1、工工程程中中短短路路电电流流实实用用计计算算表表(有有名名值值计计算算)系统电抗最大运行方式最小运行方式进线架空线路长度km1.0870.370.47电抗（/km）0.35平均电抗（/km）0.350.381B变压器容量kVA800短路电压%4.51B变压器电抗（10.5kV侧）2B变压器容量kVA1000短路电压%62B变压器电抗（10.5kV侧）3B变压器容量kVA1250短路电压%63B变压器电抗（10.5kV侧）4B变压器容量kVA1600短路电压%64B变压器电抗（10.5kV侧）10kV出线1电抗架空线路长度km电缆长度km10kV出线2电抗架空线路长度km电缆长度km10kV出线
2、3电抗架空线路长度km电缆长度km10kV出线4电抗架空线路长度km电缆长度km短路点最大运行方式下最小运行方式下短路点阻抗（折算到10.5kV侧）三相短路电流kA(折算到10.5kV侧)三相短路容量MVA短路点阻抗（折算到10.5kV侧）用户10kV母线0.847.217131.2500.941B变压器0.4kV侧7.040.86115.6617.142B变压器0.4kV侧7.460.81314.7797.563B变压器0.4kV侧6.130.98917.9856.234B变压器0.4kV侧4.971.22022.1835.0710kV出线1末端0.000.0000.0000.0010kV出
3、线2末端0.000.0000.0000.0010kV出线3末端0.000.0000.0000.0010kV出线4末端0.000.0000.0000.00开关柜保护点CT变比(只填写分子)过电流整定值(A)时限(s)总进线母线60040.31B变压器1B15030.22B变压器2B20030.23B变压器3B25030.24B变压器4B30030.210kV出线1出线100.210kV出线2出线200.210kV出线3出线300.210kV出线4出线400.2表格使用条件：1、短路电路中总电阻R1/3总电抗X（即忽略电阻）。2、短路点远离发电机端（无限大电源容量系统）。3、为工程中实用计算值，算
4、出的值比实际值稍大，但用稍大的值去校验高压电器更加安全。高压电器短路稳定校验动稳定校验热稳定校验高压电器用户10kV母线侧短路最大峰值电流(kA)电器峰值耐受电流(kA)校验结果短路热效应Qt(kA2*S)进线柜断路器1250A/31.5kA18.4080满足18.23进线柜电流互感器80满足计量柜电流互感器37.5满足出线柜断路器630A/25kA63满足出线柜电流互感器50满足满足不满足进线电缆长度km1.071架空线和电缆电抗值可查表用实际值或用平均值102*2.5/0.4kV D,yn11电抗（/km）0.08变压器容量油变阻抗系数干变阻抗系数平均电抗（/km）0.0850440.09
5、63446.2080446.62100445.29出线容量kVA125444.13总容量单台最大短路电压%160440.00200440.00250440.00315440.0040044最大峰值短路电流kA50044二相短路电流kA(折算到10.5kV侧)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电流速断灵敏度整定值(A)无时限灵敏度
6、整定值(A)带时限(0.5s)灵敏度当线路部分无时限速断整定无法满足灵敏度要求时:1、改用带时限速断整定；2、或整定值与下级保护一样，无选择地动作，并以自动重合闸来补救;3、或由于过电流整定时间为0.3S小于0.5S，可不装设速断保护11.64143.3200.008.17355.325.79255.595.62244.65工工程程中中短短路路电电流流实实用用计计算算表表(有有名名值值计计算算)最小运行方式下5.75253.72带时限(0.2s)灵敏度0.0000.0000.000.0000.0000.000.0000.0000.000.0000.0000.00注意：1、黄色填充表格为需要填写
7、部分，其他为自动计算部分不能修改。2、过电流整定时当有自启动的电机时须乘以2，灵敏度减半。电器短时耐受电流(kA)短时耐受时间(S)电器耐受热效应I2thtth(kA2*S)校验结果31.543969满足31.543969满足154900满足2542500满足2041600满足热稳定校验当线路部分无时限速断整定无法满足灵敏度要求时:1、改用带时限速断整定；2、或整定值与下级保护一样，无选择地动作，并以自动重合闸来补救;3、或由于过电流整定时间为0.3S小于0.5S，可不装设速断保护20102010年年顺顺德德区区变变电电站站母母线线归归算算阻阻抗抗及及短短路路电电流流序号站名10kV母线归算阻
8、抗X1(SB=100MVA,UB=10.5kV)10kV母线短路电流(kA)大方式小方式大方式小方式有名值()标幺值有名值()(三相短路)(二相短路)110kV变电站1北滘0.270.270.240.240.560.5622.4522.458.938.932陈村0.340.340.310.310.450.4517.8317.8311.1111.113道教0.30.30.270.270.410.4120.2120.2112.212.24东辉0.320.320.290.290.390.3918.9418.9412.8212.825东平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广教0.350.350.320.320.560.5617.3217.328.938.938桂洲0.280.280.250.250.410.4121.6521.6512.212.29红岗0.290.290.260.260.420.4220.920.911.911.910华容0.260.260.240.240.40.423.3223.3212.512.511鸡洲0.350.350.320.320.50.517.3217.32101012建丰0.340.340.310.310.470.4717
10、.8317.8310.6410.6413锦湖0.30.30.270.270.40.420.2120.2112.512.514均安0.310.310.280.280.510.5119.5619.569.89.815乐从0.30.30.270.270.420.4220.2120.2111.911.916勒流0.280.280.250.250.430.4321.6521.6511.6311.6317龙江0.30.30.270.270.370.3720.2120.2113.5113.5118龙山0.330.330.30.30.480.4818.3718.3710.4210.4219伦教0.310.31
11、0.280.280.460.4619.5619.5610.8710.8720马宁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顺峰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西华0.360.360.330.330.490.4916.8416.8410.210.229新隆0.290.290.260.260.430.4320.920.911.6311.6330杏坛0.30.30.270.270.430.4320.2120.2111.6311.6331羊额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中兴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宏图0.350.350.320.320.420.4217.3217.3211.911.9220kV变电站1南海0.330.330.30.30.430.4318.3718.3711.6311.632都宁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说明：本表计算依据为市局2010年3月发布的2010年佛山地区电网继电保护整定方案中的顺德区220kV、110kV变电站10kV母线归算阻抗。