scholarly journals Problems in Electric Systems Caused by Harmonics and Solution Proposals

2021 ◽  
Vol 6 (1) ◽  
pp. 137-141
Author(s):  
Kemal Metin ◽  
Huseyin Ceylan ◽  
Ertugrul Demirkesen ◽  
Kadir Canatan ◽  
Mikail Hizli
Keyword(s):  
Rapid Change ◽  
Electrical Energy ◽  
Energy System ◽  
Energy Losses ◽  
Additional Energy ◽  
Electrical Systems ◽  
Electrical Devices ◽  
The Stability ◽  
Day By Day

Together with globalization, factories, companies and even countries can survive by competing with their rivals. Nowadays, technological superiority is one of the most important factors determining competitive power. This situation causes the result of rapid change and development of technology. Due to improvement in technology, humanity dependence on electricity is increasing day by day. Many new devices get in our lives, and both the continuity and quality of electricity comes across as an important issue. Different researches are carried out to make the energy more qualified and efficient. In terms of the stability of the used electrical devices, it is important to keep the harmonic amount in electrical energy under a certain value. Besides this, these unwanted harmonics cause additional energy losses in the energy system and negatively affect energy efficiency, which is an economically important problem. In this exercise, the problems in electrical systems, the damages in electrical devices caused by harmonics have been researched and various solution suggestions have been developed for this problem.

Reliability of Power Electric Systems in Pemex Refining: Experiences and Realities

2014 ◽  
Author(s):  
Luis Ivan Ruiz Flores ◽  
Francisco Cuauhtémoc Poujol Galván
Keyword(s):  
Electrical Energy ◽  
Energy System ◽  
Operational Reliability ◽  
Gasoline Demand ◽  
Electrical Systems ◽  
Processing Plants ◽  
World Class ◽  
New Processing

In this paper, we present the experience of 10 years of collaboration between the Electric Research Institute and Pemex Refining to modernize the power electric systems of the National Refining System in Mexico, collaborating together to design an electrical energy system for distribution that can operate reliably at the increase in the quantity and quality of oil products with the integration of new processing plants. We present the extensive cooperation between the personnel involved and in contrast unexecuted planning to implement the solutions. Also, after a decade of collaboration, we present the different scenarios, factors and challenges in the medium and long term that will assure that the electrical systems are in healthier conditions to operate for the next years and will achieve the required reliability of the national refining system for gasoline demand, to result in an operational reliability conferring to a World Class utility practice.

scholarly journals Insight on Effectiveness of Frequently Exercised PQ Classification Techniques

2016 ◽  
Vol 6 (5) ◽  
pp. 2437
Author(s):  
BDevi Vighneshwari ◽  
R. Neela
Keyword(s):  
Energy System ◽  
Potential Effect ◽  
Green Energy ◽  
Consumer Market ◽  
Classification Techniques ◽  
Electrical Devices ◽  
Significant Research ◽  
Research Gap ◽  
Harmful Effects

<p>The growing demands of global consumer market in green energy system have opened the doors for many technologies as well as various sophisticated electrical devices for both commercial and domestic usage. However, with the increasing demands of energy and better quality of services, there is a significant increase in non-linearity in load distribution causing potential effect on the Power Quality (PQ). The harmful effects on PQ are various events e.g. sag, swell, harmonics etc that causes significant amount of system degradation. Therefore, this paper discusses various significant research techniques pertaining to the PQ disturbance classification system introduced by the authors in the past and analyzes its effectiveness scale in terms of research gap. The paper discusses some of the frequently exercised PQ classification techniques from the most relevant literatures in order to have more insights of the techniques.</p>

Insight on Effectiveness of Frequently Exercised PQ Classification Techniques

2016 ◽  
Vol 6 (5) ◽  
pp. 2437
Author(s):  
BDevi Vighneshwari ◽  
R. Neela
Keyword(s):  
Energy System ◽  
Potential Effect ◽  
Green Energy ◽  
Consumer Market ◽  
Classification Techniques ◽  
Electrical Devices ◽  
Significant Research ◽  
Research Gap ◽  
Harmful Effects

<p>The growing demands of global consumer market in green energy system have opened the doors for many technologies as well as various sophisticated electrical devices for both commercial and domestic usage. However, with the increasing demands of energy and better quality of services, there is a significant increase in non-linearity in load distribution causing potential effect on the Power Quality (PQ). The harmful effects on PQ are various events e.g. sag, swell, harmonics etc that causes significant amount of system degradation. Therefore, this paper discusses various significant research techniques pertaining to the PQ disturbance classification system introduced by the authors in the past and analyzes its effectiveness scale in terms of research gap. The paper discusses some of the frequently exercised PQ classification techniques from the most relevant literatures in order to have more insights of the techniques.</p>

scholarly journals Advances in Power and Energy Systems

TecnoLógicas ◽  
2018 ◽  
Vol 21 (42) ◽  
pp. 9-11
Author(s):  
Carlos A. Ramos-Paja ◽  
Daniel González-Montoya ◽  
Adriana Trejos-Grisales ◽  
Sergio I. Serna-Garcés
Keyword(s):  
Renewable Energy Sources ◽  
Life Time ◽  
Electrical Energy ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Electrical Systems ◽  
Research Fields ◽  
Power And Energy Systems ◽  
Power And Energy

Processing electrical energy is one of the most important research fields in our society. So far, tremendous efforts have been made to improve the efficiency of each step in electrical systems: generation systems have been enhanced by introducing renewable energy sources and new control systems for conventional generators, losses have been reduced, the power quality of distribution and transmission systems has been increased, the life-time and state-of-health of energy storage devices have been extended, and sections of the power grid have been isolated for intelligent energy management.

scholarly journals Effect on Human Body of the Magnetic Field Induced by the High Voltage Transmission Line

2021 ◽  
Vol 23 (2) ◽  
pp. 149-155
Author(s):  
Samira Boumous ◽  
Nacereddine Guettaf ◽  
Amina Hamel ◽  
Ilham Lariche ◽  
Hamou Nouri
Keyword(s):  
High Voltage ◽  
Great Influence ◽  
Low Frequency ◽  
Electrical Energy ◽  
Energy Losses ◽  
High Voltage Transmission Line ◽  
Quality Of Electrical Energy ◽  
The Magnetic Field ◽  
Limit Energy

The quality of electrical energy and the fight against energy losses are a crucial issue for electricity companies. The use of high voltage lines can limit energy losses for the transmission of electricity over long distances. But this solution has the disadvantage of the propagation of the electromagnetic wave which has a great influence on human health. The work presented in this study mainly deals with modelling problems that may be encountered by the community working in the field of low frequency electromagnetic fields. In order to model a power line, we are based on geometric data as well as phase and earth conductor data.

scholarly journals FPGA in the Loop Implementation for Observer Sliding Mode Control of DFIG-Generators for Wind Turbines

Electronics ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 116
Author(s):  
Houda El Alami ◽  
Badre Bossoufi ◽  
Saad Motahhir ◽  
Eman H. Alkhammash ◽  
Mehedi Masud ◽  
...  
Keyword(s):  
Sliding Mode ◽  
Electrical Energy ◽  
Energy System ◽  
Control Technique ◽  
Proposed Model ◽  
Wind Energy System ◽  
Loop Technique ◽  
Grid Side ◽  
Mode Technique

This paper presents a new contribution of the nonlinear control technique of electrical energy in a wind energy system. The nonlinear sliding mode technique used to control the powers of the DFIG-Generator is connected to the power grid by two converters (grid side and machine side). The proposed model is validated using tracking and robustness tests with a real wind speed. The control was developed under Matlab/Simulink, and the FPGA in the Loop technique was used to design the DFIG model. By employing a co-simulation, the purpose is to test the controller for the FPGA simulated model or system in its entirety. The results obtained by the cο-simulation show the efficiency of the proposed model in terms of speed and robustness with a rate THD = 0.95, and the proposed model of the sliding mode controller shows a significant improvement in the quality of energy produced by the wind system.

Dynamic stability of wind farm multi-machine power system

2021 ◽  
pp. 0309524X2110312
Author(s):  
Cherif Nacim ◽  
Allaoui Tayeb ◽  
Tadjine Mohamed ◽  
Seddiki Zahira
Keyword(s):  
Wind Farm ◽  
Reactive Power ◽  
Magnetic Energy ◽  
Stable State ◽  
Electrical Energy ◽  
Electrical Networks ◽  
Electrical Systems ◽  
The Stability ◽  
Electrical Energy Production ◽  
Magnetic Energy Storage

Since it is difficult to store electrical energy, production, and consumption must be in equilibrium under constant voltage and frequency. The producers, the receivers, and the electrical networks that connect them, have mechanical and electrical inertias which disturb this balance. Faced with a variation in power, the electrical system, after oscillations, returns to a stable state. In some cases, the oscillatory regime may diverge. Studies are being carried out to remedy this problem and ensure the stability of the electricity network. This manuscript focuses on FACTS regulation which helps electrical systems, subjected to strong disturbances, to maintain their stability. Magnetic Energy Storage Superconductor (SMES) contains a short-circuited superconducting coil on itself, which injects or absorbs active and reactive power into the system, thereby improving the stability of electrical systems.

scholarly journals Droop Control Based Grid-Connected Solar Photovoltaic Inverters for Distributed Generation

2019 ◽  
Vol 9 (1S3) ◽  
pp. 90-94
Keyword(s):  
Reactive Power ◽  
Electrical Energy ◽  
Power Sharing ◽  
Pid Controllers ◽  
Droop Control ◽  
Solar Photovoltaic ◽  
Pwm Inverter ◽  
Photovoltaic Array ◽  
The Stability

In day to day the demand of electrical energy has been increasing in worldwide, as well the share of solar photovoltaic power generation has increased extremely because of population growth, urbanization, etc. Although the power generated from solar photovoltaic is erratically, and it makes the stability and reliability problems in a utility grid. This paper projects a P/Q droop control strategy for a grid-tied PWM inverter. This paper introduces an entire model of grid-connected solar photovoltaic array; inverter with droop control, and loads are developed for this operation. The locus points of the both power sharing of the DG system is developed by the proposed control operation. PI controllers were used in this droop control was espoused to adjust the constraints of PI controller. The results of the proposed droop control inject positive and reactive power into a variation of loads and improving the quality of power as compared to the conventional PID controllers.

scholarly journals Feasibility of a 100% Global Renewable Energy System

Energies ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5543
Author(s):  
Patrick Moriarty ◽  
Damon Honnery
Keyword(s):  
Renewable Energy ◽  
Energy Levels ◽  
Electrical Energy ◽  
Energy System ◽  
The Novel ◽  
Novel Approach ◽  
Energy Needs ◽  
Energy Conversion And Storage ◽  
Business As Usual

Controversy exists as to whether renewable energy (RE) can provide for all the world’s energy needs. The purpose of this paper is to help resolve this vital question. Official forecasts see a resumption of a business-as-usual world after the pandemic-induced recession, with further economic growth out to at least 2050. The novel approach taken in this paper is to assume that such a world is fueled entirely with RE at global energy levels at or above those of today, and then to examine whether this scenario is feasible. Because the intermittent primary electricity sources, wind, and solar power, would have to supply nearly all this energy, a simplification made for this analysis is that they do supply 100% of all energy, including non-electrical energy needs. It is found that the energy that could be delivered by these two sources is much less than often assumed, for several reasons: The declining quality of inputs; the need for inclusion of uncounted environmental costs; the need for energy conversion and storage; and the removal of existing fossil fuel energy subsidies. It is concluded that a future world entirely fuelled by RE would necessarily be a lower-energy one.

scholarly journals Thermographic analysis of the quality of wire connections with overcurrent switches

2018 ◽  
Vol 49 ◽  
pp. 00118
Author(s):  
Daniel Tokarski ◽  
Tomasz Grudniewski ◽  
Marta Chodyka ◽  
Jerzy Antoni Nitychoruk
Keyword(s):  
Heat Release ◽  
Surface Area ◽  
Contact Surface ◽  
Thermal Imaging ◽  
Electrical Energy ◽  
Energy Losses ◽  
Excessive Heat ◽  
Imaging Camera ◽  
Thermographic Analysis

The article aims to present the issue of excessive heat release at installation joints due to insufficient contact surface of the joining elements. The conducted research attempts to estimate the losses caused by an insufficient contact surface area. A laser pyrometer and a thermal imaging camera were used to perform the tests. Both devices generate images without having to touch the tested element, which may indicate that the obtained results are very accurate. The completed tests have shown that an insufficient contact surface of the joints results in an increased heat release, which leads to higher electrical energy losses and increased wear of the installation connectors.

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