典型支路的整定

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1附录1:部分线路短路计算及保护整定示例等效短路模型:2系统接线:最大运行方式接线图最小运行方式接线图(基准容量为1000MVA)井上部分:(6KV母线阻抗)最大运行方式:*dX14.655*dR1.277(1#2#主变并列运行)最小运行方式:*dX24.491*dR2.355(2#3#主变分列运行)井下部分:(下井线路)最大运行方式:*dX1.113*dR1.735(6207#单独供电)最小运行方式:*dX2.083*dR2.178(6107#单独供电)线路与变压器参数表:线路名称编号截面(mm)电阻(/km)电抗(/km)长度(km)总电阻标么值总电抗标么值6KV母线SS////1.2772.355(MIN)14.68824.671(MIN)6212#至补偿站SL1950.190.0890.10.4790.2256207#至中央变SL21500.1450.0930.95/21.7351.1136107#至中央变SL22400.0910.0870.952.1782.083中央变至石门变SL31500.1450.0930.7722.8201.809石门变至上仓变SL4350.6220.1130.5047.8981.4353变压器名称编号变压器容量(MVA)电压百分比(%)阻抗标么值中央2#动变ST10.23.985+j1954#移变ST20.63510.078+j79.36532#移变ST30.63510.078+j79.36510#移变ST40.63510.078+j79.36512#移变ST50.63510.078+j79.365石门1#动变ST10.54.0327.6+j80.6上仓1#动变ST70.54.0027.6+j80一、短路电流计算(1)0d短路取jU6.3kv,有100091.65()1.7326.33jjjSIKAU稳态最大短路电流:0091.656.229()14.71jdMAXdIIKAZ最大短路容量:00max100067.980()14.71jddSSMVAZ同理最小短路电流、最小短路容量为:0mindI3725KA0mindS40.643MVA(2)1d短路取jU6.3kv,有100091.65()1.7326.33jjjSIKAU1d点短路电路的总电抗:1114.6550.22414.879dssLXXX1d点短路电路的总电阻:4111.2770.4791.756dSSLRRR1d点短路电路的总阻抗:111222214.8791.75614.982dddZXR稳态最大短路电流:1191.656.117()14.982jdMAXdIIKAZ最大短路容量:11max100066.745()14.982jddSSMVAZ同理最小短路电流、最小短路容量为:1mindI3.684KA1mindS40.198MVA(3)2d短路取jU6.3kv,有100091.65()1.7326.33jjjSIKAU2d点短路电路的总电抗:2214.6551.11315.768dssSLXXX2d点短路电路的总电阻:221.2771.7353.012dSSSLRRR2d点短路电路的总阻抗:222222215.7683.01216.053dddZXR稳态最大短路电流:2291.655.709()16.053jdMAXdIIKAZ最大短路容量:22max100065.293()16.053jddSSMVAZ5同理最小短路电流、最小短路容量为:2mindI3.399KA2mindS37.095MVA(4)3d短路取jU0.69kv,有1000836.76()1.7320.693jjjSIKAU3d点短路电路的总电抗:32114.6551.113195210.768dssSLSTXXXX3d点短路电路的总电阻:3211.2771.7358588.012dSSSLSTRRRR3d点短路电路的总阻抗:3332222210.76888.012228.406dddZXR稳态最大短路电流:33836.763.663()228.406jdMAXdIIKAZ最大短路容量:33max10004.378()228.406jddSSMVAZ同理最小短路电流、最小短路容量为:3mindI3.501KA3mindS4.184MVA(5)4d短路取jU6.3kv,有100091.65()1.7326.33jjjSIKAU4d点短路电路的总电抗:42314.6551.1131.80917.577dssSLSLXXXX64d点短路电路的总电阻:4231.2771.7352.825.832dSSSLSLRRRR4d点短路电路的总阻抗:444222217.5775.83218.519dddZXR稳态最大短路电流:4491.654.949()18.519jdMAXdIIKAZ最大短路容量:44max100053.998()18.519jddSSMVAZ同理最小短路电流、最小短路容量为:4mindI3.126KA4mindS34.106MVA(6)5d短路取jU0.69kv,有1000836.76()1.7320.693jjjSIKAU5d点短路电路的总电抗:523214.6551.1131.80979.36596.942dssSLSLSTXXXXX5d点短路电路的总电阻:52311.2771.7352.8210.07815.91dSSSLSLSTRRRRR5d点短路电路的总阻抗:555222296.94215.9198.239dddZXR稳态最大短路电流:55836.768.517()98.239jdMAXdIIKAZ7最大短路容量:55max100010.179()98.239jddSSMVAZ同理最小短路电流、最小短路容量为:5mindI7.666KA5mindS9.162MVA(7)6d短路计算过程同5d点短路最大短路电流、最大短路容量为:6dMAXI=5.155KA6maxdS=10.179MVA最小短路电流、最小短路容量为:6mindI4.640KA6mindS9.162MVA(8)7d短路计算过程同5d点短路最大短路电流、最大短路容量为:7dMAXI8.517KA7maxdS10.179MVA最小短路电流、最小短路容量为:7mindI7.666KA7mindS9.162MVA(9)8d短路计算过程同5d点短路最大短路电流、最大短路容量为:8dMAXI8.517KA8maxdS10.179MVA最小短路电流、最小短路容量为:8mindI7.666KA8mindS9.162MVA(10)9d短路取jU6.3kv,有100091.65()1.7326.33jjjSIKAU89d点短路电路的总电抗:923414.6561.1131.8091.43519.012dssSLSLSLXXXXX9d点短路电路的总电阻:92341.2771.7352.827.89812.453dSSSLSLSLRRRRR9d点短路电路的总阻抗:999222219.01212.45323.451dddZXR稳态最大短路电流:9991.653.908()23.451jdMAXdIIKAZ最大短路容量:99max100042.641()23.451jddSSMVAZ同理最小短路电流、最小短路容量为:9mindI2.736KA9mindS29.858MVA(11)10d短路计算过程同5d点短路最大短路电流、最大短路容量为:10dMAXI8.068KA10maxdS9.642MVA最小短路电流、最小短路容量为:10mindI7.311KA10mindS8.737MVA(12)11d短路取jU0.69kv,有1000836.76()1.7320.693jjjSIKAU11d点短路电路的总电抗:911234714.6551.1131.8091.4358099.012dssSLSLSLSTXXXXXX11d点短路电路的总电阻:1123471.2771.7352.827.89827.641.330dSSSLSLSLSTRRRRRR11d点短路电路的总阻抗:111111222299.01241.330107.292dddZXR稳态最大短路电流:1111836.767.799()107.292jdMAXdIIKAZ最大短路容量:1111max10009.320()107.292jddSSMVAZ同理最小短路电流、最小短路容量为:11mindI7.098KA11mindS8.483MVA二、各短路点三相短路电流值单位:KA、MVA短路点0d1d2d3d4d5d6d7d8d9d10d11d(3).maxdI6.2296.1175.7093.6634.9498.5175.1558.5178.5173.9088.0687.799maxdS67.9866.74562.2934.37853.99810.17910.17910.17910.17942.6419.6429.320(3).mindI3.7253.6843.3993.5013.1267.6664.6407.6667.6662.7367.3117.098mindS40.64340.19837.0954.18434.1069.1629.1629.1629.16229.8588.7378.483三、开关的整定(1)4#32#移变高压侧开关保护开关型号KYGC-Z(150/5)继电器DL-13○1过流保护按躲过可能出线的最大过负荷电流整定,63060.691.7363NNNSIAU102260.691.21.05.7120.8530NdzrelcreIIkkAknrelk—可靠系数,取1.2ck—接线系数接于相电流取1,接于相电流差取3rek—返回系数微机保护取1.0,机电型继电器取0.85取dzI5A动作时限10s。灵敏度校验:.min.2763.465.091.5530ksendzIkIn.minkI—系统最小运行方式下,低压侧两相短路时流过高压侧的短路电流。○2速断保护按躲过系统最大运行方式下低压侧三相短路时流过高压侧的电流整定(3)5.max1.21.097939.230relcdzdkkIIAn(3)5.maxdI—最大运行方式下变压器低压侧三相短路流过高压侧的电流。取dzI=37A灵敏度校验:(2).min0.8731262.4523730dsendzIkIn(2).mindI—系统最小运行方式下,保护装置安装处两相短路电流(2)10#12#移变高压侧开关保护开关型号KYGC-Z(100/5)继电器DL-13○1过流保护按躲过可能出线的最大过负荷电流整定,63060.691.7363NNNSIAU112260.691.21.08.570.8520NdzrelcreIIkkAkn取dzI8A动作时限10s。灵敏度校验:.min.2763.464.771.5820ksendzIkIn.minkI—系统最小运行方式下,低压侧两相短路时流过高压侧的短路电流。○2速断保护按躲过系统最大运行方式下低压侧三相短路时流过高压侧的电流整定(3)5.max1.21.097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