8 The summary data of account of the transformer
8.1 Rated data:
SR = 160 кВА; V1R = 0.69 kВ; V2R = 6 kВ.
8.2 The circuit and group of connection: Y/Yo - O.
8.3 The basic geometrical data and relation:
dn = 0.16 m; l1 = l2 = 0.5 m; βn = 1.566; d12 = 0.234 m;
a1 = 0.014 m; a2 = 0.021 m; a12 = 39·10-3 m; С = 0.293m.
8.4 The data of windings:
Vturn = 5.922 V; W1 = 39 turns; W2 = 574 turns;
Swire1 = 134.2·10-6 m; Swire2 = 8.81·10-6 m2.
8.5 Type of windings:
а) low voltage winding – cylindrical, multilayer from rectangular wire;
b) High voltage winding – cylindrical, multilayer from whole wire.
8.6 Electromagnetic loadings:
Вleg = 1.55 T; Вyoke = 1.459 T;
Δ1 = 1.721·106А/m2; Δ2 = 1.971·106 А/m2.
8.7 Parameters of idling and short circuit:
РО = 0.569 Wt; IО = 1.949 %; РSC = 2.587 Wt; VSC = 4.678 %.
8.8 Properly sizeds:
А = 1.004 m; В = 0.414 m; Нb = 0.895 m.
8.9 The data of thermal account:
q1 = 972..314 wt/m2; q2 = 589.849 Wt/m2;
ΘОv1 = 57.943 оС; ΘОv2 = 60.138 оС.
8.10 Results of economic estimation of the transformer:
Gap = 587.165 kg; Gt =113.851 kg; Goiltrans =289.564 kg;
Gcard = 14.387 kg; Gstr = 102.42 kg; Gtotal =1329 kg.
Conclusion
The task for the course work was designing of power transformer with the given parameters.
In course work of designing the power transformer with aluminium windings was executed according to a technique stated in[1] і [2].
The basic geometrical relations, data of windings, parameters of idling and short circuit, properly sizeds, thermal account was carried out at performance of work. The settlement meanings of the basic electrical sizes are in allowable limits.
Three handing radiators with direct pipes are used for cooling the transformer.The difference of temperature windings is in allowable limits.
Tpansformer
TYPE ТМ 3 160/6
POWER 160 kV·А 50 Hz phase – 3 USC % 4.556
HV SIDE |
LV SIDE |
Scheme of connection Y/Yo - O |
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Degree of switch |
voltage, V |
current A |
voltage, V |
current A |
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|||
I |
+ 5% |
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|
|
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II |
+ 2,5% |
|
|
|
|
Weight, kg |
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III |
6000 |
15.396 |
400 |
230.94 |
Oil |
289.564 |
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IV |
– 2,5% |
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|
|
Act. Part. |
587.165 |
||
V |
– 5% |
|
|
|
Total |
1329 |
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Off-load tap changing of voltage