scholarly journals SIMULASI PELIMPAHAN BEBAN SISTEM PMT KOPEL TO KOPEL PADA SAAT PEMELIHARAAN TRAFO BERBASIS ARDUINO MEGA 2560 MENGGUNAKAN VT SCADA 11.2

2019 ◽  
Vol 20 (3) ◽  
pp. 74
Author(s):  
Muhammad Rizki Samputro ◽  
Arkhan Subari
Keyword(s):  
Load Transfer ◽  
Electrical Energy ◽  
Voltage Regulation ◽  
Current Transformer ◽  
Simulation Tool ◽  
Voltage Difference ◽  
Coupling System ◽  
Tap Changer ◽  
Transformer Sensor ◽  
Sensor Voltage

Mochammad Rizki Samputro, Arkhan Subari in this paper explains that the need for electricity in everyday life demands PT. PLN to always maintain the distribution of electrical energy to customers. Therefore, it is necessary to use a strategy to prevent blackouts if the transformer is being maintained, that is by maneuvering the load through the network or by using a 20 KV coupling system. The 20 KV Coupling System consists of PMT Kopel Transformer 1 and PMT Kopel Transformer 2 or often called PMT Kopel to Kopel. In this research, a Kopel to Kopel PMT simulation tool is used to transfer transformer loads during maintenance using a LY2N DPDT 12 V relay, ZMCT103C current transformer sensor, voltage sensor, tap changer and use Arduino Mega 2560 as a delivery choice change. After the experiment, the total current size of transformer 1 and transformer 2 exceeds the capacity of transformer which is 4.29 A and the voltage difference is 0.71 V (5.9 %). Therefore it is necessary to adjust the current and voltage regulation so that it becomes 2.82 A and 0.06 V (0.5 %). After that the transfer of load Transformer 2 to Transformer 1 using PMT Kopel to Kopel can be done. The load transfer is done by entering the PMT Kopel 1 and PMT Kopel 2 simultaneously and the Incoming 2 PMT is released. For the normalization, PMT Incoming 2 is entered and PMT Kopel 1 and Kopel 2 are released simultaneously.

scholarly journals Accurate Assessment of Decoupled OLTC Transformers to Optimize the Operation of Low-Voltage Networks

Energies ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 2173
Author(s):  
Álvaro Rodríguez del Nozal ◽  
Esther Romero-Ramos ◽  
Ángel Luis Trigo-García
Keyword(s):  
Distributed Generation ◽  
Optimization Problem ◽  
Low Voltage ◽  
Optimal Solution ◽  
Distribution Networks ◽  
Voltage Regulation ◽  
Rigorous Approach ◽  
Tap Changer ◽  
Load Tap Changer ◽  
Active Distribution Networks

Voltage control in active distribution networks must adapt to the unbalanced nature of most of these systems, and this requirement becomes even more apparent at low voltage levels. The use of transformers with on-load tap changers is gaining popularity, and those that allow different tap positions for each of the three phases of the transformer are the most promising. This work tackles the exact approach to the voltage optimization problem of active low-voltage networks when transformers with on-load tap changers are available. A very rigorous approach to the electrical model of all the involved components is used, and common approaches proposed in the literature are avoided. The main aim of the paper is twofold: to demonstrate the importance of being very rigorous in the electrical modeling of all the components to operate in a secure and effective way and to show the greater effectiveness of the decoupled on-load tap changer over the usual on-load tap changer in the voltage regulation problem. A low-voltage benchmark network under different load and distributed generation scenarios is tested with the proposed exact optimal solution to demonstrate its feasibility.

scholarly journals Structure of many-level adaptive automatic voltage regulation system

2020 ◽  
Vol 178 ◽  
pp. 01068
Author(s):  
I.O. Golikov ◽  
A.V. Vinogradov ◽  
V.E. Bolshev ◽  
A.V. Vinogradova ◽  
M. Jasinski ◽  
...  
Keyword(s):  
Voltage Regulation ◽  
Electrical Network ◽  
Regulation System ◽  
Processing Unit ◽  
Electrical Networks ◽  
Structural Diagram ◽  
Voltage Level ◽  
Voltage Change ◽  
Tap Changer ◽  
Load Tap Changer

This article describes the features of voltage regulation in electrical networks of 35, 110, 220 kV. The structural diagram of the 35/10/0.4 kV network is presented. The paper also describes the adaptive automatic voltage regulation system which allows regulating the voltage taking into account the actual voltage values at the consumers’ inputs. The structural diagram of the adaptive automatic voltage regulation system in the 0.4 kV electrical network using a boost transformer as an additional means of voltage regulation is given. The system is based on voltage sensors installed in different parts of an eletcrical network sending information on voltage values to to the processing unit which generates a signal for voltage regulating supplied to the executive device and the working body whuch, in turn, change the on-load tap-changer position of a transformer. The paper justifies the need for the enhancement of the adaptive automatic voltage regulation system for different voltage classes wich allows controlling a voltage change at different power supply system levels and regulating voltage level in accordance with this change. For this problem the multi-level adaptive automatic voltage regulation systemis proposed. The system allows regulating the voltage not only in the 0.4 kV network but also in networks of higher voltage classes. The proposed system can be integrated into the structure of intelligent electrical networks.

scholarly journals A Real Distribution Network Voltage Regulation Incorporating Auto-Tap-Changer Pole Transformer Multiobjective Optimization

2019 ◽  
Vol 9 (14) ◽  
pp. 2813 ◽  
Author(s):  
Sayed Mir Shah Danish ◽  
Ryuto Shigenobu ◽  
Mitsunaga Kinjo ◽  
Paras Mandal ◽  
Narayanan Krishna ◽  
...  
Keyword(s):  
Multiobjective Optimization ◽  
Power Systems ◽  
Distribution System ◽  
Distribution Systems ◽  
Voltage Regulation ◽  
Power Transfer ◽  
Dimensional Solution ◽  
Protection Measures ◽  
Transfer Capability ◽  
Tap Changer

A number of studies realized operation of power systems are unstable in developing countries due to misconfiguration of distribution systems, limited power transfer capability, inconsistency of renewable resources integration, paucity of control and protection measures, timeworn technologies, and disproportionately topology. This study underlines an Afghanistan case study with 40% power losses that is mainly pertinent from old distribution systems. The long length of distribution systems, low-power transfer capability, insufficient control and protection strategy, peak-demand elimination, and unstable operation (low energy quality and excessive voltage deviations) are perceived pre-eminent challenges of Afghanistan distribution systems. Some attainable solutions that fit challenges are remodeling (network reduction), networks reinforcement, optimum compensation strategy, reconfiguration options, improving, and transfer capability. This paper attempts to propose a viable solution using multiobjective optimization method of auto-tap-changer pole transformer (ATCTr). The proposed methodology in terms of optimal numbers and placement of ATCTr can be known as a novel two-dimensional solution. For this purpose, a real case of Kabul City distribution system is evaluated. Simulation results indicate the effectiveness of the proposed method in reducing system losses and improving system overall performance. This approach tends to regulate the voltage deviation in a proper and statutory range with minimum number and optimum placement of ATCTrs. The proposed method is simulated using MATLAB® environment to compare and evaluate performance of the proposed network under different situations and scenarios.

scholarly journals The Characterization of Thermoelectric Generator in Utilizing the Heat Waste of the Biomass Egg Drying Machine

2020 ◽  
Vol 3 (1) ◽  
pp. 30-33
Author(s):  
Sudarmanto Jayanegara ◽  
Zuryati Djafar ◽  
Zulkifli Djafar ◽  
Nasaruddin Azis ◽  
Wahyu Haryadi Piarah
Keyword(s):  
Heat Exchanger ◽  
Rice Husk ◽  
Temperature Difference ◽  
Thermoelectric Generator ◽  
Electrical Energy ◽  
Voltage Difference ◽  
Furnace Fuel

This research was conducted to determine the character of the TEG module as a source of electrical energy in utilizing heat in the chimney wall of an egg rack drying machine that uses rice husk as engine furnace fuel. The test is carried out by utilizing heat on 2 pieces of chimney (upper chimney and lower chimney) separated by a Heat Exchanger (HE) with a furnace blower speed of 2600 rpm and environmental blower speed of 2800 rpm with the amount of thermoelectric used as many as 44 units. The results show that the TEG module in the upper chimney obtained temperature difference (∆T), voltage difference (∆V) and power (P) respectively ∆T 38.75 ° C; ∆V 3.68 Volts; P 0.796 Watt and for the lower chimney respectively ∆T 73.25 ° C; ∆V 12.26 Volts; P 2.446 Watt.

scholarly journals Power Generation and Voltage Regulation of 132KV Karbala Grid using DFIG Wind Turbine Generator

2015 ◽  
Vol 16 (1) ◽  
pp. 19
Author(s):  
Qasim Kamil Mohsin ◽  
Xiangning Lin ◽  
Owolabi Sunday ◽  
Asad Waqar
Keyword(s):  
Transmission Line ◽  
Wind Turbine ◽  
Wind Farm ◽  
Reactive Power ◽  
Electrical Energy ◽  
Clean Energy ◽  
Voltage Regulation ◽  
Turbine Generators ◽  
Increasing Demand ◽  
And Control

Due to increasing demand on electrical energy in Iraq and to have clean energy that is environmental friendly, wind energy would be one of the most important and promising sources of renewable energy to achieve this goal. This paper discussed the reasons to use the Doubly-Feed Induction Generator (DFIG) amongst the available types of wind turbine generators, and in section (4) illustrate Motivations to select place to the wind farm construction. using decupling method (the vector control strategy) to change reactive power of DFIG 2MW connected to middle of the 132KV transmission line (Karbala north – Alahkader) without effect about the active power generated from DFIG itself with fixed wind speed value assumed to provide the voltage regulation, and control of the transmission line In addition to power generating. By using PSCAD/EMTDC, different simulation results are presented based on various scenarios.

scholarly journals Analysis of the number of switches of on-load tap changer of a power transformer for field substation, taking into account discrete time and voltage level sampling

2020 ◽  
Vol 220 ◽  
pp. 01056
Author(s):  
T.V. Tabachnikova ◽  
L.V. Shvetskova ◽  
A.V. Yumalin
Keyword(s):  
Smart Grids ◽  
Oil And Gas ◽  
Reactive Power ◽  
Power Transformer ◽  
Voltage Regulation ◽  
Electrical Network ◽  
Universal Method ◽  
Voltage Level ◽  
Tap Changer ◽  
Load Tap Changer

The introduction of “smart grids” technologies poses the problems of multi-criteria determination of the optimum voltage in the main substation of the object under study. In this study the busbar sections of the field substation of the oil and gas company is considered as the main substation. This paper studies regulation of voltage level in an electrical network using on-load tap changer (OLTC) of a power transformer for field substation of an oil and gas enterprise. Considered are approaches for voltage regulation taking into account the development of smart grid technologies. The authors have developed a universal method for determining the optimal voltage level on the busbar sections of a field substation, which allows for selection of the optimum voltage in accordance with certain parameters: loss of active, reactive power, voltage, electricity consumption, specific consumption or efficiency factor of artificial oil lift. The actual daily graphs of consumption of active, reactive power and voltage level at one of the field substations of PJSC Tatneft were studied. The operation mode of on-load tap-changer drive of the field transformer was modeled, taking into account the calculated optimal values of voltage and the dead zone. The paper presents the results of study of automatic voltage regulation on busbar sections of a field substation, taking into account the constraints for tap changer switches of a power transformer.

scholarly journals Testing the Reliability of the Current Transformer System in Tackling the Illegal Use of Electrical Energy

2020 ◽  
Vol 7 (2) ◽  
pp. 99-107
Author(s):  
Moranain Mungkin ◽  
Habib Satria ◽  
Zulkifli Bahri ◽  
Ahmad Ridwan
Keyword(s):  
Electrical Energy ◽  
Current Transformer

Meningkatnya kebutuhan dan tarif  energi listrik membuat oknum masyarakat memilih untuk mengambil jalan pintas dengan malakukan pecurian secara ilegal listrik milik Negara. Hal tersebut sangat bertentangan dengan hukum dan sangat beresiko terjadinya konsleting listrik  yang dapat mengakibatkan kebakaran. Oleh sebab itu, dibutuhkan suatu alat untuk mencegah terjadinya pemakaian arus secara ilegal yang efektif tanpa harus melakukan pengukuran secara langsung ke konsumen. Untuk mendeteksi terjadinya pencurian listrik ilegal dilakukan dengan 2 cara yaitu physical detection methode dan customer consumption methode. Penelitian diperoleh bahwa pemasangan sederhana dengan pemanfaatan  transformator arus (current transformer) sangat membantu PLN dalam mencegah penggunaan arus listrik ilegal tanpa harus melakukan pengecekan langsung terhadap konsumen.  

scholarly journals Impact of the hybrid reactive power compensator on the power grid used a fuzzy PI regulator

2021 ◽  
Vol 12 (1) ◽  
pp. 170
Author(s):  
Abdelkader Rahmouni
Keyword(s):  
Energy Transport ◽  
Reactive Power ◽  
Electrical Energy ◽  
Voltage Regulation ◽  
Electrical Network ◽  
Electrical Networks ◽  
Pi Regulator ◽  
Voltage Distortion ◽  
The Face ◽  
Reactive Power Compensator

The work presented in this article is a contribution to the problem of controlling reactive powers and voltages in an electrical network. Among these control tools, the static reactive power compensator (SVC) was chosen because of its simplicity of control. SVC is one of the Alternative Flexible Current Transmission Systems (FACTS) devices which help to solve the problems encountered in the operation of electrical networks, either on the distribution side or on the transport side. To increase its compensation efficiency in the face of harmonic currents which cause voltage distortion, we have introduced a three-phase harmonic filter. This new hybrid SVC is used to control the reactive power, the voltage and in addition to reduce the voltage distortion and the correction of the power factor in the electrical energy transport network. In order to improve its efficiency, two voltage regulation systems have been chosen in the control system for this compensator, the fuzzy PI regulator and the PIP regulator.

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