( (1 ) ) . (, ).
, , Z1 = Z2:
( 3.3)
:
( ) . , Zm . , 3U 0.
.3.4, , , .3.4, - , (1) 1 2. G .
.3.3. (), () () .
.3.4. .
:
.
(3.3). 1 Q 1 :
2 Q 1 , :
.
. , Z1 = Z2 :
(1,1) . , , I 0 (1) (1,1). , .
- .
- (.3.5).
.3.5. .
( - ). . () , . , , .
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, .
3.4. . Y /∆ ∆/ Y.
Y/∆. Y/∆ (.3.9, ). , = 1. Y/∆ 1, :
IY / I∆= w∆/wY = √3 (3.22)
, b (.3.9, ), I= 0, b , . . Ic = - Ib = IY (3.23)
.3.9, , : b a. 2 Ic∆ =2Ik / 3, Ia∆= Ib∆ = Ik / 3
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b . , , . . , .. 2 .
∆/ Y(.3.9, ). .
∆/ Y . , , , 2/√3 I Y . ∆/Y :
IAΔ = (IAY - IBY) / √3, IBΔ = (IBY - ICY) / √3, ICΔ = (ICY - IAY) / √3. (3.25) , :
I(2)AΔ = - I(2)BY / √3, I(2)BΔ =2I(2)BY / √3, I(2)CΔ = -I(2)CY / √3, IAY=0, ICY= - IBY (3.26)
, , , Y /∆ ( ∆/ Y) :
1. , - , . I, II, III (.3. 9) , 2 , ;
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2. . , .
: 2 , . , , :
(3.27)
3. , .3.9, , ;
4. ( ) 2 I, .
. , . :
(3.28)
I = 1. Y ∆ 1, : I Y /I∆=w∆/wY = √3 w∆=√3 wY (3.29)
6(10)/0,4 Y / Y 0 :
I(1)A = I1A+ I2A+ I0A; I1A = I2A= I0A (3.30)
I0 , (.3.10), , 2/3I(1), 1/3IA(1).
. 3.9.
: Y /∆-11 T = 1;
∆/ Y I = 1.
, , , . .
(∆/Y) , , .
I(2)=I(3)=I(3)/I; I(2)=-0.5 I(3) /I; I(2)=-0.5 I(3) /I; I1=I2=I(2)/√3. (3.31)
I1 I2 .
.3.10. Y /Y T = 1.
(Y/Y) , :
I(2) = I(2)/I; I(2) = - I(2) /I; I1 = I2 = I(2)/√3, (3.32)
I1 I2 .
.3.11. ∆/Y I = 1.
∆/Y Y/Y. (∆/Y) , .
I(1)= I(1)/√3I; I(1)=- I(1)/√3I; I1 = I2 = I(1)/√3= I(1)/3 I. (3.33)
(Y/Y) , 2/3 , .
I(1)=2/3 I(1)/I; I(1)= - I(1)/I/3; I(1)= - I(1)/I/3;I1 = I2 = I(1)/2. (3.34)
0,4 , . : , (3.35)
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I , .
3.2
o | U 1/ U 2 = 1 | |||
Y/Y-0 | a-o | Ia = U/Z1 | IA = 2Ia/3, IB = IC = Ia/3 | W = Wy |
b-c | Ib = Ic = /2 | IB = IC = /2 = 0,766 | ||
∆/Y-0 | a-o | Ia = 3U/Z1 = = U/Z = | IA = IB = Ia/ = 0,57 I(3) | W = Wy |
b-c | Ib = Ic = 3 /2 | IB = 2Ib = I(3), IA = IC = IB/2 | ||
Y/∆ | b-c | Ib = Ic = /2 | IA = IC = IB/2, IB = 2/ Ib = | W = Wy |
. .3.2 . , Y/Y I (3) . , U1x/U2x. .
, .3.2, :
1. , U2 ;
2. , U1, .3.2 .
3.5.
. . 25 : 833 480 , 578 . - , . , , . - 3 (U .., U .., U ..) . U . - , .. u . .
. 11677-75 , , 5% 10% ( 6 ) 25% . , , . , 9- , +16% 115(1 + 0,16)=133,4. 110 126 . 133,4 , 126 .
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Z :
, (3.36)
Z. , ;
∆N ; ( ), .
: 22,5%; 25630 · 635 61,67%= 10%. 16 %: .
, 22,5%, (3.36), :
.
16% . , .
, . , , , ( ). ( ) , .
() , .. , :
; (3.37)
,
U , ; 6,6; 6,3; 11 ;
U ., U ., U max. , , 110, 115, 126 35, 37, 40,5 ;
D U , 0,16 0,1 16 % 10 %;
S . , ; 2- 0,533 S .;
.max, .min 110 (35) , , .max < .min;
U .min, U .max , %; .1.8, 1.9 (.1)
(3.37) :
6(10) , U = U .-, .. U .min(max) ;
35 , U , 38,5 , U = U .-, u .min(max) .
() :
. (3.38)
:
; (3.39)