Chương III: TÍNH TOÁN PHÂN BỐ CÔNG SUẤT LƯỚI ĐIỆN
8. Thông số và phương thức kết dây TBA 110kV Việt Trì (E4.1) 83
3.2 GIẢI TÍCH LƯỚI 110 KV VĨNH PHÚC 84
3.2.2 Áp dụng thuật toán Newton-Raphson giải tích lưới 110 kV Vĩnh Phúc
Từ sơ đồ thay thế như trên hình 3.1, thuật toán Newton-Raphson áp dụng đối với mô hình nút V và PQ được viết theo các bước sau:
tclc; clear;
%nhap thong so duong day, thong so nut vao day
%thong so cua 1km duong day 110kV zo185=0.160+0.396i; bo185=2.87e-6i;
zo240=0.122+0.391i; bo240=2.92e-6i;
zo300=0.100+0.379i; bo300=3.01e-6i;
zo400=0.073+0.370i; bo400=3.08e-6i;
%chieu dai cac tuyen duong day km
L14=10.5; L45=7; L56=6.8; L26=11; L27=5.5; L28=9;
L89=14; L910=5.64; L310=4.8; L111=10;
%duong day don k1, kep k2 k1=1;
k2=2;
%thong so cac tuyen duong day don va song song z14=zo240*L14/k1; b14=bo240*L14/k1;
z45=zo240*L45/k1; b45=bo240*L45/k1;
z56=zo240*L56/k1; b56=bo240*L56/k1;
z26=zo240*L26/k1; b26=bo240*L26/k1;
z27=zo240*L27/k2; b27=bo240*L27*;
z28=zo240*L28/k1; b28=bo240*L28/k1;
Người thực hiện: Phạm Văn Ngọc 89 z89=zo240*L89/k1; b89=bo240*L89/k1;
z910=zo240*L910/k1; b910=bo240*L910/k1;
z310=zo240*L310/k1; b310=bo240*L310/k1;
z111=zo240*L111/k1; b111=bo240*L111/k1;
%tong dan nut (bus) và tong dan cac tuyen duong day y11=1/z111+1/z14+(b111/2+b14/2);y111=1/z111;y14=1/z14;
y22=1/z26+1/z27+1/z28+(b26/2+b27/2+b28/2);y26=1/z26;y27=1/z27;y28=1/z28;
y33=1/z310+(b310/2);y310=1/z310;
y41=y14;y44=1/z14+1/z45+(b14/2+b45/2);y45=1/z45;
y54=y45;y55=1/z45+1/z56+(b45/2+b56/2);y56=1/z56;
y62=y26;y65=y56;y66=1/z56+1/z26+(b56+b26)/2;y72=y27;y77=1/z27+b27/2;
y82=y28;y89=1/z89;y88=1/z28+1/z89+(b28+b89)/2;
y98=y89;y910=1/z910;y99=1/z89+1/z910+(b89+b910)/2;
y109=y910;y103=y310;y1010=1/z910+1/z310+(b910+b310)/2;
y111=1/z111;y1111=1/z111+b111/2;
%cac goc anphal
a11=1.57+angle(y11);a14=1.57+angle(y14);a111=1.57+angle(y111);
a22=1.57+angle(y22);a26=1.57+angle(y26);a27=1.57+angle(y27);a28=1.57+angl e(y28);
a33=1.57+angle(y33);a310=1.57+angle(y310);
a41=a14;a44=1.57+angle(y44);a45=1.57+angle(y45);
a54=a45;a55=1.57+angle(y55);a56=1.57+angle(y56);
a62=a26;a65=a56;a66=1.57+angle(y66);a72=a27;a77=1.57+angle(y77);
a82=a28;a89=1.57+angle(y89);a88=1.57+angle(y88);
a98=a89;a910=1.57+angle(y910);a99=1.57+angle(y99);
a109=a910;a103=a310;a1010=1.57+angle(y1010);a1111=1.57+angle(y1111);
%khai bao thong so tai
%cot va sin
cs=0.85; sn=0.527;
T4=120;
T5=80;
T6=63;
T7=126;
T8=25;
T9=126;
T10=63;
T11=50;
%he so mang tai kt=1;
%cong suat cac TBA tai cac nut tinh qua he so p4=kt*cs*T4; q4=kt*sn*T4;
p5=kt*cs*T5; q5=kt*sn*T5;
p6=kt*cs*T6; q6=kt*sn*T6;
p7=kt*cs*T7; q7=kt*sn*T7;
p8=kt*cs*T8; q8=kt*sn*T8;
p9=kt*cs*T9; q9=kt*sn*T9;
p10=kt*cs*T10; q10=kt*sn*T10;
p11=kt*cs*T11; q11=kt*sn*T11;
%dien ap nguon
u1=110; u2=115; u3=110;
%nhap du kien ban dau
u4=110; u5=110; u6=110; u7=110; u8=110; u9=110; u10=110; u11=110;
d1=0.06; d2=0; d3=0.07;
d4=0; d5=0; d6=0; d7=0; d8=0;d9=0; d10=0; d11=0;
X=[u4;u5;u6;u7;u8;u9;u10;u11;d4;d5;d6;d7;d8;d9;d10;d11];
esp=0.001;
N=0;
dk=1;
while (dk==1)
%He phuong trinh ban dau
Người thực hiện: Phạm Văn Ngọc 90 dp4=u4^2*abs(y44)*sin(a44)+u4*u1*abs(y41)*sin(d4-d1-
a41)+u4*u5*abs(y45)*sin(d4-d5-a45)+p4;
dq4=u4^2*abs(y44)*cos(a44)-u4*u1*abs(y41)*cos(d4-d1-a41)- u4*u5*abs(y45)*cos(d4-d5-a45)+q4;
dp5=u5^2*abs(y55)*sin(a55)+u5*u4*abs(y54)*sin(d5-d4- a54)+u5*u6*abs(y56)*sin(d5-d6-a56)+p5;
dq5=u5^2*abs(y55)*cos(a55)-u5*u4*abs(y54)*cos(d5-d4-a54)- u5*u6*abs(y56)*cos(d5-d6-a56)+q5;
dp6=u6^2*abs(y66)*sin(a66)+u6*u5*abs(y65)*sin(d6-d5- a65)+u6*u2*abs(y62)*sin(d6-d2-a62)+p6;
dq6=u6^2*abs(y66)*cos(a66)-u6*u5*abs(y65)*cos(d6-d5-a65)- u6*u2*abs(y62)*cos(d6-d2-a62)+q6;
dp7=u7^2*abs(y77)*sin(a77)+u7*u2*abs(y72)*sin(d7-d2-a72)+p7;
dq7=u7^2*abs(y77)*cos(a77)-u7*u2*abs(y72)*cos(d7-d2-a72)+q7;
dp8=u8^2*abs(y88)*sin(a88)+u8*u2*abs(y82)*sin(d8-d2- a82)+u8*u9*abs(y89)*sin(d8-d9-a89)+p8;
dq8=u8^2*abs(y88)*cos(a88)-u8*u2*abs(y82)*cos(d8-d2-a82)- u8*u9*abs(y89)*cos(d8-d9-a89)+q8;
dp9=u9^2*abs(y99)*sin(a99)+u9*u8*abs(y98)*sin(d9-d8- a98)+u9*u10*abs(y910)*sin(d9-d10-a910)+p9;
dq9=u9^2*abs(y99)*cos(a99)-u9*u8*abs(y98)*cos(d9-d8-a98)- u9*u10*abs(y910)*cos(d9-d10-a910)+q9;
dp10=u10^2*abs(y1010)*sin(a1010)+u10*u9*abs(y109)*sin(d10-d9- a109)+u10*u3*abs(y103)*sin(d10-d3-a103)+p10;
dq10=u10^2*abs(y1010)*cos(a1010)-u10*u9*abs(y109)*cos(d10-d9-a109)- u10*u3*abs(y103)*cos(d10-d3-a103)+q10;
dp11=u11^2*abs(y1111)*sin(a1111)+u11*u1*abs(y111)*sin(d11-d1- a111)+p11;
dq11=u11^2*abs(y1111)*cos(a1111)-u11*u1*abs(y111)*cos(d11-d1- a111)+q11;
F=[dp4;dp5;dp6;dp7;dp8;dp9;dp10;dp11;dq4;dq5;dq6;dq7;dq8;dq9;dq10;dq11];
%ma tran j1
j11=2*u4*abs(y44)*sin(a44)+u1*abs(y41)*sin(d4-d1-a41)+u5*abs(y45)*sin(d4- d5-a45);
j12=u4*abs(y45)*sin(d4-d5-a45);j13=0;j14=0;j15=0;j16=0;j17=0;j18=0;
j21=u5*abs(y54)*sin(d5-d4-a54);j22=2*u5*abs(y55)*sin(a55)- u4*abs(y54)*sin(-d5+d4+a54)+u6*abs(y56)*sin(d5-d6-a56);
j23=u5*abs(y56)*sin(d5-d6-a56);j24=0;j25=0;j26=0;j27=0;j27=0;j28=0;
j31=0;j32=-u6*abs(y65)*sin(-d6+d5+a65);j33=2*u6*abs(y66)*sin(a66)- u5*abs(y65)*sin(-d6+d5+a65)-u2*abs(y62)*sin(-d6+d2+a62);
j34=0;j35=0;j36=0;j37=0;j38=0;
j41=0;j42=0;j43=0;j44=2*u7*abs(y77)*sin(a77)-u2*abs(y72)*sin(- d7+d2+a72);j45=0;j46=0;j47=0;j48=0;
j51=0;j52=0;j53=0;j54=0;j55=2*u8*abs(y88)*sin(a88)-u2*abs(y82)*sin(- d8+d2+a82)+u9*abs(y89)*sin(d8-d9-a89);
j56=u8*abs(y89)*sin(d8-d9-a89);j57=0;j58=0;
j61=0;j62=0;j63=0;j64=0;j65=-u9*abs(y98)*sin(-
d9+d8+a98);j66=2*u9*abs(y99)*sin(a99)-u8*abs(y98)*sin(- d9+d8+a98)+u10*abs(y910)*sin(d9-d10-a910);
j67=u9*abs(y910)*sin(d9-d10-a910);j68=0;
j71=0;j72=0;j73=0;j74=0;j75=0;j76=-u10*abs(y109)*sin(-
d10+d9+a109);j77=2*u10*abs(y1010)*sin(a1010)-u9*abs(y109)*sin(- d10+d9+a109)+u3*abs(y103)*sin(d10-d3-a103);
j78=0;j81=0;j82=0;j83=0;j84=0;j85=0;j86=0;j87=0;j88=2*u11*abs(y1111)*sin(
a1111)-u1*abs(y111)*sin(-d11+d1+a111);
J1=[j11 j12 j13 j14 j15 j16 j17 j18;j21 j22 j23 j24 j25 j26 j27 j28;j31 j32 j33 j34 j35 j36 j37 j38;j41 j42 j43 j44 j45 j46 j47 j48;j51 j52 j53 j54 j55 j56 j57 j58;j61 j62 j63 j64 j65 j66 j67 j68;j71 j72 j73 j74 j75 j76 j77 j78;j81 j82 j83 j84 j85 j86 j87 j88];
%ma tran J2
Người thực hiện: Phạm Văn Ngọc 91 j11=u4*u1*abs(y41)*cos(-d4+d1+a41)+u4*u5*abs(y45)*cos(d4-d5-a45);
j12=-u4*u5*abs(y45)*cos(d4-d5-a45);j13=0;j14=0;j15=0;j16=0;j17=0;j18=0;
j21=-u4*u5*abs(y54)*cos(-d5+d4+a54);j22=u4*u5*abs(y54)*cos(- d5+d4+a54)+u5*u6*abs(y56)*cos(d5-d6-a56);
j23=-u5*u6*abs(y56)*cos(d5-d6-a56);j24=0;j25=0;j26=0;j27=0;j28=0;
j31=0;j32=-u5*u6*abs(y65)*cos(-d6+d5+a65);j33=u5*u6*abs(y65)*cos(- d6+d5+a65)+u6*u2*abs(y62)*cos(-d6+d2+a62);
j34=0;j35=0;j36=0;j37=0;j38=0;
j41=0;j42=0;j43=0;j44=u7*u2*abs(y72)*cos(- d7+d2+a72);j45=0;j46=0;j47=0;j48=0;
j51=0;j52=0;j53=0;j54=0;j55=u8*u2*abs(y82)*cos(- d8+d2+a82)+u8*u9*abs(y89)*cos(d8-d9-a89);
j56=-u8*u9*abs(y89)*cos(d8-d9-a89);j57=0;j58=0;
j61=0;j62=0;j63=0;j64=0;j65=-u8*u9*abs(y98)*cos(-
d9+d8+a98);j66=u8*u9*abs(y98)*cos(-d9+d8+a98)+u9*u10*abs(y910)*cos(d9- d10-a910);
j67=-u9*u10*abs(y910)*cos(d9-d10-
a910);j68=0;j71=0;j72=0;j73=0;j74=0;j75=0;j76=-u9*u10*abs(y109)*cos(- d10+d9+a109);
j77=u9*u10*abs(y109)*cos(-d10+d9+a109)+u10*u3*abs(y103)*cos(d10-d3- a103);j78=0;
j81=0;j82=0;j83=0;j84=0;j85=0;j86=0;j87=0;j88=u11*u1*abs(y111)*cos(- d11+d1+a111);
J2=[j11 j12 j13 j14 j15 j16 j17 j18;j21 j22 j23 j24 j25 j26 j27 j28;j31 j32 j33 j34 j35 j36 j37 j38;j41 j42 j43 j44 j45 j46 j47 j48;j51 j52 j53 j54 j55 j56 j57 j58;j61 j62 j63 j64 j65 j66 j67 j68;j71 j72 j73 j74 j75 j76 j77 j78;j81 j82 j83 j84 j85 j86 j87 j88];
%ma tran J3
j11=2*u4*abs(y44)*cos(a44)-u1*abs(y41)*cos(-d4+d1+a41)- u5*abs(y45)*cos(d4-d5-a45);
j12=-u4*abs(y45)*cos(d4-d5-a45);j13=0;j14=0;j15=0;j16=0;j17=0;j18=0;
j21=-u5*abs(y54)*cos(-d5+d4+a54);j22=2*u5*abs(y55)*cos(a55)- u4*abs(y54)*cos(-d5+d4+a54)-u6*abs(y56)*cos(d5-d6-a56);
j23=-u5*abs(y56)*cos(d5-d6-a56);j24=0;j25=0;j26=0;j27=0;j28=0;
j31=0;j32=-u6*abs(y65)*cos(-d6+d5+a65);j33=2*u6*abs(y66)*cos(a66)- u5*abs(y65)*cos(-d6+d5+a65)-u2*abs(y62)*cos(-d6+d2+a62);
j34=0;j35=0;j36=0;j37=0;j38=0;
j41=0;j42=0;j43=0;j44=2*u7*abs(y77)*cos(a77)-u2*abs(y72)*cos(- d7+d2+a72);j45=0;j46=0;j47=0;j48=0;
j51=0;j52=0;j53=0;j54=0;j55=2*u8*abs(y88)*cos(a88)-u2*abs(y82)*cos(- d8+d2+a82)-u9*abs(y89)*cos(d8-d9-a89);
j56=-u8*abs(y89)*cos(d8-d9-a89);j57=0;j58=0;
j61=0;j62=0;j63=0;j64=0;j65=-u9*abs(y98)*cos(-
d9+d8+a98);j66=2*u9*abs(y99)*cos(a99)-u8*abs(y98)*cos(-d9+d8+a98)- u10*abs(y910)*cos(d9-d10-a910);
j67=-u9*abs(y910)*cos(d9-d10-
a910);j68=0;j71=0;j72=0;j73=0;j74=0;j75=0;j76=-u10*abs(y109)*cos(- d10+d9+a109);
j77=2*u10*abs(y1010)*cos(a1010)-u9*abs(y109)*cos(-d10+d9+a109)- u3*abs(y103)*cos(d10-d3-a103);j78=0;
j81=0;j82=0;j83=0;j84=0;j85=0;j86=0;j87=0;j88=2*u11*abs(y1111)*cos(a1111) -u1*abs(y111)*cos(-d11+d1+a111);
J3=[j11 j12 j13 j14 j15 j16 j17 j18;j21 j22 j23 j24 j25 j26 j27 j28;j31 j32 j33 j34 j35 j36 j37 j38;j41 j42 j43 j44 j45 j46 j47 j48;j51 j52 j53 j54 j55 j56 j57 j58;j61 j62 j63 j64 j65 j66 j67 j68;j71 j72 j73 j74 j75 j76 j77 j78;j81 j82 j83 j84 j85 j86 j87 j88];
%ma tran J4
j11=-u4*u1*abs(y41)*sin(-d4+d1+a41)+u4*u5*abs(y45)*sin(d4-d5-a45);j12=- u4*u5*abs(y45)*sin(d4-d5-a45);
j13=0;j14=0;j15=0;j16=0;j17=0;j18=0;
Người thực hiện: Phạm Văn Ngọc 92 j21=u4*u5*abs(y54)*sin(-d5+d4+a54);j22=-u4*u5*abs(y54)*sin(-
d5+d4+a54)+u5*u6*abs(y56)*sin(d5-d6-a56);
j23=-u5*u6*abs(y56)*sin(d5-d6-a56);j24=0;j25=0;j26=0;j27=0;j28=0;
j31=0;j32=u5*u6*abs(y65)*sin(-d6+d5+a65);j33=-u5*u6*abs(y65)*sin(- d6+d5+a65)-u6*u2*abs(y62)*sin(-d6+d2+a62);
j34=0;j35=0;j36=0;j37=0;j38=0;
j41=0;j42=0;j43=0;j44=-u7*u2*abs(y72)*sin(- d7+d2+a72);j45=0;j46=0;j47=0;j48=0;
j51=0;j52-0;j53=0;j54=0;j55=-u8*u2*abs(y82)*sin(- d8+d2+a82)+u8*u9*abs(y89)*sin(d8-d9-a89);
j56=-u8*u9*abs(y89)*sin(d8-d9-a89);j57=0;j58=0;
j61=0;j62=0;j63=0;j64=0;j65=u8*u9*abs(y98)*sin(-d9+d8+a98);j66=- u8*u9*abs(y98)*sin(-d9+d8+a98)+u9*u10*abs(y910)*sin(d9-d10-a910);
j67=-u9*u10*abs(y910)*sin(d9-d10-
a910);j68=0;j71=0;j72=0;j73=0;j74=0;j75=0;j76=u9*u10*abs(y109)*sin(- d10+d9+a109);
j77=-u9*u10*abs(y109)*sin(-d10+d9+a109)+u10*u3*abs(y103)*sin(d10-d3- a103);j78=0;
j81=0;j82=0;j83=0;j84=0;j85=0;j86=0;j87=0;j88=-u11*u1*abs(y111)*sin(- d11+d1+a111);
J4=[j11 j12 j13 j14 j15 j16 j17 j18;j21 j22 j23 j24 j25 j26 j27 j28;j31 j32 j33 j34 j35 j36 j37 j38;j41 j42 j43 j44 j45 j46 j47 j48;j51 j52 j53 j54 j55 j56 j57 j58;j61 j62 j63 j64 j65 j66 j67 j68;j71 j72 j73 j74 j75 j76 j77 j78;j81 j82 j83 j84 j85 j86 j87 j88];
J=[J1 J2;J3 J4];
A=F;
X=X-inv(J)*F;
u4=X(1,1);
u5=X(2,1);
u6=X(3,1);
u7=X(4,1);
u8=X(5,1);
u9=X(6,1);
u10=X(7,1);
u11=X(8,1);
d4=X(9,1);
d5=X(10,1);
d6=X(11,1);
d7=X(12,1);
d8=X(13,1);
d9=X(14,1);
d10=X(15,1);
d11=X(16,1);
X=[u4;u5;u6;u7;u8;u9;u10;u11;d4;d5;d6;d7;d8;d9;d10;d11];
%he phuong trinh ban dau
dp4=u4^2*abs(y44)*sin(a44)+u4*u1*abs(y41)*sin(d4-d1- a41)+u4*u5*abs(y45)*sin(d4-d5-a45)+p4;
dq4=u4^2*abs(y44)*cos(a44)-u4*u1*abs(y41)*cos(d4-d1-a41)- u4*u5*abs(y45)*cos(d4-d5-a45)+q4;
dp5=u5^2*abs(y55)*sin(a55)+u5*u4*abs(y54)*sin(d5-d4- a54)+u5*u6*abs(y56)*sin(d5-d6-a56)+p5;
dq5=u5^2*abs(y55)*cos(a55)-u5*u4*abs(y54)*cos(d5-d4-a54)- u5*u6*abs(y56)*cos(d5-d6-a56)+q5;
dp6=u6^2*abs(y66)*sin(a66)+u6*u5*abs(y65)*sin(d6-d5- a65)+u6*u2*abs(y62)*sin(d6-d2-a62)+p6;
dq6=u6^2*abs(y66)*cos(a66)-u6*u5*abs(y65)*cos(d6-d5-a65)- u6*u2*abs(y62)*cos(d6-d2-a62)+q6;
dp7=u7^2*abs(y77)*sin(a77)+u7*u2*abs(y72)*sin(d7-d2-a72)+p7;
dq7=u7^2*abs(y77)*cos(a77)-u7*u2*abs(y72)*cos(d7-d2-a72)+q7;
dp8=u8^2*abs(y88)*sin(a88)+u8*u2*abs(y82)*sin(d8-d2- a82)+u8*u9*abs(y89)*sin(d8-d9-a89)+p8;
Người thực hiện: Phạm Văn Ngọc 93 dq8=u8^2*abs(y88)*cos(a88)-u8*u2*abs(y82)*cos(d8-d2-a82)-
u8*u9*abs(y89)*cos(d8-d9-a89)+q8;
dp9=u9^2*abs(y99)*sin(a99)+u9*u8*abs(y98)*sin(d9-d8- a98)+u9*u10*abs(y910)*sin(d9-d10-a910)+p9;
dq9=u9^2*abs(y99)*cos(a99)-u9*u8*abs(y98)*cos(d9-d8-a98)- u9*u10*abs(y910)*cos(d9-d10-a910)+q9;
dp10=u10^2*abs(y1010)*sin(a1010)+u10*u9*abs(y109)*sin(d10-d9- a109)+u10*u3*abs(y103)*sin(d10-d3-a103)+p10;
dq10=u10^2*abs(y1010)*cos(a1010)-u10*u9*abs(y109)*cos(d10-d9-a109)- u10*u3*abs(y103)*cos(d10-d3-a103)+q10;
dp11=u11^2*abs(y1111)*sin(a1111)+u11*u1*abs(y111)*sin(d11-d1- a111)+p11;
dq11=u11^2*abs(y1111)*cos(a1111)-u11*u1*abs(y111)*cos(d11-d1- a111)+q11;
F=[dp4;dp5;dp6;dp7;dp8;dp9;dp10;dp11;dq4;dq5;dq6;dq7;dq8;dq9;dq10;dq11];
B=F;
C=abs(A-B);
N=N+1;
if max(C)<esp dk=2;
end if N==10 dk=2;
end end C X
U1=u1*exp(i*d1)%gia tri dien ap phuc U2=u2*exp(i*d2)
U3=u3*exp(i*d3) U4=u4*exp(i*d4) U5=u5*exp(i*d5) U6=u6*exp(i*d6) U7=u7*exp(i*d7) U8=u8*exp(i*d8) U9=u9*exp(i*d9) U10=u10*exp(i*d10) U11=u11*exp(i*d11)
I14=(U1-U4)*y14*1/sqrt(3)%Dong dien tren nhanh 14 I45=(U4-U5)*y45*1/sqrt(3)
I65=(U6-U5)*y65*1/sqrt(3) I26=(U2-U6)*y26*1/sqrt(3) I27=(U2-U7)*y27*1/sqrt(3) I28=(U2-U8)*y28*1/sqrt(3) I89=(U8-U9)*y89*1/sqrt(3) I109=(U10-U9)*y910*1/sqrt(3) I310=(U3-U10)*y310*1/sqrt(3) I111=(U1-U11)*y111*1/sqrt(3)
Sd14=sqrt(3)*U1*conj(I14)%Cong suat dau duong day 12 Sc14=sqrt(3)*U4*conj(I14)%Cong suat cuoi duong day 12 Sd45=sqrt(3)*U4*conj(I45)
Sc45=sqrt(3)*U5*conj(I45) Sd65=sqrt(3)*U6*conj(I65) Sc65=sqrt(3)*U5*conj(I65) Sd26=sqrt(3)*U2*conj(I26) Sc26=sqrt(3)*U6*conj(I26) Sd27=sqrt(3)*U2*conj(I27) Sc27=sqrt(3)*U7*conj(I27) Sd28=sqrt(3)*U2*conj(I28) Sc28=sqrt(3)*U8*conj(I28)
Người thực hiện: Phạm Văn Ngọc 94 Sd89=sqrt(3)*U8*conj(I89)
Sc89=sqrt(3)*U9*conj(I89) Sd109=sqrt(3)*U10*conj(I109) Sc109=sqrt(3)*U9*conj(I109) Sd310=sqrt(3)*U3*conj(I310) Sc310=sqrt(3)*U10*conj(I310) Sd111=sqrt(3)*U1*conj(I111) Sc111=sqrt(3)*U11*conj(I111)
S14=Sd14-Sc14%Ton that cong suat tren doan 14 S45=Sd45-Sc45
S65=Sd65-Sc65 S26=Sd26-Sc26 S27=Sd27-Sc27 S28=Sd28-Sc28 S89=Sd89-Sc89 S109=Sd109-Sc109 S310=Sd310-Sc310 S111=Sd111-Sc111
Phân tích một số chế độ vận hành và đề xuất giải pháp nếu có: