主运带 移变、开关整定计算

1一、主运带巷机电硐室移动变电站的整定计算（一）、移动变电站高压馈电开关的过载保护整定负荷统计：∑PN=340KW1）、长时工作电流：Ica=Kde∑PN/（√3VNcosΦwm）=0.54*340/(1.732*6.3*0.85)=19.8A确定整定值Ise=1.2*Ica.=1.2*19.8≈23.8A2）、短路保护整定由过载保护确定短路保护整定值Isb.r=(1.2~1.4)*(Ist.m+∑IN)=1.4*（22+19）=41A3)、灵敏度的校验a系统电抗值XSY=V2ar/SS=0.692/800=0.000595ΩbUGSP3*501460m电缆的电阻R1和电阻X1R1=R01L1/K2SC=0.1*1.46/（6/0.69）2=0.002ΩX1=X01*L1/K2SC=0.06*1.46/（6/.69）2=0.001Ωc变压器的电阻和电抗值ZT=vsV2ar.T/(100SN.T)=4.43*0.692/(100*0.63)=0.0334ΩRT=△pN.TV2ar.T/S2N.T=4000×0.692/8002=0.005ΩXT=√ZT2-R2T=√0.03342-0.0052=0.0331Ω△pN.T：变压器功率损耗，4000W2vs（%）：变压器的阻抗电压百分数，4.43（%）dUPQ–1.143*701400m电缆的电阻R3和电阻X3R2=R03L3=0.267*1.4=0.3738ΩX2=X03*L3=0.078*1.4=0.1092ΩeUP–1.143*1610m电缆的电阻R3和电阻X3R3=R03L=1.16*0.01=0.0116ΩX3=X03*L=0.090*0.01=0.0009Ω最远点电机机的三相短路电流I（3）d=Var/（√3*√ΣR2+ΣX2）=690/（1.732*√0.39932+0.13472）=945A两相短路电流I（2）d=0.87*Id（3）=0.87*945=822Af灵敏度校验Kr=I（2）d/Isb=822/41=20＞1.2符合要求（二）、移动变电站低压馈电开关的过载保护整定1）、长时工作电流：Ica=Kde∑PN/（√3VNcosΦwm）=0.54*340/(1.732*0.69*0.85)=180A确定整定值Ise=1.2*Ica.=1.2*106≈216A2）、短路保护整定由过载保护确定短路保护整定值Isb.r=(1.2~1.4)*(Ist.m+∑IN)=1.2*（169+160）=329A33)、灵敏度的校验a系统电抗值XSY=V2ar/SS=0.692/800=0.000595ΩbUGSP3*501460m电缆的电阻R1和电阻X1R1=R01L1/K2SC=0.1*1.46/（6/0.69）2=0.002ΩX1=X01*L1/K2SC=0.06*1.46/（6/.69）2=0.001Ωc变压器的电阻和电抗值ZT=vsV2ar.T/(100SN.T)=4.43*0.692/(100*0.63)=0.0334ΩRT=△pN.TV2ar.T/S2N.T=4000×0.692/8002=0.005ΩXT=√ZT2-R2T=√0.03342-0.0052=0.0331Ω△pN.T：变压器功率损耗，4000Wvs（%）：变压器的阻抗电压百分数，4.43（%）dUPQ–1.143*701400m电缆的电阻R3和电阻X3R2=R03L3=0.267*1.4=0.3738ΩX2=X03*L3=0.078*1.4=0.1092ΩeUP–1.143*1610m电缆的电阻R3和电阻X3R3=R03L3=1.16*0.01=0.0116ΩX3=X03*L3=0.090*0.01=0.0009Ω最远点电机机的三相短路电流I（3）d=Var/（√3*√ΣR2+ΣX2）=690/（1.732*√0.39932+0.13472）=945A两相短路电流4I（2）d=0.87*Id（3）=0.87*945=822Af灵敏度校验Kr=I（2）d/Isb=822/329=2.5＞1.2符合要求二、主运带移变馈电、开关整定计算1、控制主运皮带机的KJ25-400馈电整定计算(1)短路保护整定Isb≥Ist.m+∑IN=5*185+330=515A(2)灵敏度校验aXSY=V2ar/SS=0.692/800=0.000595ΩbUGSP3*9560m电缆的电阻R1和电阻X1R1=R01L1/K2SC=0.1*0.046/（6/0.69）2=0.002ΩX1=X01*L1/K2SC=0.06*0.046/（6/.69）2=0.001Ωc变压器的电阻和电抗值ZT=vsV2ar.T/(100SN.T)=4.43*0.692/(100*0.63)=0.0334ΩRT=△pN.TV2ar.T/S2N.T=4000×0.692/8002=0.005ΩXT=√ZT2-R2T=√0.03342-0.0052=0.0331Ω△pN.T：变压器功率损耗，4000Wvs（%）：变压器的阻抗电压百分数，4.43（%）dUPQ–1.143*701400m电缆的电阻R3和电阻X3R2=R02L2=0.267*1.4=0.3738Ω5X2=X02*L2=0.078*1.4=0.1092ΩeUP–1.143*1610m电缆的电阻R3和电阻X3R3=R03L3=1.16*0.01=0.0116ΩX3=X03*L3=0.090*0.01=0.0009Ω最远点电机机的三相短路电流I（3）d=Var/（√3*√ΣR2+ΣX2）=690/（1.732*√0.39932+0.13472）=945A两相短路电流I（2）d=0.87*Id（3）=0.87*945=822Af灵敏度校验Kr=I（2）d/Isb=822/254=3.2＞1.2符合要求2、控制中间巷DW80-200馈电整定计算(1)、短路保护整定Isb≥Ist.m+∑IN=5*41.72+75=284A（2）、灵敏度校验aXSY=V2ar/SS=0.692/800=0.000595ΩbUGSP3*501460m电缆的电阻R1和电阻X1R1=R01L1/K2SC=0.1*1.46/（6/0.69）2=0.002ΩX1=X01*L1/K2SC=0.06*1.46/（6/.69）2=0.001Ωc变压器的电阻和电抗值ZT=vsV2ar.T/(100SN.T)=4.43*0.692/(100*0.63)=0.0334Ω6RT=△pN.TV2ar.T/S2N.T=4000×0.692/8002=0.005ΩXT=√ZT2-R2T=√0.03342-0.0052=0.0331Ω△pN.T：变压器功率损耗，4000Wvs（%）：变压器的阻抗电压百分数，4.43（%）dUPQ–1.143*701000m电缆的电阻R3和电阻X3R2=R02L2=0.267*1.0=0.267ΩX2=X02*L2=0.078*1.0=0.078ΩeUP–1.143*1610m电缆的电阻R3和电阻X3R3=R03L3=1.16*0.01=0.0116ΩX3=X03*L3=0.090*0.01=0.0009Ω最远点电机机的三相短路电流I（3）d=Var/（√3*√ΣR2+ΣX2）=690/（1.732*√0.28562+0.11422）=1295A两相短路电流I（2）d=0.87*Id（3）=0.87*1295=1127Af灵敏度校验Kr=I（2）d/Isb=1127/284=3.97＞1.2符合要求3、主运带巷机电硐室QBZ-80开关整定计算1)过载保护整定由拉紧电机额定电流IN=8.7A，确定整定值为ISe=9A7短路保护整定选整定值为Isb。r=4Ise=4×9=36A校验短路保护的灵敏度a系统电抗值XSY=V2ar/SS=0.692/800=0.000595ΩbUGSP3*501460m电缆的电阻R1和电阻X1R1=R01L1/K2SC=0.1*1.46/（6/0.69）2=0.0019ΩX1=X01*L1/K2SC=0.06*1.46/（6/.69）2=0.00116Ωc变压器的电阻和电抗值ZT=vsV2ar.T/(100SN.T)=4.43*0.692/(100*0.63)=0.0334RT=△pN.TV2ar.T/S2N.T=4000×0.692/8002=0.005ΩXT=√ZT2-R2T=√0.03342-0.0052=0.0331ΩdUPQ–1.143*70200m电缆的电阻R3和电阻X3R2=R02L2=0.267*0.2=0.0534ΩX2=X02*L2.=0.078*0.2=0.0156ΩeUP–6603*1620m电缆的电阻R3和电阻X3R3=R03L3=1.16*0.02=0.0232ΩX3=X03*L3=0.09*0.02=0.0018Ω最远点的三相短路电流I（3）d=Var/（√3*√ΣR2+ΣX2）8=690/（1.732*√0.08072+0.02052）=2762A两相短路电流I（2）d=0.87*Id（3）=0.87*2762=2403Af灵敏度校验Kr=I（2）d/Isb=2403/168=14.3＞1.2合格二、06回顺46联巷移动变电站的整定计算负荷统计：∑PN=200KW（一）、移动变电站高压馈电开关的过载保护整定长时工作电流：Ica=Kde∑PN/（√3VNcosΦwm）=0.54*200/(1.732*6.3*0.85)=12A确定整定值Ise=1.2*Ica.=1.2*12≈14.4A2）、短路保护整定由过载保护确定短路保护整定值Isb.r=(1.2~1.4)*(Ist.m+∑IN)=1.3*（49+12）=79A3)、灵敏度的校验a系统电抗值XSY=V2ar/SS=0.692/500=0.0009522ΩbUGSP-63*50和UGSP-103*353600m电缆的电阻R1和电阻X1R1=R01L1/K2SC=0.1*3.6/（6/0.69）2=0.0047ΩX1=X01*L1/K2SC=0.06*3.6/（6/.69）2=0.0028Ω9c变压器的电阻和电抗值ZT=vsV2ar.T/(100SN.T)=4.43*0.692/(100*0.50)=0.0422ΩRT=△pN.TV2ar.T/S2N.T=4000×0.692/5002=0.00762ΩXT=√ZT2-R2T=√0.04222-0.007622=0.0415Ω△pN.T：变压器功率损耗，4000Wvs（%）：变压器的阻抗电压百分数，4.43（%）dUPQ–1.143*701500m电缆的电阻R3和电阻X3R2=R02L2=0.267*1.5=0.4005ΩX2=X02*L2=0.078*1.5=0.117ΩeUP–1.143*610m电缆的电阻R3和电阻X3R3=R03L3=1.16*0.01=0.0116ΩX3=X03*L3=0.090*0.01=0.0009Ω最远点电机机的三相短路电流I（3）d=Var/（√3*√ΣR2+ΣX2）=690/（1.732*√0.42442+0.16342）=876A两相短路电流I（2）d=0.87*Id（3）=0.87*876=762Af灵敏度校验Kr=I（2）d/Isb=762/79=9.6＞1.2符合要求（二）、移动变电站低压馈电开关的过载保护整定1)、长时工作电流：Ica=Kde∑PN/（√3VNcosΦwm）10=0.54*200/(1.732*0.69*0.85)=106A确定整定值Ise=1.2*Ica.=1.2*106≈128A2）、短路保护整定由过载保护确定短路保护整定值Isb.r=(1.2~1.4)*(Ist.m+∑IN)=1.2*（95+123）=218A3)、灵敏度的校验a系统电抗值XSY=V2ar/SS=0.692/500=0.0009522ΩbUGSP3*50和UGSP-103*353600m电缆的电阻R1和电阻X1R1=R01L1/K2SC=0.1*3.6/（6/0.69）2=0.0047ΩX1=X01*L1/K2SC=0.06