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1、精选优质文档-倾情为你奉上 电力系统综合设计 任务书一、设计题目：某化纤厂降压变电所电气设计二、设计要求：根据本厂用电负荷，并适当考虑生产的发展，按安全可靠，技术先进，经济合理的要求，确定工厂变电所的位置与型式，通过负荷计算，确定主变压器台数及容量，进行短路电流计算，选择变电所的主接线及高、低压电气设备，选择整定继电保护装置，最后按要求写出设计计算说明书，绘出设计图纸。三、设计资料设计工程项目情况如下（1）工厂总平面图见图1，图1 某化学纤维厂总平面图（1cm=200m）（2）工厂负荷数据：本工厂多数车间为3班制，年最大负荷利用小时数6400小时。本厂负荷统计资料见表1，学生组合方案见表2。表
2、1 某化学纤维厂负荷情况表序号车间设备名称安 装 容 量（kW）计 算 负 荷甲乙丙丁P（kW）Q（kvar）S（kVA）1纺炼车间纺丝机1801502002200.800.780.7885筒绞机624030560.750.750.8000烘干机788085700.751.020.7001脱水机201512180.600.800.7809通风机2002201802400.700.750.8000淋洗机1456220.750.780.7885变频机9008008409500.800.700.8192传送机423840300.800.700.8192小计16062原液车间照明10121040120
3、011600.750.70 0.8192小计3酸站照明3042602003100.650.70 0.8192小计4锅炉房照明2803202902700.750.750.8000小计5排毒车间照明1861601801400.700.600.8575小计6其他车间照明3802403002400.700.75 0.8000小计78910全厂计算负荷总计1112表2 学生组合方案序号纺炼车间原液车间酸站锅炉房排毒机房其他附属车间1ABCDEF2ABDEFC3ABEFCD4ABFCDE5BACDEF6BADEFC7BAEFCD8BAFCDE（3）供电电源情况：按与供电局协议，本厂可由东南方19公里处的城
4、北变电所110/38.5/11kV，50 MVA变压器供电，供电电压可任选。另外，与本厂相距5公里处的其他工厂可以引入10kV线路做备用电源，但容量只能满足本厂负荷的30%重要负荷，平时不准投入，只在本厂主要电源故障或检修时投入。（4）电源的短路容量（城北变电所）：35kV母线的出线断路器断流容量为1500MVA；10kV母线的出线断路器断流容量为350 MVA。（5）供电局要求的功率因素：当35kV供电时，要求工厂变电所高压侧0.9；当以10kV供电时，要求工厂变电所高压侧0.95。（6）电费制度：按两部制电费计算。变压器安装容量每1kVA为15元/月，动力电费为0.3元/kWh，照明电费为
5、0.55元/（kWh）。（7）气象资料：本厂地区最高温度为38，最热月平均最高气温29，最热月地下0.8m处平均温度为22，年主导风向为东风，年雷暴雨日数为20天。（8）地质水文资料：本厂地区海拔60m，地层以砂黏土为主，地下水位为2m。四、设计任务（一）设计计算说明书设计计算的内容，可按下列建议的标题及其顺序，逐项计算并加以说明。在各一级标题之下，根据内容层次再拟定小标题，组成一个合理的文本框架，例如：一、各车间计算负荷和无功补偿二、各车间变电所的设计选择三、工厂总降压变电所及接入系统设计四、短路电流计算五、变电所高低压电气设备的选择六、继电保护的配置七、收获和体会八、参考文献（二）设计图纸
6、1、工厂变电所设计计算用电气主接线简图2、变电所供电平面布置图某化纤降压变电所电气设计MATLAB计算程序（以第三组丁数据为例）clear all;clc;pe=220;56;70;18;240;22;950;30;pe2=1160;310;270;140;240;PP30=0;QQ30=0;Kp=0.9;Kg=0.95;kd=0.8;0.75;0.75;0.6;0.7;0.75;0.8;0.8;kd2=0.75;0.65;0.75;0.7;0.7;tan1=0.78 0.75 1.02 0.8 0.75 0.78 0.7 0.7 ;tan2=0.7 0.7 0.75 0.60 0.75;co
7、s1=cos(atan(tan1)cos2=cos(atan(tan2)P30=(pe.*kd)P302=(pe2.*kd2)Q30=(P30.*tan1)Q302=(P302.*tan2)for i=1:size(pe); PP30=PP30+P30(i); QQ30=QQ30+Q30(i);endFP=PP30*Kp;FQ=QQ30*Kg;SS1=(FP2+FQ2)(1/2);FP_FQ=FP FQF2P=P302F2Q=Q302%第二部分%1纺织 2原液 3酸 4锅 5排毒 6其他%方案 A1 B2 C5 D6 E3 F4%变电所1BF 变电所2A 变电所3CDEFP_ALL=FP F2
8、P;FQ_ALL=FQ F2Q;cs1=0.7;FP_Psum=sum(FP_ALL);FP_Qsum=sum(FQ_ALL);FP_Ssum=sqrt(FP_Psum)2+(FP_Qsum)2);%变电所1BD1P30=Kp*(FP_ALL(2)+FP_ALL(4);BD1Q30=Kg*(FQ_ALL(2)+FQ_ALL(4);BD1P30_BD1Q30=BD1P30 BD1Q30BD1QC_1=400;BD1QC1=BD1Q30-BD1QC_1;cosa1=BD1P30/sqrt(BD1P30)2+(BD1QC1)2);S1=sqrt(BD1P30)2+(BD1QC1)2);SNT1=cs
9、1*S1; %选S7_800/10BD1_deda_p0=1.54;BD1_deda_pk=9.9;BD1_Uk=4;BD1_I0=1.5;n=1;BD1_SN=800;BD1_S30=1/2*S1BD1_dedaPT=n*BD1_deda_p0+1/n*BD1_deda_pk*(BD1_S30/BD1_SN)2;BD1_dedaQT=n*BD1_I0/100*BD1_SN+1/n*BD1_Uk/100*BD1_SN*(BD1_S30/BD1_SN)2;BD1_dedaPT_BD1_dedaQT=BD1_dedaPT BD1_dedaQT%变电所2BD2P30=FP_ALL(1);BD2Q30
10、=FQ_ALL(1);format bankBD2P30_BD2Q30=(BD2P30 BD2Q30)BD2QC_1=400;%补偿为400 %常数选择BD2QC1=BD2Q30-BD2QC_1;cosa2=BD2P30/sqrt(BD2P30)2+(BD2QC1)2);S2=sqrt(BD2P30)2+(BD2QC1)2);SNT2=cs1*S2; %选S7_1000/10BD2_deda_p0=1.8;BD2_deda_pk=11.6;BD2_Uk=4;BD2_I0=1.2;n=1;BD2_SN=1000;%常数选择BD2_S30=1/2*S2BD2_dedaPT=n*BD2_deda_p
11、0+1/n*BD2_deda_pk*(BD2_S30/BD2_SN)2;BD2_dedaQT=n*BD2_I0/100*BD2_SN+1/n*BD2_Uk/100*BD2_SN*(BD2_S30/BD2_SN)2;BD2_dedaPT_BD2_dedaQT=BD2_dedaPT BD2_dedaQT%变电所3BD3P30=Kp*(FP_ALL(3)+FP_ALL(5)+FP_ALL(6);BD3Q30=Kg*(FQ_ALL(3)+FQ_ALL(5)+FQ_ALL(6);BD3P30_BD3Q30=BD3P30 BD3Q30BD3QC_1=200;BD3QC1=BD3Q30-BD3QC_1;co
12、sa3=BD3P30/sqrt(BD3P30)2+(BD3QC1)2);S3=sqrt(BD3P30)2+(BD3QC1)2); SNT3=cs1*S3; %选S7_400/10BD3_deda_p0=0.92;BD3_deda_pk=5.8;BD3_Uk=4;BD3_I0=1.9;n=1;BD3_SN=400;%常数选择BD3_S30=1/2*S3;BD3_dedaPT=n*BD3_deda_p0+1/n*BD3_deda_pk*(BD3_S30/BD3_SN)2;BD3_dedaQT=n*BD3_I0/100*BD3_SN+1/n*BD3_Uk/100*BD3_SN*(BD3_S30/BD
13、3_SN)2;BD3_dedaPT_BD3_dedaQT=BD3_dedaPT BD3_dedaQT%第三部分总降压BD4P30=2*BD1_dedaPT+BD1P30+2*BD2_dedaPT+BD2P30+2*BD3_dedaPT+BD3P30;BD4Q30=BD1QC1+2*BD1_dedaQT+BD2QC1+2*BD2_dedaQT+BD3QC1+2*BD3_dedaQT;BD4P30_BD4Q30=BD4P30 BD4Q30all_P=Kp*BD4P30;all_Q=Kg*BD4Q30;all_P_all_Q=all_P all_QBD4QC_1=0;%补偿为0 %常数选择cosa4
14、=BD4P30/sqrt(all_P)2+(all_Q-BD4QC_1)2);S4=sqrt(all_P)2+(all_Q-BD4QC_1)2);SNTT=cs1*S4; BD4_S30=1/2*S4;%选S7_2000/10BD4_deda_p0=3.4;BD4_deda_pk=19.8;BD4_Uk=6.5;BD4_I0=1.1;n=1;BD4_SN=2000;%常数选择BD4_dedaPT=n*BD4_deda_p0+1/n*BD4_deda_pk*(BD4_S30/BD4_SN)2;BD4_dedaQT=n*BD4_I0/100*BD4_SN+1/n*BD4_Uk/100*BD4_SN
15、*(BD4_S30/BD4_SN)2;BD4_dedaPT_BD4_dedaQT=BD4_dedaPT BD4_dedaQTs1_s2_s3_s4_cosa1_cosa2_cosa3_cosa4=S1 S2 S3 S4 cosa1 cosa2 cosa3 cosa4%4.1变电所线路选择line1P30=1/2*BD1P30;line1Q30=1/2*(BD1Q30-BD1QC_1); %BD1BYA1_P30=line1P30+BD1_dedaPT;BYA1_Q30=line1Q30+BD2_dedaQT;BYA1_S=sqrt(BYA1_P30)2+(BYA1_Q30)2);BYA1_I3
16、0=BYA1_S/(sqrt(3)*10);Jec1=0.9;Aec1=BYA1_I30/Jec1; %选LJ_35LJ_Iai=170;LJ_r0=0.96;LJ_x0=0.34;theta1=29;%常数选择LJ_K=sqrt(70-theta1)/(70-25);LJ_IIai=LJ_K*LJ_Iai %BYA1_I30line1P30_Q30_BYA1P30_BYA1Q30_IIai=line1P30 line1Q30 BYA1_P30 BYA1_Q30 LJ_IIailine2P30=1/2*BD2P30;line2Q30=1/2*(BD2Q30-BD2QC_1); %BD2BYA2
17、_P30=line2P30+BD2_dedaPT;BYA2_Q30=line2Q30+BD2_dedaQT;BYA2_S=sqrt(BYA2_P30)2+(BYA2_Q30)2);BYA2_I30=BYA2_S/(sqrt(3)*10);line2P30_Q30_BYA2P30_BYA2Q30_I30=line2P30 line2Q30 BYA2_P30 BYA2_Q30 BYA2_I30Jec2=0.9;Aec2=BYA2_I30/Jec2; %选LJ_35LJ2_Iai=170;LJ2_r0=0.96;LJ2_x0=0.34;theta2=29;L2=0.32;%常数选择LJ2_K=sqr
18、t(70-theta2)/(70-25);LJ2_IIai=LJ2_K*LJ2_Iai;RL2=LJ2_r0*L2;XL2=LJ2_x0*L2;line2_dedaPL2=3*(BYA2_I30)2*RL2/1000;line2_dedaQL2=3*(BYA2_I30)2*XL2/1000;first_line2P30=line2P30+line2_dedaPL2;first_line2Q30=line2Q30+line2_dedaQL2;line2dedaPL2_line2dedaQL2_firstline2P30_firstline2Q30=line2_dedaPL2 line2_deda
19、QL2 first_line2P30 first_line2Q30%BD3line3P30=1/2*BD3P30;line3Q30=1/2*(BD3Q30-BD3QC_1);BYA3_P30=line3P30+BD3_dedaPT;BYA3_Q30=line3Q30+BD3_dedaQT;BYA3_S=sqrt(BYA3_P30)2+(BYA3_Q30)2);BYA3_I30=BYA3_S/(sqrt(3)*10);line3P30_line3Q30_BYA3_P30_BYA3_Q30=line3P30 line3Q30 BYA3_P30 BYA3_Q30Jec3=0.9;%常数选择Aec3=
20、BYA3_I30/Jec3;%选LJ_35LJ3_Iai=135;LJ3_r0=1.33;LJ3_x0=0.35;theta3=29;L3=0.64;%常数选择LJ3_K=sqrt(70-theta3)/(70-25);LJ3_IIai=LJ3_K*LJ3_Iai; %BYA3_I30RL3=1.33*L3;XL3=0.35*L3;line3_dedaPL3=3*(BYA3_I30)2*RL3/1000;line3_dedaQL3=3*(BYA3_I30)2*XL3/1000;first_line3P30=BYA3_P30+line3_dedaPL3;first_line3Q30=BYA3_Q
21、30+line3_dedaQL3;line3deda_U3=(first_line3P30*LJ3_r0+first_line3Q30*LJ3_x0)/10*L3/1000;line3deda_U3_baifen=line3deda_U3/10*100;line3_dedaPL3_dedaQL3_firstline3P30_firstline3Q30_U3baifen=line3_dedaPL3 line3_dedaQL3 first_line3P30 first_line3Q30 line3deda_U3_baifen%4.2联络线 10kvlianluo_P30=FP_Psum*0.3;l
22、ianluo_Q30=FP_Qsum*0.3;lianluo_S=sqrt(lianluo_P30)2+(lianluo_Q30)2);lianluo_I=lianluo_S/(sqrt(3)*10);lianluo_Jec=0.9;%常数选择lianluo_Aec=lianluo_I/lianluo_Jec;lianluo_r0=1.33;lianluo_x0=0.35;theta4=29;lianluo_Iai=135;L4=5;%常数选择lianluo_K=sqrt(70-theta4)/(70-25);lianluo_IIai=lianluo_K*lianluo_Iai;RL4=1.3
23、3*L4;XL4=0.35*L4;lianluo_dedaPL4=3*(lianluo_I)2*RL4;lianluo_dedaQL4=3*(lianluo_I)2*XL4;first_lianluoP30=lianluo_P30+lianluo_dedaPL4;first_lianluoQ30=lianluo_Q30+lianluo_dedaQL4;lianluodeda_U4=(lianluo_P30*lianluo_r0+lianluo_Q30*lianluo_x0)/(10)*L4/1000;lianluodeda_U4_baifen=lianluodeda_U4/10*100;%4.
24、3 35kv线路选择Line35kv_P=1/2*all_P;Line35kv_Q=1/2*(all_Q-BD4QC_1);Line35kv_S=sqrt(Line35kv_P)2+(Line35kv_Q)2);Line35kv_dedaP=0.015*Line35kv_S;Line35kv_dedaQ=0.06*Line35kv_S;Line35kv_P2=Line35kv_P+Line35kv_dedaP;Line35kv_Q2=Line35kv_Q+Line35kv_dedaQ;Line35kv_S2=sqrt(Line35kv_P2)2+(Line35kv_Q2)2);Line35kv
25、_I=Line35kv_S2/(sqrt(3)*35);Line35kv_Jec=0.9;Line35kv_Aec=Line35kv_I/Line35kv_Jec;%常数选择Line35kv_r0=0.91;Line35kv_x0=0.433;Line35kv_theta=29;Line35kv_Iai=170;Line35kv_L=19;Line35kv_K=sqrt(70-Line35kv_theta)/(70-25);Line35kv_IIai=Line35kv_K*Line35kv_Iai; Line35kv_RL=Line35kv_r0*Line35kv_L;Line35kv_XL=
26、Line35kv_x0*Line35kv_L;Line35kv_dedaPL=3*(Line35kv_I)2*Line35kv_RL/1000;Line35kv_dedaQL=3*(Line35kv_I)2*Line35kv_XL/1000;first_Line35kvP30=Line35kv_P2+Line35kv_dedaPL;first_Line35kvQ30=Line35kv_Q2+Line35kv_dedaQL;Line35kvdeda_U=(first_Line35kvP30*Line35kv_r0+first_Line35kvQ30*Line35kv_x0)/35*Line35k
27、v_L/1000;Line35kvdeda_U_baifen=Line35kvdeda_U/35*100;%5 短路电流计算jiangya35kv_Sd=100;jiangya35kv_Uav=37;jiangya35kv_Soc=1500;jiangya35kv_Id=jiangya35kv_Sd/(sqrt(3)*jiangya35kv_Uav);jy35_X1=jiangya35kv_Sd/jiangya35kv_Soc;xian0_x=0.433;xian0_L=19;jy35_X2=xian0_x*xian0_L*jiangya35kv_Sd/(jiangya35kv_Uav)2;j
28、y35_X3=BD4_Uk/100*jiangya35kv_Sd/2;jy35_X4=BD3_Uk/100*jiangya35kv_Sd/0.8;jy35_Xall=jy35_X1+1/2*jy35_X2;jy35_Ik3=jiangya35kv_Id/jy35_Xall;jy35_ish3=2.55*jy35_Ik3;jy35_Ish3=1.51*jy35_Ik3;jy35_Sk3=jiangya35kv_Sd/jy35_Xall;jy35_Id_X1_X2_Xall_Ik3_ish3_Ish3_Sk3=jiangya35kv_Id jy35_X1 jy35_X2 jy35_Xall jy3
29、5_Ik3 jy35_ish3 jy35_Ish3 jy35_Sk3mulixan10kv_Sd=100;muxian10kv_Uav=10.5;muxian10kv_Id=mulixan10kv_Sd/(sqrt(3)*muxian10kv_Uav);muxian10kv_Soc=1500;mx_xian0_x=0.433;mx_xian0_L=19;mx10_Xall=jy35_X1+1/2*jy35_X2+1/2*jy35_X3;mx10_Ik3=muxian10kv_Id/mx10_Xall;mx10_ish3=2.55*mx10_Ik3;mx10_Ish3=1.51*mx10_Ik3
30、;mx10_Sk3=mulixan10kv_Sd/mx10_Xall;mx10_Id_Xall_Ik3_ish3_Ish3_Sk3=muxian10kv_Id mx10_Xall mx10_Ik3 mx10_ish3 mx10_Ish3 mx10_Sk3mulixan04kv_Sd=100;muxian04kv_Uav=0.4;mx_xian04_x=0.433;mx_xian04_L=19;muxian04kv_Id=mulixan04kv_Sd/(sqrt(3)*muxian04kv_Uav);muxian04kv_Soc=1500;mx04_Xall=jy35_X1+1/2*jy35_X2+1/2*jy35_X3+1/2*jy35_X4;mx04_Ik3=muxian04kv_Id/mx04_Xall;mx04_ish3=2.55*mx04_Ik3;mx04_Ish3=1.51*mx04_Ik3;mx04_Sk3=mulixan04kv_Sd/mx04_Xall;mx04_Id_Xall_Ik3_ish3_Ish3_Sk3=muxian04kv_Id mx04_Xall mx04_Ik3 mx04_ish3 mx04_Ish3 mx04_Sk3 专心-专注-专业