Control of Sectioning Distributed Power Grids with Renewable Energy Sources

The paper describes special aspects of using the wind power plants (wind turbines) in the power grid. The paper provides the classification and schematic presentation of AC wind turbines, analyzes the role, place and performance of wind power plants in Smart Grid systems with a large share of renewable energy sources. The authors also reviews a detailed analysis of existing AC wind turbines in this paper. Recommendations are given for how to enhance the wind power plants in smart grids in terms of reliability, and introduce the hardware used in the generation, conversion and interface systems into the existing power grid. After the wind power plants had been put online, the relevance of the Smart Grid concept for existing power grids was obvious. The execution of such projects is assumed to be financially costly, requires careful study, and development of flexible algorithms, but in some cases this may be the only approach. The analysis of using wind turbines shows that the structural configuration of wind power plants can be based on the principles known in the power engineering. The approaches may differ, not fundamentally, but in engineering considerations. it is necessary to point out that the method of controlling dual-power machines is quite comprehensive so that their wide use will face operational problems caused by the lack of highly professional specialists in electric drives. Therefore, it seems advisable to use square-cage asynchronous generators in wide applications. The paper shows that as the renewable energy sources are largely used in power grids, there is an issue of maintaining the power generation at a required level considering the variability of incoming wind energy. This results in the malfunctions in the operation of relay protection devices and emergency control automatics (RP and ECA), and the complicated control. Also, the standards of the CIS countries and regulatory documents miss the requirements for the wind turbine protections, taking into account their specialty causing the inefficient standard protective logic, which does not work correctly in a number of abnormal and emergency operating modes, and especially Smart Grid in power grids.

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Adaptive virtual-inertia control and chicken swarm optimizer for frequency stability in power-grids penetrated by renewable energy sources

Neural Computing and Applications ◽

10.1007/s00521-020-05054-8 ◽

2020 ◽

Author(s):

Ahmed M. Othman ◽

Attia A. El-Fergany

Keyword(s):

Renewable Energy ◽

Renewable Energy Sources ◽

Frequency Stability ◽

Power Grids ◽

Energy Sources ◽

Virtual Inertia ◽

Inertia Control

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RESEARCH ON DISTRIBUTED POWER GENERATION BASED ON RENEWABLE ENERGY SOURCES AND HYDROGEN BATTERIES

Alternative Energy and Ecology (ISJAEE) ◽

10.15518/isjaee.2016.03-04.005 ◽

2016 ◽

pp. 61-72

Author(s):

F. R. Ismagilov ◽

I. H. Hayrullin ◽

V. E. Vavilov ◽

A. M. Yakupov ◽

G. F. Yakupova ◽

...

Keyword(s):

Power Generation ◽

Renewable Energy ◽

Renewable Energy Sources ◽

Energy Sources ◽

Distributed Power ◽

Distributed Power Generation

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IMPROVING THE DYNAMICS OF AN INVERTER-BASED PV GENERATOR DURING LOAD DUMPS

Informatyka Automatyka Pomiary w Gospodarce i Ochronie Środowiska ◽

10.35784/iapgos.24 ◽

2019 ◽

Vol 9 (4) ◽

pp. 83-86

Author(s):

Łukasz Kwaśny

Keyword(s):

Renewable Energy ◽

Dynamic Properties ◽

Renewable Energy Sources ◽

Power Grids ◽

Energy Sources ◽

Power Sources ◽

Full Load ◽

Transient States ◽

Non Linear ◽

Pv Generator

In distribution power grids supplied by dispersed power sources, for example RES (Renewable Energy Sources), in the event of a load dump, unexpected transient states may appear. These states involve a dangerous increase in voltage or current. This situation may lead to the disconnection of these sources. To prevent this phenomenon, a non-linear anti-windup regulator with a conditional integrator has been proposed. This solution allows a significant improvement of the generator’s dynamic properties both at load dump and on return to full load.

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The Present Trends and Challenges in Renewable Energy Sources Connected to a Grid

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.k2109.1081219 ◽

2019 ◽

Vol 8 (12) ◽

pp. 3118-3130

Keyword(s):

Renewable Energy ◽

Smart Grids ◽

Renewable Energy Sources ◽

Power Grids ◽

Energy Sources ◽

Self Healing ◽

Monitoring And Control ◽

Decentralized Generation ◽

Policy Interventions ◽

And Control

Smart grids are alterations of the traditional power grids where the monitoring and control of the electricity system are faster and easier than before due to their automated self-healing and sensing processes. However, their primary target is two-way communication, which is only feasible if the decentralized generation of power will exist alongside the national grid. In that light, this report first gives a comprehensive description of smart grids and their history. Afterward, it examines the two major groups of challenges to the penetration of the technology; that is technical and regulatory, policy, and economic challenges. Case studies from the U.S., Canada, Korea, California, and Sweden are used to illustrate the discovered trends and challenges to renewable energy sources connected to grids and demonstrate possible solutions. The research design employed in the study is diagnostic since the problem, its history, and solutions are all reviewed in the report. The study's recommendation is policy interventions to solve both the regulatory and technical challenges to the proliferation of gridded renewables.

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Design of a Management Algorithm for Energy Trading in Microgrids

Recent Advances in Electrical & Electronic Engineering (Formerly Recent Patents on Electrical & Electronic Engineering) ◽

10.2174/2213111607666200214121935 ◽

2020 ◽

Vol 13 (7) ◽

pp. 1028-1040

Author(s):

Dimosthenis Verginadis ◽

Athanasios Karlis

Keyword(s):

Renewable Energy ◽

Electric Vehicles ◽

Low Voltage ◽

Renewable Energy Sources ◽

Distribution Networks ◽

Power Grids ◽

Energy Sources ◽

Future Research ◽

Energy Trading ◽

Management Algorithm

Background: The scope of this paper is to study the energy trading in microgrids. Microgrids are low voltage or medium voltage distribution networks, which consist of energy storage systems, electric loads, e.g. electric vehicles and Renewable Energy Sources (RES). Methods: Legacy energy grids are being transformed by the introduction of small to medium sized individual or cooperative, mostly RES invested energy producers and prosumers. Electric vehicles penetrate the market and modern power grids integrate them as ancillary services providers when there are peak domestic loads, as well as in order to balance grid voltage aiming to increase system reliability, compensating for renewable energy sources’ intermittency and volatility in energy production. Results: An elaborate management algorithm is proposed in this paper, to balance demand and local renewable energy sources microgrid supply. Conclusion: Finally, the results of simulations of different scenarios, including economic parameters and proposals for future research are presented.

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