Identification of Energy Storage Capacities Within Large-Scale Power Plants and Development of Control Strategies to Increase Marketable Grid Services

2015 ◽  
Author(s):  
Moritz Huebel ◽  
Juergen Nocke ◽  
Sebastian Meinke ◽  
Egon Hassel
Keyword(s):  
Energy Storage ◽  
Power Plants ◽  
Large Scale ◽  
Control Strategies ◽  
Electrical Grid ◽  
Additional Control ◽  
Dynamic Simulation Model ◽  
Future Demands ◽  
Critical Components ◽  
Dynamic Investigation

In order to meet future demands, existing and new plants need to be optimized to offer additional control reserves to stabilize an electrical grid, which is highly penetrated by fluctuating renewables. Since this requires a dynamic investigation, transient physical based models of different power plants have been developed to evaluate effects of increased flexibility as well as to develop optimization strategies. The approach has been tested for a specific 500 MW lignite-fired power plant. It includes detailed modeling of the incorporated sub-systems and their interactions as well as the implementation of the power plant’s control system. The dynamic simulation model is used for the identification of energy storage potentials within the process and for testing and developing control strategies in order to increase flexibility and marketable output of the process. The strategies are benchmarked and evaluated based on the consideration of exergetic efficiency and lifetime-consumption of critical components.

scholarly journals Sizing and Management of Energy Storage Systems in Large-Scale Power Plants Using Price Control and Artificial Intelligence

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3296
Author(s):  
Carlos García-Santacruz ◽  
Luis Galván ◽  
Juan M. Carrasco ◽  
Eduardo Galván
Keyword(s):  
Energy Storage ◽  
Power Plants ◽  
Large Scale ◽  
Storage Systems ◽  
Renewable Energy Sources ◽  
Ancillary Services ◽  
Energy Sources ◽  
Energy Storage Systems ◽  
Electric System ◽  
Fundamental Part

Energy storage systems are expected to play a fundamental part in the integration of increasing renewable energy sources into the electric system. They are already used in power plants for different purposes, such as absorbing the effect of intermittent energy sources or providing ancillary services. For this reason, it is imperative to research managing and sizing methods that make power plants with storage viable and profitable projects. In this paper, a managing method is presented, where particle swarm optimisation is used to reach maximum profits. This method is compared to expert systems, proving that the former achieves better results, while respecting similar rules. The paper further presents a sizing method which uses the previous one to make the power plant as profitable as possible. Finally, both methods are tested through simulations to show their potential.

A review of energy storage technologies for large scale photovoltaic power plants

2020 ◽  
Vol 274 ◽  
pp. 115213 ◽  
Author(s):  
Eduard Bullich-Massagué ◽  
Francisco-Javier Cifuentes-García ◽  
Ignacio Glenny-Crende ◽  
Marc Cheah-Mañé ◽  
Mònica Aragüés-Peñalba ◽  
...  
Keyword(s):  
Energy Storage ◽  
Power Plants ◽  
Large Scale ◽  
Photovoltaic Power ◽  
Storage Technologies

Effect of Design Parameters on the Performance of Thermal Energy Storage Systems

Solar Energy ◽  
2004 ◽  
Author(s):  
Gregor P. Henze
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Large Scale ◽  
Control Strategies ◽  
Storage System ◽  
Operating Cost ◽  
Energy Storage System ◽  
Design Parameters ◽  
Wide Range

This paper describes simulation-based results of a large-scale investigation of a commercial cooling plant including a thermal energy storage system. A cooling plant with an ice-on-coil system with external melt and a reciprocating compressor operating in a large office building was analyzed under four different control strategies. Optimal control as the strategy that minimizes the total operating cost (demand and energy charges) served as a benchmark to assess the performance of the three conventional controls. However, all control strategies depend on properly selected design parameters. The storage and chiller capacities as the primary design parameters were varied over a wide range and the dependence of the system’s cost saving performance on these parameters was evaluated.

A Perspective on Energy Storage and Other Means to Integrate Increasing Shares of Renewable Electricity Generation

Green ◽  
2014 ◽  
Vol 4 (1-6) ◽  
Author(s):  
Arndt Neuhaus ◽  
Frank-Detlef Drake ◽  
Gunnar Hoffmann ◽  
Friedrich Schulte
Keyword(s):  
Energy Storage ◽  
Power Plants ◽  
Large Scale ◽  
Distributed Storage ◽  
Renewable Energy Sources ◽  
Energy Transition ◽  
System Stability ◽  
Small Scale ◽  
Specific Class ◽  
High Level

AbstractThe transition to a sustainable electricity supply from renewable energy sources (RES) imposes major technical and economic challenges upon market players and the legislator. In particular the rapid growth of volatile wind power and photovoltaic generation requires a high level of flexibility of the entire electricity system, therefore major investments in infrastructures are needed to maintain system stability. This raises the important question about the role that central large-scale energy storage and/or small-scale distributed storage (“energy storage at home”) are going to play in the energy transition. Economic analyses show that the importance of energy storage is going to be rather limited in the medium term. Especially competing options like intelligent grid extension and flexible operation of power plants are expected to remain favourable. Nonetheless additional storage capacities are required if the share of RES substantially exceeds 50% in the long term. Due to the fundamental significance of energy storages, R&D considers a broad variety of types each suitable for a specific class of application.

scholarly journals Predictive Maintenance for Pump Systems and Thermal Power Plants: State-of-the-Art Review, Trends and Challenges

Sensors ◽  
2020 ◽  
Vol 20 (8) ◽  
pp. 2425 ◽  
Author(s):  
Jonas Fausing Olesen ◽  
Hamid Reza Shaker
Keyword(s):  
Power Plants ◽  
Large Scale ◽  
Health Management ◽  
Thermal Power ◽  
Predictive Maintenance ◽  
Data Driven ◽  
Thermal Power Plants ◽  
Broad Concept ◽  
Automatic Maintenance ◽  
Critical Components

Thermal power plants are an important asset in the current energy infrastructure, delivering ancillary services, power, and heat to their respective consumers. Faults on critical components, such as large pumping systems, can lead to material damage and opportunity losses. Pumps plays an essential role in various industries and as such clever maintenance can ensure cost reductions and high availability. Prognostics and Health Management, PHM, is the study utilizing data to estimate the current and future conditions of a system. Within the field of PHM, Predictive Maintenance, PdM, has been gaining increased attention. Data-driven models can be built to estimate the remaining-useful-lifetime of complex systems that would be difficult to identify by man. With the increased attention that the Predictive Maintenance field is receiving, review papers become increasingly important to understand what research has been conducted and what challenges need to be addressed. This paper does so by initially conceptualising the PdM field. A structured overview of literature in regard to application within PdM is presented, before delving into the domain of thermal power plants and pump systems. Finally, related challenges and trends will be outlined. This paper finds that a large number of experimental data-driven models have been successfully deployed, but the PdM field would benefit from more industrial case studies. Furthermore, investigations into the scale-ability of models would benefit industries that are looking into large-scale implementations. Here, examining a method for automatic maintenance of the developed model will be of interest. This paper can be used to understand the PdM field as a broad concept but does also provide a niche understanding of the domain in focus.

Integrating Patient Consent in e-Health Access Control

2011 ◽  
Vol 2 (2) ◽  
pp. 1-24 ◽  
Author(s):  
Kim Wuyts ◽  
Riccardo Scandariato ◽  
Griet Verhenneman ◽  
Wouter Joosen
Keyword(s):  
Access Control ◽  
Large Scale ◽  
Control Strategies ◽  
Medical Data ◽  
Health Access ◽  
Loss Of Control ◽  
Proof Of Concept ◽  
Additional Control ◽  
Patient Consent ◽  
Control Service

Many initiatives exist that integrate e-health systems on a large scale. One of the main technical challenges is access control, although several frameworks and solutions, like XACML, are becoming standard practice. Data is no longer shared within one affinity domain but becomes ubiquitous, which results in a loss of control. As patients will be less willing to participate without additional control strategies, patient consents are introduced that allow the patients to determine precise access rules on their medical data. This paper explores the consequences of integrating consent in e-health access control. First, consent requirements are examined, after which an architecture is proposed which incorporates patient consent in the access control service of an e-health system. To validate the proposed concepts, a proof-of-concept implementation is built and evaluated.

scholarly journals Power Quality Assessment of Grid-Connected PV System in Compliance with the Recent Integration Requirements

Electronics ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 366 ◽  
Author(s):  
Ali Q. Al-Shetwi ◽  
M A Hannan ◽  
Ker Pin Jern ◽  
Ammar A. Alkahtani ◽  
A. E. PG Abas
Keyword(s):  
Power Quality ◽  
Power Plants ◽  
Large Scale ◽  
Low Voltage ◽  
Control Strategies ◽  
Frequency Variation ◽  
Pv System ◽  
Current Harmonics ◽  
Dynamic Voltage ◽  
Voltage Flicker

The generation and integration of photovoltaic power plants (PVPPs) into the utility grid have increased dramatically over the past two decades. In this sense, and to ensure a high quality of the PVPPs generated power as well as a contribution on the power system security and stability, some of the new power quality requirements imposed by different grid codes and standards in order to regulate the installation of PVPPs and ensure the grid stability. This study aims to investigate the recent integration requirements including voltage sag, voltage flicker, harmonics, voltage unbalance, and frequency variation. Additionally, compliance controls and methods to fulfill these requirements are developed. In line with this, a large-scale three-phase grid-connected PVPP is designed. A modified inverter controller without the use of any extra device is designed to mitigate the sage incidence and achieve the low-voltage ride-through requirement. It can efficiently operate at normal conditions and once sag or faults are detected, it can change the mode of operation and inject a reactive current based on the sag depth. A dynamic voltage regulator and its controller are also designed to control the voltage flicker, fluctuation, and unbalance at the point of common coupling between the PVPP and the grid. The voltage and current harmonics are reduced below the specified limits using proper design and a RLC filter. The obtained results show that the proposed controller fulfilled the recent standard requirements in mitigating power quality (PQ) events. Thus, this study can increase the effort towards the development of smooth PVPP integration by optimizing the design, operation and control strategies towards high PQ and green electricity.

scholarly journals Emission trends and mitigation options for air pollutants in East Asia

2014 ◽  
Vol 14 (2) ◽  
pp. 2601-2674 ◽  
Author(s):  
S. X. Wang ◽  
B. Zhao ◽  
S. Y. Cai ◽  
Z. Klimont ◽  
C. Nielsen ◽  
...  
Keyword(s):  
East Asia ◽  
Air Pollutants ◽  
Power Plants ◽  
Large Scale ◽  
Control Strategies ◽  
Cement Industry ◽  
Control Measures ◽  
Atmospheric Environment ◽  
So2 Emissions ◽  
High Efficient

Abstract. Emissions of air pollutants in East Asia play an important role in the regional and global atmospheric environment. In this study we evaluated the recent emission trends of sulfur dioxide (SO2), nitrogen oxides (NOx), particulate matters (PM), and non-methane volatile organic compounds (NMVOC) in East Asia, and projected their future emissions up to 2030 with six emission scenarios. The results will provide future emission projections for the modeling community of the model inter-comparison program for Asia (MICS-Asia). During 2005–2010, the emissions of SO2 and PM2.5 in East Asia decreased by 15 % and 11%, respectively, mainly attributable to the large scale deployment of FGD for China's power plants, and the promotion of high-efficient PM removal technologies in China's power plants and cement industry. During this period, the emissions of NOx and NMVOC increased by 25% and 15%, driven by the rapid increase in the emissions from China owing to inadequate control strategies. In contrast, the NOx and NMVOC emissions in East Asia except China decreased by 13–17% mainly due to the implementation of tight vehicle emission standards in Japan and South Korea. Under current legislation and current implementation status, NOx, SO2, and NMVOC emissions in East Asia are estimated to increase by about one quarter by 2030 from the 2010 levels, while PM2.5 emissions are expected to decrease by 7%. Assuming enforcement of new energy-saving policies, emissions of NOx, SO2, PM2.5 and NMVOC in East Asia are expected to decrease by 28%, 36%, 28%, and 15% respectively compared with the baseline case. The implementation of the "progressive" end-of-pipe control measures is expected to lead to another one third reduction of the baseline emissions of NOx, and about one quarter reduction for SO2, PM2.5, and NMVOC. With the full implementation of maximum feasible reduction measures, the emissions of NOx, SO2, and PM2.5 in East Asia are expected to account for only about one quarter and NMVOC for one third of the levels of the baseline projection. Compared with previous projections, this study projects larger reduction in NOx and SO2 emissions by considering aggressive govermental plans and standards scheduled to be implemented in the next decade, and quantifies the significant effects of detailed progressive control measures on NMVOC emissions up to 2030.

scholarly journals Grid-forming control strategies for blackstart by offshore wind farms

2020 ◽  
Author(s):  
Anubhav Jain ◽  
Jayachandra N. Sakamuri ◽  
Nicolaos A. Cutululis
Keyword(s):  
Power System ◽  
Wind Power ◽  
Power Plants ◽  
Large Scale ◽  
Wind Farm ◽  
Control Strategies ◽  
Renewable Energy Sources ◽  
Stability Limit ◽  
Offshore Wind ◽  
Wind Power Plants

Abstract. Large-scale integration of renewable energy sources with power-electronic converters is pushing the power system closer to its dynamic stability limit. This has increased the risk of wide-area blackouts. Thus, the changing generation profile in the power system necessitates the use of alternate sources of energy such as wind power plants, to provide blackstart services in the future. This however, requires grid-forming and not the traditionally prevalent grid-following wind turbines. In this paper, four different grid-forming control strategies have been implemented in an HVDC-connected wind farm. A simulation study has been carried out to test the different control schemes for the different stages of energization of onshore load by the wind farm. Their transient behaviour during transformer inrush, converter pre-charge and de-blocking, and onshore block-load pickup, has been compared to demonstrate the blackstart capabilities of grid-forming wind power plants for early participation in power system restoration.

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