scholarly journals Hysteresis Controlled Based Power Quality Improvement in a Renewable Energy Source Connected to Utility grid with BESS Based STATCOM

2021 ◽  
Vol 7 (03) ◽  
pp. 250-255
Keyword(s):  
Renewable Energy ◽  
Digital Signal Processor ◽  
Distribution System ◽  
Distribution Systems ◽  
Fossil Fuels ◽  
Reactive Power ◽  
Neutral Current ◽  
Renewable Energy Sources ◽  
Power Converter ◽  
Energy Sources

This Paper presents a control strategy of the grid interconnected inverter Renewable Energy Sources (RES). This system can achieve the maximum benefits from these grid interconnected inverter when installed in 3-phase 4-wire distribution system. Increasing electrification of daily life causes growing electricity consumption and the rising number of sensitive or critical loads demand for high quality electricity. One of the main problems facing today is that related with the transmission and distribution of electricity. Due to the rapid increase in global energy consumption and the diminishing of fossil fuels, the customer demand for new generation capacities and efficient energy production, delivery and utilization keeps rising. Utilizing distributed generation, renewable energy and energy storage can potentially solve problems as energy shortage. With the increase in load demand, the Renewable Energy Sources (RES) are increasingly connected in the distribution systems which utilizes power electronic Converters/Inverters. The inverter can perform as a multi function device by incorporating active power filter functionality. The inverter can thus be utilized as: 1) power converter to inject power generated from RES to the grid, and 2) shunt APF to compensate current unbalance, load current harmonics, load reactive power demand and load neutral current. All of these functions may be accomplished either individually or simultaneously. This new control concept is demonstrated with extensive MATLAB/Simulink simulation studies and validated through digital signal processor-based laboratory experimental results.

scholarly journals Experimental Assessment of a Centralised Controller for High-RES Active Distribution Networks

Energies ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 3364 ◽  
Author(s):  
Francisco García-López ◽  
Manuel Barragán-Villarejo ◽  
Alejandro Marano-Marcolini ◽  
José Maza-Ortega ◽  
José Martínez-Ramos
Keyword(s):  
Renewable Energy ◽  
Distribution System ◽  
Reactive Power ◽  
Renewable Energy Sources ◽  
Distribution Networks ◽  
Energy Sources ◽  
Renewable Energy Resources ◽  
Real Time Control ◽  
Control Actions ◽  
Active Distribution Networks

This paper assesses the behaviour of active distribution networks with high penetration of renewable energy sources when the control is performed in a centralised manner. The control assets are the on-load tap changers of transformers at the primary substation, the reactive power injections of the renewable energy sources, and the active and reactive power exchanged between adjacent feeders when they are interconnected through a DC link. A scaled-down distribution network is used as the testbed to emulate the behaviour of an active distribution system with massive penetration of renewable energy resources. The laboratory testbed involves hardware devices, real-time control, and communication infrastructure. Several key performance indices are adopted to assess the effects of the different control actions on the system’s operation. The experimental results demonstrate that the combination of control actions enables the optimal integration of a massive penetration of renewable energy.

scholarly journals Economic Optimization of Resource Use Based on Smart Grid

2020 ◽  
pp. 37-47
Author(s):  
O.V. Kubatko ◽  
V.M. Ignatchenko ◽  
S.V. Shaparenko ◽  
I.A. Starodub ◽  
D.O. Yaryomenko
Keyword(s):  
Renewable Energy ◽  
Smart Grid ◽  
Energy Policy ◽  
Distribution Systems ◽  
Fossil Fuels ◽  
Renewable Energy Sources ◽  
Energy Sector ◽  
Energy Sources ◽  
Economic Optimization ◽  
Smart Energy Systems

There are significant changes in society's approaches to the energy policy development in the modern world. It is observable a transition from the old model of the energy sector maintenance, which was dominated by large producers, inefficient networks, fossil fuels, imperfect competition in the markets of natural gas, coal, electricity - to a new model, which creates a more competitive environment and equalizes opportunities for development and the dominance one of the types energy production or sources of fuel supply. The traditional network is based on centralized power plants that supply electricity to consumers through simple one-way transmission and distribution systems. The bulk of the current electricity generation capacity in Ukraine is generated by fossil fuels, which significantly contributes to the increase of the carbon dioxide concentration in the Earth's atmosphere and has a corresponding negative consequences for the climate. At the same time, modern preferences are given to increasing energy efficiency and the use of energy from renewable and alternative sources. Implementation of adaptation and prevention measures for climate change is also one of the priorities of global energy development. The renewable energy promotion is causing new economic and scientific challenges for Ukraine. However, at the same time it opens new perspectives for the search and implementation of innovative developments in the field of extraction, processing of fossil fuels, energy supply and consumption, which leads to create a new energy policy of the state. The article discusses theoretical and methodological approaches that reveal the benefits of Smart Grid using. It is emphasized that ensuring energy security and environmental sustainability of the energy sector should be based on the use of renewable energy sources. The article analyzes the main factors that can affect the development of Smart Grid technology. Also, the article describes the best experience of the EU countries, which are introducing smart energy systems for the economic optimization of renewable energy sources use.

scholarly journals Load Areas in Radial Unbalanced Distribution Systems

Energies ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 3030 ◽  
Author(s):  
Giovanni M. Casolino ◽  
Arturo Losi
Keyword(s):  
Renewable Energy ◽  
Distribution System ◽  
Distribution Systems ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Small Scale ◽  
Location Information ◽  
System Operator ◽  
The Individual ◽  
Distribution Grids

The demand becoming flexible is a requirement for the full exploitation of renewable energy sources. Aggregation may foster the provision of flexibility by small-scale providers connected to distribution grids, since it allows offering significant flexibility volumes to the market. The aggregation of flexibility providers is carried out by the aggregator, a new market role and possibly a new market player. Location information of individual flexibility providers is necessary for both the aggregator and the system operators, in particular, the Distribution System Operator (DSO). For the former, information should allow treating a high number of individual flexibility providers as a single provider to offer significant flexibility volumes to the markets; for the latter, the information should ensure an adequate visibility of the connection of the individual providers to the grid. In the paper, the concept of Load Area (LA) is recalled, which combines the needs of location information of the aggregator and of the DSO. A method for the identification and modeling of LAs for the general case of unbalanced radial systems is proposed. The results of the methods’ application to two studied unbalanced networks are presented, showing the effectiveness and viability of the proposed approach.

scholarly journals Experimental Assessment of a Centralised Controller for High-RES Active Distribution Networks

2018 ◽  
Author(s):  
Francisco de Paula García-López ◽  
Manuel Barragán-Villarejo ◽  
Alejandro Marano-Marcolini ◽  
José María Maza-Ortega ◽  
José Luis Martínez-Ramos
Keyword(s):  
Renewable Energy ◽  
Distribution System ◽  
Reactive Power ◽  
Renewable Energy Sources ◽  
Distribution Networks ◽  
Energy Sources ◽  
Renewable Energy Resources ◽  
Real Time Control ◽  
Control Actions ◽  
Active Distribution Networks

This paper assesses the behaviour of active distribution networks with high penetration of renewable energy sources when the control is performed in a centralised manner. The control assets are the on-load tap changers of transformers at the primary substation, the reactive power injections of the renewable energy sources and the active and reactive power exchanged between adjacent feeders when they are interconnected through a DC link. A scaled-down distribution network is used as testbed to emulate the behaviour of an active distribution system with massive penetration of renewable energy resources. The laboratory testbed involves hardware devices, real-time control, and communication infrastructure. Several key performance indices are adopted to assess the effects of the different control actions on the system operation. The experimental results demonstrate that the combination of control actions enables the optimal integration of a massive penetration of renewable energy.

scholarly journals Economic and Environmental Assessment of Smart Distributed Power Systems in India for Emission Reductions

2020 ◽  
Vol 8 (5) ◽  
pp. 2009-2018
Keyword(s):  
Renewable Energy ◽  
Power Systems ◽  
Distributed Generation ◽  
Distribution System ◽  
Alternative Energy ◽  
Fossil Fuels ◽  
Renewable Energy Sources ◽  
Computer Software ◽  
Optimal Solution ◽  
Energy Sources

As the global warming is increasing day by day, distributed generation based on renewable energy will play a major role in the production of electricity. Renewable energy sources are considered as the most viable alternative energy sources to be used in the place of conventional fossil fuels. Microgrids are the fundamental elements in future smart grid distributed generation systems. This paper illustrates various options for supply of electric power from renewable sources along with storage units and main grid to different types of loads. The sizing of the distribution system and the economic analysis were performed using Homer, computer software designed by National Renewable Energy Laboratory (NREL) at Colorado, United States in 1993. This paper will analyze the Cost of Energy (COE) and Net Present Cost (NPC) for various loads and the system configuration with minimal COE and NPC is considered as the optimal solution for each type of load while reducing the emissions.

scholarly journals Application of PSO for optimal coordination of directional over-current relays in distribution system with distributed renewable energy sources

2021 ◽  
Vol 10 (2) ◽  
pp. 188
Author(s):  
Lazhar Bougouffa ◽  
Abdelaziz Chaghi
Keyword(s):  
Renewable Energy ◽  
Power Distribution ◽  
Distribution System ◽  
Distribution Systems ◽  
Renewable Energy Sources ◽  
Electrical Power ◽  
Distribution Networks ◽  
Electrical Network ◽  
Energy Sources ◽  
Optimal Coordination

<p>The use of Distributed Renewable Energy Sources in the electrical network has expanded greatly. But, integration of these resources into distribution systems caused more problems in protection related issues such as mis-coordination, and changes the direction and value of fault currents. When connecting new D-RES to electrical power distribution networks, it is required to re-coordinate Directional Over-CurrentRelays (DOC-Relays) to ensure the continuity of the power transmission when the short circuits take place. This work presented a Particle Swarm Optimization (PSO) algorithm to determine two independent variables called Pickup current (Ip) and Time Dial Setting (TDS) for optimal setting of relays. From analysis result, the impacts of RES location in the distribution system on DOCRs had been observed on the optimal relays settings</p>

scholarly journals An Effective Bi-Stage Method for Renewable Energy Sources Integration into Unbalanced Distribution Systems Considering Uncertainty

Processes ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 471
Author(s):  
Eman S. Ali ◽  
Ragab A. El-Sehiemy ◽  
Adel A. Abou El-Ela ◽  
Karar Mahmoud ◽  
Matti Lehtonen ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Radial Distribution ◽  
Distribution System ◽  
Distribution Systems ◽  
Optimization Problems ◽  
Renewable Energy Sources ◽  
Distribution Networks ◽  
Test System ◽  
Energy Sources ◽  
The Impact

The output generations of renewable energy sources (RES) depend basically on climatic conditions, which are the main reason for their uncertain nature. As a result, the performance and security of distribution systems can be significantly worsened with high RES penetration. To address these issues, an analytical study was carried out by considering different penetration strategies for RES in the radial distribution system. Moreover, a bi-stage procedure was proposed for optimal planning of RES penetration. The first stage was concerned with calculating the optimal RES locations and sites. This stage aimed to minimize the voltage variations in the distribution system. In turn, the second stage was concerned with obtaining the optimal setting of the voltage control devices to improve the voltage profile. The multi-objective cat swarm optimization (MO-CSO) algorithm was proposed to solve the bi-stages optimization problems for enhancing the distribution system performance. Furthermore, the impact of the RES penetration level and their uncertainty on a distribution system voltage were studied. The proposed method was tested on the IEEE 34-bus unbalanced distribution test system, which was analyzed using backward/forward sweep power flow for unbalanced radial distribution systems. The proposed method provided satisfactory results for increasing the penetration level of RES in unbalanced distribution networks.

Sign in / Sign up

Export Citation Format

Share Document