6 CALCULATION AND ANALYSIS OF NETWORK MODE
6.1 Preparation of input data. Calculation of modes
Perform the calculation of the maximum and minimum load. The results of the calculations will determine the loss of power and electricity to the grid. This will develop measures for their reduction and to evaluate the effectiveness of such measures.Calculate carry out sustainable mode using DigSILENT Power Factory. In Fig. 6.1 shows the design diagram network.To assess the adequacy of the control range of transformers is performed calculations desired voltage level on the tires according to the method of counter-consumer regulation. Calculation is made as follows.
Results of the calculation given in table 6.1.
Table 6.1 - Results of the calculation of the desired voltage at the bus-bars consumers
Name of substation |
Pmax МВт |
Pmin МВт |
% |
Uном мер кВ |
Uбаж max кВ |
Uбаж min кВ |
|||||||
Gorniak-110 (T1) |
Т1 |
6,48 |
1,68 |
-0,29 |
6,00 |
10,05 |
5,98 |
||||||
Stazhkovo-35 (T1)
|
Т1 |
1,98 |
1,44 |
3,05 |
6,00 |
8,90 |
6,18 |
||||||
Т2 |
1,20 |
0,72 |
2,14 |
6,00 |
4,41 |
6,13 |
|||||||
Davydovka-35 (T1) |
Т1 |
2,64 |
1,39 |
1,62 |
6,00 |
8,47 |
6,10 |
||||||
Т2 |
2,70 |
1,08 |
0,71 |
6,00 |
6,53 |
6,04 |
|||||||
Drowing 6.1 – Calculation scheme in the DigSILENT Power Factory for the site of an electric network which is considered
Input data to the graph for mode calculation the presented in a table 6.2 – 6.5.
Table 6.2 - Input data for the calculation scheme
Name of substation |
Uном кВ |
Type switchgear |
Gorniak-110 (T1) |
35 |
Two of the bus bar system |
Stazhkovo-35 (T1)
|
35 |
Two of the bus bar system |
6 |
Two of the bus barsystem |
|
Davydovka-35 (T1) |
35 |
Two of the bus bar system |
6 |
Two of the bus bar system |
Table 6.3 - Data of lines of electricity transmissions
Section |
Brand wire |
R0 Ом/км |
X0 Ом/км |
B0·10-6 См/км |
l км |
nкіл |
Uном |
Postnikovo-Stazh. |
АС-185/34 |
0,428 |
0,432 |
0 |
4,88 |
1 |
35 |
Stazhkovo –Dav. |
АС-150/27 |
0,198 |
0,406 |
0 |
0,025 |
1 |
35 |
АС-150/27 |
0,198 |
0,406 |
0 |
0,612 |
1 |
35 |
|
СА-70 |
0,428 |
0,432 |
0 |
5,64 |
1 |
35 |
|
Dav. - Gorniak |
АС-95/16 |
0,306 |
0,421 |
0 |
6,88 |
1 |
35 |
Gorniak- – Davydovka Severn |
АС-120/19 |
0,249 |
0,414 |
0 |
3,42 |
1 |
35 |
Table 6.4 – Data of transformers of a network of 35 kV according to 2013
№ тр |
Name of substation |
Type of transformer |
Scheme and group of connection of windings |
SНОМ МВА |
UВН кВ |
UНН кВ |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
1 |
Gorniak-110 (T1) |
ТДН-25000/35 |
Y\D-11 |
25 |
36,75 |
6,6 |
2 |
Stazhkovo-35 (T1) |
ТД-10000/35 |
Y\D-11 |
10 |
36,75 |
6,3 |
3 |
Stazhkovo-35 (T2) |
ТД-10000/35 |
Y\D-11 |
10 |
36,75 |
6,3 |
4 |
Davydovka-35 (T1) |
ТД-15000/35 |
Yo\D-11 |
15 |
36,75 |
6,6 |
5 |
Davydovka-35 (T2) |
ТД-15000/35 |
Yo\D-11 |
15 |
38 |
6,3 |
table 6.4 continuation
№ тр |
Name of substation |
DPК кВт |
DPХ кВт |
UК % |
Iх % |
Обм. рег. |
№ ст. |
% ст. |
1 |
2 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
1 |
Gorniak-110 (T1) |
145 |
25,8 |
14,72 |
0,65 |
1 |
±4 |
2,5 |
2 |
Stazhkovo-35 (T1) |
66 |
48,8 |
7,89 |
0,75 |
1 |
±2 |
2,5 |
3 |
Stazhkovo-35 (T2) |
90 |
21,3 |
9,3 |
0,75 |
1 |
±2 |
2,5 |
4 |
Davydovka-35 (T1) |
124 |
32 |
8,9 |
0,72 |
1 |
±2 |
2,5 |
5 |
Davydovka-35 (T2) |
137 |
26 |
9,8 |
0,72 |
1 |
±2 |
2,5 |
Table 6.5 – Date of the load node of network 35 kV
Name of substation |
Maximum power mode |
Minimum power mode |
|||||||||||
РМ МВт |
QМ Мвар |
QКУ Мвар |
Рм МВт |
Qм Мвар |
QКУ Мвар |
|
|||||||
Gorniak-110 (T1) |
6,48 |
2,16 |
- |
1,68 |
1,44 |
- |
|
||||||
Stazhkovo-35 (T1) |
1,98 |
0,36 |
- |
1,44 |
1,08 |
- |
|
||||||
Stazhkovo-35 (T2) |
1,20 |
0,84 |
- |
0,72 |
0,52 |
- |
|||||||
Davydovka-35 (T1) |
2,64 |
1,44 |
- |
1,39 |
0,98 |
- |
|||||||
Davydovka-35 (T2) |
2,70 |
0,90 |
- |
1,08 |
1,08 |
- |
|||||||
For an assessment of indicators of functioning of a projected network we will execute calculation of modes of the maximum and minimum loadings. Results of calculation of modes are presented in Addition B.