. ή = f (β) osφ2 = 1,0 osφ2 = 0,8 β, 0,25; 0,5; 0,75; 1,0 1,2,
ή = 2 /1 = 2 / (2 + 0 + β2 ) | (30) |
ή = 1 - (0 + β2 ) / (β S osφ2 + 0 + β2 ) | (32) |
S , .
(. 6).
. 6
, . , (28)
β , , . (31), β:
ήmax = 1 - 0 / (0,5 S osφ2 + 0 ) | (32) |
5.1. 1
1
S, | f, | U1, | U2, | I1, | I2, | i0, % | U, % | Δ, | Δ, |
I1 I2 I = ( ), U, Δ, Δ .
5.2. .
)
)
.7
.7 .7. . I10,.U10, P0, 505, U20 . , 0,5 U1 1,15 U1. . 2.
2
/ | ||||||||||
U10, | I10, | P0, | U20, | Zm, | Rm, | Xm, | i0, % | cosφ0 | K | |
14-18.
Zm, Rm, Xm, I10, P0, cosφ0 = f (U10)
5.3. .
8. 1 . 0 , (I1 = I1).
|
|
.8
. 3.
3
/ | |||||||||||
U1, | I1, | I2, | P, | U, % | Z, | R, | X, | cosφ | R1, | X1, | |
21-24, 27.
Z, I1, P, cosφ = f (U1)
5.4. , . 9
.9
, , I2 = 0,1 I2 I2 = (1,21,25) I2 ; U1 = U1 = const. osφ2 = 1. 5-6 .
osφ2 (osφ2 = 0,8).
. 4.
4
/ | ||||||||||||
U1 , | I1, | P1, | U2, | I2, | osφ1 | η | P2, | ΔU2, % | ΔU2, % | β | osφ2 | |
:
β = ; η = ; P2 = U2 I2 osφ2 ;
Δu2 % = (U20 U2) *100/ U20
Δu2 % = β (u% osφ2 + u% sin φ2);
sin φ2 = ; u% = R I100 / U1; u% = = X I 100 / U1
U2 = f (β) η = f (β)