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1、工工程程中中短短路路電電流流實(shí)實(shí)用用計計算算表表(有有名名值值計計算算)系統(tǒng)電抗最大運(yùn)行方式最小運(yùn)行方式進(jìn)線架空線路長度km1.0870.370.47電抗（/km）0.35平均電抗（/km）0.350.381B變壓器容量kVA800短路電壓%4.51B變壓器電抗（10.5kV側(cè)）2B變壓器容量kVA1000短路電壓%62B變壓器電抗（10.5kV側(cè)）3B變壓器容量kVA1250短路電壓%63B變壓器電抗（10.5kV側(cè)）4B變壓器容量kVA1600短路電壓%64B變壓器電抗（10.5kV側(cè)）10kV出線1電抗架空線路長度km電纜長度km10kV出線2電抗架空線路長度km電纜長度km10kV出線
2、3電抗架空線路長度km電纜長度km10kV出線4電抗架空線路長度km電纜長度km短路點(diǎn)最大運(yùn)行方式下最小運(yùn)行方式下短路點(diǎn)阻抗（折算到10.5kV側(cè)）三相短路電流kA(折算到10.5kV側(cè))三相短路容量MVA短路點(diǎn)阻抗（折算到10.5kV側(cè)）用戶10kV母線0.847.217131.2500.941B變壓器0.4kV側(cè)7.040.86115.6617.142B變壓器0.4kV側(cè)7.460.81314.7797.563B變壓器0.4kV側(cè)6.130.98917.9856.234B變壓器0.4kV側(cè)4.971.22022.1835.0710kV出線1末端0.000.0000.0000.0010kV出
3、線2末端0.000.0000.0000.0010kV出線3末端0.000.0000.0000.0010kV出線4末端0.000.0000.0000.00開關(guān)柜保護(hù)點(diǎn)CT變比(只填寫分子)過電流整定值(A)時限(s)總進(jìn)線母線60040.31B變壓器1B15030.22B變壓器2B20030.23B變壓器3B25030.24B變壓器4B30030.210kV出線1出線100.210kV出線2出線200.210kV出線3出線300.210kV出線4出線400.2表格使用條件：1、短路電路中總電阻R1/3總電抗X（即忽略電阻）。2、短路點(diǎn)遠(yuǎn)離發(fā)電機(jī)端（無限大電源容量系統(tǒng)）。3、為工程中實(shí)用計算值，算
4、出的值比實(shí)際值稍大，但用稍大的值去校驗(yàn)高壓電器更加安全。高壓電器短路穩(wěn)定校驗(yàn)動穩(wěn)定校驗(yàn)熱穩(wěn)定校驗(yàn)高壓電器用戶10kV母線側(cè)短路最大峰值電流(kA)電器峰值耐受電流(kA)校驗(yàn)結(jié)果短路熱效應(yīng)Qt(kA2*S)進(jìn)線柜斷路器1250A/31.5kA18.4080滿足18.23進(jìn)線柜電流互感器80滿足計量柜電流互感器37.5滿足出線柜斷路器630A/25kA63滿足出線柜電流互感器50滿足滿足不滿足進(jìn)線電纜長度km1.071架空線和電纜電抗值可查表用實(shí)際值或用平均值102*2.5/0.4kV D,yn11電抗（/km）0.08變壓器容量油變阻抗系數(shù)干變阻抗系數(shù)平均電抗（/km）0.0850440.09
5、63446.2080446.62100445.29出線容量kVA125444.13總?cè)萘繂闻_最大短路電壓%160440.00200440.00250440.00315440.0040044最大峰值短路電流kA50044二相短路電流kA(折算到10.5kV側(cè))二相短路容量MVA6304.565.58558.64418.408004.560.7357.72110004.560.6947.29212504.560.8438.84816004.561.03610.87320004.560.0000.0000.0000.0000.0000.0000.0000.000電流速斷靈敏度整定值(A)無時限靈敏度
6、整定值(A)帶時限(0.5s)靈敏度當(dāng)線路部分無時限速斷整定無法滿足靈敏度要求時:1、改用帶時限速斷整定；2、或整定值與下級保護(hù)一樣，無選擇地動作，并以自動重合閘來補(bǔ)救;3、或由于過電流整定時間為0.3S小于0.5S，可不裝設(shè)速斷保護(hù)11.64143.3200.008.17355.325.79255.595.62244.65工工程程中中短短路路電電流流實(shí)實(shí)用用計計算算表表(有有名名值值計計算算)最小運(yùn)行方式下5.75253.72帶時限(0.2s)靈敏度0.0000.0000.000.0000.0000.000.0000.0000.000.0000.0000.00注意：1、黃色填充表格為需要填寫
7、部分，其他為自動計算部分不能修改。2、過電流整定時當(dāng)有自啟動的電機(jī)時須乘以2，靈敏度減半。電器短時耐受電流(kA)短時耐受時間(S)電器耐受熱效應(yīng)I2thtth(kA2*S)校驗(yàn)結(jié)果31.543969滿足31.543969滿足154900滿足2542500滿足2041600滿足熱穩(wěn)定校驗(yàn)當(dāng)線路部分無時限速斷整定無法滿足靈敏度要求時:1、改用帶時限速斷整定；2、或整定值與下級保護(hù)一樣，無選擇地動作，并以自動重合閘來補(bǔ)救;3、或由于過電流整定時間為0.3S小于0.5S，可不裝設(shè)速斷保護(hù)20102010年年順順德德區(qū)區(qū)變變電電站站母母線線歸歸算算阻阻抗抗及及短短路路電電流流序號站名10kV母線歸算阻
8、抗X1(SB=100MVA,UB=10.5kV)10kV母線短路電流(kA)大方式小方式大方式小方式有名值()標(biāo)幺值有名值()(三相短路)(二相短路)110kV變電站1北滘0.270.270.240.240.560.5622.4522.458.938.932陳村0.340.340.310.310.450.4517.8317.8311.1111.113道教0.30.30.270.270.410.4120.2120.2112.212.24東輝0.320.320.290.290.390.3918.9418.9412.8212.825東平0.410.410.370.370.460.4614.7914.
9、7910.8710.876富安0.30.30.270.270.40.420.2120.2112.512.57廣教0.350.350.320.320.560.5617.3217.328.938.938桂洲0.280.280.250.250.410.4121.6521.6512.212.29紅崗0.290.290.260.260.420.4220.920.911.911.910華容0.260.260.240.240.40.423.3223.3212.512.511雞洲0.350.350.320.320.50.517.3217.32101012建豐0.340.340.310.310.470.4717
10、.8317.8310.6410.6413錦湖0.30.30.270.270.40.420.2120.2112.512.514均安0.310.310.280.280.510.5119.5619.569.89.815樂從0.30.30.270.270.420.4220.2120.2111.911.916勒流0.280.280.250.250.430.4321.6521.6511.6311.6317龍江0.30.30.270.270.370.3720.2120.2113.5113.5118龍山0.330.330.30.30.480.4818.3718.3710.4210.4219倫教0.310.31
11、0.280.280.460.4619.5619.5610.8710.8720馬寧0.370.370.340.340.50.516.3816.38101021南江0.280.280.250.250.40.421.6521.6512.512.522容奇0.310.310.280.280.420.4219.5619.5611.911.923順峰0.350.350.320.320.460.4617.3217.3210.8710.8724上涌0.30.30.270.270.370.3720.2120.2113.5113.5125石洲0.370.370.340.340.450.4516.3816.3811
12、.1111.1126文登0.30.30.270.270.380.3820.2120.2113.1613.1627五沙0.370.370.340.340.470.4716.3816.3810.6410.6428西華0.360.360.330.330.490.4916.8416.8410.210.229新隆0.290.290.260.260.430.4320.920.911.6311.6330杏壇0.30.30.270.270.430.4320.2120.2111.6311.6331羊額0.330.330.30.30.430.4318.3718.3711.6311.6332涌口0.360.360.
13、330.330.450.4516.8416.8411.1111.1133元基0.380.380.340.340.460.4615.9515.9510.8710.8734中興0.280.280.250.250.350.3521.6521.6514.2914.2935群力0.240.240.220.220.350.3525.2625.2614.2914.2936霞石0.370.370.340.340.480.4816.3816.3810.4210.4237博深0.370.370.340.340.440.4416.3816.3811.3611.3638泰安0.370.370.340.340.520.
14、5216.3816.389.629.6239宏圖0.350.350.320.320.420.4217.3217.3211.911.9220kV變電站1南海0.330.330.30.30.430.4318.3718.3711.6311.632都寧0.30.30.270.270.40.420.2120.2112.512.53大良0.240.240.220.220.350.3525.2625.2614.2914.294吉安0.270.270.240.240.350.3522.4522.4514.2914.295藤沙0.30.30.270.270.350.3520.2120.2114.2914.296旭升0.250.250.230.230.310.3124.2524.2516.1316.13說明：本表計算依據(jù)為市局2010年3月發(fā)布的2010年佛山地區(qū)電網(wǎng)繼電保護(hù)整定方案中的順德區(qū)220kV、110kV變電站10kV母線歸算阻抗。
工程中短路電流實(shí)用計算表
