scholarly journals Novel grid connection interface for utility-scale PV power plants based on MMC

2019 ◽  
Vol 2019 (16) ◽  
pp. 2683-2686 ◽  
Author(s):  
Pan Wu ◽  
Wentao Huang ◽  
Nengling Tai
Keyword(s):  
Power Plants ◽  
Grid Connection ◽  
Utility Scale

Techno-economic Evaluation of Utility-Scale Power Plants Based on the Indirect sCO2 Brayton Cycle - Report

2017 ◽  
Author(s):  
Charles W. White ◽  
Walter Shelton ◽  
Nathan Weiland ◽  
Travis Shultz ◽  
John Plunkett ◽  
...  
Keyword(s):  
Economic Evaluation ◽  
Power Plants ◽  
Brayton Cycle ◽  
Utility Scale

scholarly journals Electromechanical Design of Synchronous Power Controller in Grid Integration of Renewable Power Converters to Support Dynamic Stability

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2115
Author(s):  
Mostafa Abdollahi ◽  
Jose Ignacio Candela ◽  
Andres Tarraso ◽  
Mohamed Atef Elsaharty ◽  
Elyas Rakhshani
Keyword(s):  
Dynamic Stability ◽  
Power Plants ◽  
Power Converters ◽  
Power Grids ◽  
Synchronous Generators ◽  
Power Controller ◽  
Renewable Power ◽  
Grid Connection ◽  
Control Technologies ◽  
Control Layer

Nowadays, modern power converters installed in renewable power plants can provide flexible electromechanical characteristics that rely on the developed control technologies such as Synchronous Power Controller (SPC). Since high renewable penetrated power grids result in a low-inertia system, this electromechanical characteristic provides support to the dynamic stability of active power and frequency in the power generation area. This goal can be achieved through the proper tuning of virtual electromechanical parameters that are embedded in the control layers of power converters. In this paper, a novel mathematical pattern and strategy have been proposed to adjust dynamic parameters in Renewable Static Synchronous Generators controlled by SPC (RSSG-SPC). A detailed dynamic modeling was obtained for a feasible design of virtual damping coefficient and virtual moment of inertia in the electrometrical control layer of RSSG-SPC’s power converters. Mathematical solutions, modal analysis outcomes, time-domain simulation results, and real-time validations of the test in IEEE-14B benchmark confirm that the proposed method is an effective procedure for the dynamic design of RSSG-SPC to provide these dynamic stability supports in grid connection.

Mirage in the Making

2012 ◽  
Vol 2 (3) ◽  
pp. 25-44 ◽  
Author(s):  
Peter S. Alagona ◽  
Clinton F. Smith
Keyword(s):  
Renewable Energy ◽  
Environmental History ◽  
Mojave Desert ◽  
Power Plants ◽  
Military Training ◽  
Current Debate ◽  
Cultural Resources ◽  
Solar Power Plants ◽  
Diverse Groups ◽  
Utility Scale

The Mojave Desert in California is undergoing a boom in renewable energy, mostly in the form of utility-scale solar power plants. These projects have met with resistance from diverse groups concerned about impacts on desert landscapes, ecosystems, water resources, archaeological sites, military training exercises, and other natural and cultural resources and land uses. This paper explores the current debate over renewable energy in the Mojave in the context of the region’s broader environmental history. What do Californians want from the Mojave Desert? We conclude that residents of the state want many things from the Mojave, but it remains unclear whether a desert under increasing pressure will be able to supply all of those competing demands.

Clearing the Skies of Texas

2004 ◽  
Vol 126 (09) ◽  
pp. 45-45
Keyword(s):  
Flue Gas ◽  
Power Plants ◽  
Modern Technology ◽  
Nitrogen Oxide Emissions ◽  
Combustion Technology ◽  
Dynamics Modelling ◽  
Lower Energy Density ◽  
Conventional Systems ◽  
Gas Recirculation ◽  
Utility Scale

A modern technology promises to reduce the emissions from gas-fired power plants. The solution that the John Zink Co.’s Todd Combustion Group of Shelton tested is a combustion technology that is yet to be tried in a utility-scale generation facility. The solution that the Todd engineers wanted to test was a flue gas recirculation system that differs significantly from conventional systems, which bring in the flue gas with the intake air. The new system, called COOLfuel, instead mixes the flue gas with the fuel stream, to create a gas that has a much lower energy density. Through computational fluid dynamics modelling, modifications were made to the gas nozzles and flue gas connections during normal shutdown periods to try to reduce the pressure drop due to the introduction of the flue gas. While it is expected that coal-fired power plants will be the focus of the push to lower nitrogen oxide emissions in Texas, utilities are likely to retrofit their gas-fired plants too.

Current and Future Economics of Parabolic Trough Technology

2007 ◽  
Author(s):  
Henry Price ◽  
Mark Mehos ◽  
Chuck Kutscher ◽  
Nate Blair
Keyword(s):  
Natural Gas ◽  
Power Systems ◽  
Power Plants ◽  
Solar Power ◽  
Power Market ◽  
Parabolic Trough ◽  
Cost Of Electricity ◽  
Near Term ◽  
The Cost ◽  
Utility Scale

Solar energy is the largest energy resource on the planet. Unfortunately, it is largely untapped at present, in part because sunlight is a very diffuse energy source. Concentrating solar power (CSP) systems use low cost reflectors to concentrate the sun’s energy to allow it to be used more effectively. Concentrating solar power systems are also well suited for large solar power plants that can be connected into the existing utility infrastructure. These two facts mean that CSP systems can be used to make a meaningful difference in energy supply in a relatively short period. CSP plants are best suited for the arid climates in the Southwestern United States, Northern Mexico, and many desert regions around the globe. A recent Western Governors’ Association siting study [1] found that the solar potential in the U.S. Southwest is at least 4 times the total U.S. electric demand even after eliminating urban areas, environmentally sensitive areas, and all regions with a ground slope greater than 1%.While it is currently not practical to power the whole county from the desert southwest, only a small portion of this area is needed to make a substantial contribution to future U.S. electric needs. Many of the best sites are near existing high-voltage transmission lines and close to major power load centers in the Southwest (Los Angeles, Las Vegas, and Phoenix). In addition, the power provided by CSP technologies has strong coincidence with peak electric demand, especially in the Southwest where peak demand corresponds in large part to air conditioning loads. Parabolic troughs currently represent the most cost-effective CSP technology for developing large utility-scale solar electric power systems. These systems are also one of the most mature solar technologies, with commercial utility-scale plants that have been operating for over 20 years. In addition, substantial improvements have been made to the technology in recent years including improved efficiency and the addition of thermal energy storage. The main issue for parabolic trough technology is that the cost of electricity is still higher than the cost of electricity from conventional natural gas-fired power plants. Although higher natural gas prices are helping to substantially reduce the difference between the cost of electricity from solar and natural gas plants, in the near-term increased incentives such as the 30% Investment Tax Credit (ITC) are needed to make CSP technology approach competitiveness with natural gas power on a financial basis. In the longer term, additional reductions in the cost of the technology will be necessary. This paper looks at the near-term potential for parabolic trough technology to compete with conventional fossil power resources in the firm, intermediate load power market and at the longer term potential to compete in the baseload power market. The paper will consider the potential impact of a reduced carbon emissions future.

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