Comparison of the Impacts of SVC and STATCOM on the Stability of an Electrical Network Containing Renewable Energy Sources

2019 ◽  
pp. 577-584
Author(s):  
Kadri Abdellah ◽  
Makhloufi Salim
Keyword(s):  
Renewable Energy ◽  
Renewable Energy Sources ◽  
Electrical Network ◽  
Energy Sources ◽  
The Stability

scholarly journals A renewable energy forecasting and control approach to secured edge-level efficiency in a distributed micro-grid

Cybersecurity ◽  
2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Raphael Anaadumba ◽  
Qi Liu ◽  
Bockarie Daniel Marah ◽  
Francis Mawuli Nakoty ◽  
Xiaodong Liu ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Mobile Devices ◽  
Prediction Models ◽  
Renewable Energy Sources ◽  
Electrical Network ◽  
Effective Control ◽  
Energy Sources ◽  
Forecasting Model ◽  
Communication Overhead ◽  
Energy Forecasting

AbstractEnergy forecasting using Renewable energy sources (RESs) is gradually gaining weight in the research field due to the benefits it presents to the modern-day environment. Not only does energy forecasting using renewable energy sources help mitigate the greenhouse effect, it also helps to conserve energy for future use. Over the years, several methods for energy forecasting have been proposed, all of which were more concerned with the accuracy of the prediction models with little or no considerations to the operating environment. This research, however, proposes the uses of Deep Neural Network (DNN) for energy forecasting on mobile devices at the edge of the network. This ensures low latency and communication overhead for all energy forecasting operations since they are carried out at the network periphery. Nevertheless, the cloud would be used as a support for the mobile devices by providing permanent storage for the locally generated data and a platform for offloading resource-intensive computations that exceed the capabilities of the local mobile devices as well as security for them. Electrical network topology was proposed which allows seamless incorporation of multiple RESs into the distributed renewable energy source (D-RES) network. Moreover, a novel grid control algorithm that uses the forecasting model to administer a well-coordinated and effective control for renewable energy sources (RESs) in the electrical network is designed. The electrical network was simulated with two RESs and a DNN model was used to create a forecasting model for the simulated network. The model was trained using a dataset from a solar power generation company in Belgium (elis) and was experimented with a different number of layers to determine the optimum architecture for performing the forecasting operations. The performance of each architecture was evaluated using the mean square error (MSE) and the r-square.

scholarly journals Comparative techno-economic analysis of power system with and without renewable energy sources

2021 ◽  
Vol 24 (3) ◽  
pp. 1260
Author(s):  
Hephzibah Jose Queen ◽  
Jayakumar J. ◽  
Deepika T. J.
Keyword(s):  
Renewable Energy ◽  
Economic Analysis ◽  
Renewable Energy Sources ◽  
Technical Analysis ◽  
Test System ◽  
Energy Sources ◽  
Electric Grid ◽  
Test Systems ◽  
The Stability ◽  
Modified Test

<p>The primary aim of this work is to feature the advantages of integrating natural source of energy from the solar and wind to the prevailing electric power systems. Two types of analysis are carried out in two test systems (standard and modified test systems) and the outcome of the test systems are compared. The two analyses are technical analysis and economic analysis. The stability of the voltage is analyzed under technical analysis and the price of energy consumed from the electric grid is calculated and analyzed under the economic analysis. Dynamic hourly load data, hourly solar radiation, hourly wind velocity, and dynamic electricity prices are considered for the standard IEEE system and modified test system (with the integration of RES). Voltage stability index (L-Index) and price of the electricity consumed from electric grid are found for standard test system and the outcome is compared with the outcome of modified test systems. MATLAB coding is done for techno-economic analysis for both test systems. It is inferred from the outcome that the integration of renewable energy sources fairly contributes to the economic benefit of the system by lowering the power purchased from the grid and enhance the stability of the system.</p>

Development of a Basic Voltage Source for a Micro Grid Based on Renewable Energy Sources

2021 ◽  
Vol 1 (42) ◽  
pp. 39-43
Author(s):  
Leonid Yuferev ◽  
Keyword(s):  
Renewable Energy ◽  
Single Phase ◽  
Block Diagram ◽  
Renewable Energy Sources ◽  
Electrical Energy ◽  
Electrical Network ◽  
Voltage Source ◽  
Energy Sources ◽  
Micro Grid ◽  
Alternating Voltage

At the heart of a micro-grid that includes several sources of electrical energy, including renewable energy, there must be a base (reference) source that sets the voltage and frequency in the network. (Research purpose) The research purpose is in developing a basic voltage source of a micro-grid, which includes renewable energy sources. (Materials and methods) The article shows that the sources of electrical energy are different, but the main requirement for them is to be able to supply voltage to the electrical network at any time, there is a standard voltage scale in the network. For a micro-grid, which will include various sources of electrical energy with a total power of up to 25 kW, you can limit yourself to a voltage of 220 V and a single-phase electrical network. (Results and discussion) The article presents a block diagram; technical characteristics and electrical diagram of the inverter of a single-phase basic voltage source; a method for calculating the output filter of the inverter based on pulse-width modulation technology. (Conclusions) When using renewable energy sources in the micro-grid, it is necessary to take into account that there are periods of time in which they do not generate electrical energy and choose as the base one that will not have such moments, or you need to use a temporary electricity storage device. It is possible to use a chemical source or a battery of accumulators as a base source. When creating a micro-grid of alternating voltage, an inverter is added to these sources from constant voltage to alternating voltage. The article presents a block diagram of a base voltage source with an AC output reference voltage to create a micro grid with a power of up to 25 kW.

scholarly journals Stability Analysis of Isolated Hybrid Microgrid for Village Electrification

2018 ◽  
Vol 7 (2.23) ◽  
pp. 235 ◽  
Author(s):  
Kuldip Singh ◽  
Dr M. Narendra Kumar ◽  
Dr Satyasis Mishra
Keyword(s):  
Renewable Energy ◽  
Stability Analysis ◽  
Renewable Energy Sources ◽  
Vital Role ◽  
System Stability ◽  
Energy Sources ◽  
Main Concern ◽  
Hybrid Microgrid ◽  
Voltage Deviation ◽  
The Stability

The village electrification is the main concern for government of India. The isolated Hybrid Microgrid with renewable energy sources has been growing rapidly for village electrification and it is going to play vital role for 100% electrification in rural area by 2020. For planning and designing of isolated hybrid microgrid the power system stability is major parameter and its main concern due to instability in load demand as well as in generation from renewable energy sources.  For renewable energy sources, the controlling of frequency and voltage deviation is a great challenge. This paper is carry out the stability analysis for PV-Biomass based isolated hybrid microgrid on different load and generation conditions and carry out the effect on frequency stability 

Implеmеntаciја i rаzvој prаvilа zа priklјučеnjе gеnеrаtоrskih јеdinicа kоје su prеkо invеrtоrа pоvеzаnе nа mrеžu u Nemačkoj

2021 ◽  
Vol XXIII (4) ◽  
pp. 59-63
Author(s):  
Stаnkо Јаnkоvić ◽  
Bојаn Ivаnоvić
Keyword(s):  
Renewable Energy ◽  
Energy Production ◽  
Production Management ◽  
Renewable Energy Sources ◽  
Distribution Networks ◽  
Energy Sources ◽  
Renewable Sources ◽  
Technical Requirements ◽  
The Stability ◽  
Technical Solutions

The authors review the development of unconventional power generation units in Germany in the last 10 years with a view to possible scenarios in 2035 and 2040. The dynamic development of production from renewable energy sources led to the fact that in some parts of Germany the plan for the production of electricity from renewable sources for 2025 was reached in 2011. Bearing in mind that about 97% of all renewable energy production units are connected to distribution networks, the question of operational production management arises. The paper presents technical solutions for the management of production from renewable sources, as well as the necessary technical requirements for the connection of generator units that are connected to the grid via inverters in order to preserve the stability of the power system.

Research on Island Microgrid Master-Slave Mode

2015 ◽  
Vol 738-739 ◽  
pp. 1026-1029
Author(s):  
Xing Qiao Li ◽  
Xiang Yang Zhao
Keyword(s):  
Renewable Energy ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Current Loop ◽  
Outer Loop ◽  
Matlab Simulink ◽  
The Stability ◽  
Structure And Design ◽  
Slave Mode

Based on island microgrid, using master-slave structure. VF inverter works as master, ensuring the stability of the voltage and frequency of microgird, PQ inverter works as slave, maximize the use of renewable energy sources. Design the controller for VF and PQ inverter respectively. PQ inverter use single current loop, VF inverter use voltage outer loop and current inner loop. Discuss the design of controller in detail. VF inverter and PQ inverter working in parallel in master-slave island microgrid. Simulation runs in Matlab Simulink environment, the result turns out this structure and design is workable and stable.

scholarly journals Empirical Analysis and Geomechanical Modelling of an Underground Water Reservoir for Hydroelectric Power Plants

2020 ◽  
Vol 10 (17) ◽  
pp. 5853
Author(s):  
Javier Menéndez ◽  
Falko Schmidt ◽  
Heinz Konietzky ◽  
Antonio Bernardo Sánchez ◽  
Jorge Loredo
Keyword(s):  
Renewable Energy ◽  
Rock Mass ◽  
Energy Storage ◽  
Support System ◽  
Storage Systems ◽  
Renewable Energy Sources ◽  
Water Reservoir ◽  
Energy Sources ◽  
Pumped Storage ◽  
The Stability

The European Union policy of encouraging renewable energy sources and a sustainable and safe low-carbon economy requires flexible energy storage systems (FESSs), such as pumped-storage hydropower (PSH) systems. Energy storage systems are the key to facilitate a high penetration of the renewable energy sources in the electrical grids. Disused mining structures in closed underground coal mines in NW Spain have been selected as a case study to analyze the construction of underground pumped-storage hydropower (UPSH) plants. Mine water, depth and subsurface space in closured coal mines may be used for the construction of FESSs with reduced environmental impacts. This paper analyzes the stability of a network of tunnels used as a lower water reservoir at 450 m depth in sandstone and shale formations. Empirical methods based on rock mass classification systems are employed to preliminarily design the support systems and to determinate the rock mass properties. In addition, 3D numerical modelling has been conducted in order to verify the stability of the underground excavations. The deformations and thickness of the excavation damage zones (EDZs) around the excavations have been evaluated in the simulations without considering a support system and considering systematic grouted rock bolts and a layer of reinforced shotcrete as support system. The results obtained show that the excavation of the network of tunnels is technically feasible with the support system that has been designed.

Frequency Control Method using Automated Demand Response for Isolated Power System with Renewable Energy Sources

2017 ◽  
Vol 18 (5) ◽  
Author(s):  
Takahiro Uehara ◽  
Dang Ngoc Son ◽  
Hidehito Matayoshi ◽  
Mohamed Lotfy ◽  
Tomonobu Senju ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Power System ◽  
Demand Response ◽  
Control Method ◽  
Frequency Control ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
The Stability ◽  
System Frequency ◽  
Integrated Power System

AbstractIn response to mounting concerns regarding environmental problem and depletion of Energy Resources, the introduction of Renewable Energy Sources (RESs), has been advancing in recent years. The system frequency deviation is a serious problem for a RESs-integrated power system. In this paper, we propose a system frequency control method using the automated demand response (ADR) for an isolated power system with RESs. The ADR can automatically adjust the consumption power of appliances after receiving the DR signal. It is assumed that consumption power of controllable loads is automatically varied based on the electricity price information from the real-time pricing (RTP). This method improves the supply-demand balancing, and hence the system frequency control is achieved. Furthermore, the stability of controller is demonstrated by indicating the poles of the control system.

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