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الورقة الثالثة –البرنامج الهندسي امتحان الشهادة الجامعية المتوسطة نظم القوى الكهربائية : التخصص 2013لعام الشتوية الدورة

Examinations& evaluation unit winter.2013

111

1

2

3 coil

4

5 step up transformers

6 indoor substations

7 series impedance

R-C R-L-C

R-L L-C

8

9

Km800 Km600

Km250 Km60

10

11 concrete poles :

66kV

12 uniform

100



211

Т

л

13 suspension insulators

kV9 kV11

kV13 kV15

14 tension insulators

30

60

15

operation diagram secondary diagram

one line diagram block diagram

16

17

18 reactive power

19

20

1

21 Copper losses

I2Z 3 I

2V 3

22 5001000

(DC (5A )

A 2.5 A 10

5A Zero

23

(V90

90



311

0

°180

24 0.025 wb50Hz200

1110V 444V

500V 200V

25 2000400 = 0.5Ω2R

(R2)

2 Ω0 0. 0.5 Ω

Ω12.5 0.25 Ω

26

27 Starting torque DC motor Series

28 reaction Armature

29 max(

30 DC machine80.03 WbLap-winding 100

(turns RPM1500

400V V150

200V 300V

31 Separately exited DC

generator250V

1500RPM100AIL=

N.m 159,155 N.m 169,3

N.m 176.51

N.m 165,4

32

33



411

34

DC motorExcitation)

Compound Series

Shunt Separately

35 )μ

F H B (

=B*Hμ =H*F μ

B/H μ =B*Fμ

36 25 KVA SN=electrical losses at full load) 960 watt 405

watt (η)full loadcosφ=0,8

90.34% 92.54%

91.5% 93.61%

37

38

39 (Line voltages) V1=17320V V2=400V)∆ YLine current

86.6 A

14.43 A 20A

43.3A 216.5A

40

e = -NdФ/dt .I E=(B*v

v).L E=(B* e =-NdB/dt

41 (Definite time

overcurrentprotection)



511

2445

42 P1

B1 B2

B4 B3

43 3

B6,B3 B6,B4

B5,B4 B5,B6

44 B4P2

B3 B2

B5 B1,B2

45 Back up protectionB6

B1,B3 B3,B2

B5B4 B1,B2

46

47

48 12A



611

4A 3 A

36 A 24 A

49

120V110V

50 magnetizing inrush current

51

52 Broken delta

53

54 vb1 9010 va1

1505 3010

305 9010

55

56 drop out ratio

57



711

58

59

60 sensitivity

61 4εr

2 3

4 5

62

A B

C F

63

64

65

2 3

4

5

66 10cm

20cmEmax25kv

cm

kv2.5

cm

kv6.3

cm

kv3.6

cm

kv5.8

67

cm



811

cm

1

Torr.cm

68 Pashen’s curve

69 C.B

70

71

72

filter drying

73

74

75

76 steepness

77



911

78 180Mw36kAµ sec6

10.8kwh 22kwh

8.1kwh 55.4kwh

79

80

81

82

83

84

85

86



1011

87

88

89 open

90

91

92

93 50m20MW85

903

1000m

kg2

8.9s

m



1111

s

m3

6.25

s

m3

4.53

s

m3

2.60

s

m3

10

94

water hummer

95

96

97

98

99 320 kwh 30 kw

0.75 0.55

0.89 0.6

100

Load factor

Demend factor

Capacity factor

Diversity

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