CC BY
0
Khasanov M.
assistant Kurbanov A. assistant
Jizzakh Polytechnic Institute Uzbekistan
STUDY OF THE MAIN QUANTITIES CHARACTERIZING ELECTRICAL LOAD GRAPHS
Annotation. In this article, the quantities characterizing the electric load graphs were studied, through which the electrical quantities were analyzed using the demand coefficient, utilization coefficient, maximum coefficient and shape coefficient of industrial enterprises.
Key words: demand coefficient, utilization coefficient, maximum coefficient.
In the calculation and research of loads, the coefficients of load graphs describing the working mode of consumers in terms of power and time are used. Such coefficients are determined for private and group graphs and are denoted by lowercase k and capital K, respectively.
The demand coefficient refers to the group of consumers, and it is determined by the ratio of the accounting load to the nominal value of consumers [1]:
_ Px
KT .a - p
nom
Usage and maximum of coefficients expressions account if we take [2]:
P, P
K — o rt■__— - K • K
KT .a p p Kish.a KM.a
nom o' rt.
also
KT.r Kish.r ' KM.r
The values of the demand coefficients are determined by this expression based on experience in operating conditions for various groups of consumers in industrial enterprises:
P.
q
KT.a p
nom
Here, P q is the asset power received by the consumer group. Values of the demand coefficient for different groups of consumers and enterprises are given in references [3].
The utilization factor means the ratio of the average active power to the nominal power, and its amount is determined for the shift with the highest load:
/1
X kish.a ' Pi
k _ port. . K '
k • ^ ^ — . ish.
t) / i ish.a pn
Po'rt. _ 1
"ish.a ? isn.a p
Pn P XP.
1
Here, p n, P n are nominal active capacities of one or a group of consumers, respectively. The amount of P n is taken from the passports of consumers who work repeatedly for a short period of time [4].
P s, P s - respectively, the average active power of certain groups of consumers is determined according to the indicator of energy meters:
9
P - ^ P, —
po< rt. — ; o rt. +
t s 1 s
e a, E a - active electricity received by one or a group of consumers. T s - the time interval for the cycle.
The above relations can also be written for reactive power [5]:
n
q X 1 kish.r
k — ^o'rt. , _ Qo'rt. _ 1_
kish.r " kish.r — ^ — "
q. ; Qn
X qn
_ _3r
qo rt. _ i ; rt. _~jL
The average value of utilization coefficients for electricity consumers operating in different modes is presented in the data [6].
Determining the maximum and shape coefficients from the coefficients of the load graphs describing the operating mode in terms of power and time [7].
Maximum coefficient graph filling to the coefficient reverse has been quantity, which is [8]:
K„„ = — = = 1 - Qm
KT .a Po'rt. KT .r Qo'rt.
of this coefficient value t is loaded shift for is determined and group to consumers belongs to will be If the max power when you say accounting power acceptance to be done attention removable if [ 9,10],
¡^ _ Px
KM .a
P ,
* o rt.
So, the maximum coefficient y enti from the graph defined two the most main Amounts are calculated and average downloads between relationship
determines K m coefficient y enti accounting power average to power relatively how much size shows. His quantity together equal to or big to be can Immutable consumer goods (fans, pumps and tu.) for K m =1, i.e P x = P o r t.
Uniform coefficient don't download effective value his o ' average to the value of ratio with is determined. This pointer some iste ' mulchi or group consumers for known time in the interval found:
7 _ Po'rt.kv. —
kf .a — • KF. A —
P
o' rt.
o'rt .kv.
P,
o'rt.
k — ^ o'rt.kv. K _ Qo'rt.kv.
* " • KF.R —
'f r F
rt. ' Qo rt.
Form factor upload of the graph time according to unevenness shows. His the most small value, time according to variable in download, together equal to will be Average square upload the following expression through defined as [11]:
P
P(t)
CN
CL
ro
CL
tu
^ tn ^ ^ tto'x ^
o
CL
Figure 1. Download of the graph time according to unevenness.
P
o'rt.kv.
i
n I n
Yp? • t XP
~—1 "V
T
Q
o'rt.kv.
1
X Q2 • t,
T
1
X Q2
n
T
Download n — - here T time of the graph between equal to pieces the ti
number Form factor K fa of quantity work release process in the ceremony has been in enterprises between 1.05 and 1.15 will be
References:
1. Abror Q. Research and Analysis of Ferromagnetic Circuits of a Special Purpose Transformer //Fazliddin, A., Tuymurod, S., & Nosirovich, OO (2020). Use of Recovery Boilers At Gas-Turbine Installations Of Compressor Stations And
t
t
t
t
2
3
2
1
1
Thyristor Controls. The American Journal of Applied sciences. - 2020. - Т. 2. -№. 09. - С. 46-50.
2. Abror Q. Development of Magnetic Characteristics of Power Transformers //Fazliddin, A., Tuymurod, S., & Nosirovich, OO (2020). Use Of Recovery Boilers At Gas-Turbine Installations Of Compressor Stations And Thyristor Controls. The American Journal of Applied sciences. - 2020. - Т. 2. - №. 09. -С. 46-50.
3. Qurbonov A., Qurbonov A., Qurbonova B. OLIY TA'LIM MUASSALARIDA TALABALARNING INTELLEKTUAL KOMPETENTSIYALARINI RIVOJLANTIRISHNING PSIXOLOGIK JIHATLARI //Физико-технологического образование. - 2022. - №. 2.
4. Qurbonov A., Qurbonov A., Qurbonova B. MUHANDIS-ELEKTRIKLARNI KASBIY FAOLIYATGA TAYYORLASHDAGI BUGUNGI KUN TALABLAR //Физико-технологического образование. - 2022. - №. 2.
5. Abdinasir o'g'li Q. A. et al. SANOAT KORXONALARI ELEKTR TA'MINOTI TIZIMINI YAXSHILASH MAQSADIDA O 'RNATILADIGAN TRANSFORMATORLAR TANLOVI //E Conference Zone. - 2022. - С. 13-15.
6. Razzaqovich Q. A. et al. SANOAT KORXONALARI ELEKTR TA'MINOTIDA ELEKTR YUKLAMALARI KARTOGRAMMASINI QURISH VA BPP NING O 'RNATILISH JOYINI ANIQLASH //E Conference Zone. - 2022. - С. 358-361.
7. Kurbanov A., Kurbanova B., Kurbanov A. COMPOSITION OF STUDENTS'INTELLECTUAL COMPETENCES //INTERNATIONAL SCIENTIFIC CONFERENCE»SCIENTIFIC ADVANCES AND INNOVATIVE APPROACHES». - 2023. - Т. 1. - №. 4. - С. 33-40.
8. Qurbonov A., Qurbonova B. RADIATSIYANING ODAMLARGA TA'SIRI //Физико-технологического образование. - 2022. - №. 5.
9. Qurbonov A., Qurbonova B. INSON VA UNING HAYOTIDA RADIATSIYANING TUTGAN O'RNI //Физико-технологического образование. - 2021. - Т. 4. - №. 4.
10. Barno K. ELECTRONIC ELEMENTS IN THE USE OF SOLAR ENERGY //International journal of scientific researchers (IJSR) INDEXING. - 2024. - Т. 5. - №. 2. - С. 343-347.
11. Barno K. ANALYSIS OF SOLAR THERMAL AND PHOTOVOLTAIC SYSTEMS //Yangi O'zbekiston taraqqiyotida tadqiqotlarni o'rni va rivojlanish omillari. - 2024. - Т. 7. - №. 3. - С. 249-258.
