 án tt nghip k  Trang 1 Ngành  L   :1 ô=10km     1.      Ð  án tt nghip k  Trang 2 Ngành  L   1.2.2  1: S    3  40  10,5 10,5 Cos  0,85    P  = 40M cos  = 0,8. U     40=120 MW. -90%)P  .  %P  P kt = 90%P   P kt = 90 3 40 108 100 MW     %P  P kt = 90 2 40 72 100 MW      : P F = 2 40 80MW    án tt nghip k  Trang 3 Ngành  L 1.2.3   2: S Pt1 Pt2 Pt3 Pt4 Pt5 Pt6 Pt7 Pt8 P max MW 30 25 35 32 38 30 30 38 cos  0.88  KT KT KT KT KT KT KT KT   - - P min = 50%P max - T max = 5000h -  -      T max kV.  : G  . max max max S P jQ MVA S max MVA . min min min S P jQ MVA S min MVA 1 30+j16,2 34,09 15+j8,1 17,05 2 25+j13,5 28,41 12,5+j6,75 14,21 3 35+j18,9 39,78 17,5+j9,45 19,89 4 32+j17,28 36,37 16+j8,64 18,19 5 38+j20,52 43,19 19+j10,26 21,59 6 30+j16,2 34,09 15+j8,1 17,05 7 30+j16,2 34,09 15+j8,1 17,05 8 38+j20,52 43,19 19+j10,26 21,59  258+j139,32 129+j69,66  án tt nghip k  Trang 4 Ngành  L 1.3       U  = 4,34 16.P kV (1)  -i , km; P - công , MW;   160   = 110 kV V 8: U 8 = 4.34 50 16.38 = 111,33 kV Ð  án tt nghip k  Trang 5 Ngành  L    P,MW  dây ,km      ,kV HT-1 30 50 99,91 110 HT-2 25 72,1 94.3 HT-3 35 58,3 82,3 HT-4 32 44,7 102,4 HT-6 30 80,6 102,76 -5 38 50 111,33 -7 30 60,8 100,93 -8 38 50 111,33   = 110 kV . 1.4               án tt nghip k  Trang 6 Ngành  L  P  + P HT = P tt = m max PP  +P td +P dt (2)  P  -; P HT ; ; max P  -; P  - P  =5% max P  P td  ; P dt  dt =10% max P     dt =0; P tt ;  max P  =P 1 +P 2 +P 3 +P 4 +P 5 +P 6 +P 7 +P 8 =30+25+35+32+38+30+30+38=258 MW  P  = 5% max P  = 0.05 258 =12,9 MW  án tt nghip k  Trang 7 Ngành  L g troP td =8% P  = 0,08 120 9,6MW  P tt = max P  + P  = 258+12,9 + 0 + 9,6 = 280,5 MW TP kt =P  =108 MW  P HT = P tt - P  =280,5  108 = 172,5 MW 1.5        Q F + Q HT = Q tt = m max Lc Q Q Q      + b Q  + Q td + Q dt (3)  Q F - Q HT  max Q  - L Q  -  c Q  -  L Q  = c Q  ;  án tt nghip k  Trang 8 Ngành  L b Q  -  b Q  = 15% max Q  ; Q td - Q dt    dt  dt = 0  Q F = P F tg F  = 108  0,62 = 66,96 MVAr  max Q  = Q 1 + Q 2  8 = 16,2 + 13,5 + 18,9 + 17,28 + 20,52 + 20,52 +16,2 + 16,2 + 20,52 = 139,32 MVAr.  b Q  = 0,15  139,32 = 20,9 MVAr  Q td = P td . td tg  = P td  tg( arccos td  )= 9,6  0,75 = 7,2 MVAr  td   td    td  = 0,7  0, td  = 0,8 suy ra tg td  = 0,75.  Q tt = 139,32 + 20,9 + 7,2 = 167,42 MVAr Q HT = Q tt  Q F = 167,42  66,96 = 100,46 MVAr.    án tt nghip k  Trang 9 Ngành  L     -  P F = 90%  120 = 108 MW   td = 8%  108 = 8,64 MW  N = 108  8,64 = 99,36 MW  P H = P tt  P N = 280,5  99,36 = 181,14 MW   P ttmin = 50% P ttmax = 50%  280,5 = 140,25 MW.    P F = 90%  80 = 72 MW   P td = 8% . 72 = 5,76 MW  N = 72  5,76 = 66,24 MW  án tt nghip k  Trang 10 Ngành  L  P H = 140,25  66,24 = 74,01 MW    công sP F = 2  40 = 80 MW  P td = 8%  80 = 6,4 MW  N = 80  6,4 = 73,6 MW  P H = 280,5  73,6 = 206,9 MW   P F , MW %P  P td , MW P N , MW P H , MW  108 90 8,64 99,36 181,14  72 90 5,76 66,24 74,01  80 100 6,4 73,6 206,9     -  -  [...].. .Đồ án tốt nghiệp kỹ sư Trang 11 Ngành ỹ ệ – - Ð Lớp 51 Đ ệ Đồ án tốt nghiệp kỹ sư Trang 12 Ngành ỹ ệ – Ð Ð Lớp 51 Đ ệ Đồ án tốt nghiệp kỹ sư Trang 13 Ngành ỹ ệ – Ð Ð Lớp 51 Đ ệ Đồ án tốt nghiệp kỹ sư Trang 14 Ngành ỹ ệ – ệ - kt A tb Tmax kt = 1,1(A/mm2) – – trang 295 ) Fi  2 Fi – ]; I i max  Iimax – 103 [A] I i max J kt maxi - A; – U – ; Lớp 51 Đ Smax i n  3U đm Đồ án tốt nghiệp kỹ... U max bt  15%  20% U max sc  20%  25% U max bt , U max sc U i (%)  Pi Ri  Qi X i 100% 2 U đm Lớp 51 Đ Đồ án tốt nghiệp kỹ sư Trang 16 Ngành ỹ ệ – ệ W Pi, Qi MVAr) ) Ri, Xi Ð -3 – P -3 = Pkt – Ptd – PN - PN Pkt – W; Ptd – W; PN – N = P5 + P7 + P8 = 106 MW); Lớp 51 Đ Đồ án tốt nghiệp kỹ sư Trang 17 Ngành ỹ ệ – PN - W; kt = 108 MW; Ptd = 8,64 MW; PN = 5%PN = 0,05  106 = 5,3 MW; – -3... 35,61 32,38 70 265 71,23 90,6 0,46 0,44 2,58 2,34 20,84 19,93 3- Lớp 51 Đ Đồ án tốt nghiệp kỹ sư Trang 23 Ngành ỹ ệ – ệ Ð -2 a) S 12  S2  25  j13,5MVA  Smax12  28, 41MVA I max12  Fkt  Smax12 n  3  U đm 103  28, 41 103  74,56 A 2  3 110 I max12 74,56   67, 78mm2 J kt 1,1 2 A Icp A - - trang 258) Lớp 51 Đ Đồ án tốt nghiệp kỹ sư Trang 24 Ngành kt ỹ ệ – ệ = 70mm2 - Isc = 2.Ibtmax =... 12,89% Lớp 51 Đ Đồ án tốt nghiệp kỹ sư Trang 26 Ngành ỹ R,  X,  U bt ,% U sc ,% HT - 1 5,25 10,50 4,96 12,89 1-2 9,48 9,06 2,97 5,94 HT - 3 7,87 12,33 5,64 14,32 HT - 4 7,38 9,59 3,32 6,64 HT - 6 13,30 17,29 5,61 11,22 -5 4,25 10,35 5,53 14,05 7,08 9,20 2,99 5,97 8,25 10,73 4,41 8,82 20,84 19,93 3,12 ệ – 9,8 5-7 -8 3- Ubt max %  5,64% < 10% U sc max %  14,32% < 20 % Lớp 51 Đ ệ Đồ án tốt nghiệp... 3,38 70 265 71,23 90,6 0,46 0,44 2,58 2,34 20,84 19,93 5-7 -8 3- Lớp 51 Đ Đồ án tốt nghiệp kỹ sư Trang 28 Ngành ỹ ệ – ệ Ð -2 a) S 32  S2  25  j13,5MVA  Smax32  28, 41MVA I max 32  Fkt  Smax 32 n  3  U đm 103  28, 41 103  74,56 A 2  3 110 I max 32 74,56   67, 78mm2 J kt 1,1 2 A Icp A - - trang 258) Lớp 51 Đ Đồ án tốt nghiệp kỹ sư Trang 29 Ngành kt ỹ ệ – ệ = 70mm2 - Isc = 2.Ibtmax... 71,23 90,6 0,46 0,44 2,58 2,34 20,84 19,93 5-7 -8 3- 32,38 Lớp 51 Đ Đồ án tốt nghiệp kỹ sư Trang 33 Ngành ỹ ệ – ệ Ð –6 a) S 46  S6  30  j16, 2MVA  Smax 46  34, 09MVA I max 46  Fkt  Smax 46 n  3  U đm 103  34, 09 103  89, 48 A 2  3 110 I max 46 89, 46   81,34mm2 J kt 1,1 2 A -95 Icp A - - trang 258) Lớp 51 Đ Đồ án tốt nghiệp kỹ sư Trang 34 Ngành kt ỹ ệ – ệ = 95mm2 ki - Isc = 2.Ibtmax... 3,32 6,64 HT - 6 13,30 17,29 5,61 11,22 -5 8,25 10,73 4,41 8,82 -7 10,03 13,04 4,23 8,47 -8 8,25 10,73 4,41 8,82 20,84 19,93 3,12 9,8 3- Ubt max %  5,64% < 10%; U sc max %  14,32% < 20 % ( Lớp 51 Đ Đồ án tốt nghiệp kỹ sư Trang 22 Ngành ỹ ệ – ệ : Ti ro, Ftc, dây P,MW Q,MVAr xo, bo.10-6 B/2.10-4 Ikt,A Fkt,mm2 mm2 Icp,A Isc,A L, m  /km  /km ,S/km ,S R,  X,  HT - 1 30 16,2 89,48 81,34 95 330 178,95... 6,45 MVAr = 13,57 MVA a) Imax 3- Fkt = = Smax 3 NĐ n  3U đm 103  13,57 103 = 35,61 A 2  3.110 I max 3 NĐ 35, 61 = 32,37 A  J kt 1,1 2 A Icp A - - trang 258 ) Ftc = 70mm2 = 70mm2 – - ệ – Lớp 51 Đ Đồ án tốt nghiệp kỹ sư Isc = 2  Imax3- Trang 18 = 2  35,61 = 71,22 A Ngành sc ỹ ệ – ệ < Icp PF = 2  40 = 80 MW Ptd = 0,08  80 = 6,4 MW P -3 = PF – Ptd – PN -  PN – – – W - W Suy ra P3- Q3- = P3- =... j13,5)  55  j 29,7 MVA  Smax  62,5 MVA I max HT 1  Fkt  Smax HT 1 n  3 110 103  62,5 103  164, 04 A 2  3 110 I max HT 1 164, 02   149,13mm2 J kt 1,1 2 A Icp A - - trang 258) Lớp 51 Đ Đồ án tốt nghiệp kỹ sư Trang 25 Ngành kt ỹ ệ – ệ = 150mm2 > 70mm2 - Isc = 2.Ibtmax = 2  164,04 = 328,08 A < Icp A 2;3;4 o= A 0,21  /km , xo = 0,42  /km ; b0 = 2,74.10-6 - - trang 258) 1 1 R   ro ... A 2  3 110 < Icp b) A - o= 0,46  /km , xo = 0,44  / 0 = 2,58.10-6 - - trang 258) 1 1 R   ro  l   0, 46  90, 6  20,84 / km n 2 1 1 X   xo  l   0, 44  90, 6  19,93 / km n 2 Lớp 51 Đ Đồ án tốt nghiệp kỹ sư Trang 19 Ngành ỹ ệ – B 1  nb0l  0,5  2  2,58  90, 6  2,3.104 S 2 2 U 3bt  P.R  Q X 11,94  20,84  6, 45 19,93 100  100  3,12% 2 U đm 1102 U3 NĐsc %  2  U3 NĐbt .  Ð  án tt nghip k  Trang 12 Ngành  L   Ð Ð  án tt nghip k  Trang.      Ð  án tt nghip k  Trang 2 Ngành  L. 80MW    án tt nghip k  Trang 3 Ngành  L