Ω12UU10000690RW1=RW1()2=0.6776()2＝0.0032Ω12UU10000690變壓器后的總阻抗：RT=0.0096ΩXT=0.047Ω100kVAZ==0.047Ω212)()1(TWXXRTRw???K3點兩相短路電流：I2===7340AI3=I2=8476AZ2UUa?047.02690??32四、四、K4K4（91119111采面配電點

17、）采面配電點）電纜截面：95mm2，L=400m，電壓U=690V。干線電纜電阻電抗：XW干=XoL=0.0760.4=0.0304ΩRW干=RoL=0.1950.4=0.078Ω短路回路總阻抗：∑R=RW1RTRW干RH=0.089Ω∑X=XW1XTXW干=0.0752ΩZ==0.1165Ω???22XRK4點兩相短路電流：I2==2961AZ2UUa?五、五、K5K5點選擇在絞車房點選擇在絞車房電纜截面：35mm2，L=350m，電