scholarly journals Integrated Transient Stability Analysis with Multi-Large-Scale Solar Photovoltaic in Distribution Network

2020 ◽  
Vol 30.8 (147) ◽  
pp. 40-45
Author(s):  
Ngoc Thien Nam Tran ◽  
◽  
Hong-Tzer Yang ◽  
Minh Quan Duong ◽  
Keyword(s):  
Large Scale ◽  
Transient Stability ◽  
Renewable Energy Sources ◽  
Distribution Grid ◽  
Angle Variation ◽  
Actual Distribution ◽  
Return On Capital ◽  
National Power ◽  
The Government ◽  
The Stability

Using renewable energy sources (RES) to face energy shortages in the context of rising load demand is a central issue in national power system planning. With low investment rates, rapid return on capital as well as many incentives from the government, solar energy is being more invested than other types of RES, as it can be seen as a rooftop and large-scale Photovoltaic (LSPV) system. However, if the LSPV penetrates too much into the grid, it will weaken the stability of the system, especially when a fault occurs. This paper aims to evaluate the transient stability of an actual distribution grid (DG) under different penetration levels of LSPV by ETAP software. The frequency and voltage responses will be presented in the results along with the rotor angle variation of a conventional generator located near the LSPV.

scholarly journals Large Scale Renewable Energy Integration: Issues and Solutions

Energies ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1996 ◽  
Author(s):  
G. V. Brahmendra Kumar ◽  
Ratnam Kamala Sarojini ◽  
K. Palanisamy ◽  
Sanjeevikumar Padmanaban ◽  
Jens Bo Holm-Nielsen
Keyword(s):  
Renewable Energy ◽  
Large Scale ◽  
Renewable Energy Sources ◽  
Frequency Variation ◽  
Energy Integration ◽  
Renewable Energy Integration ◽  
Safety Issues ◽  
Additional Strain ◽  
The Stability ◽  
Stability Issues

In recent years, many applications have been developed for the integration of renewable energy sources (RES) into the grid in order to satisfy the demand requirement of a clean and reliable electricity generation. Increasing the number of RES creates uncertainty in load and power supply generation, which also presents an additional strain on the system. These uncertainties will affect the voltage and frequency variation, stability, protection, and safety issues at fault levels. RES present non-linear characteristics, which requires effective coordination control methods. This paper presents the stability issues and solutions associated with the integration of RES within the grid.

scholarly journals Frequency Control of Large-Scale Interconnected Power Systems via Battery Integration: A Comparison Between the Hybrid Battery Model and WECC Model

2021 ◽  
Author(s):  
Roghieh Abdollahi Biroon ◽  
Pierluigi Pisu ◽  
David Schoenwald
Keyword(s):  
Power Systems ◽  
Power System ◽  
Large Scale ◽  
System Analysis ◽  
Hybrid Control ◽  
Frequency Control ◽  
Renewable Energy Sources ◽  
Control Design ◽  
Energy Sources ◽  
The Stability

The increasing penetration of renewable energy sources in power grids highlights the role of battery energy stor- age systems (BESSs) in enhancing the stability and reliability of electricity. A key challenge with the renewables’, specially the BESSs, integration into the power system is the lack of proper dynamic model for stability analysis. Moreover, a proper control design for the power system is a complicated issue due to its complexity and inter-connectivity. Thus, the application of decentralized control to improve the stability of a large- scale power system is inevitable, especially in distributed energy sources (DERs). This paper presents an optimal distributed hybrid control design for the interconnected systems to suppress the effects of small disturbances in the power system employing utility-scale batteries based on existing battery models. The results show that i) the smart scheduling of the batteries’ output reduces the inter-area oscillations and improves the stability of the power systems; ii) the hybrid model of the battery is more user-friendly compared to the Western electricity coordinating council (WECC) model in power system analysis.

scholarly journals Farmers empowerment level analysis in farming during the Covid-19 pandemic and its impact on farm income

2021 ◽  
Vol 883 (1) ◽  
pp. 012034
Author(s):  
I P N Damanik ◽  
M E Tahitu ◽  
M Turukay ◽  
F P Adam
Keyword(s):  
Large Scale ◽  
Descriptive Analysis ◽  
Plant Production ◽  
Farm Income ◽  
Farmer Groups ◽  
The Government ◽  
Food Commodities ◽  
The Stability ◽  
On Farm ◽  
Production Facilities

Abstract This study aims to analyze the level of farmer empowerment in carrying out farming activities as the main livelihood and its impact on farm income during the Covid-19 pandemic. The research was conducted online by distributing questionnaires in the form of google form in various affordable areas. There were 113 responses obtained by returning the google form on time. The three regions that sent the most responses were farmers in Ambon City, West Seram Regency, and Central Maluku Regency. After analyzing using qualitative descriptive analysis, the results showed that the level of farmer empowerment during the Covid-19 pandemic decreased, especially in terms of marketing of crop products for fruit and vegetable commodities, while for food commodities such as rice tended to be stable. This has an impact on farm productivity and income. The main factor causing a decrease in the level of farmer empowerment is the decreasing purchasing power of the community during the Covid pandemic19; Accessibility of farmers to markets is difficult, there are even times when farmers cannot go to the market due to large-scale social restrictions, the frequency of presence of collectors is reduced, access to plant production facilities is hampered unlike before the Covid pandemic19. This condition requires serious attention from the government so that farmers do not experience difficulties in marketing agricultural products and can maintain the stability of farm income. The solution at the farmer level is to form farmer groups so that the marketing of farm products and the fulfillment of plant production facilities can be done through farmer groups.

Studies on the Grid-Connected Characteristics about Large-Scale Photovoltaic Power Station in Weak Grid Systems

2011 ◽  
Vol 347-353 ◽  
pp. 639-646
Author(s):  
Hui Jiang ◽  
Zhi Wei Li ◽  
Xin Zheng
Keyword(s):  
Theoretical Basis ◽  
Large Scale ◽  
Transient Stability ◽  
Energy Strategy ◽  
Power Station ◽  
Grid Systems ◽  
Weak Grid ◽  
Good Consistency ◽  
New Energy ◽  
The Stability

This paper made some researches of modeling on the systems of the large-scale photovoltaic（PV） power station, and established the PV model, the rectifier and inverter circuits and so on. Using MATLAB and PSASP, simulation and analysis of grid-connected characteristics about the large-scale PV power station in weak grid systems were carried out, focusing on the transient stability in the fault condition of the line-side and the power quality. These two simulation results had good consistency, which demonstrated the accuracy of the large-scale PV power station model in this paper and the analysis of its grid-connected characteristics. The conclusion of this paper will provide some theoretical basis of improving the stability of grid-connected and reducing the harmonic current in weak grid systems, and will also provide some theoretical basis and the guide of grid-connected for the new energy strategy of our country in the future.

scholarly journals A Study on the Power Reserve of Distributed Generators Based on Power Sensitivity Analysis in a Large-Scale Power System

Electronics ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 769
Author(s):  
Dongmin Kim ◽  
Jung-Wook Park ◽  
Soo Hyoung Lee
Keyword(s):  
Power System ◽  
Nuclear Power ◽  
Large Scale ◽  
Renewable Energy Sources ◽  
Droop Control ◽  
Generation Process ◽  
Power Generators ◽  
Distributed Generators ◽  
Proper Power ◽  
The Stability

Converter-based generators (CBGs) that use renewable energy sources (RESs) are replacing traditional aging coal and nuclear power generators. Increasing the penetration of CBGs into the entire power generation process reduces both the inertia constant of the power system and the total amount of power reserves. Additionally, RESs are very intermittent and it is difficult to predict changes in them. These problems, due to CBGs using RESs, pose new challenges to net–load balancing. As a solution, this paper proposes a virtual multi-slack (VMS) droop control that secures the stability and efficiency of system operation by controlling the output of CBGs distributed in various regions. The VMS droop control makes it possible to increase the inertia constant of the power system and to respond quickly and appropriately to load changes through the proposed VMS droop control based on power sensitivity. It is also proposed that the process selects proper power reserves of CBGs for stable VMS droop control. To verify the effectiveness of the proposed VMS droop control and the proper power reserve selection method for CBGs, several case studies were performed using a real Korean power system.

scholarly journals Frequency Control of Large-Scale Interconnected Power Systems via Battery Integration: A Comparison between the Hybrid Battery Model and WECC Model

Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5605
Author(s):  
Roghieh Abdollahi Biroon ◽  
Pierluigi Pisu ◽  
David Schoenwald
Keyword(s):  
Power Systems ◽  
Power System ◽  
Distributed Control ◽  
Hybrid Model ◽  
Large Scale ◽  
Dynamic Models ◽  
Frequency Control ◽  
Renewable Energy Sources ◽  
Control Design ◽  
The Stability

The increasing penetration of renewable energy sources in power grids highlights the role of battery energy storage systems (BESSs) in enhancing the stability and reliability of electricity. A key challenge with the renewables’, specially the BESSs, integration into the power system is the lack of proper dynamic models and their application in power system analyses. The control design strategy mainly depends on the system dynamics which underlines the importance of the system accurate dynamic modeling. Moreover, control design for the power system is a complicated issue due to its complexity and inter-connectivity, which makes the application of distributed control to improve the stability of a large-scale power system inevitable. This paper presents an optimal distributed control design for the interconnected systems to suppress the effects of small disturbances in the power system employing utility-scale batteries based on existing battery models. The control strategy is applied to two dynamic models of the battery: hybrid model and Western electricity coordinating council (WECC) model. The results show that (i) the smart scheduling of the batteries’ output reduces the inter-area oscillations and improves the stability of the power systems; (ii) the hybrid model of the battery is more user-friendly compared to the WECC model in power system analyses.

scholarly journals “Is Renewable Energy Affordable?” By Derek George Birkett; Cambridge Scholars Publishing, Newcastle upon Tyne, UK. (2019). Price £58.99 ISBN (10): 1-5275-2046-3; ISBN (13): 978-1-5275-2046-2

2019 ◽  
Vol 11 (7) ◽  
pp. 1969
Author(s):  
Michael Simpson
Keyword(s):  
Renewable Energy ◽  
Well Being ◽  
Policy Support ◽  
Carbon Taxes ◽  
Distribution Grid ◽  
Renewable Sources ◽  
Electrical Grid ◽  
Renewable Sources Of Energy ◽  
The Government ◽  
The Stability

This book is written by a retired grid engineer and deals with renewable sources of energy and the instability of the electrical distribution grid. Derek Birkett carefully goes through the arguments about the electrical supply and the effect of intermittent and variable renewable sources of energy on grid stability. As a result of investment in renewable energy and the increasing costs of carbon taxes levied on fossil fuel fired generation, the government has created a situation which is very expensive for consumers and industry, and is unsustainable. The government has intervened in the energy market and provided subsidies and policy support for renewable energy without considering the consequences for the stability of the electrical grid system. The government has no strategic vision of the future for energy generation and no expertise to draw upon. Consumers experience increasing energy costs, power outages and blackouts which will be costly and hard to recover from. Derek states quite clearly that “… the state should no longer use environmental regulation for political purposes unless there is a clear imperative for national well-being and security.”

scholarly journals Definition of Key Indicators to Identify Optimal Distribution Grid Restoration Strategies

2020 ◽  
Vol 209 ◽  
pp. 01001
Author(s):  
Christoph Strunck ◽  
Christian Rehtanz
Keyword(s):  
Power Plants ◽  
Large Scale ◽  
Renewable Energy Sources ◽  
Weather Conditions ◽  
Energy System ◽  
Indicator System ◽  
Distribution Grid ◽  
Restoration Strategies ◽  
Key Indicators ◽  
Distribution Grids

Due to significant changes in the power energy system and extreme weather conditions as a result of the increasing impact of climate change, large scale blackouts become more likely. With the rising penetration of renewable energy sources in distribution grids and the shutdown of large conventional power plants, the system inertia and therefore the resilience is decreasing. This will have a significant influence on the provision of ancillary services in the future. Especially for grid restoration processes, new concepts are necessary to assure an optimal integration of the distributed energy resources to resupply a grid after a blackout. However, to identify and assess the capability of distribution grids to restore the grid operation to resupply their grid independently of the transmission system key indicators are necessary for an analysis. Hence, this paper introduces a key indicator system, which has the goal to address several challenges of a distribution grid restoration.

scholarly journals The Knowledge of People About the Use of Renewable Energy and Environmental Awareness in Their Area, Irbid Governorate as a Case Study

2021 ◽  
Vol 16 (2) ◽  
pp. 365-371
Author(s):  
Samia Ayyoub Salim Ayyoub ◽  
Nuha Mahmoud Mesleh Radaydeh
Keyword(s):  
Renewable Energy ◽  
Energy Consumption ◽  
Solar Energy ◽  
Large Scale ◽  
Renewable Energy Sources ◽  
Photovoltaic Cells ◽  
Renewable Resource ◽  
Energy System ◽  
The North ◽  
The Government

In the global effort to curb energy consumption and promote a sustainable lifestyle for our societies, we must strive to lower our energy needs in all aspects of our lives. One of the biggest contributors to our energy requirements are the buildings we spend most of our time inside. Buildings’ energy consumption can take many forms, such as, air conditioning, heating, ventilation, and lighting systems in order to create a comfortable environment for the users. One way of reducing buildings’ energy consumption is the use of renewable resource for energy. The main aim of this research is to measure and assess the public perceptions, knowledge and awareness of the concept of renewable energy, with specific regards to the use of solar photovoltaic cells, as well as investigate the desire to spend on the installation of renewable energy sources. Data was collected through a survey questionnaire applied in Irbid governorate in the north of Jordan. The statistical SPSS program was used to analyze closed-ended questionnaires and obtain numerical results based on arithmetical averages and percentages. The results show people are adequately aware of the benefits of renewable energy and most would like to have photovoltaic cells installed. However, 54.35% of the study sample live in apartments and do not have the space for the installation. 70.1% are open to the idea of sharing the solar energy system with their neighbors. 50% thought that the photovoltaic cells affected the aesthetics of the architecture style of the buildings especially the more traditional styles. It is concluded that the government needs to build a large-scale solar energy project to sustainably produce electricity instead of relying on individuals who generally lack the ability or the space for such systems, taking in note that the general public supports such concepts.

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