Innovative Means of Increasing the Adjustment Ability of Wind Turbine

Today, wind power is the fastest-growing renewable energy source. Wind power is free, clean, and endless. Furthermore, the cost of the electricity produced by wind turbines reached already the point where it is comparable with that of electricity produced by some of the conventional, fossil based power plants. However, it is still important to improve the technology in order to keep wind energy economically competitive with traditional and other renewable energy sources. In this paper the concept of variable length blades and active flow control systems has been proposed as a means of increasing the energy yield of the turbine.

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Special Aspects of Using the Wind Power Plants In the Power Supply System

E3S Web of Conferences ◽

10.1051/e3sconf/202128801003 ◽

2021 ◽

Vol 288 ◽

pp. 01003

Author(s):

Saken Koyshybaevich Sheryazov ◽

Sultanbek Sansyzbaevich Issenov ◽

Ruslan Maratbekovich Iskakov ◽

Argyn Bauyrzhanuly Kaidar

Keyword(s):

Renewable Energy ◽

Smart Grid ◽

Wind Power ◽

Wind Turbines ◽

Power Plants ◽

Power Grid ◽

Renewable Energy Sources ◽

Power Grids ◽

Energy Sources ◽

Wind Power Plants

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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Analysis about the Feasibility of Power Generation through Renewable Energy on Coral Reefs

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.512-515.2625 ◽

2012 ◽

Vol 512-515 ◽

pp. 2625-2628

Author(s):

Jie Liu ◽

Hai Bo Jiang ◽

Hang Guo

Keyword(s):

Power Generation ◽

Renewable Energy ◽

Coral Reefs ◽

Wind Power ◽

Renewable Energy Sources ◽

Ocean Current ◽

Energy Sources ◽

Development And Utilization ◽

The Cost ◽

Current Energy

This paper analyzed the feasibility of development and utilization of four kinds of renewable energy sources which are wind energy, wave energy and ocean current energy, solar energy and gave some specific recommendations about the use of wind power. The richness of four kinds of energy sources and some problems about the cost, reliability, installation, utilization and maintenance were systematically investigated. Studies have shown that on the coral reefs solar power generation has the more feasibility than wind power generation, and wave power generation and marine power generation have no feasibility within future ten years.

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Assessment of the economic efficiency of renewable energy sources in the Khabarovsk territory

POWER AND ADMINISTRATION IN THE EAST OF RUSSIA ◽

10.22394/1818-4049-2021-94-1-219-227 ◽

2021 ◽

Vol 94 (1) ◽

pp. 219-227

Author(s):

S. G. Pankratyeva ◽

Keyword(s):

Renewable Energy ◽

Economic Efficiency ◽

Power Supply ◽

Power Plants ◽

Renewable Energy Sources ◽

Energy Sources ◽

Full Cost ◽

Cost Of Electricity ◽

Environmental Component ◽

The Cost

The study presents a brief description and problems of power supply of the Khabarovsk territory. The problems and prospects of the development of renewable energy sources, in particular in the Khabarovsk territory, are considered. There are three main approaches that exist in the scientific community for comparing energy objects. The first approach is based on comparing the technical indicators of power facilities, the second on calculating the normalized cost of electricity, and the third is based on monetizing the environmental and climatic consequences of power facilities. During the study, it was found that these approaches differ in the number of indicators included in the calculation of the cost of electricity. In accordance with the selected approaches, evaluation of economic efficiency of three operating power plants of the Khabarovsk territory – coal, diesel and solar – was carried out, monetized estimates of the full cost of three alternatives for the production of electricity in the region were given, taking into account the environmental component. The analysis made it possible to conclude that under the current market conditions, renewable energy sources are most profitable in decentralized areas, and quantitative evaluations have shown that with the introduction of payments for carbon monoxide emissions, renewable energy sources become an economically effective way of organizing energy supply in the region, including in the regions with centralized power supply.

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A Study for the Optimal Exploitation of Solar, Wind and Hydro Resources and Electrical Storage Systems in the Bormida Valley in the North of Italy

Energies ◽

10.3390/en13205291 ◽

2020 ◽

Vol 13 (20) ◽

pp. 5291

Author(s):

Stefano Bracco

Keyword(s):

Renewable Energy ◽

Wind Power ◽

Power Plants ◽

Renewable Energy Sources ◽

Green Energy ◽

Energy Sources ◽

Medium Size ◽

Low Carbon ◽

The North ◽

Wind Power Plants

The exploitation of distributed renewable energy sources leads to a low-carbon energy transition, mainly based on the optimal integration of hydro, PV and wind power plants with the remaining high-performance fossil-fuel power stations. In the last twenty years, European Union (EU) countries have shown a significant increase of the power installed in new PV and wind power plants, together with the refurbishment of small and medium size hydro stations. In particular, in Italy, PV and wind energy production has strongly increased and nowadays there are regions characterized by a very green energy mix. In this new scenario, energy storage becomes a viable solution to mitigate the variability of renewable energy sources thus optimizing the network operation. The present paper is focused on the Liguria region, in the North of Italy and in particular on the Bormida Valley where nowadays more than the half of the annual electricity consumption is covered by the renewable energy local production. The paper describes the current energy situation and proposes an optimization tool to investigate the possibility of installing new PV and wind power plants, as well as energy intensive storage units based on sodium-sulphur batteries; moreover, different scenarios are analyzed through the definition of economic and environmental key performance indicators.

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Self-generated power supply of agricultural enterprises based on renewable energy sources

E3S Web of Conferences ◽

10.1051/e3sconf/202017511009 ◽

2020 ◽

Vol 175 ◽

pp. 11009

Author(s):

Nikolay Rudenko ◽

Valery Ershov ◽

Viacheslav Evstafev

Keyword(s):

Renewable Energy ◽

Wind Power ◽

Power Supply ◽

Power Plants ◽

Renewable Energy Sources ◽

Power Installation ◽

Horizontal Wind ◽

Energy Sources ◽

Wind Power Plants ◽

Wind Power Installation

The article contains the following technical proposals for the power supply of autonomous agricultural facilities using renewable energy sources: the use of hybrid solar-wind power plants, the use of vortex wind power plants with a vertical axis to use both the energy of horizontal wind flows and the energy of upward air flows. The structure and operation algorithm of an autonomous power supply system based on a hybrid solarwind power plant and a diesel generator for autonomous agricultural facilities of small and medium power in regions where there is no distribution electric network are proposed. This system will allow for insufficient wind load to ensure reliable power supply to an autonomous agricultural facility with minimal use of diesel fuel. The design of a vortex wind power installation has been developed. The fastening on the shaft of the wind power installation of a conical helical blade with a variable radius, decreasing in the direction from the lower to the upper cut of the socket, improves the efficiency of the installation. The proposed installation makes it possible to use small winds and low-potential thermal ascending air currents, reduce low-frequency vibration and noise, and also increase the stability and efficiency of use of wind energy.

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ESTIMATION OF THE COST OF THE ELECTRICITY SUPPLY FORECAST ERROR FOR THE "GREEN" TARIFF PRODUCERS BALANCE GROUP

Praci Institutu elektrodinamiki Nacionalanoi akademii nauk Ukraini ◽

10.15407/publishing2020.57.026 ◽

2020 ◽

Vol 2020 (57) ◽

pp. 26-34

Author(s):

I. Blinov ◽

◽

E. Parus ◽

V. Miroshnyk ◽

◽

...

Keyword(s):

Renewable Energy ◽

Power Plants ◽

Forecast Error ◽

Renewable Energy Sources ◽

Real Data ◽

State Enterprise ◽

Energy Sources ◽

Electricity Supply ◽

Forecast Errors ◽

The Cost

The statistical analysis of the forecast error of the "day ahead" electricity supply volumes by the producers, which are included in the balancing group of the State Enterprise "Guaranteed Buyer”, was carried out. The distribution of forecast errors by hours of the day is determined. A simplified method for calculating the price and the total cost of the forecast error is described considering the various formulas for the cost of imbalances calculating. The potential for improving the accuracy of the forecast for increasing the permissible installed capacity of power plants with renewable energy sources with the technical means available in the power system to compensate for the power fluctuations is shown. Approbation of the methodology and calculation of quantitative indicators was carried out on real data of the total supply of renewable energy sources by producers, which were published by SE Energorynok. The calculations are of an estimate nature. Since the calculations are based on a “naive” assumption about the distribution of forecast errors, which depend on the structure of RES producers by types of primary energy carriers and specific meteorological conditions. References 11, figures 5, tables 2.

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Competitiveness of Solar and Wind Power Plants in the Countries of the Commonwealth of Independent States

ENERGETIKA Proceedings of CIS higher education institutions and power engineering associations ◽

10.21122/1029-7448-2020-63-4-301-311 ◽

2020 ◽

Vol 63 (4) ◽

pp. 301-311

Author(s):

O. V. Marchenko ◽

S. V. Solomin

Keyword(s):

Renewable Energy ◽

Central Asia ◽

Wind Power ◽

Wind Turbines ◽

Power Plants ◽

Renewable Energy Sources ◽

Energy Sources ◽

Wind Power Plants ◽

Independent States ◽

Favorable Conditions

Techno-economic indicators of renewable (solar and wind) and non-renewable energy sources are systematized, taking into account the interval of their uncertainty for the conditions of the countries of the Commonwealth of Independent States (CIS). The main attention was paid to Russia and the countries of Central Asia (Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan and Uzbekistan), where there are the most favorable conditions for the development of solar and wind energy. A comparison of renewable and non-renewable energy sources by the criterion of the cost of generated electricity has been made. It is shown that the payment for greenhouse gas emissions increases the competitiveness of solar and wind power plants in the energy markets. Under favorable conditions for renewable energy, solar and wind installations in some areas can produce cheap electricity at a cost of 3–5 cents/(kW×h). With such values, they can be competitive without additional measures to stimulate their implementation. Using the mathematical model REM-2 (Renewable Energy Model), energy sources of different types were compared taking into account system effects. The power supply system consists of photovoltaic converters, wind turbines that enable the possibility of short-term accumulation of electricity and power consumption from a backup power source. Modeling of photoelectric converters and wind turbines operating modes was performed by time (hours) for different values of solar radiation arrival and wind speed. The optimal ratios between electricity production by photovoltaic converters and wind turbines, as well as the optimal level of electricity consumption from the network under different climatic and economic conditions, were determined. The economic efficiency of joint use of solar and wind energy in the CIS countries, primarily in Russia (with the exception of the northern regions) and the countries of Central Asia, is shown.

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Analyzing Trade in Continuous Intra-Day Electricity Market: An Agent-Based Modeling Approach

Energies ◽

10.3390/en14133860 ◽

2021 ◽

Vol 14 (13) ◽

pp. 3860

Author(s):

Priyanka Shinde ◽

Ioannis Boukas ◽

David Radu ◽

Miguel Manuel de Manuel de Villena ◽

Mikael Amelin

Keyword(s):

Renewable Energy ◽

Electricity Market ◽

Power Plants ◽

Renewable Energy Sources ◽

Thermal Power ◽

Agent Based Modeling ◽

Market Liquidity ◽

Energy Sources ◽

Modeling Framework ◽

Agent Based

In recent years, the vast penetration of renewable energy sources has introduced a large degree of uncertainty into the power system, thus leading to increased trading activity in the continuous intra-day electricity market. In this paper, we propose an agent-based modeling framework to analyze the behavior and the interactions between renewable energy sources, consumers and thermal power plants in the European Continuous Intra-day (CID) market. Additionally, we propose a novel adaptive trading strategy that can be used by the agents that participate in CID market. The agents learn how to adapt their behavior according to the arrival of new information and how to react to changing market conditions by updating their willingness to trade. A comparative analysis was performed to study the behavior of agents when they adopt the proposed strategy as opposed to other benchmark strategies. The effects of unexpected outages and information asymmetry on the market evolution and the market liquidity were also investigated.

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