scholarly journals ANALISIS PENGATURAN POSISI TAP ON LOAD TAP CHANGER PADA TRANSFORMATOR DAYA 30 MVA 70/20 KV DI GI MAULAFA

2019 ◽  
pp. 121-128
Author(s):  
Agusthinus S. Sampeallo ◽  
Wellem F. Galla ◽  
Darius M. K. Jala
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Voltage Drop ◽  
Electrical Power ◽  
Peak Load ◽  
Voltage Range ◽  
Power Distribution System ◽  
Secondary Voltage ◽  
Tap Changer ◽  
Load Tap Changer

ABSTRACT The Maulafa substation is a sub-system in the electrical power distribution system in the city of Kupang, has two transformers of 30 MVA 70/20 kV each equipped with OLTC. OLTC installation aims to obtain a stable secondary voltage value despite the voltage drop on the primary side, this is because the tap changer works by changing the coil ratio in a transformer. The results of calculations and analyzes performed on transformer 1 OLTC, tap position  is in position 9, with a voltage range of 20.94 kV at peak load, with a primary voltage of 69.12 kV. For the lowest load, it is in position 9 with a voltage range of 20.85 kV with a primary voltage of 68.81 kV. Whereas for transformer 2 the primary voltage is 69.08 kV for peak load and 68.91 kV for lowest load, being in position 2 for peak load and position 1 for lowest load, with a range of voltage of 21.19 kV and 20 respectively. 88 kV. The OLTC tap position of transformer 1 can still be reduced to position 6 with a voltage range of 20.21 kV for peak loads and 20.11 kV for the lowest loads. Both transformers have the same loading, both peak load and lowest load of 26 MW for peak load and 15 MW for lowest load.    ABSTRAK Gardu Induk Maulafa merupakan sub sitstem dalam sistem penyaluran daya listrik yang ada di Kota Kupang, memiliki dua buah transformator masing-masing 30 MVA 70/20 kV yang dilengkapi dengan OLTC. Pemasangan OLTC yang bertujuan untuk mendapatkan nilai tegangan sekunder yang stabil meskipun terjadi drop tegangan pada sisi primer, hal ini dikarenakan tap changer bekerja dengan cara merubah perbandingan lilitan dalam sebuah transformator. Hasil perhitungan dan analisis yang dilakukan pada OLTC transformator 1, posisi tap  berada  pada posisi 9, dengan jangkauan tegangan 20,94 kV pada saat beban puncak, dengan tegangan primer sebesar 69,12 kV. Untuk beban terendah, berada pada posisi 9 dengan jangkauan tegangan sebesar  20,85 kV dengan tegangan primer sebesar 68,81 kV.  Sedangkan untuk transformator 2 tegangan primernya  sebesar 69,08 kV untuk beban puncak dan 68,91 kV untuk beban terendah, berada  pada posisi 2 untuk beban puncak  dan posisi 1 untuk beban terendah, dengan Jangkauan tegangan masing-masing  21,19 kV dan 20,88 kV.     Posisi tap OLTC transformator 1 masih bisa diturukan ke posisi 6 dengan jangkauan tegangan sebesar 20,21 kV untuk beban puncak dan 20,11 kV untuk beban terendah. Kedua transformator memiliki pembebanan yang sama, baik beban puncak maupun beban terendah yakni 26 MW untuk beban puncak dan 15 MW untuk beban terendah.   

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 Non-isolated load sharing direct current system operation with use of the auctioneering diodes

2019 ◽  
Vol 28 ◽  
pp. 01037 ◽  
Author(s):  
Maciej Kozak
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Heat Dissipation ◽  
Current System ◽  
Electrical Power ◽  
Experimental System ◽  
Laboratory System ◽  
Simulation Studies ◽  
Power Distribution System ◽  
Electrical Systems

The paper presents the background and results of numerical simulation and experimental research of a system using auctioneering diodes used to distribute the electrical power between two power converters connected with intermediate circuits in parallel, direct connection. Presented non-isolated power distribution system which utilizes blocking diodes placed in DC branches are used in the selected ship's electrical systems, however, they create problems related to control and handling ground faults. Another issue occurring during the operation of this type of systems is increased heat dissipation while diodes switching. Selected problems related to the operation of experimental system have been identified by means of simulation studies and experiments carried out in a 11 kVA laboratory system and the theoretical basis along with results are provided in the article.

scholarly journals FCM and Statistical Based Approach for Classification and Location of Faults in Electrical Distribution System

2011 ◽  
pp. 64-68
Author(s):  
Pratul Arvind ◽  
Rudra prakash Maheswari
Keyword(s):  
Expectation Maximization ◽  
Power Distribution ◽  
Distribution System ◽  
Fault Location ◽  
Electrical Power ◽  
Electrical Power System ◽  
Power Distribution System ◽  
Electric Power Distribution ◽  
Node Distribution ◽  
System Restoration

Electric Power Distribution System is a complex network of electrical power system. Also, large number of lines on a distribution system experiences regular faults which lead to high value of current. Speedy and precise fault location plays a pivotal role in accelerating system restoration which is a need of modern day. Unlike transmission system which involves a simple connection, distribution system has a very complicated structure thereby making it a herculean task to design the network for computational analysis. In this paper, the authors have simulated IEEE 13- node distribution system using PSCAD which is an unbalanced system and current samples are generated at the substation end. A Fuzzy c-mean (FCM) and statistical based approach has been used. Samples are transformed as clusters by use of FCM and fed to Expectation- Maximization (EM) algorithm for classifying and locating faults in an unbalanced distribution system. Further, it is to be kept in mind that the combination has not been used for the above purpose as per the literature available till date.

Game-Based Control Approach for Smart Grid

2014 ◽  
pp. 429-446
Keyword(s):  
Game Theory ◽  
Smart Grid ◽  
Power Distribution ◽  
Distribution System ◽  
Electrical Power ◽  
Power Distribution System ◽  
Control Approach ◽  
Smart Grid Communications ◽  
Electric Power Distribution ◽  
Network Communications

The concept of smart grid to transform the old power grid into a smart and intelligent electric power distribution system is, currently, a hot research topic. Smart grid offers the merging of electrical power engineering technologies with network communications. Game theory has featured as an interesting technique, adopted by many researchers, to establish effective smart grid communications. The use of game theory has offered solutions to various decision-making problems, ranging from distributed load management to micro storage management in smart grid. Interestingly, different researchers have different objectives or problem scopes for adopting game theory in smart grid. This chapter explores the game-based approach.

Design of Low-Voltage Power Distribution System

2013 ◽  
Vol 791-793 ◽  
pp. 1889-1891
Author(s):  
Yan Li Fan ◽  
Qing En Li
Keyword(s):  
Power System ◽  
Power Distribution ◽  
Distribution System ◽  
Low Voltage ◽  
Electrical Power ◽  
Scientific Basis ◽  
Voltage Distribution ◽  
Electrical Power System ◽  
Power Distribution System ◽  
High Rise

The low-voltage distribution system is the key component of the electrical power system. Some analysis and research of the low-voltage distribution system is carried out in this paper, which provides some scientific basis to design the low-voltage distribution system. Firstly, the summarize of low-voltage distribution system is taken. The influence to productions and livings of low-voltage distribution system is introduced. Secondly, the mode of connection and design philosophy of low-voltage distribution system is studied in detail, especially the high-rise buildings low-voltage distribution system is concluded and summarized.

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