《高壓開關(guān)柜保護(hù)計算》由會員分享,可在線閱讀,更多相關(guān)《高壓開關(guān)柜保護(hù)計算(6頁珍藏版)》請在裝配圖網(wǎng)上搜索。
1、阻抗計算:L(KM)計算值1。系統(tǒng)阻抗標(biāo)幺值:最大最小短路容量(MVA)2283.10 1428.5700短路標(biāo)幺值X*=Sj/Sdx0.040.07002。線路:每KM估算值X*電纜(6KV)0.1760 Xl*=X*L*Sj/U/U=電纜(10KV)0.0730 Xl*=X*L*Sj/U/U=0.700.0256雙電纜架空(6KV)0.8820 Xl*=X*L*Sj/U/U=架空(10KV)0.3170 Xl*=X*L*Sj/U/U=架空(35KV)0.0290 Xl*=X*L*Sj/U/U=架空(110KV)0.0030 Xl*=X*L*Sj/U/U=3。線路:柜出線電纜電纜(6KV)0
2、.1760 Xl*=X*L*Sj/U/U=電纜(10KV)0.0730 Xl*=X*L*Sj/U/U=0.050.0037雙電纜4。變壓器:容量電壓等級阻抗電壓阻抗標(biāo)幺值KVAKV%Xb*變壓器:50000.00110/6.310.50Xb*=Xd%/Se=0.2100變壓器:40000.00110/6.310.500.2625變壓器:31500.00110/6.310.500.3333變壓器:25000.00110/6.310.500.4200變壓器:16000.00110/6.310.500.6563變壓器:12000.00110/6.310.500.8750變壓器:10000.00110
3、/6.310.501.0500變壓器:7200.00110/6.310.501.4583變壓器:5100.00110/6.310.502.0588變壓器:2700.00110/6.310.503.8889變壓器:2500.00110/6.310.504.2000變壓器:1600.0010(6)/0.44.502.8125變壓器:1250.0010(6)/0.44.503.6000變壓器:1000.0010(6)/0.44.504.5000變壓器:800.0010(6)/0.44.505.6250變壓器:750 10(6)/0.44.506.0000變壓器:630 10(6)/0.44.507.
4、1429變壓器:500 10(6)/0.44.509.0000變壓器:240 10(6)/0.44.5018.7500變壓器:30 10(6)/0.44.50150.0000電容電流(A)電纜線路Ie=0.1UeL55.2500架空線路Ie=UeL/350一、系統(tǒng)參數(shù)圖:二、短路參數(shù)圖:三、短路參數(shù)計算:短路點系統(tǒng)K1,1K2,3K4K5K6,7K8K9系統(tǒng)電壓KV110.0010.5010.5010.5010.5010.5010.5010.50最大阻抗Xmax*0.040.370.070.112.873.670.08150.07最小阻抗Xmin*0.070.400.100.142.903.7
5、00.11150.10短路電流ImaxKA209.2324.58124.1880.533.192.49109.360.06短路電流IminKA130.9222.9791.6465.463.162.4883.310.06沖擊電流ichKA533.5362.68316.65205.358.136.36278.860.16沖擊電流IchKA315.9337.12187.51121.604.823.77165.130.09短路容量SdMVA2283.11268.241355.01878.7334.8027.221193.320.67四、保護(hù)定值表:高壓柜名稱單位 符號進(jìn)線柜風(fēng)機(jī)柜1變壓器柜 2變壓器柜
6、 3變壓器柜 電容柜母聯(lián)柜設(shè)備數(shù)量2.003.002.002.001.002.001.00設(shè)備容量KW8874.003200.001600.001250.0030.001500.005000.00額定電壓KV10.5010.5010.5010.5010.5010.5010.50計算電流A487.96219.9587.9868.731.6582.48274.94互感器變比200.0080.0030.0030.0030.00200.00最大運行方式短路電流 A最小運行方式短路電流 A過流保護(hù)一段電流AI1zd18.7110.31136.94107.336.8718.71過流保護(hù)一段時限STI10.
7、000.000.000.000.000.00過流保護(hù)二段電流AI2zd16.103.4412.719.934.7716.10過流保護(hù)二段時限STI20.1530.000.500.500.500.15過流保護(hù)三段電流AI3zd12.719.93退出過流保護(hù)三段時限STI30.500.50過負(fù)荷動作電流AIload3.663.023.582.802.06過負(fù)荷動作時限STload發(fā)信25.000.001.00發(fā)信低電壓保護(hù)定值VUlzd70.0050.00低電壓保護(hù)時限STul30.002.00低電壓保護(hù)定值VU2zd低電壓保護(hù)時限STu2過電壓保護(hù)定值VUhzd110.00過電壓保護(hù)時限STuh30.00中性點不平衡電流AICLzd4.200.880.690.41中性點不平衡電流時限 STICL0.501.500.20中性點不平衡電壓VUCYzd15.00中性點不平衡電壓時限 STUCL0.20電流差動定值A(chǔ)ICLzd5.50電流差動時限STICL0.50