scholarly journals Analisa Pemerataan Beban Antar Fasa Di Saluran Tegangan Rendah (SUTR) Pada Transformator Distribusi 50 KVA - Li 146 Wilayah Kerja PT PLN (Persero) Rayon Muara Beliti

2019 ◽  
Vol 4 (1) ◽  
Author(s):  
Dian Eka Putra ◽  
Randi Kusniriansya
Keyword(s):  
Low Voltage ◽  
Neutral Current ◽  
Electrical Power ◽  
Distribution Channel ◽  
Power Losses ◽  
Neutral Currents ◽  
Distribution Transformer ◽  
Load Imbalance ◽  
Before And After ◽  
Large Phase

ABSTRAKKetidak seimbangan beban yang terjadi SUTR terletak etidakteraturan pemasangan sambungan rumah (SR) baik satu fasa maupun tiga fasa pada saluran udara tegangan rendah mengakibatkan beban trasformator distribusi LI 146 menjadi tidak merata, hal ini dikarenakan adanya penumpukan beban pada salah satu fasa, sehingga beban saluran tidak seimbang. Ketidakseimbangan beban menyebabkan menyebabkan terjadinya lossesdaya listrik pada jaringan penghantar netral.Diawali dengan pengukuran setiap fasa SUTR maka didapat lapangan fasa R yang terbesar dengan Arus 41 Amperedan fasa T Arus terkecil sebesar 12.2 A, akibat dari perbedaan yang besar antar fasa minimbulakan arus sebesar 35,5 A. Maka diperlukananalisa perbaikan dilapangan untuk mengurangi besarnya arus netral dan loses yang terjadi maka dilakukan pemerataan beban dengan jalan perbaikan sambungan konduktordan pemindahan disetiap penghantar fasa pada beban berupa sambungan rumah (SR) dan beban lainya lampu penerangan jalan, dari jaringan fasa yang besar ke penghantar fasa yang lebih kecil.penelitian inididapatnilai besar arus netral dan rugi-rugi (losses)penghantar netral sebelum dan setelah dilakukan pemerataan beban saluran udara tegangan rendah (SUTR). Pengukuran dan perhitungan dilakukan pada luar waktu beban puncaktransformator distribusi pada gardu distribusi LI 146 di PT PLN (Persero) ULP Muara Beliti.Berdasarkan hasil perhitungan besar arus netral sebelum dilakukan pemerataan beban yaitu 35,5 A dan rugi-rugi yang terjadi akibat arus netral sebesar 2,265 kW. Namun setelah dilakukan pemerataan beban, besar arus netral berkurang menjadi 24,2 Adikarenakan arus netral berkurang maka rugi-rugi pada penghantar netral ikut berkurang menjadi 0,97 kW. Hal ini berarti bahwa program pemerataan beban dapat meminimalisir besar arus dan rugi-rugi daya (losses) yang timbul disaluran penghantar netral transformator distribusi LI 146.Kata kunci : Ketidakseimbangan beban, Transformator LI 146, Pemerataan beban saluran.ABSTRACThe load imbalance that occurs in SUTR lies in the irregularity of the installation of house connections (SR) both one phase and three phases in the low voltage air ducts causing the distribution load transformer LI 146 to be uneven, this is due to a buildup of load on one phase, so that the load is not balanced. The unbalance of load causes electrical power losses in the neutral conductor network. Beginning with the measurement of each phase of the SUTR, the largest phase R is obtained with a current of 41 Amperedan and T phase The smallest current of 12.2 A, due to a large difference between the phase minimbulakan currents of 35.5 A. Therefore, it is necessary to analyze the improvement in the field to reduce the amount of neutral current and loses that occur then the load equalization is carried out by repairing conductor connections and displacement in each phase conductor at loads in the form of house connections (SR) and other loads of street lighting, from large phase networks to conductors smaller phase. this research can be a large value of neutral current and neutral conductor losses before and after the equalization of low voltage air line loads (SUTR). Measurements and calculations are carried out outside the load time of the distribution transformer at the LI 146 distribution substation at PT PLN (Persero) ULP Muara Beliti. Based on the results of the calculation of neutral currents before equalization of the load ie 35.5 A and the losses incurred due to neutral currents of 2,265 kW. However, after the load is equalized, the neutral current is reduced to 24.2 Adik. Since the neutral current is reduced, the losses on neutral conductors also decrease to 0.97 kW. This means that the load equalization program can minimize the amount of current and power losses that arise in the distribution channel neutral distribution transformer LI 146.Keyword :  Load imbalance, Transformer LI 146, Channel load equalization

scholarly journals PEMERATAAN BEBAN PADA GARDU KD 056 PENYULANG TABANAN PT PLN (PERSERO) DISTRIBUSI BALI AREA BALI SELATAN

2018 ◽  
Vol 5 (1) ◽  
pp. 82
Author(s):  
I Putu Agus Semara Putra ◽  
I Ketut Wijaya ◽  
I Made Mataram
Keyword(s):  
Load Balancing ◽  
Power Distribution ◽  
Distribution System ◽  
Low Voltage ◽  
Voltage Drop ◽  
Peak Load ◽  
Simulation Software ◽  
Neutral Currents ◽  
Power Distribution System ◽  
Load Imbalance

Load balancing is a routine done by PLN to manage a distribution substation. It is done on Peak Load Time (WBP) only. Initial load measurements and load data on a distribution transformer need to be done for balancing as input of simulation software. The load imbalance in a power distribution system is due to an imbalance in single phase loads in the R, S and T phases in low voltage networks due to the imbalance of the load the current in the neutral transformer arises. The current flowing in the neutral of the transformer causes losses, i.e. losses due to neutral currents in the neutral conductor of transformers and losses due to neutral currents flowing to the ground. In this research load equalization in substation KD 056 was done by making a simulation on the ETAP program by measuring the value of the voltage on the KD 056 substation. The result of load balancing in KD 056 substation with the simulation ETAP program i.e. the voltage drop obtained from the percentage of KD 056 substation after being balanced by voltage drop on phase R which decreased from 7.30% to 1.36% from the 219VA source voltage. Once the KD 056 substation is balanced, it can lower the voltage drop and power losses, thus the system voltage meets the standards of PLN.

scholarly journals ANALISIS BEBAN TAKSEIMBANG TERHADAP RUGI-RUGI DAYA DAN EFISIENSI TRANSFORMATOR KL0005 JARINGAN DISTRIBUSI SEKUNDER PADA PENYULANG KLUNGKUNG

2018 ◽  
Vol 5 (2) ◽  
pp. 310
Author(s):  
I Putu Gede Kartika ◽  
I Ketut Wijaya ◽  
I Made Mataram
Keyword(s):  
Power Loss ◽  
Low Voltage ◽  
Voltage Drop ◽  
Distribution Network ◽  
Power Losses ◽  
Network Systems ◽  
Loss Analysis ◽  
Load Imbalance ◽  
Unbalanced Load ◽  
Secondary Distribution

Load imbalance will always occur in low voltage network systems (JTR), this is due to the uneven use of one phase load on customers coming from household elektrical appliances. The uneven use of loads will cause power losses in the network and drop in voltage. Load equalization on the network is one way to reduce power losses and voltage drop. This research was conducted by analyzing power losses and unbalanced load voltage drop and balanced load on the KL0005 transformer secondary distribution network on the Klungkung Feeder. Based on the result of the analysis, the power losses in the unbalanced load state obtained a result of 3.029 kW and the voltage drop in phase R was 6,1%, phase S was 3,5% and phase T was 0%, while the result of the power loss analysis balanced load obtained 2,9 kW and voltage drop in phase R is 2,6%, phasa S is 1,3% and phase T is 3% with difference in balanced load efficiency and unbalance load of 0,1%.

scholarly journals PENGARUH PENYEIMBANGAN BEBAN TRAFO DISTRIBUSI TERHADAP ARUS NETRAL

2013 ◽  
Vol 5 (1) ◽  
pp. 1-8
Author(s):  
Surfa Yondri ◽  
Tri Artono ◽  
Hengki Purnama Sari
Keyword(s):  
Load Balancing ◽  
Phase Distribution ◽  
Neutral Current ◽  
Current Transformer ◽  
S Phase ◽  
Neutral Currents ◽  
Distribution Transformer ◽  
Distribution Transformers ◽  
Transformer Substation ◽  
Average Current

Load balancing is load balancing activities in each phase distribution transformers are not balanced, the goal to reduce the magnitude of the neutral current transformer because inequality between phases. This activity was done by measuring each phase transformer load, calculate the average current in each phase, and shifted the burden of heavily loaded phase to phase which has a lot fewer burdens. Load balancing is done on a regular basis every 6 months. PT. PLN (Persero) Rayon Bukittinggi perform load balancing on the distribution transformer substation 100 KVA Distribution Tabek Gadang Tower 2 times on Wednesday, 15th May 2013 at 19:30 pm and Thursday, 16 May 2013 at 19:30 pm. First, by moving the load phase T to phase S at 18 A. Second, by moving the burden from phase to phase R T at 9 A. and load phase T to S phase by 11 A. load balancing distribution transformers 100 KVA Substation Tabek Gadang Tower is near parity with the transformer neutral currents in 14.18 A.

scholarly journals Analysis of the Increase of Transformer Power Losses due to the Operation of Unbalanced Nonlinier Loads

2018 ◽  
Vol 2 (2) ◽  
pp. 38
Author(s):  
I Wayan Rinas ◽  
I Made Suartika ◽  
Anak Agung Maharta Pemayun
Keyword(s):  
Electrical Power ◽  
Harmonic Distortion ◽  
Power Losses ◽  
Loss Analysis ◽  
Before And After ◽  
Transformer Power ◽  
Quality Of Electric Power ◽  
High Level ◽  
The Impact

Non-linear loads are the source of harmonic current for electric utilities. The high level of harmonics greatly affects the increase of losses of electrical power (losses). The quality of electric power is determined by the parameters of power losses that occur in the transformer due to harmonic distortion. In this research will be analyzed THD from result of measurement and simulation in accordance with IEEE 519-2014 standard, power loss analysis on transformer before and after. Harmonics, the impact is increased due to unbalanced linear currents.

ANALYSIS OF POWER LOSSES IN PHASES IN DISTRIBUTION NETWORKS AT LOAD IMBALANCE

2020 ◽  
Vol 1 (6(75)) ◽  
pp. 65-70
Author(s):  
Kakhraman Rakhimovich Allaev ◽  
Gulasalkhon Foziljon kizi Musinova
Keyword(s):  
Power System ◽  
Power Quality ◽  
Low Voltage ◽  
Distribution Networks ◽  
Power Losses ◽  
Significant Excess ◽  
Load Imbalance ◽  
The Asymmetry

In this paper is being presented the problem of power quality in low voltage networks. Also is being considered the estimation of additional power losses caused by the asymmetry of the load in phases in distribution networks. The load imbalance in phases leads to a significant irrational increase in power losses in the power system. Therefore, special attention should be paid to the correct phasing of loads, in order to prevent significant imbalance, in order to prevent, among other things, significant excess losses in the systems.

scholarly journals Analisis Terjadinya Arus Netral Pada Trafo Distribusi 160 kVA

2021 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
Arfita Yuana Dewi ◽  
Asnal Effendi ◽  
Fahody M Syafar
Keyword(s):  
Power Distribution ◽  
Neutral Current ◽  
S Phase ◽  
Phase System ◽  
Power Losses ◽  
Distribution Transformer ◽  
Cross Sectional ◽  
Cross Sectional Size ◽  
The Wire ◽  
Current Flows

The Power distribution in a 3-phase system, cannot be separated from the flow of current in the neutral of the transformer, which will cause power losses (losses) where current flows into the neutral conductor and losses that flow into the neutral conductor. This study was conducted to determine the causes and magnitude of power losses that occur due to the occurrence of neutral current flowing in the neutral conductor in a 160kVA distribution transformer. The research location taken is the Distribution Transformer (G187 T) which is located on Jl. Hos Cokroaminoto Wisma Ombilin where load imbalances often occur. From the results, it can be seen that if the neutral wire has a cross-sectional size of 50 mm2, the current that passes through the neutral wire is 6.4% for the day and for the cross-sectional size of the wire is 70 mm2, it can reduce the power flowing to the neutral by a percentage of 4.77%. for the daytime. Efficiency value that occurs is greater at night that is 94.87% while for the day it is 93.44%. For the distribution of each - each phase, especially the S phase, so that it can be balanced because the power supplied to the S phase is too small. We recommend that the current flowing in the neutral wire must be channeled to the ground so that the current flowing in the neutral wire becomes zero.

REDUCTION OF ACTIVE POWER LOSSES IN LOW VOLTAGE NETWORKS WITH THE RECTIFIER LOAD

2017 ◽  
Vol 2017 (3) ◽  
pp. 65-70
Author(s):  
A.F. Zharkin ◽  
◽  
V.A. Novskyi ◽  
N.N. Kaplychnyi ◽  
A.V. Kozlov ◽  
...  
Keyword(s):  
Low Voltage ◽  
Active Power ◽  
Power Losses ◽  
Active Power Losses

scholarly journals Dynamic grid fault analysis in wind power plant with DFIG by using supervisory control and data acquisition (SCADA) viewer

2020 ◽  
Vol 181 ◽  
pp. 03006
Author(s):  
Nduwamungu Aphrodis ◽  
Ntagwirumugara Etienne ◽  
Utetiwabo Wellars ◽  
Mulolani Francis
Keyword(s):  
Power Systems ◽  
Power Flow ◽  
Control Strategies ◽  
Electrical Power ◽  
Fault Analysis ◽  
Operational Mode ◽  
Electrical Power Systems ◽  
Fault Ride Through ◽  
Before And After ◽  
Clearing Time

Faults in electrical power systems are among the key factors and sources to network disturbances, however control strategies are among key faults clearing techniques for the sake of safe operational mode of the system.Some researchers have shown various limitations of control strategies such as slow dynamic response,inability to switch Off and On network remotely and fault clearing time. For a system with wind energy technologies, if the power flow of a wind turbine is interrupted by a fault, the intermediate-circuit voltage between the machine-side converter and line-side converter will fall in unacceptably high values.To overcome the aforementioned issues, this paper used a Matlab simulations and experiments in order to analyze and validate the results.The results showed that fault ride through (FRT) with SCADA Viewer software are more adaptable to the variations of voltage and wind speed in order to avoid loss of synchronism. Therefore at the speed of 12.5m/s a wind produced a rated power of 750W and remained in synchronization before and after a fault created and cleared but worked as generator meanwhile at speed of 3.4m/s wind disconnected from grid and started working as a motor and consumed active power (P=-25watts) and voltage dip at 100% .For the protection purpose, the DC chopper and crowbar should be integrated towards management of excess energy during faults cases.

scholarly journals Extended Use for the Frequency Response Analysis: Switching Impulse Voltage Based Preliminary Diagnosis of Potential Sources of Partial Discharges in Transformer

2020 ◽  
Vol 10 (22) ◽  
pp. 8283
Author(s):  
Kamalaselvan Arunachalam ◽  
Balasubramanian Madanmohan ◽  
Rajesh Rajamani ◽  
Natarajan Prabaharan ◽  
Hassan Haes Alhelou ◽  
...  
Keyword(s):  
Frequency Response ◽  
Low Voltage ◽  
Partial Discharges ◽  
Response Analysis ◽  
Frequency Response Analysis ◽  
Potential Sources ◽  
Impulse Voltage ◽  
Before And After ◽  
Test Voltage ◽  
Low Capacitance

The Frequency Response Analysis approach (FRA) is useful in the fault diagnosis of transformers. However, its usefulness in diagnosing any potential sources of Partial Discharge (PD) in transformers has not been thoroughly investigated so far. In this work, the use of Impulse voltage-based FRA (IFRA) in diagnosing inter-turn shorts and potential sources of PD were investigated on a 315 kVA, 11 kV/433 V transformer. Inter-turn shorts and PD sources were emulated and the usefulness of IFRA in their diagnosis was investigated while using switching impulse voltage at different magnitude levels as the test signals. For emulating the inter-turn shorts and the PDs, special tappings were provided on one of the 11 kV windings through the low capacitance bushings. Low voltage impulse was successful in diagnosing the inter-turn shorts, but unsuccessful in identifying the sources of PDs. During the test condition, the test voltage was adjusted with the presence of artificially created PD sources. The frequency response of the transformer before and after the inception of PD was observed and analyzed in this article. The FRA results demonstrated that the switching impulse voltage based IFRA approach at moderate voltages could be useful in diagnosing the presence of the potential sources of PDs.

Sign in / Sign up

Export Citation Format

Share Document