1 Purpose and objectives
The aim is to consolidate the theoretical knowledge and the development of students' autonomy in solving the problems, the acquisition of practical skills for working with technical literature, the normative and technical conditions in the computer. This calculation-graphic work number 2 is the sequel RGR number 1 on the subject "Power stations and substations"
Tasks RGR:
1) selection of the type, number and power transformers;
2) the calculation of annual energy losses in transformers.
2 Initial data
Student card number: 28
Type of fuel: fuel oil;
The number and power generators is 5 / 63 MW; 15 / 6 MW;
Quantity and power lines load on the generator voltage, MW: 16/6;
Consumption per SN% of Rust. gene .: 7%;
RUSN Rated voltage, KV 35;
The number of lines and the power loads RUSN, MW: 2/45;
Continuation of loads, winter-summer: 160/205;
Rated voltage lines to the system, KV 110;
Number parish lines and their length, km: 2/90.
In accordance with the given power in the initial data, we take to installation four turbogenerators of the type TVS-81U and one turbo-generator of the type TVF-9-2U.
Table 1 - Main technical characteristics
Type of turbogenerator |
|
ТВФ-9-2У |
ТВС-81У |
Nominal rot. frequency, rpm |
|
3000 |
3000 |
Nominal power |
Full, МV·А |
76,45 |
40 |
Active, MW |
54 |
35 |
|
Nom. voltage, kV |
|
8,3 |
8,3 |
cosφном |
|
0,9 |
0,9 |
Nominal current, kA |
|
6,89 |
4,11 |
Table 2 - Balance of power for normal version 1:
Defined parameter |
Period year/h |
0-8 |
8-18 |
18-24 |
1 Generation of power G-1 and G-2, MW |
Winter Sum |
22.4 17.2 |
24 19.2 |
22.4 17.2 |
2 Load G-1 and G-2, MW |
Winter Sum |
1.374 1.204 |
1.44 1.2672 |
1.374 1.204 |
3 Load generator G-3, MW |
Winter Sum |
1.8048 1.5744 |
1.92 1.6896 |
1.8048 1.5744 |
4 10 kV load, MW |
Winter Sum |
19 13.1 |
19 13.1 |
19 13.1 |
5 Loading of T-1 and T-2, MW (total) |
Winter Sum |
2.2464 3.0192 |
4.56 5.3328 |
2.2464 3.0192 |
6 Loading of each of the transformers T-1 and T-2, MW |
Winter Sum |
1.1232 1.5096 |
2.28 2.6674 |
1.1232 1.5096 |
7 Load of 35 kV, MW |
Winter Sum |
4.8 3.6 |
6 4.2 |
4.8 3.6 |
8 Loading of 10 kV windings T-3, MW |
Winter Sum |
30.195 30.425 |
30.08 30.3104 |
30.195 30.425 |
9 Loading of 35 kV winding T-3, MW |
Winter Sum |
2.5536 0.5808 |
1.44 –1.1328 |
2.5536 0.5808 |
10 Loading of windings 110 kV T-3, MW |
Winter Sum |
27.641 29.844 |
28.64 31.4432 |
27.641 29.844 |
Table 3 - Balance of power for the normal mode of option 2:
Defined parameter |
Period year/h |
0-8 |
8-18 |
18-24 |
1 Generation of power G-1 and G-2, MW |
Winter Sum |
21.6 16.8 |
24 19.2 |
21.6 16.8 |
2 Load G-1 and G-2, MW |
Winter Sum |
1.3536 1.1808 |
1.44 1.2672 |
1.3536 1.1808 |
3 Load generator G-3, MW |
Winter Sum |
1.8048 1.5744 |
1.92 1.6896 |
1.8048 1.5744 |
4 10 kV load, MW |
Winter Sum |
18 12.6 |
18 12.6 |
18 12.6 |
5 Loading of T-1 and T-2, MW (total) |
Winter Sum |
2.8764 3.3192 |
4.53 5.3124 |
2.8764 3.3192 |
6 Loading of each of the transformers T-1 and T-2, MW |
Winter Sum |
1.6232 1.5096 |
2.28 2.6674 |
1.6232 1.5096 |
7 Load of 35 kV, MW |
Winter Sum |
4.4 3.1 |
5 3.81 |
4.4 3.1 |
8 Power flow from 110 kV each of the transforms. T-1 and T-2 at 35 kV, MW |
Winter Sum |
1.3267 0.3012 |
0.72 -0.5664 |
1.3267 0.3012 |
9 Loading of 35 kV windings of each of the transformers T-1 and T-2, MW |
Winter Sum |
2.5 1.7 |
3 2.4 |
2.5 1.7 |
Figure 1 - Block diagram of a thermal power plant for 1 version
Figure 2 - Block diagram of a thermal power plant for 2 options