Обґрунтування оптимального місця підключення джерела розосередженого генерування та значення його потужності
Розглянуто підхід до визначення потужності джерела розосередженого генерування (ДРГ) та оптимального місця його підключення для забезпечення мінімального значення втрат активної потужності в замкненій електричній мережі напругою 110 кВ. Виконано аналіз впливу потужності сонячної електростанції на ре...
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| Veröffentlicht in: | Електротехніка і електромеханіка |
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| Datum: | 2019 |
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Інститут технічних проблем магнетизму НАН України
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| Zitieren: | Обґрунтування оптимального місця підключення джерела розосередженого генерування та значення його потужності / В.В. Кирик, О.С. Богомолова // Електротехніка і електромеханіка. — 2019. — № 2. — С. 55-60. — Бібліогр.: 8 назв. — укр., англ. |
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| author | Кирик, В.В. Богомолова, О.С. |
| author_facet | Кирик, В.В. Богомолова, О.С. |
| citation_txt | Обґрунтування оптимального місця підключення джерела розосередженого генерування та значення його потужності / В.В. Кирик, О.С. Богомолова // Електротехніка і електромеханіка. — 2019. — № 2. — С. 55-60. — Бібліогр.: 8 назв. — укр., англ. |
| collection | DSpace DC |
| container_title | Електротехніка і електромеханіка |
| description | Розглянуто підхід до визначення потужності джерела розосередженого генерування (ДРГ) та оптимального місця його підключення для забезпечення мінімального значення втрат активної потужності в замкненій електричній мережі напругою 110 кВ. Виконано аналіз впливу потужності сонячної електростанції на режимні параметри мережі. Запропоновано критерій визначення значення потужності ДРГ в вузлах можливого підключення. Розроблено рекомендації до визначення оптимального вузла підключення джерела розосередженого генерації відповідної потужності.
Goal. To analyze the options for the development of the 110 kV electricity network with sources of distributed generation. Establishing the relationship between power of the source of distributed generation with the voltage changes in the nodes and transformer active power losses change. To provide the minimum value of network active power loss the authors justify the conditions for optimal connection of the source of distributed generation and value of its power.
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ISSN 2074-272X. Electrical Engineering & Electromechanics. 2019. no.2 55
© V.V. Kyryk, O.S. Bohomolova
UDC 621.316 doi: 10.20998/2074-272X.2019.2.08
V.V. Kyryk, O.S. Bohomolova
JUSTIFICATION OF OPTIMAL LOCATION OF CONNECTION OF THE DISTRIBUTED
GENERATION SOURCE AND VALUE OF ITS POWER
Goal. To analyze the options for the development of the 110 kV electricity network with sources of distributed generation.
Establishing the relationship between power of the source of distributed generation with the voltage changes in the nodes and
transformer active power losses change. To provide the minimum value of network active power loss the authors justify the
conditions for optimal connection of the source of distributed generation and value of its power. Methodology. The authors
have used the DigSilent Power Factory software environment to create a 110 kV network model and have made a series of
simulation of the network operating modes with solar power plants. Results. Based on the operational parameters it is
established that the change in power generation in the accepted limits normally does not lead to abnormal voltage variations
in the nodes, with power losses having characteristic changes due to alterations in the network of power flows. In the network
with solar power plants, the transformer losses of active power is reduced with increasing generation power, except for the
most remote nodes from the balancing point, in which losses reduction takes place with load of transformers approximately up
to 60 %. At significant overloads of transformers (up to 130 %) there is reactive power losses increasing in comparison with
losses in the network without solar power plants. The dependence of active power losses in the network on the load of
transformers has a nonlinear character). For each node at one value of transformer load the active losses are different. Less
reactive power losses occur at lower load ratios of transformer. When increasing the load of transformers, the rate of increase
in reactive losses is higher than the active ones. Also for closed networks with voltage of 110 kV it has been found that the
optimal node for connecting the distributed generation is a node with a flow division of power. If there are several such nodes
in the network, the optimal one for connecting is the node with the maximum load. The optimal power of the solar station in
the node should not exceed 110 % of the installed transformer's power. Originality. For the first time the dependence between
the place of the best connection source of the distributed generation with the point of flow distribution with the greatest
current fraction from network balancing point was established. In this case the power of the source of distributed generation
must not exceed 10 % of the total power of the transformers in this node. Practical significance. We have obtained reasonable
conditions for connecting source of distributed generation to a closed electric network of 110 kV without performing large
volumes of mode calculations. Namely, the optimal connection point is the point of flow distribution with the greatest current
fraction from network balancing point. References 8, tables 3, figures 5.
Key words: source of distributed generation, flow distribution, load factor of transformer, power losses, voltage, power
factory, solar power station.
Висвітлено підхід до визначення потужності джерела розосередженого генерування (ДРГ) та оптимального місця
його підключення для забезпечення мінімального значення втрат активної потужності в замкненій електричній
мережі напругою 110 кВ. Виконано аналіз впливу потужності сонячної електростанції на режимні параметри
мережі. Запропоновано критерій визначення значення потужності ДРГ в вузлах можливого підключення. Розроблено
рекомендації до визначення оптимального вузла підключення джерела розосередженого генерації відповідної
потужності. Бібл. 8, табл. 3, рис. 5.
Ключові слова: джерела розподіленої генерації, потокорозподіл, коефіцієнт завантаження трансформатора, втрати
потужності, напруга, сонячна електростанція .
Освещено подход к определению мощности источника рассредоточенной генерации (ИРГ) и оптимального его
подключения для обеспечения минимального значения потерь активной мощности в замкнутой электрической сети
напряжением 110 кВ. Выполнен анализ влияния мощности солнечной электростанции на режимные параметры
сети. Предложен критерий определения значения мощность ИРГ в узлах возможного подключения. Разработаны
рекомендации к определению оптимального узла подключения источника рассредоточенного генерации
соответствующей мощности. Библ. 8, табл. 3, рис. 5.
Ключевые слова: источники распределенной генерации, потокораспределение, коэффициент загрузки
трансформатора, потери мощности, напряжение, солнечная электростанция.
Introduction. In the united power grid of Ukraine,
which is a system-forming branch, significant changes are
taking place. The centralized way of functioning of the
electric power system has exhausted its reserves. The
cost-extensive principle of raw materials (primarily
carbon and uranium) energy has led the industry to
inevitably increasing costs to maintain the parameters of
electrical equipment and networks within their operational
reliability.
Positive changes in the development of traditional
energy are undoubtedly at the minimum and further
functioning can take place in the direction of: the final
collapse and the achievement of the point of non-recovery
and destruction of the power system; or in the direction of
qualitative reformatting of the structure and philosophy of
functioning of the electric power industry, orientation to
the resourceless generation of renewable energy sources
(RES) on the principles of virtualization, with the
introduction of self-guided on the local levels «Smart
Grids», with the development of distribution networks
based on the introduction of new levels of voltage to
reduce power losses, improvement and development of
network topology.
World experience shows that with the increase of the
share of distributed generation, including on the basis of
56 ISSN 2074-272X. Electrical Engineering & Electromechanics. 2019. no.2
renewable energy sources, there is a need to solve a
number of problems: the stochastic nature of electricity
production, ensuring the reliable operation of distributed
generation (DG) objects in the composition of the
electricity system with a change of approach to mode-
technological design, planning and management,
regulation of frequency and voltage of DG objects,
ensuring the reliability and quality of power supply of
consumers, secured stable operation of distributed
generation sources (DGS). In Ukraine, these problems are
connected, on the one hand, with the state, operation and
features of the construction of electric networks, on the
other one – with the peculiarities of the functioning of the
DGS itself in normal and emergency conditions. The
introduction of DGS has a significant impact on the
operation of the united power grid and requires the
coordinated operation of system operators of trunk,
district and distribution networks in the planning and
monitoring of real-time operation modes [1].
Another problem that arises during the design phase
is the choice of the optimal place for connecting the DGS
to the electrical network, since this factor greatly affects
the power losses in the network as a whole. The desire of
the consumer to enter the power of DGS does not always
coincide with the technical capabilities of the network.
The difference between power losses, in the case when
the DGS is connected in the optimal and least optimal
nodes, may exceed 10 % [2].
In recent decades, many authors have proposed new
methods for optimizing the search for the location and
power of the DG source. Researchers [5] considered the
problem of finding a place for the installation of DGS
using a genetic algorithm to minimize the active power
flow across the network. In [6], two methods for locating
sources search are combined with a mix of the genetic
algorithm and the simulation meta-heuristic method of
selection. The authors of [7] applied the algorithm of the
search tab (local search) to simultaneously search for the
location of the DG source installation with the installation
of a source of reactive power in the network. In [8], an
optimization method based on colony of ants was
proposed as a means of solving the search for places and
power of DGS. For this method, the target function was
minimized based on the total cost of the network.
However, determination of the optimal place of
installation and power of DGS sources is not an end to the
investigated issue, because in many cases, instead of the
expected improvement of the parameters of the electric
network, their deterioration is observed. In this regard, in
the paper two important tasks are considered in the course
of the introduction of DRG, namely, the search for
optimal power and location of the source.
The goal of the work is to substantiate the choice of
the optimal location of the source of distributed
generation connection and the value of its power to
provide the minimum value of active power losses in the
network.
In distribution networks, the voltage drop goes along
the direction of electricity supply to customers, from the
main section of the power transmission line (PTL) to its
end. After the DGS is installed, in such an electrical
network the load on the feeder is reduced, and the voltage
along the PTL may increase. Important in this case is the
power factor of the DGS. The value of the voltage change
depends on the location of the DGS installation, its power
and соsφ (generation or consumption) [3].
It should also be noted that the active and reactive
load of nodes varies with time, which in turn causes
certain fluctuations in the voltage level in the network. In
the direction from the main section to the end of the PTL,
the voltage fluctuations tend to increase. If the load is
concentrated mainly at the end of the PTL or remote from
the balancing point, the voltage level will fluctuate more
intensively [4].
The introduction of DGS into the electrical network
leads to changes in its mode parameters: there is a
redistribution of power over the PTL and, accordingly,
change the profile of the voltage in the network.
Important is the place, that is, the node of the connection
of the DGS, and its power.
The installation of DGS in a closed district electrical
network (DEN) with random power generation change
can change the direction of power flows. In the
preliminary determination of the DGS connection node
and its power, it is necessary to take into account three
possible situations with regard to the nodal load and the
power of the DGS in the district electric network:
1. The own load of each node in the network is
greater than or equal to the output power of the DGS
connected to this node.
2. In DEN there is at least one node where the output
power of the DGS is greater than the own load of this
node, but the total power of the DGS of this DEN is in
general less than its total load.
3. There is at least one node in the network where
the output power of the DGS is greater than the own load
of this node and the total power of the DGS of this
network in general is larger than its total load.
In the first case, the installed DGS in the network
will affect the reduction of power losses in the network.
In the second case, DGS can permanently increase power
losses in some PTLs, but overall, total power losses in
DEN are reduced. In the third case, the total power losses
of the entire network will be greater than before the
installation of the DGS.
Thus, the installation of DGS can both increase and
decrease power losses in DEN, which mainly depends on
the connection nodes in the network, the power of the
DGS in the network, their power factor, as well as the
network topology.
To justify the expediency of optimal input of DGS
power at the nodes of a closed electric network, a startup
project was developed, the main idea of which is to
improve an existing electricity network by connecting a
new substation to provide a service for reliable electricity
supply to consumers and compare possible circuits for
connecting a substation to a network with competitive
variants with similar technical and economic indicators.
Thus, calculations of the mode parameters of five test 8-
node closed networks with voltage of 110 kV of different
configurations were carried out and the analysis of the
ISSN 2074-272X. Electrical Engineering & Electromechanics. 2019. no.2 57
influence of distributed generation sources on the network
operation mode was performed. In this case, variants of
connection of DGS with possible generation power in the
range from 13 to 31 MW with a 2 MW step for each of
the nodes of the circuit are considered. As a conditional
source of distributed generation, a solar photovoltaic
station (SPS) is selected on condition of acceptable
weather and territorial factors of its operation in the
network, that is, the influence of generation on the system
operating parameters such as voltage in nodes and power
losses in the lines are considered, without taking into
account the stochastic nature of the power.
The analysis of the mode parameters was performed
within 80 steady operating modes, calculated in the
software environment DigSilent Power Factory, for each
of the five electrical networks.
Figure 1 shows one of five circuits of the electrical
network, for which the analysis of the mode parameters
was performed at the input of distributed generation in the
network nodes.
Table 1 shows the values of the nominal voltages
and powers of the transformers installed in the network
nodes of the presented circuit.
Table 1
Parameters of transformers in the nodes of the network
Node No. 1 2 3 4
Utr, kV 110/35/10 110/35/10 110/35/10 110/35/10
Str, MVA 25 10 10 16
Node No. 5 6 7 8
Utr, kV 110/10 110/35/10 110/35/10 110/35/10
Str, MVA 10 16 10 16
Table 2 shows for the selective capacities (13, 23
and 31 MW) of the solar power plant at the network
nodes the calculated voltage levels at the voltage value of
115 kV level at the balancing point «0» (BP).
From Table 2 it is shown that the change in
generation power in the accepted limits does not cause
excessive voltage deviations in the nodes in the normal
mode, and network losses due to change in power flows
have characteristic changes.
Based on the simulation data of the modes, the
following graphic dependencies of the active (Fig. 2) and
reactive (Fig. 3) power losses on the load of transformers
in the network nodes were obtained, as well as the
dependence of the losses of active power on generation
power (Fig. 4).
In Fig. 2, 3 in the first node there is an uncharacteristic
for other nodes decline of power losses curve. This type
of curve is due to the fact that at the highest power of the
transformer at this point of the network (through the
power lines of the node significant power flows are
flowing) at the increase in SPS power there is a
significant unloading of the transformer and the reduction
of power flows along the lines and, consequently,
reducing the power losses in them and increase the
voltage level in the node.
Table 3 shows the values of active and reactive
power losses in the network when the transformers are
loaded in the nodes for selective power values of the SPS.
0
114,95 kV
0,0 deg
1
111,84 kV
-0,7 deg
8
110,45 kV
-1,0 deg
7
112,86 kV
-0,6 deg
6
112,34 kV
-0,8 deg
4
112,73 kV
-0,8 deg
3
111,75 kV
-0,8 deg
2
112,63 kV
-0,7 deg
5
110,29 kV
-1,0 deg
Generation = 15,00 MW 8,90 Mvar 17,44 MVA
External Infeed = 90,10 MW 77,77 Mvar 119,02 MVA
Нагрузка P(U) = 103,00 MW 82,66 Mvar 132,07 MVA
Потери = 2,10 MW 4,01 Mvar
Д
Р
Г
1
5,
0
M
W
8
,9
M
v
a
r
0-
4
A
C
-2
40
/3
2
27
,3
8
%
25,3 MW
20,7 Mvar
0,164 kA
-25,1 MW
-20,8 Mvar
0,167 kA
0-
2
A
C
-2
40
/3
2
22
,4
0
%
2
0
,2
M
W
17
,2
M
va
r
0
,1
33
k
A
-20,0 MW
-17,6 Mvar
0,137 kA
БП
90,1
77,8
0,598
Т1
ТДТН-25000/1 10
30,18 %
6,1 MW
8,5 Mvar
0,054 kA
-14,0 MW
-10,5 Mvar
0,226 kA
8,0 MW
2,7 Mvar
0,382 kA
Н1 НН
7,00 MW
6,17 Mvar
0,421 kA
Н1 СН
14,00 MW
10,50 Mvar
0,226 kA
1-4
AC-70/11
9,77 %
-2,9 MW
-4,1 Mvar
0,026 kA
2,9 MW
3,0 Mvar
0,021 kA
1-2
AC-70/11
10,69 %
-3,2 MW
-4,4 Mvar
0,028 kA
3,3 MW
3,5 Mvar
0,025 kA
3-6
AC-70/11
7,45 %
-2,5 MW
-2,9 Mvar
0,020 kA
2,5 MW
1,9 Mvar
0,016 kA
Н6 НН
6,00 MW
5,29 Mvar
0,395 kA
Н6 СН
11,00 MW
8,25 Mvar
0,184 kA
Н8 НН
5,00 MW
4,41 Mvar
0,330 kA
Н8 СН
8,00 MW
6,00 Mvar
0,134 kA
Т8
ТДТН-16000/1 10
57,83 %
13,1 MW
12,0 Mvar
0,093 kA
-8,0 MW
-6,0 Mvar
0,134 kA
-5,0 MW
-4,4 Mvar
0,330 kA
Н7 НН
4,00 MW
3,53 Mvar
0,251 kA
Н7 СН
7,00 MW
5,25 Mvar
0,117 kA
Т7
ТДТН-10000/1 10
77,50 %
11,1 MW
10,4 Mvar
0,078 kA
-7,0 MW
-5,2 Mvar
0,117 kA
-4,0 MW
-3,5 Mvar
0,251 kA
Т6
ТДТН-16000/110
74,87 %
17,1 MW
16,0 Mvar
0,120 kA
-11,0 MW
-8,2 Mvar
0,184 kA
-6,0 MW
-5,3 Mvar
0,395 kA
8-
5
A
C
-7
0/
11
3,
34
%
0,2 MW
0,8 Mvar
0,004 kA
-0,2 MW
-1,7 Mvar
0,009 kA
7-8
АСК-120/19
24,72 %
13,5 MW
12,1 Mvar
0,093 kA
-13,3 MW
-12,8 Mvar
0,096 kA
Н4 НН
3,00 MW
2,65 Mvar
0,192 kA
Н4 СН
9,00 MW
6,75 Mvar
0,147 kA
Т4
ТДТН-16000/1 10
51,57 %
12,1 MW
10,7 Mvar
0,083 kA
-9,0 MW
-6,7 Mvar
0,147 kA
-3,0 MW
-2,6 Mvar
0,192 kA
Н3 НН
2,00 MW
1,76 Mvar
0,125 kA
Н3 СН
7,00 MW
5,25 Mvar
0,117 kA
Т3
ТДТН-10000/1 10
62,78 %
9,1 MW
8,1 Mvar
0,063 kA
-7,0 MW
-5,2 Mvar
0,117 kA
-2,0 MW
-1,8 Mvar
0,125 kA
2-3
AC-70/11
16,44 %
6,7 MW
4,6 Mvar
0,042 kA
-6,6 MW
-5,2 Mvar
0,044 kA
Н2 НН
4,00 MW
3,53 Mvar
0,250 kA
Н2 СН
6,00 MW
4,50 Mvar
0,100 kA
Т2
ТДТН-10000/1 10
70,51 %
10,1 MW
9,4 Mvar
0,071 kA
-6,0 MW
-4,5 Mvar
0,100 kA
-4,0 MW
-3,5 Mvar
0,250 kA
Н5
10,00 MW
8,82 Mvar
0,624 kA
Т5 73
,1
10,1
9,7
0,073
-10,0
-8,8
0,624
4-
5
A
C
-7
0/
11
25
,2
5
%
10,1 MW
7,1 Mvar
0,063 kA
-9,9 MW
-8,1 Mvar
0,067 kA
0-6
AC-240/32
22,35 %
19,8 MW
17,4 Mvar
0,132 kA
-19,6 MW
-17,9 Mvar
0,136 kA
0-7
AC-240/32
27,95 %
24,8 MW
22,5 Mvar
0,168 kA
-24,6 MW
-22,5 Mvar
0,170 kA
Fig. 1. Calculation model of the circuit of the electric network with DGS in the first node in the software environment DigSilent
Power Factory
58 ISSN 2074-272X. Electrical Engineering & Electromechanics. 2019. no.2
Table 2
Voltage values in the nodes of the circuit 110 kV
РSPS
Point in which
SPS is connected
U1, kV U2, kV U3, kV U4, kV U5, kV U6, kV U7, kV U8, kV
1 2 3 4 5 6 7 8 9 10
0 MW – 109.6 111.91 111.24 112.2 109.95 112.17 112.8 110.27
1 111.56 112.54 111.68 112.67 110.25 112.32 112.85 110.43
2 110.2 112.84 111.9 112.32 110.03 112.39 112.81 110.31
3 110.01 112.55 112.84 112.28 110.00 112.75 112.81 110.29
4 110.04 112.03 111.32 113 110.47 112.19 112.89 110.54
5 109.88 111.98 111.29 112.72 112.21 112.18 113.22 111.54
6 109.75 112.14 111.86 112.22 109.97 113.41 112.9 110.28
7 109.64 111.92 111.24 112.28 110.37 112.17 113.64 110.93
13 MW
8 109.75 111.95 111.26 112.48 111.24 112.18 113.48 112.32
1 112.9 112.95 112 112.98 110.45 112.41 112.88 110.53
2 110.54 113.4 112.3 112.4 110.07 112.5 112.82 110.32
3 110.24 112.92 113.84 112.32 110.03 113.07 112.81 110.3
4 110.32 112.1 111.37 113.54 110.8 112.2 112.94 110.71
5 110.06 112.03 111.32 113.05 113.74 112.2 113.48 112.36
6 109.8 112.28 112.26 112.23 109.97 114.21 112.8 110.28
7 109.67 111.92 111.24 112.32 110.61 112.17 114.12 111.32
23 MW
8 109.84 111.97 111.27 112.65 112.08 112.18 113.9 113.68
1 113.9 113.27 112.19 113.2 110.59 112.48 112.9 110.6
2 110.77 113.77 112.54 112.42 110.09 112.57 112.82 110.33
3 110.39 113.16 114.52 112.34 110.04 113.28 112.81 110.31
4 110.51 112.15 111.4 113.9 111.03 112.21 112.97 110.83
5 110.18 112.08 111.34 113.29 114.85 112.19 113.67 112.98
6 109.89 112.37 112.53 112.34 109.98 114.76 112.8 110.28
7 109.68 111.92 111.24 112.35 110.76 112.17 114.44 111.58
31 MW
8 109.9 111.98 111.28 112.77 112.66 112.18 114.2 114.6
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
Fig. 2. Dependence of active power losses
on the load of the transformer
Fig. 3. Dependence of reactive power losses
on the load of the transformer
In the presence of the SPS in the network, the active
power losses is reduced with increasing generation power,
except for the most remote nodes from the balancing
point BP «0», in which the losses decrease of
approximately up to 60 % of the load of transformers
takes place. At significant overloads of transformers (up
to 130 %) there is an increase in reactive power losses in
comparison with losses in the network without power of
the SPS. The dependence of active power losses in the
network on the load of transformers has a nonlinear
character. For each node at one value of the load of the
transformer, the active losses are different. At lower load
ratios, less reactive power loss occurs. When increasing
the load of transformers, the rate of increase in reactive
losses is higher than the active ones.
Regardless of the connection place and the
generation power of the SPS, the active power losses in
the network are unequivocally reduced compared to the
losses in the network without the introduction of the SPS.
In presented in Fig. 1 network there are two nodes 1 and 5
in which there is flow distribution of power, that is, power
flows along the lines feeding the nodes are directed to
them from the balancing point.
In node 1, the load is greatest compared to other
nodes and is 21 % of the network load (Fig. 5). In this
case, the optimum power of generation of SPS, which can
be introduced into a node, should be about 29 MW at
power losses at the level ΔS = 1.89 – j3.64 MVA, the
values of which are the smallest in comparison with losses
when connecting SPS to other nodes. In the calculated
ISSN 2074-272X. Electrical Engineering & Electromechanics. 2019. no.2 59
mode without the introduction of generation in the network
power losses are at the level ΔS = 2.81 – j7.23 MVA.
At node 5, the load is 10.2 % of the total network load.
The optimal generation power of the SPS, which can be
introduced into node 5, should be approximately 19 MW,
with power losses at the level ΔS = 2.22 – j5.18 MVA.
Table 3
Power losses in the network and load of transformers
Power losses in the
circuit
Load of transformers, %
РSPS
Point in which
SPS is connected
ΔPΣ,
MW
ΔQΣ,
MVAr
1 2 3 4 5 6 7 8
0 MW – 2.81 7.23 59.78 71.01 63.09 51.83 73.3 75 77.55 57.93
1 2.16 4.26 30.35 70.58 62.82 51.6 73.1 74.89 77.51 57.85
2 2.53 5.45 59.43 41.42 62.69 51.77 73.3 74.84 77.54 57.91
3 2.47 5.82 59.54 70.57 51.75 51.79 73.3 74.58 77.54 57.92
4 2.57 5.65 59.53 70.93 63.04 29.65 73 74.96 77.48 57.78
5 2.29 5.27 59.62 70.96 63.06 51.58 16.6 74.99 77.23 57.23
6 2.58 4.72 59.69 70.85 62.71 51.82 73.3 36.68 77.54 57.93
7 2.59 5.54 59.75 71.01 63.09 51.79 73.0 75 41.31 57.57
13 MW
8 2.33 4.99 59.69 70.99 63.07 51.69 72.4 75 77.03 26.6
1 1.93 3.54 29.63 70.29 62.64 51.46 73 74.82 77.5 57.79
2 2.43 6.68 59.23 86.15 62.46 51.74 73.3 74.75 77.53 57.9
3 2.42 7.32 59.41 70.31 95.57 51.77 73.3 74.34 77.54 57.92
4 2.48 6.15 59.36 70.88 63 58 72.7 74.97 77.44 57.89
5 2.23 5.37 59.5 70.93 63.04 51.42 68.3 74.98 77 56.78
6 2.52 4.75 59.64 70.75 62.48 51.81 73.3 48.64 77.54 57.93
7 2.53 6.83 59.74 71 63.1 51.77 72.9 75 85.95 57.35
23 MW
8 2.2 5.28 59.64 70.1 63.07 51.61 71.9 74.99 76.72 51.61
1 1.9 3.76 44.19 70.08 62.52 51.35 72.9 74.77 77.47 57.75
2 2.42 8.95 59.1 120.06 62.31 51.72 73.2 74.71 77.53 57.9
3 2.48 9.77 59.32 70.15 128.7 51.76 73.3 74.19 77.54 57.91
4 2.47 7.45 59.25 70.84 62.99 79.96 72.6 74.97 77.42 57.62
5 2.36 6.28 59.44 70.91 63.03 51.31 111.1 74.98 76.89 56.46
6 2.54 5.76 59.61 70.69 82.32 51.81 73.3 70.79 77.55 57.93
7 2.53 9.13 59.74 71 68.08 51.76 72.8 75 119.81 27.21
31 MW
8 2.23 6.52 59.61 70.96 63.06 51.56 71.5 74.99 76.5 73.38
Fig. 4. Dependence of active power losses
on generation power
Fig. 5. The circuit of the electric network 110 kV
with coefficients of flow distribution of power
Thus, for the investigated eight-node closed
networks with voltage of 110 kV, a regularity has been
found which confirms that the optimal node for
connecting the DGS is the node in which the flow
distribution of the power takes place. If there are several
such nodes in the network, the optimal one for connecting
is the node with the maximum load. The optimal power of
the SPS in the node should not exceed 110 % of the
installed transformer's power.
Conclusions.
As an optimal place to connect a source of
distributed generation in a closed electric network with
voltage of 110 kV, to provide the minimum value of
active power losses, a node of flow distribution of power
60 ISSN 2074-272X. Electrical Engineering & Electromechanics. 2019. no.2
with the largest part of its current from the balancing
point can be considered.
As the optimum value of the power of the DGS in a
specific node, it is possible to accept power exceeding not
more than 10 % the total power of the transformers
installed there.
The proposed approach will allow to perform a
preliminary assessment of the location of the DGS
installation and the value of its power without spending
too much time for the large volumes of multivariate
calculations of network operation modes.
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Received 14.02.2019
V.V. Kyryk1, Doctor of Technical Science, Professor,
O.S. Bohomolova1, Assistant Lecturer,
1 National Technical University of Ukraine «Igor Sikorsky Kyiv
Polytechnic Institute»,
37, Prosp. Peremohy, Kyiv, Ukraine, 03056,
phone +380 44 4068234;
e-mail: vkyryk@ukr.net, BohomolovaOS@ukr.net
How to cite this article:
Kyryk V.V., Bohomolova O.S. Justification of optimal location of connection of the distributed generation source and
value of its power. Electrical engineering & electromechanics, 2019, no.2, pp. 55-60. doi: 10.20998/2074-
272X.2019.2.08.
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| id | nasplib_isofts_kiev_ua-123456789-159062 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 2074-272X |
| language | Ukrainian |
| last_indexed | 2025-12-07T16:48:24Z |
| publishDate | 2019 |
| publisher | Інститут технічних проблем магнетизму НАН України |
| record_format | dspace |
| spelling | Кирик, В.В. Богомолова, О.С. 2019-09-21T18:03:46Z 2019-09-21T18:03:46Z 2019 Обґрунтування оптимального місця підключення джерела розосередженого генерування та значення його потужності / В.В. Кирик, О.С. Богомолова // Електротехніка і електромеханіка. — 2019. — № 2. — С. 55-60. — Бібліогр.: 8 назв. — укр., англ. 2074-272X DOI: https://doi.org/10.20998/2074-272X.2019.2.08 https://nasplib.isofts.kiev.ua/handle/123456789/159062 621.316 Розглянуто підхід до визначення потужності джерела розосередженого генерування (ДРГ) та оптимального місця його підключення для забезпечення мінімального значення втрат активної потужності в замкненій електричній мережі напругою 110 кВ. Виконано аналіз впливу потужності сонячної електростанції на режимні параметри мережі. Запропоновано критерій визначення значення потужності ДРГ в вузлах можливого підключення. Розроблено рекомендації до визначення оптимального вузла підключення джерела розосередженого генерації відповідної потужності. Goal. To analyze the options for the development of the 110 kV electricity network with sources of distributed generation. Establishing the relationship between power of the source of distributed generation with the voltage changes in the nodes and transformer active power losses change. To provide the minimum value of network active power loss the authors justify the conditions for optimal connection of the source of distributed generation and value of its power. uk Інститут технічних проблем магнетизму НАН України Електротехніка і електромеханіка Електричні станції, мережі і системи Обґрунтування оптимального місця підключення джерела розосередженого генерування та значення його потужності Justification of optimal location of connection of the distributed generation source and value of its power Article published earlier |
| spellingShingle | Обґрунтування оптимального місця підключення джерела розосередженого генерування та значення його потужності Кирик, В.В. Богомолова, О.С. Електричні станції, мережі і системи |
| title | Обґрунтування оптимального місця підключення джерела розосередженого генерування та значення його потужності |
| title_alt | Justification of optimal location of connection of the distributed generation source and value of its power |
| title_full | Обґрунтування оптимального місця підключення джерела розосередженого генерування та значення його потужності |
| title_fullStr | Обґрунтування оптимального місця підключення джерела розосередженого генерування та значення його потужності |
| title_full_unstemmed | Обґрунтування оптимального місця підключення джерела розосередженого генерування та значення його потужності |
| title_short | Обґрунтування оптимального місця підключення джерела розосередженого генерування та значення його потужності |
| title_sort | обґрунтування оптимального місця підключення джерела розосередженого генерування та значення його потужності |
| topic | Електричні станції, мережі і системи |
| topic_facet | Електричні станції, мережі і системи |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/159062 |
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