scholarly journals AN OVERVIEW ON POWER QUALITY ISSUES IN POWER GRIDS CONNECTED WITH NON-CONVENTIONAL ENERGY SOURCES

2021 ◽  
Vol 6 (4) ◽  
Author(s):  
Madha Chesti ◽  
Ishtiyaq Shafi Rafiqi
Keyword(s):  
Power System ◽  
Electric Power ◽  
Power Quality ◽  
Electric Power System ◽  
Power Grids ◽  
Energy Sources ◽  
The World ◽  
Non Linear ◽  
Quality Issues

The term power quality is inescapable when it comes to Electric power system. The main intent of the researchers and different organizations all over the world is to provide the consumers with quality power. Practically, it is difficult to achieve quality power as there are number of issues associated with Electric power system called as power quality problems. Harmonics, transients, use of non linear loads, interruptions etc. are the factors which cause disturbances in the electric power system and thus leads to the deterioration in the quality of power. These disturbances are the major challenges to the power quality and must be analyzed properly before mitigating them. The paper has put emphasis on the major disturbances in the power grids. The paper is also considerate about the causes and effect of these disturbances in the power grids.

scholarly journals SIMULATOR GENERATOR HARMONIK

2012 ◽  
Vol 16 (3) ◽  
pp. 146
Author(s):  
Priyo Sasmoko
Keyword(s):  
Power System ◽  
Electric Power ◽  
Harmonic Component ◽  
Electric Power System ◽  
Load Current ◽  
Harmonic Generator ◽  
Linear Load ◽  
Non Linear ◽  
Non Linear Load

Priyo Sasmoko, in this paper explain that the need of electric power recently progressively complex, not only the requirement of availability of electricity, but the quality of energy have become prime facie demand. Studies of electricity quality have been conducted by many experts, one of them is about harmonic. Harmonic represent waving current or tension which is tension distortion at electric power system mains so that can result unideal waveform. The study of harmonic required appliance or obyek which need to be checked. In this research Simulator Generator Harmonik is made  a harmonic generator module which can deputize the appliance or obyek yielding harmonic with harmonic component and the THD which can be varried. This module works by dividing one cycle of mains become some slots so it can be got harmonic component as desired. To change the THD,a variation of linear load is used so that the ratio of non-linear load current can be varried. Keywords : Simulator, Harmonic component, THD

Aplikasi Dynamic Voltage Restorer Series Pada Analisis Voltage Sags

2012 ◽  
Vol 9 (2) ◽  
Author(s):  
Marthen Liga
Keyword(s):  
Power System ◽  
Electric Power ◽  
Power Quality ◽  
Electric Power System ◽  
Voltage Sag ◽  
Dynamic Voltage Restorer ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
Quality Of Electric Power

An electric power system must have a high level of reliability that the system is able to provide the required supply of electrical energy continuously and with good power quality, in terms of voltage regulation and frequency regulation. Decline in the quality of electric power will make serious disruption to the operational process industry customers.Dynamic voltage restorer (DVR) is a method of power quality solutions that are used to recover the voltage drop (sag) through the injection voltage on the network. Minimum power injection method is the minimum active power supplied to the load as a result of the voltage sag compensation so as to restore the load voltage back to normal. Control of dynamic voltage restorer produces a rapid and appropriate response to be the right solution to improve the quality of electric power system. Dynamic voltage restorer series is used to improve the quality of the voltage due to voltage sag that can interfere with the performance of critical equipment or sensitive equipment. Performance Series DVR is shown as an interruption of the voltage sag caused by a short circuit or some disturbance of the phase and three phase power system. Process simulation using MATLAB-SIMULINK software to the electric power system toolbox.

scholarly journals Power quality improvement recommendations for shipboard power systems

2020 ◽  
pp. 55-61
Author(s):  
В.Ф. Белей ◽  
М.С. Харитонов ◽  
Р.О. Брижак
Keyword(s):  
Power Systems ◽  
Power System ◽  
Energy Saving ◽  
Electric Power ◽  
Power Quality ◽  
Electromagnetic Interference ◽  
Electrical Equipment ◽  
Electric Power System ◽  
Maritime Industry

В настоящее время на судах и объектах морской индустрии широко внедряется энергосберегающее электрооборудование, что позволяет добиться резкого снижения расхода электроэнергии и массогабаритных показателей оборудования, существенно расширяет функциональные возможности электротехнических комплексов и систем, приводит к улучшению эксплуатационных характеристик. Однако использование новейших энергосберегающих технологий, основанных на нелинейных элементах, и коммутация электрооборудования приводит к ухудшению качества электрической энергии в судовой электроэнергетической системе. В то же время, растет число потребителей, предъявляющих к качеству электроэнергии повышенные требования. В итоге, работа судовых энергокомплексов может отличаться от расчетной, а в ряде случаев становится аварийной. В работе приведены результаты экспериментальных исследований показателей качества электрической энергии в судовой электроэнергетической системе учебного парусного судна «Крузенштерн». Представлены результаты лабораторных исследований на физической модели судовой электростанции с источниками электромагнитных помех, обоснованы организационные и технические решения по снижению уровня электромагнитных помех в судовых электроэнергетических системах. Nowadays, energy-saving electrical equipment is widely introduced on ships and maritime industry facilities. It leads to a decrease in power consumption, weight and dimensions of equipment, significantly expands the functionality of electrical complexes and systems, and provides improvement of operational characteristics. However, the use of the latest energy-saving technologies based on non-linear elements and the switching of electrical equipment leads to a deterioration in the quality of electrical energy in the ship's electric power system. At the same time, the number of consumers with increased requirements for the quality of electricity is growing. As a result, the operation of ship power complexes may differ from the normal one, and in some cases it becomes emergency. The paper presents the results of experimental studies of electric power quality indicators in the ship's electric power system of the sail training ship "Kruzenshtern". The results of laboratory studies on a physical model of a ship power plant with sources of electromagnetic interference are presented, organizational and technical solutions to reduce the level of electromagnetic interference in ship power systems are substantiated.

scholarly journals Towards 100% Renewables by 2030: Transition Alternatives for a Sustainable Electricity Sector in Isla de la Juventud, Cuba

Energies ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2862
Author(s):  
Mika Korkeakoski
Keyword(s):  
Renewable Energy ◽  
Power System ◽  
Electric Power ◽  
Renewable Energy Sources ◽  
Electric Power System ◽  
Electricity Production ◽  
Energy Sources ◽  
Cuban Government ◽  
Isla De La Juventud ◽  
Near Future

Renewable Energy Sources (RES) have become increasingly desirable worldwide in the fight against global climate change. The sharp decrease in costs of especially wind and solar photovoltaics (PV) have created opportunities to move from dependency on conventional fossil fuel-based electricity production towards renewable energy sources. Renewables experience around 7% (in 2018) annual growth rate in the electricity production globally and the pace is expected to further increase in the near future. Cuba is no exception in this regard, the government has set an ambitious renewable energy target of 24% RES of electricity production by the year 2030. The article analyses renewable energy trajectories in Isla de la Juventud, Cuba, through different future energy scenarios utilizing EnergyPLAN tool. The goal is to identify the best fit and least cost options in transitioning towards 100% electric power systemin Isla de la Juventud, Cuba. The work is divided into analysis of (1) technical possibilities for five scenarios in the electricity production with a 40% increase of electricity consumption by 2030: Business As Usual (BAU 2030, with the current electric power system (EPS) setup), VISION 2030 (according to the Cuban government plan with 24% RES), Advanced Renewables (ARES, with 50% RES), High Renewables (HiRES, with 70% RES), and Fully Renewables (FullRES, with 100% RES based electricity system) scenarios and (2) defining least cost options for the five scenarios in Isla de la Juventud, Cuba. The results show that high penetration of renewables is technically possible even up to 100% RES although the best technological fit versus least cost options may not favor the 100% RES based systems with the current electric power system (EPS) setup. This is due to realities in access to resources, especially importation of state of the art technological equipment and biofuels, financial and investment resources, as well as the high costs of storage systems. The analysis shows the Cuban government vision of reaching 24% of RES in the electricity production by 2030 can be exceeded even up to 70% RES based systems with similar or even lower costs in the near future in Isla de la Juventud. However, overcoming critical challenges in the economic, political, and legal conditions are crucially important; how will the implementation of huge national capital investments and significant involvement of Foreign Direct Investments (FDI) actualize to support achievement of the Cuban government’s 2030 vision?

scholarly journals Transient Impact Analysis of High Renewable Energy Sources Penetration According to the Future Korean Power Grid Scenario

2018 ◽  
Vol 10 (11) ◽  
pp. 4140 ◽  
Author(s):  
Seungchan Oh ◽  
Heewon Shin ◽  
Hwanhee Cho ◽  
Byongjun Lee
Keyword(s):  
Renewable Energy ◽  
Power System ◽  
Electric Power ◽  
Power Plants ◽  
Transient Stability ◽  
Impact Analysis ◽  
Renewable Energy Sources ◽  
Electric Power System ◽  
Energy Sources ◽  
The Impact

Efforts to reduce greenhouse gas emissions constitute a worldwide trend. According to this trend, there are many plans in place for the replacement of conventional electric power plants operating using fossil fuels with renewable energy sources (RESs). Owing to current needs to expand the RES penetration in accordance to a new National power system plan, the importance of RESs is increasing. The RES penetration imposes various impacts on the power system, including transient stability. Furthermore, the fact that they are distributed at multiple locations in the power system is also a factor which makes the transient impact analysis of RESs difficult. In this study, the transient impacts attributed to the penetration of RESs are analyzed and compared with the conventional Korean electric power system. To confirm the impact of the penetration of RESs on transient stability, the effect was analyzed based on a single machine equivalent (SIME) configuration. Simulations were conducted in accordance to the Korean power system by considering the anticipated RES penetration in 2030. The impact of RES on transient stability was provided by a change in CCT by increasing of the RES penetration.

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