Automatic load sharing of distribution transformer for overload protection

Nebey, Abraham Hizkiel

doi:10.1186/s13104-019-4880-1

Cited by 11 publications

(9 citation statements)

References 19 publications

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“…• If the system voltages remain within the specified limits and selected in divergent emergency conditions [23]. • If equipment is overloaded such as transformers and cables.…”

Section: Discussionmentioning

confidence: 99%

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Power System Analysis of Seawater Desalination Plant in Algeria with Different Load Scenarios

Zeggai¹,

Benhamida²,

Bouddou³

2021

JESA

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The cost of electricity for the reverse osmosis desalination process is up to 50% of the cost per cubic meter of water produce. Currently, the reduction of energy consumption is the main objective of the research on reverse osmosis plants. This document presents a power system analysis of the seawater desalination plant in Algeria with different load scenarios with a power of 50 MW made available by the electricity company Sonelgaz and a distribution level of 220/11/0.69/0.4 kV and a 2 MW diesel generator at the 0.4 kV level. The objective of this study is to analyze and dimension a general distribution network of an industrial customer through the power flow with different load and contingency scenarios (full load, full load N-1, low load, emergency system) to know and control its optimal and flexible operation. In a second step, the dimensioning of different protective devices is planned through a short circuit analysis of this network in order to evaluate the performance of the system. The ETAP program is used to carry out our simulation of this industrial plant and the effectiveness of the results is proven by comparisons with real measurements for the power flow analysis on the one hand and on the other hand with the results obtained by the builder for the short circuit analysis.

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“…• If the system voltages remain within the specified limits and selected in divergent emergency conditions [23]. • If equipment is overloaded such as transformers and cables.…”

Section: Discussionmentioning

confidence: 99%

“…• Identify transformer tap settings [6]. Continuous and comprehensive analysis of an electrical system is required to assess the current state of the system and to evaluate the optional plans for system expansion.…”

Section: Introductionmentioning

confidence: 99%

Power System Analysis of Seawater Desalination Plant in Algeria with Different Load Scenarios

Zeggai¹,

Benhamida²,

Bouddou³

2021

JESA

View full text Add to dashboard Cite

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“…Controller system was designed to manage demand and available energy resources to reduce the power interruption due to the intermittent nature of energy sources. Fuzzy controller switches the load to available energy sources to satisfy the demand in 24 h. Thus, there is no need of battery and charge controller (Lü 2020;Chen et al 2020;Nebey 2020;Hailemariam et al 2015). Controller is important to efficiently manage the energy balance between the total generation and the total demand.…”

Section: Controller Systemmentioning

confidence: 99%

Design of optimal hybrid power system to provide reliable supply to rural areas of Ethiopia using MATLAB and Homer

Nebey

2021

Renewables

Self Cite

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Integrating different energy resources, like solar PV, wind, and hydro is used to ensure reliable power to the rural community loads. Hybrid power system offers sufficient power supply for the rural villages by providing alternative supply for intermittent nature of renewable energy resource. Hence, intermittency of renewable energy resources is a challenge to electrify the rural community in a sustainable manner with the above sources. Thus, efficient resources management is a reasonable choice for intermittent renewable energy resources. The majority of rural villages in Ethiopia are suffering from lack of electricity. This causes deforestation, travel for long distance to fetch water, and no good social services, like clinic and schools, sufficiently. Therefore, the objective of this study was to maximize reliability of power supply by renewable energy sources. Data on wind speed and solar radiation are obtained from the NASA surface meteorological agency. While hydro data are obtained from physical measurements. Different configuration options are considered by Homer software to find the optimal configuration of hybrid system. The optimal configuration system is selected and hybrid components are sized. The optimal hybrid system consists of solar PV, wind, and hydro to supply a community load with a share of 13%, 52%, and 35% respectively. The fuzzy logic controller is designed to manage the intermittent nature of energies. Hence, the demand and energy sources are unpredictable; intelligent control system is important to manage the system accordingly. The control system is designed in MATALAB software. The result obtained from resource combination shows demand and supply are balanced. From the Twelve probabilistic combinations of demand and energy sources, one of the combinations shows that when 7.5 kW is demanded, the power generated/output from hybrid system is 10 kW which is greater than demand. To satisfy 7.5 kW demand control system takes 4.25 kW, 2.75 kW, and 1.08 kW share from wind, hydro, and solar sources respectively. The fuzzy logic control system is designed, to monitor the resource availability and load demand. This controller was managing the demand and the available resources according to the rule.

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“…The government and community have controversial feedbacks regarding the problem. According to some people it is due to rapid growth of country and some contend that it has to do with failure of aged and transmission and distribution lines of power transformers (Nebey, 2020). Losses of the power system are also increased by the occurrence of faults, so faults should be removed at the earliest and corrective measures for example to isolate the fault must be considered.…”

Section: Introductionmentioning

confidence: 99%

“…This issue is solved by linking another transformer by relay in parallel with the main transformer (Nebey, 2020). The PLC is designed to verify the overloading of the first transformer and, if this condition occurs, the second transformer is automatically connected parallel to the first transformer and the load is shared.…”

Section: Introductionmentioning

confidence: 99%

PLC Based Load Sharing of Transformers

Rana

Murtaza

Channar

et al. 2021

ijeeit

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The transformer is very expensive and bulky power system equipment. It runs and feed the load for 24 hours a day. Sometimes the load on the transformer unexpectedly rises above its rated capacity in that situation the load on the transformer increases and it will be overloaded and current will increase and cause overheating which in results damage the insulation of transformer. That insulation failure resulting in interruption of power supply. The common problems which transformer face is overloading voltage fluctuations and heating effect. It takes lot of time to fix the transformer so that a device need to be introduced a device which would help in automatically sharing of these over voltages. We will try to build an automated transformer sharing system in this project where the transformer current is confined to auxiliary transformer and automatically enters system. There are three transformers working as sources in this project, initially when the main switched ON the load that time load will be shared through the first transformer but when the load on first transformer suddenly increase above its reference value then immediately second transformer connected parallel with first transformer automatically through PLC by busing relay circuit.

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Automatic load sharing of distribution transformer for overload protection

Cited by 11 publications

References 19 publications

Power System Analysis of Seawater Desalination Plant in Algeria with Different Load Scenarios

Power System Analysis of Seawater Desalination Plant in Algeria with Different Load Scenarios

Design of optimal hybrid power system to provide reliable supply to rural areas of Ethiopia using MATLAB and Homer

PLC Based Load Sharing of Transformers

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