Buicescu Lucian MS912321-Proiect IGD

8/10/2019 Buicescu Lucian MS912321-Proiect IGD

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UniversitateaPolitehnica dinBucuresti

FacultateadeEnergetica

Proiect-Impactul generarii distribuite asupra retelelo relectrice

Student:

Buicescu Lucian

MS9

2014


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2

Proiect-Impactulgenerariidistribuiteasupraretelelorelectrice

Se considera reteaua electrica de distributie din figura1, care alimenteaza o zona de consum.

Figura.1Schema retelei electrice de distributie


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Parametrii transformatoarelor din ST sunt prezentati in tabelul1,iar parametrii liniilor in

tabelul2.In tabelul3 sunt prezentate puterile maxime cerute de consumatori.

Tabelul1Parametrii transformatoarelor

Sn UnIT/Un

MT Psc P0 usc i0

[MVA] [kV/kV] [kW] [kW] [%] [%]

16 (110 9x1,78%)/22 94 18 11 1,5

Tabelul2Parametrii liniilor electrice

Un sn r0 x0 b0 Iadm

[kV] [mm ] [/km] [/km] [S/km] [A]

110 240 0,122 0,386 2,892 475

20 95 0,321 0,334 3,291 315

Tabelul3Caracteristicile consumatorilor din retea

Consumator Tipcons. S[kVA] cos() Amplasare

CI1 Industrial 2100 0,78 C3




CU1 Urban 550 0,90 C7

CU2 Urban 700 0,92 C8

CU3 Urban 300 0,899 C9

CU4 Urban 400

0,90 C1CU5 Urban 250 0,85 C1

CU6 Urban 650 0,87 C2

Nodul de alimentare (SEN)este caracterizat de urmatoarele marimi:

Nivelul tensiunii este egalcu 1.05 Un

Putereadescurtcircuit:2000MVA.

In regim normalde functionare,reteaua electrica de distributie de medie tensiunese exploateaza in

configuratie radiala,prin deconectarea tronsonuluidintre consumatorii C3siC4.


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4

Pentru aceasta retea se urmareste imbunatatirea regimului de functionare,prin aplicarea urmatoarelor masuri:

a) Compensarea puterii reactive,in vederea obtinerii unui factor de putere neutral de 0,92.

Tabelul 4. Puterile si compensarea puterii

P cos phi cos phi n Qc(MW) S(kva) P(kw) Qc(kw) nci nr baterii Bcompens Qnecom QT necomp

CI1 1.64 0.78 0.92 0.41899187 2100 1640 418.9918656 0.87289972 1 480 1312 832

CI2 1.444 0.76 0.92 0.41755108 1900 1440 416.394432 0.8674884 1 480 1235 755

CI3 1.88 0.75 0.92 0.57483547 2500 1880 574.8354744 1.197573905 2 960 1648 688

CI4 1.76 0.8 0.92 0.38895807 2200 1760 388.9580685 0.810329309 1 480 1320 840

Qbc 480 kVAr

ID NAME U(Kv) u(%) Uang(grd) Pload(MW) Qload(MVar) Pgen(MW) Qgen(Mvar) Qshunt(Mvar)

65 IT 115.28 104.8 -0.1 0 0 0 0 0

78 MT 19.378 96.89 -0.1 0 0 0 0 0

82 MT1 19.847 99.24 -0.9 0 0 0 0 0

65 IT 114.605 104.19 -0.3 0 0 0 0 0

78 MT 16.918 84.59 -3.2 0 0 0 0 0

82 MT1 20.004 100.02 -3.8 0 0 0 0 0

52 N52 115.5 105 0 0 0 10.571 8.149 0

155 Nc1 16.868 84.34 -3.5 0.192 0.119 0 0 0

193 NC10 19.289 96.44 -3.9 0.331 0.16 0 0 0

177 Nc2 16.832 84.16 -3.7 0.521 0.294 0 0 0

181 NC3 16.837 84.19 -4 1.509 1.207 0 0 0

185 NC4 16.936 84.68 -4.1 1.328 1.136 0 0 0

189 NC5 17.089 85.44 -4.2 1.73 1.516 0 0 0

209 NC6 17.319 86.59 -4.2 1.619 1.214 0 0 0


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5

b) Stabilirea configuratiei optime a retelei electrice de medie tensiune prin reconfigurare.

Pentru reconfigurarea retelei electrice de medie tensiune se deconecteaza pe rand cate o linie,din apropierea punctului C5, pentru a gasi

configuratia cu pierderi minime.

Tabelul 5 Pierderi de putere pentru reconfigurarea retelei electrice

Cupla deschisa

LC 1-2 Network MW losses = 0.811650

Network Mvar losses = 1.143640















LC 9-10 Network MW losses = 0.638147Network Mvar losses = 0.228587

Se alege pentru a fi deconectata linia LC 5-6 intrucat are pierderile minime.


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6

In continuare se vor prezenta toate rezultatele pentru linia LC 5-6 deconecata:

Iterationdata

Iterations: 4

Mismatch: 0

From To

P

Loss

Q

Loss

P

Imp

Q

Imp

P

Gen

Q

Gen

P

Load

Q

Load Gen. Cost

Qc

Shunt

Ql

Shunt

Q

Comp

Iron

Losses

Area/Zon

e

Area/Zon

e MW MVar MW MVar MW MVar MW MVar

Curr.

Units MVar MVar MVar MW

Network 0.322 0.0158.84

5 4.053 8.845 4.053 8.523 4.038 0 0 0 0 0.043

Area 1 0.322 0.015 0 0 8.845 4.053 8.523 4.038 0 0 0 0 0

Zone 1 0.322 0.015 0 0 8.845 4.053 8.523 4.038 0 0 0 0 0

UnP LossLine

Q LossLine

P LossTransformer

Q LossTransformer

kV MW MVar MW MVar

20 0.245 0.218 0 0

110 0.02 -0.8 0.057 0.596

Overloads

Nodes

(upper) %


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7

MT 114.85

MT1 113.55

Nc1 113.41

NC10 112.59

Nc2 111.97

NC9 111.72

NC8 110.99

NC7 110.62

NC3 110.4

NC6 110.4

ID Node U uAngleU

PLoad

QLoad

PGen

QGen

QShunt

dPL/dPG

dPL/dQG

Description Zone Area Partial

Name kV % MW MVar MW MVar MVar

Network

52 N52 115.5 105 0 0 0 8.845 4.053 0 0 0Zone1

Area1 1

78 MT 22.97114.8

5 -0.1 0 0 0 0 0 0 0Zone1

Area1 1

65 IT114.95

4 104.5 -0.3 0 0 0 0 0 0 0Zone1

Area1 1

82 MT1 22.71113.5

5 -1.5 0 0 0 0 0 0 0Zone1

Area1 1

15

5 Nc1 22.682

113.4

1 -0.4 0.192 0.119 0 0 0 0 0

Zone

1

Area

1 1

189 NC5 21.91

109.55 -1.2 1.73 0.633 0 0 0 0 0

Zone1

Area1 1

185 NC4 21.962

109.81 -1.1 1.328 0.695 0 0 0 0 0

Zone1

Area1 1

181 NC3 22.079 110.4 -1 1.509 0.765 0 0 0 0 0

Zone1

Area1 1

177 Nc2 22.395

111.97 -0.7 0.521 0.294 0 0 0 0 0

Zone1

Area1 1

205 NC7 22.123

110.62 -2 0.455 0.221 0 0 0 0 0

Zone1

Area1 1

20 NC8 22.198 110.9 -2 0.592 0.252 0 0 0 0 0 Zone Area 1


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8

1 9 1 1

197 NC9 22.344

111.72 -1.8 0.246 0.126 0 0 0 0 0

Zone1

Area1 1

193

NC10 22.517

112.59 -1.6 0.331 0.16 0 0 0 0 0

Zone1

Area1 1

209 NC6 22.079 110.4 -2.1 1.619 0.773 0 0 0 0 0

Zone1

Area1 1

ID Node Element Type P Q I Angle I Loading P Loss Q Loss P Fe P Comp Q Comp TapName Name MW MVar kA % MW MVar MW MW MVar

281 Nc2 LC3-2 Line 4.637 2.156 0.132 -25.6 41.85 0.0536 0.0505 0 0

281 NC3 LC3-2 Line -4.584 -2.105 0.132 154.4 41.87 0.0536 0.0505 0 0

273 NC3 LC4-3 Line 3.075 1.34 0.088 -24.5 27.84 0.0133 0.011 0 0

273 NC4 LC4-3 Line -3.061 -1.329 0.088 155.4 27.85 0.0133 0.011 0 0

297 MT LC 1-0 Line 5.46 2.675 0.153 -26.2 48.52 0.0562 0.0542 0 0

297 Nc1 LC 1-0 Line -5.404 -2.621 0.153 153.7 48.53 0.0562 0.0542 0 0

289 Nc1 LC 2-1 Line 5.212 2.502 0.147 -26 46.72 0.0542 0.0521 0 0

289 Nc2 LC 2-1 Line -5.158 -2.45 0.147 153.9 46.73 0.0542 0.0521 0 0

48 N52 SEN Feeder -8.845 -4.053 0.049 155.4

69 IT L1 Line -8.825 -4.852 0.051 150.9 10.65 0.0202 -0.7999 0 0

69 N52 L1 Line 8.845 4.053 0.049 -24.6 10.24 0.0202 -0.7999 0 0

337 NC10 C10 Load 0.331 0.16 0.009 -27.4

350 NC9 C9 Load 0.246 0.126 0.007 -29

363 NC8 C8 Load 0.592 0.252 0.017 -25

96 IT TR1 2W Transformer 5.492 2.924 0.031 -28.3 0 0.0324 0.2484 0.022 4

376 NC7 C7 Load 0.455 0.221 0.013 -27.9

115 MT1 TR2 2W Transformer -3.308 -1.581 0.093 153 0 0.0242 0.3479 0.021 4

96 MT TR1 2W Transformer -5.46 -2.675 0.153 153.8 0 0.0324 0.2484 0.022 4

115 IT TR2 2W Transformer 3.333 1.929 0.019 -30.3 0 0.0242 0.3479 0.021 4

389 NC6 C6 Load 1.619 0.773 0.047 -27.6

137 MT Coupler Coupler 0 0 0 0 0 0 0


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9

137 MT1 Coupler Coupler 0 0 0 0 0 0 0

420 NC5 C5 Load 1.73 0.633 0.049 -21.3

433 NC4 C4 Load 1.328 0.695 0.039 -28.7

446 NC3 C3 Load 1.509 0.765 0.044 -27.9

459 Nc2 C2 Load 0.521 0.294 0.015 -30.1

472 Nc1 C1 Load 0.192 0.119 0.006 -32.2

220 NC9 LC10-9 Line -2.936 -1.387 0.084 152.9 26.63 0.0186 0.0148 0 0

220 NC10 LC10-9 Line 2.954 1.401 0.084 -27 26.62 0.0186 0.0148 0 0

212 NC10 LC10 Line -3.285 -1.562 0.093 152.9 29.61 0.023 0.0193 0 0

212 MT1 LC10 Line 3.308 1.581 0.093 -27 29.59 0.023 0.0193 0 0

233 NC8 LC9-8 Line -2.675 -1.25 0.077 153 24.38 0.0145 0.0109 0 0

233 NC9 LC9-8 Line 2.69 1.261 0.077 -26.9 24.37 0.0145 0.0109 0 0

249 NC6 LC7-6 Line -1.619 -0.773 0.047 152.4 14.89 0.0026 0.0007 0 0

249 NC7 LC7-6 Line 1.622 0.774 0.047 -27.5 14.89 0.0026 0.0007 0 0

241 NC7 LC8-7 Line -2.077 -0.994 0.06 152.4 19.08 0.0057 0.0033 0 0

241 NC8 LC8-7 Line 2.083 0.998 0.06 -27.5 19.07 0.0057 0.0033 0 0

265 NC4 LC5-4 Line 1.733 0.634 0.049 -21.2 15.4 0.0034 0.0012 0 0

265 NC5 LC5-4 Line -1.73 -0.633 0.049 158.7 15.41 0.0034 0.0012 0 0

257 NC5 LC 6-5 Line 0 0 0 0 0 0 0 0 0

257 NC6 LC 6-5 Line 0 0 0 0 0 0 0 0 0


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c) Stabilirea numarului optim de transformatoare in paralel.

Tabelul 6 Numarul optim de transformatoare paralel si claculul prizei

Sn 16 MVA

DP0 18 kW

DPsc 94 kW

P Load Q Load

MW MVar

3.244 1.532

Incarcare pe sectia 1 a barelor de MT Incarcare pe sectia 2 a barelor de MT

Calculul prizei

Psc= 94 [kW]

r0 IT= 0.122 /km

U1= 115.5 kV

Rt= 0.17771875

Zt= 3.3275

= 0

cr= 0.343559001

= 0.589448143

cr= 0.334285961

P Load Q Load

MW MVar

5.279 2.506

|S|= 9.43117 MVA


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Xt= 3.332242519

Rst= 0.088859375

Xst= 1.666121259

RL= 2.745

XL= 8.685

R= 2.833859375

X= 10.35112126

P2= 8.523 MW

Q2= 4.038 MVAr

UnMT= 22 kV

x0 IT= 0.386 /km

U2 dorit= 21.5 kV

SnT= 16 MVA

L it= 22.5 km

U

trafo= 1.78

% pt un

plot

u sc= 11 %

Un IT= 110 kV

Conform calculelor efectuate,plotul de transformare al transformatoarelor va fi :

np= 3.880922996 ==> nr ploturi= 4

In urma calculelor realizate se stabileste ca numarul optim de transformatoare paralel este de 2 transformatore, cupla deschisa, intrucat

aceasta varianta prezinta cele mai mici pierderi totale.


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6

In reteaua electrica de medie tensiune va fi amplasata o sursa de generare distribuita,situata la distanta de 0,75km de

consumatorul C5conform figurii de mai sus


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Exista 2 solutii de conectare a sursei distribuite:

1) Se considera sursa distribuita conectata la retea prin intermediul nodului C5.

In urma simularii imaginii de mai sus pentru mai multe puteri ale sursei distribuite s-au

obtinut rezultatele:

Cos fi=0.85

pierderi pentru

conectarea la c5

P=1

Network MW Losses =

0.323950

P=2minimNetwork MW Losses =0.300219

P=3

Network MW Losses =

0.313147

Se observa ca puterea sursei distribuite pentru care s-au obtinut pierderi minime este PGD=

2MW.

2)

Se considera sursa distribuita conectata la retea printr-o linie electrica direct la bara deMT a statiei.

In urma simularii imaginii de mai sus pentru mai multe puteri ale sursei distribuite s-au


P=1 minim Network MW Losses =

0.295

0.3

0.305

0.31

0.315

0.32

0.325

0.33

0 0.5 1 1.5 2 2.5 3 3.5

Series1


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0.382316

P=2Network MW Losses =0.409300

P=3

Network MW Losses =

0.472387

Se observa ca puterea sursei distribuite pentru care s-au obtinut pierderi minime este PGD=1

MW.

Stabilirea puterii maxime ce poate fi generate de sursa distribuita

In urma simularii in Neplan a celor doua variante de conectare a sursei distribuite s-au


Puterea maxima pentru conectarea directa la bara de MT=8

Puterea maxima pentru conectarea directa la C5=8

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

0.5

0 0.5 1 1.5 2 2.5 3 3.5

Series1


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Analiza circulatiei de puteri pentru diferite regimuri de functionare ale sursei distribuite

a)Variatia nivelului de tensiune in retea considerand sursa distribuita conectata direct in punctual C5 si

generand o putere maxima Pgd=8MW.conectare la C5 cos phi=1

ID Node U uAngleU P Load Q Load P Gen

Name kV % MW MVar MW

553 NGD 20.254 101.27 -1.7 0 0 2

52 N52 115.5 105 0 0 0 6.757

78 MT 21.01 105.05 -1.6 0 0 0

65 IT 115.002 104.55 -0.2 0 0 0

82 MT1 21.17 105.85 -1.6 0 0 0

155 Nc1 20.778 103.89 -1.7 0.192 0.119 0

189 NC5 20.23 101.15 -1.8 1.73 0.633 0

185 NC4 20.239 101.2 -1.8 1.328 0.695 0

181 NC3 20.309 101.54 -1.8 1.509 0.765 0

177 Nc2 20.549 102.75 -1.8 0.521 0.294 0

205 NC7 20.538 102.69 -2.2 0.455 0.221 0

201 NC8 20.618 103.09 -2.1 0.592 0.252 0

197 NC9 20.776 103.88 -2 0.246 0.126 0

193 NC10 20.963 104.81 -1.8 0.331 0.16 0

209 NC6 20.491 102.45 -2.3 1.619 0.773 0

conectare la c5 capacitiv cos fi=0.95

ID Node U uAngleU P Load Q Load P Gen Q Gen

Name kV % MW MVar MW MVar

553 NGD 20.513 102.57 -2 0 0 2 0.657

52 N52 115.5 105 0 0 0 6.736 3.348

78 MT 21.129 105.65 -1.6 0 0 0 0

65 IT 115.056 104.6 -0.2 0 0 0 0

82 MT1 20.824 104.12 -1.6 0 0 0 0155 Nc1 20.926 104.63 -1.7 0.192 0.119 0 0

189 NC5 20.482 102.41 -2.1 1.73 0.633 0 0

185 NC4 20.475 102.37 -2.1 1.328 0.695 0 0

181 NC3 20.524 102.62 -2.1 1.509 0.765 0 0

177 Nc2 20.728 103.64 -1.9 0.521 0.294 0 0

205 NC7 20.18 100.9 -2.3 0.455 0.221 0 0


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201 NC8 20.262 101.31 -2.2 0.592 0.252 0 0

197 NC9 20.423 102.11 -2 0.246 0.126 0 0

193 NC10 20.613 103.06 -1.8 0.331 0.16 0 0

209 NC6 20.132 100.66 -2.3 1.619 0.773 0 0

conectare la c5 inductiv=0.95

ID Node U u

Angle

U P Load Q Load P Gen Q Gen


553 NGD 19.986 99.93 -1.3 0 0.657 2 0

52 N52 115.5 105 0 0 0 6.79 4.785

78 MT 20.887 104.44 -1.6 0 0 0 0

65 IT 114.947 104.5 -0.2 0 0 0 0

82 MT1 21.16 105.8 -1.5 0 0 0 0

155 Nc1 20.625 103.12 -1.6 0.192 0.119 0 0

189 NC5 19.97 99.85 -1.4 1.73 0.633 0 0

185 NC4 19.996 99.98 -1.5 1.328 0.695 0 0

181 NC3 20.086 100.43 -1.6 1.509 0.765 0 0

177 Nc2 20.365 101.82 -1.6 0.521 0.294 0 0

205 NC7 20.527 102.64 -2.2 0.455 0.221 0 0

201 NC8 20.607 103.04 -2.1 0.592 0.252 0 0

197 NC9 20.765 103.83 -2 0.246 0.126 0 0

193 NC10 20.952 104.76 -1.8 0.331 0.16 0 0

209 NC6 20.48 102.4 -2.3 1.619 0.773 0 0

conectare la c5 inductiv cos fi=0.9



553 NGD 19.856 99.28 -1.2 0 0.969 2 0

52 N52 115.5 105 0 0 0 6.81 5.137

78 MT 20.828 104.14 -1.6 0 0 0 0

65 IT 114.92 104.47 -0.2 0 0 0 0

82 MT1 21.155 105.77 -1.5 0 0 0 0

155 Nc1 20.551 102.75 -1.6 0.192 0.119 0 0189 NC5 19.844 99.22 -1.3 1.73 0.633 0 0

185 NC4 19.878 99.39 -1.4 1.328 0.695 0 0

181 NC3 19.979 99.89 -1.5 1.509 0.765 0 0

177 Nc2 20.276 101.38 -1.5 0.521 0.294 0 0

205 NC7 20.522 102.61 -2.2 0.455 0.221 0 0

201 NC8 20.602 103.01 -2.1 0.592 0.252 0 0


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197 NC9 20.76 103.8 -2 0.246 0.126 0 0

193 NC10 20.947 104.73 -1.8 0.331 0.16 0 0

209 NC6 20.474 102.37 -2.3 1.619 0.773 0 0

conectare la c5 capacitiv=0.9



553 NGD 20.267 101.33 -2.3 0 0 2 0.969

52 N52 115.5 105 0 0 0 6.73 3.018

78 MT 20.828 104.14 -1.6 0 0 0 0

65 IT 115.081 104.62 -0.2 0 0 0 0

82 MT1 20.829 104.14 -1.6 0 0 0 0

155 Nc1 20.635 103.18 -1.8 0.192 0.119 0 0

189 NC5 20.231 101.15 -2.3 1.73 0.633 0 0

185 NC4 20.216 101.08 -2.3 1.328 0.695 0 0

181 NC3 20.257 101.29 -2.3 1.509 0.765 0 0

177 Nc2 20.447 102.24 -2 0.521 0.294 0 0

205 NC7 20.185 100.93 -2.3 0.455 0.221 0 0

201 NC8 20.267 101.33 -2.2 0.592 0.252 0 0

197 NC9 20.428 102.14 -2 0.246 0.126 0 0

193 NC10 20.617 103.09 -1.8 0.331 0.16 0 0

209 NC6 20.137 100.68 -2.3 1.619 0.773 0 0

b)Variatia nivelului de tensiune in retea considerand sursa distribuita conectata direct la bara de medietensiune si generand o putere maxima Pgd=8MW.

Conectarea la bara de MT pentru cos fi = 1

ID Node U u

Angle



553 NGD 21.334 106.67 -1.8 0 0 1 0.484

52 N52 115.5 105 0 0 0 7.894 3.755

78 MT 21.053 105.26 -2.1 0 0 0 0

65 IT 114.998 104.54 -0.2 0 0 0 0

82 MT1 21.169 105.85 -1.6 0 0 0 0

155 Nc1 20.736 103.68 -2.4 0.192 0.119 0 0

189 NC5 19.885 99.42 -3.4 1.73 0.633 0 0


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185 NC4 19.943 99.71 -3.3 1.328 0.695 0 0

181 NC3 20.072 100.36 -3.1 1.509 0.765 0 0

177 Nc2 20.419 102.1 -2.7 0.521 0.294 0 0

205 NC7 20.537 102.69 -2.3 0.455 0.221 0 0

201 NC8 20.617 103.09 -2.2 0.592 0.252 0 0

197 NC9 20.775 103.88 -2 0.246 0.126 0 0

193 NC10 20.962 104.81 -1.8 0.331 0.16 0 0

209 NC6 20.49 102.45 -2.3 1.619 0.773 0 0

conectarea MT pt cos fi=0.95 capacitiv


Name kV % MW MVar MW MVar553 NGD 21.277 106.38 -1.7 0 0 1 0.329

52 N52 115.5 105 0 0 0 7.894 3.917

78 MT 21.026 105.13 -2.1 0 0 0 0

65 IT 114.986 104.53 -0.2 0 0 0 0

82 MT1 21.167 105.84 -1.6 0 0 0 0

155 Nc1 20.708 103.54 -2.4 0.192 0.119 0 0

189 NC5 19.856 99.28 -3.4 1.73 0.633 0 0

185 NC4 19.914 99.57 -3.3 1.328 0.695 0 0

181 NC3 20.043 100.21 -3.1 1.509 0.765 0 0

177 Nc2 20.391 101.95 -2.7 0.521 0.294 0 0205 NC7 20.535 102.67 -2.3 0.455 0.221 0 0

201 NC8 20.615 103.08 -2.2 0.592 0.252 0 0

197 NC9 20.773 103.87 -2 0.246 0.126 0 0

193 NC10 20.96 104.8 -1.8 0.331 0.16 0 0

209 NC6 20.487 102.44 -2.3 1.619 0.773 0 0

conectarea MT pt cos fi= 0.95, inductiv



553 NGD 21.033 105.16 -1.4 0 0.329 1 0

52 N52 115.5 105 0 0 0 7.9 4.612

78 MT 20.909 104.54 -2.1 0 0 0 0

65 IT 114.934 104.49 -0.2 0 0 0 0


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82 MT1 21.157 105.79 -1.6 0 0 0 0

155 Nc1 20.589 102.94 -2.4 0.192 0.119 0 0

189 NC5 19.732 98.66 -3.4 1.73 0.633 0 0

185 NC4 19.79 98.95 -3.3 1.328 0.695 0 0

181 NC3 19.92 99.6 -3.1 1.509 0.765 0 0

177 Nc2 20.27 101.35 -2.7 0.521 0.294 0 0

205 NC7 20.525 102.62 -2.3 0.455 0.221 0 0

201 NC8 20.605 103.02 -2.2 0.592 0.252 0 0

197 NC9 20.763 103.81 -2 0.246 0.126 0 0

193 NC10 20.95 104.75 -1.8 0.331 0.16 0 0

209 NC6 20.477 102.39 -2.3 1.619 0.773 0 0

conectarea MT pt cos fi= 0.9 ,inductiv

ID Node U u

Angle



553 NGD 20.974 104.87 -1.3 0 0.484 1 0

52 N52 115.5 105 0 0 0 7.903 4.779

78 MT 20.88 104.4 -2.1 0 0 0 0

65 IT 114.921 104.47 -0.2 0 0 0 0

82 MT1 21.155 105.77 -1.6 0 0 0 0

155 Nc1 20.56 102.8 -2.4 0.192 0.119 0 0

189 NC5 19.702 98.51 -3.4 1.73 0.633 0 0

185 NC4 19.76 98.8 -3.3 1.328 0.695 0 0

181 NC3 19.89 99.45 -3.1 1.509 0.765 0 0

177 Nc2 20.241 101.2 -2.7 0.521 0.294 0 0

205 NC7 20.522 102.61 -2.3 0.455 0.221 0 0

201 NC8 20.602 103.01 -2.2 0.592 0.252 0 0

197 NC9 20.761 103.8 -2 0.246 0.126 0 0

193 NC10 20.947 104.74 -1.8 0.331 0.16 0 0

209 NC6 20.475 102.37 -2.3 1.619 0.773 0 0

conectarea MT pt cos fi = 0.9 ,capacitiv



553 NGD 21.334 106.67 -1.8 0 0 1 0.484

52 N52 115.5 105 0 0 0 7.894 3.755

78 MT 21.053 105.26 -2.1 0 0 0 0


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65 IT 114.998 104.54 -0.2 0 0 0 0

82 MT1 21.169 105.85 -1.6 0 0 0 0

155 Nc1 20.736 103.68 -2.4 0.192 0.119 0 0

189 NC5 19.885 99.42 -3.4 1.73 0.633 0 0

185 NC4 19.943 99.71 -3.3 1.328 0.695 0 0

181 NC3 20.072 100.36 -3.1 1.509 0.765 0 0

177 Nc2 20.419 102.1 -2.7 0.521 0.294 0 0

205 NC7 20.537 102.69 -2.3 0.455 0.221 0 0

201 NC8 20.617 103.09 -2.2 0.592 0.252 0 0

197 NC9 20.775 103.88 -2 0.246 0.126 0 0

193 NC10 20.962 104.81 -1.8 0.331 0.16 0 0

209 NC6 20.49 102.45 -2.3 1.619 0.773 0 0


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Reglajul tensiunii in functie de regimurile de functionare ale sursei distribuite ,astfel incat nivelul

de tensiune pe bara de MT a ST sa fie egala cu 21,5 kV

In acest caz se urmareste obtinerea unei tensiuni de 21,5 kVpe bara de MT a statiei.

Se calculeaza prize de functionare pentru cele 2 regimuri(cos fi=0.95,capacitive si

inductive),pentru fiecare situatie de conectare a sursei distribuite la retea.

Psc= 94 [kW]

r0 IT= 0.122 /km

U1= 115.5 kV

UnMT= 22 kV

x0 IT= 0.386 /km

U2dorit= 21.5 kV

SnT= 16 MVA

L it= 22.5 km

Utrafo= 1.78

% pt unplot

u sc= 11 %

Un IT= 110 kV

Rt= 0.177719

Zt= 3.3275

Xt= 3.332243

Rst= 0.088859

Xst= 1.666121

RL= 2.745

XL= 8.685

R= 2.833859

X= 10.35112

a)Pentru cazul sursei distribuite conectate in nodul consumatorului C5,avand cos

fi=0.95,inductive:


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P2= 0.523 MW

Q2= 6.667 MVAr

np= 3.860157 ==> nr ploturi= 4

b)Pentru cazul sursei distribuite conectate in nodul consumatorului C5,avand cos

fi=0.95,capacitiv:

P2= 0.523 MW

Q2= 1.409 MVAr

np= 4.108035 ==> nr ploturi= 4

c)Pentru cazul sursei distribuite conectate direct la statia de MT,avand cos fi=0.95,inductivv:

P2= 0.523 MW

Q2= 6.667 MVAr

np= 3.860157 ==> nr ploturi= 4

d)Pentru cazul sursei distribuite conectate direct la statia de MT,avand cos fi=0.95,capacitiv:

P2= 0.523 MW

Q2= 1.409 MVAr

np= 4.108035 ==> nr ploturi= 4

Stabilirea prizei optime de functionare atransformatorului in scopul minimizarii pierderilor de putere

active

Se determina priza optima de functionare avand valori intre 8 si -8 pentru plotul active al transformatoarelor

in Neplan tinand cont de urmatoarele restrictii:

Umt>18 kV

Umt


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a)Pentru cazul sursei distribuite conectate in nodul consumatorului C5,avand cos fi =0.95,inductiv:

nr priza dp

4 Network MW losses = 0.522225




0Network MW losses =0.458116 U>22

Deci delta P min pentru plot=2 este optim

b)Pentru cazul sursei distribuite conectate in nodul consumatorului C5,avand cos fi =0.95,capacitiv:

nr priza dp






Deci delta P min pentru plot=3 este optim.

c)Pentru cazul sursei distribuite conectate direct la statia de MT,avand cos fi =0.95,inductiv

nr priza dp






-1 Network MW losses = 0.837625

Deci delta P min pentru plot=1 este optimd)Pentru cazul sursei distribuite conectate direct la statia de MT,avand cos fi =0.95,capacitiv

nr priza dp



2 Network MW losses =0.800198



-1 Network MW losses = 0.730607

Deci delta P min pentru plot=1 este optim


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Stabilirea configuratiei optime a retelei de MT prin reconfigurare in prezenta SD

Pentru recofigurarea retelei electrice de medie tensiune se deconecteaza pe rand cate o linie pentru agasi configuratia cu pierderi minime.

a)Pentru cazul sursei distribuite conectate in nodul consumatorului C5,avand cos fi=0.95,inductiv,iar

transformatoarele functionand pe plotul 2,calculate anterior ca fiind optim pentru acest regim defunctionare si mod de conectare:

Se alege pentru a fi deconectata linia dintre consunmatorii C6 si C7,deoarece are pierderile minime, dupacum se poate observa si in tabelul anterior.

b)Pentru cazul sursei distribuite conectate in nodul consumatorului C5,avand cos fi=0.95,capacitiv,iartransformatoarele functionand pe plotul 3,calculate anterior ca fiind optim pentru acest regim de

functionare si mod de conectare:

LC 1-2 0.115001

LC 2-3 0.109879

LC 3-4 0.163438

LC 4-5 0.290442

LC 5-6 0.265696

LC 6-7 0.135961

LC 7-8 0.119028

LC 8-9 0.109367

LC 9-10 0.109883

Se alege pentru a fi deconectata linia dintre consunmatorii C8 si C9,deoarece are pierderile minime, dupacum se poate observa si in tabelul anterior.

c)Pentru cazul sursei distribuite conectate direct la statia de MT,avand cos fi=0.95,inductiv,iar

transformatoarele functionand pe plotul 1,calculate anterior ca fiind optim pentru acest regim de

functionare si mod de conectare:linie deconectata delta P

LC 1-2 1.402137

LC 2-3 1.267799

LC 3-4 1.004097

LC 4-5 0.894273

LC 5-6 0.89778

linie deconectata delta P

LC 1-2 0.542023

LC 2-3 0.492868

LC 3-4 0.449212

LC 4-5 0.504773

LC 5-6 0.489081

LC 6-7 0.43698

LC 7-8 0.445368

LC 8-9 0.467361

LC 9-10 0.484461


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LC 6-7 1.054919

LC 7-8 1.128397

LC 8-9 1.241664

LC 9-10 1.298233

Se alege pentru a fi deconectata linia dintre consunmatorii C4 si C5,deoarece are pierderile minime, dupa

cum se poate observa si in tabelul anterior.

d)Pentru cazul sursei distribuite conectate direct la statia de MT,avand cos fi=0.95,capacitiv,iartransformatoarele functionand pe plotul 1,calculate anterior ca fiind optim pentru acest regim de

functionare si mod de conectare:

linie deconectata delta P

LC 1-2 1.303724

LC 2-3 1.169962

LC 3-4 0.904399

LC 4-5 0.787739

LC 5-6 0.776508

LC 6-7 0.90614

LC 7-8 0.968852

LC 8-9 1.066129

LC 9-10 1.114575

Se alege pentru a fi deconectata linia dintre consunmatorii C3 si C4,deoarece are pierderile minime,dupa cum se poate observa si in tabelul anterior.

Analiza influntei sursei distribuite asupra curentilor de scurtcircuit

Curent de scurtcircuit generator asincron nod C5

Buicescu Lucian MS912321-Proiect IGD

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