This page has only limited features, please log in for full access.

Mrs. Ana Fernandez-Guillamon
Universidad Politécnica de Cartagena

Basic Info


Research Keywords & Expertise

0 Power System Analysis and Simulation
0 Renewable and Sustainable Energy
0 frequency control
0 system stabilization
0 system inertia

Fingerprints

frequency control
system inertia

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Journal article
Published: 29 April 2021 in Energies
Reads 0
Downloads 0

The organic Rankine cycle (ORC) is widely accepted to produce electricity from low-grade thermal heat sources. In fact, it is a developed technology for waste-heat to electricity conversions. In this paper, an ORC made up of super-heater, turbine, regenerator, condenser, pump, economizer and evaporator is considered. An optimization model to obtain the maximum performance of such ORC, depending on the super-heater pressure, is proposed and assessed, in order to find possible new working fluids that are less pollutant with similar behavior to those traditionally used. The different super-heater pressures under analysis lie in between the condenser pressure and 80% of the critical pressure of each working fluid, taking 100 values uniformly distributed. The system and optimization algorithm have been simulated in Matlab with the CoolProp library. Results show that the twelve working fluids can be categorized into four main groups, depending on the saturation pressure at ambient conditions (condenser pressure), observing that the fluids belonging to Group 1, which corresponds with the lower condensing pressure (around 100 kPa), provide the highest thermal efficiency, with values around η=2325%. Moreover, it is also seen that R123 can be a good candidate to substitute R141B and R11; R114 can replace R236EA and R245FA; and both R1234ZE and R1234YF have similar behavior to R134A.

ACS Style

Ana Fernández-Guillamón; Ángel Molina-García; Francisco Vera-García; José Almendros-Ibáñez. Organic Rankine Cycle Optimization Performance Analysis Based on Super-Heater Pressure: Comparison of Working Fluids. Energies 2021, 14, 2548 .

AMA Style

Ana Fernández-Guillamón, Ángel Molina-García, Francisco Vera-García, José Almendros-Ibáñez. Organic Rankine Cycle Optimization Performance Analysis Based on Super-Heater Pressure: Comparison of Working Fluids. Energies. 2021; 14 (9):2548.

Chicago/Turabian Style

Ana Fernández-Guillamón; Ángel Molina-García; Francisco Vera-García; José Almendros-Ibáñez. 2021. "Organic Rankine Cycle Optimization Performance Analysis Based on Super-Heater Pressure: Comparison of Working Fluids." Energies 14, no. 9: 2548.

Review
Published: 17 February 2021 in Renewable Energy - Technologies and Applications
Reads 0
Downloads 0

Over recent decades, the penetration of renewable energy sources (RES), especially photovoltaic and wind power plants, has been promoted in most countries. However, as these both alternative sources have power electronics at the grid interface (inverters), they are electrically decoupled from the grid. Subsequently, stability and reliability of power systems are compromised. Inertia in power systems has been traditionally determined by considering all the rotating masses directly connected to the grid. Thus, as the penetration of renewable units increases, the inertia of the power system decreases due to the reduction of directly connected rotating machines. As a consequence, power systems require a new set of strategies to include these renewable sources. In fact, ‘hidden inertia,’ ‘synthetic inertia’ and ‘virtual inertia’ are terms currently used to represent an artificial inertia created by inverter control strategies of such renewable sources. This chapter reviews the inertia concept and proposes a method to estimate the rotational inertia in different parts of the world. In addition, an extensive discussion on wind and photovoltaic power plants and their contribution to inertia and power system stability is presented.

ACS Style

Ana Fernández-Guillamón; Emilio Gómez-Lázaro; Eduard Muljadi; Ángel Molina-Garcia. A Review of Virtual Inertia Techniques for Renewable Energy-Based Generators. Renewable Energy - Technologies and Applications 2021, 1 .

AMA Style

Ana Fernández-Guillamón, Emilio Gómez-Lázaro, Eduard Muljadi, Ángel Molina-Garcia. A Review of Virtual Inertia Techniques for Renewable Energy-Based Generators. Renewable Energy - Technologies and Applications. 2021; ():1.

Chicago/Turabian Style

Ana Fernández-Guillamón; Emilio Gómez-Lázaro; Eduard Muljadi; Ángel Molina-Garcia. 2021. "A Review of Virtual Inertia Techniques for Renewable Energy-Based Generators." Renewable Energy - Technologies and Applications , no. : 1.

Journal article
Published: 06 November 2020 in Energies
Reads 0
Downloads 0

Currently, wind power is the fastest-growing means of electricity generation in the world. To obtain the maximum efficiency from the wind energy conversion system, it is important that the control strategy design is carried out in the best possible way. In fact, besides regulating the frequency and output voltage of the electrical signal, these strategies should also extract energy from wind power at the maximum level of efficiency. With advances in micro-controllers and electronic components, the design and implementation of efficient controllers are steadily improving. This paper presents a maximum power point tracking controller scheme for a small wind energy conversion system with a variable speed permanent magnet synchronous generator. With the controller, the system extracts optimum possible power from the wind speed reaching the wind turbine and feeds it to the grid at constant voltage and frequency based on the AC–DC–AC conversion system. A MATLAB/SimPowerSystems environment was used to carry out the simulations of the system. Simulation results were analyzed under variable wind speed and load conditions, exhibiting the performance of the proposed controller. It was observed that the controllers can extract maximum power and regulate the voltage and frequency under such variable conditions. Extensive results are included in the paper.

ACS Style

Tania García-Sánchez; Arbinda Mishra; Elías Hurtado-Pérez; Rubén Puché-Panadero; Ana Fernández-Guillamón. A Controller for Optimum Electrical Power Extraction from a Small Grid-Interconnected Wind Turbine. Energies 2020, 13, 5809 .

AMA Style

Tania García-Sánchez, Arbinda Mishra, Elías Hurtado-Pérez, Rubén Puché-Panadero, Ana Fernández-Guillamón. A Controller for Optimum Electrical Power Extraction from a Small Grid-Interconnected Wind Turbine. Energies. 2020; 13 (21):5809.

Chicago/Turabian Style

Tania García-Sánchez; Arbinda Mishra; Elías Hurtado-Pérez; Rubén Puché-Panadero; Ana Fernández-Guillamón. 2020. "A Controller for Optimum Electrical Power Extraction from a Small Grid-Interconnected Wind Turbine." Energies 13, no. 21: 5809.

Journal article
Published: 19 September 2020 in Sustainability
Reads 0
Downloads 0

Over the last two decades, variable renewable energy technologies (i.e., variable-speed wind turbines (VSWTs) and photovoltaic (PV) power plants) have gradually replaced conventional generation units. However, these renewable generators are connected to the grid through power converters decoupled from the grid and do not provide any rotational inertia, subsequently decreasing the overall power system’s inertia. Moreover, the variable and stochastic nature of wind speed and solar irradiation may lead to large frequency deviations, especially in isolated power systems. This paper proposes a hybrid wind–PV frequency control strategy for isolated power systems with high renewable energy source integration under variable weather conditions. A new PV controller monitoring the VSWTs’ rotational speed deviation is presented in order to modify the PV-generated power accordingly and improve the rotational speed deviations of VSWTs. The power systems modeled include thermal, hydro-power, VSWT, and PV power plants, with generation mixes in line with future European scenarios. The hybrid wind–PV strategy is compared to three other frequency strategies already presented in the specific literature, and gets better results in terms of frequency deviation (reducing the mean squared error between 20% and 95%). Additionally, the rotational speed deviation of VSWTs is also reduced with the proposed approach, providing the same mean squared error as the case in which VSWTs do not participate in frequency control. However, this hybrid strategy requires up to a 30% reduction in the PV-generated energy. Extensive detailing of results and discussion can be also found in the paper.

ACS Style

Ana Fernández-Guillamón; Guillermo Martínez-Lucas; Ángel Molina-García; Jose-Ignacio Sarasua. Hybrid Wind–PV Frequency Control Strategy under Variable Weather Conditions in Isolated Power Systems. Sustainability 2020, 12, 7750 .

AMA Style

Ana Fernández-Guillamón, Guillermo Martínez-Lucas, Ángel Molina-García, Jose-Ignacio Sarasua. Hybrid Wind–PV Frequency Control Strategy under Variable Weather Conditions in Isolated Power Systems. Sustainability. 2020; 12 (18):7750.

Chicago/Turabian Style

Ana Fernández-Guillamón; Guillermo Martínez-Lucas; Ángel Molina-García; Jose-Ignacio Sarasua. 2020. "Hybrid Wind–PV Frequency Control Strategy under Variable Weather Conditions in Isolated Power Systems." Sustainability 12, no. 18: 7750.

Journal article
Published: 06 August 2020 in Energies
Reads 0
Downloads 0

Wind power plants depend greatly on weather conditions, thus being considered intermittent, uncertain and non-dispatchable. Due to the massive integration of this energy resource in the recent decades, it is important that transmission and distribution system operators are able to model their electrical behaviour in terms of steady-state power flow, transient dynamic stability, and short-circuit currents. Consequently, in 2015, the International Electrotechnical Commission published Standard IEC 61400-27-1, which includes generic models for wind power generation in order to estimate the electrical characteristics of wind turbines at the connection point. This paper presents, describes and details the models for wind turbine topologies Types 1 and 2 following IEC 61400-27-1 for electrical simulation purposes, including the values for the parameters for the different subsystems. A hardware-in-the-loop combined with a real-time simulator is also used to analyse the response of such wind turbine topologies under voltage dips. The evolution of active and reactive powers is discussed, together with the wind turbine rotor and generator rotational speeds.

ACS Style

Tania García-Sánchez; Irene Muñoz-Benavente; Emilio Gómez-Lázaro; Ana Fernández-Guillamón. Modelling Types 1 and 2 Wind Turbines Based on IEC 61400-27-1: Transient Response under Voltage Dips. Energies 2020, 13, 4078 .

AMA Style

Tania García-Sánchez, Irene Muñoz-Benavente, Emilio Gómez-Lázaro, Ana Fernández-Guillamón. Modelling Types 1 and 2 Wind Turbines Based on IEC 61400-27-1: Transient Response under Voltage Dips. Energies. 2020; 13 (16):4078.

Chicago/Turabian Style

Tania García-Sánchez; Irene Muñoz-Benavente; Emilio Gómez-Lázaro; Ana Fernández-Guillamón. 2020. "Modelling Types 1 and 2 Wind Turbines Based on IEC 61400-27-1: Transient Response under Voltage Dips." Energies 13, no. 16: 4078.

Journal article
Published: 01 July 2020 in Energies
Reads 0
Downloads 0

The lack of synchronous inertia, associated with the relevant penetration of variable speed wind turbines (VSWTs) into isolated power systems, has increased their vulnerability to strong frequency deviations. In fact, the activation of load shedding schemes is a common practice when an incident occurs, i.e., the outage of a conventional unit. Under this framework, wind power plants should actively contribute to frequency stability and grid reliability. However, the contribution of VSWTs to frequency regulation involves several drawbacks related to their efficiency and equipment wear due to electrical power requirements, rotational speed changes, and subsequently, shaft torque oscillations. As a result, wind energy producers are not usually willing to offer such frequency regulation. In this paper, a new control technique is proposed to optimize the frequency response of wind power plants after a power imbalanced situation. The proposed frequency controller depends on different power system parameters through a linear regression to determine the contribution of wind power plants for each imbalance condition. As a consequence, VSWTs frequency contribution is estimated to minimize their mechanical and electrical efforts, thus reducing their equipment wear. A group of sixty supply-side and imbalance scenarios are simulated and analyzed. Results of the case study are compared to previous proposals. The proposed adaptive control reduces the maximum torque and rotational speed variations while at the same time maintaining similar values of the load shedding program. Extensive results and discussion are included in the paper.

ACS Style

Ana Fernández-Guillamón; Guillermo Martínez-Lucas; Ángel Molina-García; Jose Ignacio Sarasua. An Adaptive Control Scheme for Variable Speed Wind Turbines Providing Frequency Regulation in Isolated Power Systems with Thermal Generation. Energies 2020, 13, 3369 .

AMA Style

Ana Fernández-Guillamón, Guillermo Martínez-Lucas, Ángel Molina-García, Jose Ignacio Sarasua. An Adaptive Control Scheme for Variable Speed Wind Turbines Providing Frequency Regulation in Isolated Power Systems with Thermal Generation. Energies. 2020; 13 (13):3369.

Chicago/Turabian Style

Ana Fernández-Guillamón; Guillermo Martínez-Lucas; Ángel Molina-García; Jose Ignacio Sarasua. 2020. "An Adaptive Control Scheme for Variable Speed Wind Turbines Providing Frequency Regulation in Isolated Power Systems with Thermal Generation." Energies 13, no. 13: 3369.

Journal article
Published: 11 April 2020 in International Journal of Electrical Power & Energy Systems
Reads 0
Downloads 0

The relevant integration of wind power into the grid has involved a remarkable impact on power system operation, mainly in terms of security and reliability due to the inherent loss of the rotational inertia as a consequence of such new generation units decoupled from the grid. In these weak scenarios, the contribution of wind turbines to frequency control is considered as a suitable solution to improve system stability. With regard to frequency response analysis and grid stability, most contributions introduce wind control discuss generation tripping for isolated power systems under arbitrary power imbalance conditions. Frequency response is then analyzed for hypothetical imbalances usually ranged between 5% and 20%, and assuming averaged energy schedule scenarios. In this paper, a more realistic framework is proposed to evaluate frequency deviations by including high wind power integration. With this aim, unit commitment schemes and frequency load shedding are considered in this work for frequency response analysis under high wind power penetration. The Gran Canaria Island’s isolated power system (Spain) is used for evaluation purposes. Results provide a variety of influences from wind frequency control depending not only on the wind power integration, but also the generation units under operation, the rotational inertia reductions as well as the available reserves from each resource, aspects that have not been addressed previously in the specific literature to evaluate frequency excursions under high wind power integration.

ACS Style

Ana Fernández-Guillamón; José Ignacio Sarasúa; Manuel Chazarra; Antonio Vigueras-Rodríguez; Daniel Fernández Muñoz; Ángel Molina-García. Frequency control analysis based on unit commitment schemes with high wind power integration: A Spanish isolated power system case study. International Journal of Electrical Power & Energy Systems 2020, 121, 106044 .

AMA Style

Ana Fernández-Guillamón, José Ignacio Sarasúa, Manuel Chazarra, Antonio Vigueras-Rodríguez, Daniel Fernández Muñoz, Ángel Molina-García. Frequency control analysis based on unit commitment schemes with high wind power integration: A Spanish isolated power system case study. International Journal of Electrical Power & Energy Systems. 2020; 121 ():106044.

Chicago/Turabian Style

Ana Fernández-Guillamón; José Ignacio Sarasúa; Manuel Chazarra; Antonio Vigueras-Rodríguez; Daniel Fernández Muñoz; Ángel Molina-García. 2020. "Frequency control analysis based on unit commitment schemes with high wind power integration: A Spanish isolated power system case study." International Journal of Electrical Power & Energy Systems 121, no. : 106044.

Journal article
Published: 07 November 2019 in Journal of Marine Science and Engineering
Reads 0
Downloads 0

Nowadays, wind is considered as a remarkable renewable energy source to be implemented in power systems. Most wind power plant experiences have been based on onshore installations, as they are considered as a mature technological solution by the electricity sector. However, future power scenarios and roadmaps promote offshore power plants as an alternative and additional power generation source, especially in some regions such as the North and Baltic seas. According to this framework, the present paper discusses and reviews trends and perspectives of offshore wind power plants for massive offshore wind power integration into future power systems. Different offshore trends, including turbine capacity, wind power plant capacity as well as water depth and distance from the shore, are discussed. In addition, electrical transmission high voltage alternating current (HVAC) and high voltage direct current (HVDC) solutions are described by considering the advantages and technical limitations of these alternatives. Several future advancements focused on increasing the offshore wind energy capacity currently under analysis are also included in the paper.

ACS Style

Ana Fernández-Guillamón; Kaushik Das; Nicolaos A. Cutululis; Ángel Molina-García. Offshore Wind Power Integration into Future Power Systems: Overview and Trends. Journal of Marine Science and Engineering 2019, 7, 399 .

AMA Style

Ana Fernández-Guillamón, Kaushik Das, Nicolaos A. Cutululis, Ángel Molina-García. Offshore Wind Power Integration into Future Power Systems: Overview and Trends. Journal of Marine Science and Engineering. 2019; 7 (11):399.

Chicago/Turabian Style

Ana Fernández-Guillamón; Kaushik Das; Nicolaos A. Cutululis; Ángel Molina-García. 2019. "Offshore Wind Power Integration into Future Power Systems: Overview and Trends." Journal of Marine Science and Engineering 7, no. 11: 399.

Journal article
Published: 03 November 2019 in Journal of Marine Science and Engineering
Reads 0
Downloads 0

Wind power is widely considered to be a qualified renewable, clean, ecological and inexhaustible resource that is becoming a leader in the current energy transition process. It is a mature technology solution that was quickly developed and has been massively integrated into power systems in recent years. Indeed, a remarkable number of renewable integration policies have been promoted by different governments and countries. With the aim of maximizing the power given by wind resources, the locations of both onshore and offshore wind power plants must be optimized following a sort of different criteria. Under this scenario, a number of factors and decision criteria in the evaluation and selection of locations can be identified. Moreover, the relevant wind power increasing in the power generation mix is addressed, along with a standardization of factors and decision criteria in the optimization and selection of such optimal locations. In this context, this paper describes a systematic review and meta-analysis combining most of the contributions and studies proposed during the last decade. Thus, our aim is focused on reviewing and categorizing all factors to be considered for optimal location estimation, pointing out the differences among the selected factors and the decision criteria for onshore and offshore wind power plants. In addition, our review also includes an analysis of the representative key indicators for the contributions, such as the annual frequency of publications, geographical classification, analysis by category, evaluation method and determining factors.

ACS Style

Isabel C. Gil-García; M. Socorro García-Cascales; Ana Fernández-Guillamón; Angel Molina-García. Categorization and Analysis of Relevant Factors for Optimal Locations in Onshore and Offshore Wind Power Plants: A Taxonomic Review. Journal of Marine Science and Engineering 2019, 7, 391 .

AMA Style

Isabel C. Gil-García, M. Socorro García-Cascales, Ana Fernández-Guillamón, Angel Molina-García. Categorization and Analysis of Relevant Factors for Optimal Locations in Onshore and Offshore Wind Power Plants: A Taxonomic Review. Journal of Marine Science and Engineering. 2019; 7 (11):391.

Chicago/Turabian Style

Isabel C. Gil-García; M. Socorro García-Cascales; Ana Fernández-Guillamón; Angel Molina-García. 2019. "Categorization and Analysis of Relevant Factors for Optimal Locations in Onshore and Offshore Wind Power Plants: A Taxonomic Review." Journal of Marine Science and Engineering 7, no. 11: 391.

Research article
Published: 23 October 2019 in IET Renewable Power Generation
Reads 0
Downloads 0

Nowadays, power system inertia is changing as a consequence of replacing conventional units by renewable energy sources, mainly wind and photovoltaic power plants. This fact affects significantly the grid frequency response under power imbalances. As a result, new frequency control strategies for renewable plants are being developed to emulate the behaviour of conventional power plants under such contingencies. These approaches are usually called ‘virtual inertia emulation techniques’. In this study, an analysis of power system inertia estimation from frequency excursions is carried out by considering different inertia estimation methodologies, discussing the applicability and coherence of these methodologies under the new supply-side circumstances. The modelled power system involves conventional units and wind power plants including wind frequency control strategies in line with current mix generation scenarios. Results show that all methodologies considered provide an accurate result to estimate the equivalent inertia based on rotational generation units directly connected to the grid. However, significant discrepancies are found when frequency control strategies are included in wind power plants decoupled from the grid. In this way, authors consider that it is necessary to define alternative inertia estimation methodologies by including virtual inertia emulation. Extensive discussion and results are also provided in this study.

ACS Style

Ana Fernández‐Guillamón; Antonio Vigueras‐Rodríguez; Ángel Molina‐García. Analysis of power system inertia estimation in high wind power plant integration scenarios. IET Renewable Power Generation 2019, 13, 2807 -2816.

AMA Style

Ana Fernández‐Guillamón, Antonio Vigueras‐Rodríguez, Ángel Molina‐García. Analysis of power system inertia estimation in high wind power plant integration scenarios. IET Renewable Power Generation. 2019; 13 (15):2807-2816.

Chicago/Turabian Style

Ana Fernández‐Guillamón; Antonio Vigueras‐Rodríguez; Ángel Molina‐García. 2019. "Analysis of power system inertia estimation in high wind power plant integration scenarios." IET Renewable Power Generation 13, no. 15: 2807-2816.

Review
Published: 09 September 2019 in Renewable and Sustainable Energy Reviews
Reads 0
Downloads 0

Traditionally, inertia in power systems has been determined by considering all the rotating masses directly connected to the grid. During the last decade, the integration of renewable energy sources, mainly photovoltaic installations and wind power plants, has led to a significant dynamic characteristic change in power systems. This change is mainly due to the fact that most renewables have power electronics at the grid interface. The overall impact on stability and reliability analysis of power systems is very significant. The power systems become more dynamic and require a new set of strategies modifying traditional generation control algorithms. Indeed, renewable generation units are decoupled from the grid by electronic converters, decreasing the overall inertia of the grid. ‘Hidden inertia’, ‘synthetic inertia’ or ‘virtual inertia’ are terms currently used to represent artificial inertia created by converter control of the renewable sources. Alternative spinning reserves are then needed in the new power system with high penetration renewables, where the lack of rotating masses directly connected to the grid must be emulated to maintain an acceptable power system reliability. This paper reviews the inertia concept in terms of values and their evolution in the last decades, as well as the damping factor values. A comparison of the rotational grid inertia for traditional and current averaged generation mix scenarios is also carried out. In addition, an extensive discussion on wind and photovoltaic power plants and their contributions to inertia in terms of frequency control strategies is included in the paper.

ACS Style

Ana Fernández-Guillamón; Emilio Gómez-Lázaro; Eduard Muljadi; Ángel Molina-García. Power systems with high renewable energy sources: A review of inertia and frequency control strategies over time. Renewable and Sustainable Energy Reviews 2019, 115, 109369 .

AMA Style

Ana Fernández-Guillamón, Emilio Gómez-Lázaro, Eduard Muljadi, Ángel Molina-García. Power systems with high renewable energy sources: A review of inertia and frequency control strategies over time. Renewable and Sustainable Energy Reviews. 2019; 115 ():109369.

Chicago/Turabian Style

Ana Fernández-Guillamón; Emilio Gómez-Lázaro; Eduard Muljadi; Ángel Molina-García. 2019. "Power systems with high renewable energy sources: A review of inertia and frequency control strategies over time." Renewable and Sustainable Energy Reviews 115, no. : 109369.

Journal article
Published: 04 May 2019 in Energies
Reads 0
Downloads 0

An alternative approach for combined frequency control in multi-area power systems with significant wind power plant integration is described and discussed in detail. Demand response is considered as a decentralized and distributed resource by incorporating innovative frequency-sensitive load controllers into certain thermostatically controlled loads. Wind power plants comprising variable speed wind turbines include an auxiliary frequency control loop contributing to increase total system inertia in a combined manner, which further improves the system frequency performance. Results for interconnected power systems show how the proposed control strategy substantially improves frequency stability and decreases peak frequency excursion (nadir) values. The total need for frequency regulation reserves is reduced as well. Moreover, the requirements to exchange power in multi-area scenarios are significantly decreased. Extensive simulations under power imbalance conditions for interconnected power systems are also presented in the paper.

ACS Style

Irene Muñoz-Benavente; Anca D. Hansen; Emilio Gómez-Lázaro; Tania García-Sánchez; Ana Fernández-Guillamón; Ángel Molina-García. Impact of Combined Demand-Response and Wind Power Plant Participation in Frequency Control for Multi-Area Power Systems. Energies 2019, 12, 1687 .

AMA Style

Irene Muñoz-Benavente, Anca D. Hansen, Emilio Gómez-Lázaro, Tania García-Sánchez, Ana Fernández-Guillamón, Ángel Molina-García. Impact of Combined Demand-Response and Wind Power Plant Participation in Frequency Control for Multi-Area Power Systems. Energies. 2019; 12 (9):1687.

Chicago/Turabian Style

Irene Muñoz-Benavente; Anca D. Hansen; Emilio Gómez-Lázaro; Tania García-Sánchez; Ana Fernández-Guillamón; Ángel Molina-García. 2019. "Impact of Combined Demand-Response and Wind Power Plant Participation in Frequency Control for Multi-Area Power Systems." Energies 12, no. 9: 1687.

Journal article
Published: 01 March 2019 in IEEE Access
Reads 0
Downloads 0

Wind power plants are becoming a generally accepted resource in the generation mix of many utilities. At the same time, the size and the power rating of individual wind turbines have increased considerably. Under these circumstances, the sector is increasingly demanding an accurate characterization of vertical wind speed profiles to estimate properly the incoming wind speed at the rotor swept area and, consequently, assess the potential for a wind power plant site. The present paper describes a shape-based clustering characterization and visualization of real vertical wind speed data. The proposed solution allows us to identify the most likely vertical wind speed patterns for a specific location based on real wind speed measurements. Moreover, this clustering approach also provides characterization and classification of such vertical wind profiles. This solution is highly suitable for a large amount of data collected by remote sensing equipment, where wind speed values at different heights within the rotor swept area are available for subsequent analysis. The methodology is based on z-normalization, shape-based distance metric solution and the Ward-hierarchical clustering method. Real vertical wind speed profile data corresponding to a Spanish wind power plant and collected by using a commercialWindcube equipment during several months are used to assess the proposed characterization and clustering process, involving more than 100000 wind speed data values. All analyses have been implemented using open-source R-software. From the results, at least four different vertical wind speed patterns are identified to characterize properly over 90% of the collected wind speed data along the day. Therefore, alternative analytical function criteria should be subsequently proposed for vertical wind speed characterization purposes.

ACS Style

Angel Molina-Garcia; Ana Fernandez-Guillamon; Emilio Gomez-Lazaro; Andres Honrubia-Escribano; Maria C. Bueso. Vertical Wind Profile Characterization and Identification of Patterns Based on a Shape Clustering Algorithm. IEEE Access 2019, 7, 30890 -30904.

AMA Style

Angel Molina-Garcia, Ana Fernandez-Guillamon, Emilio Gomez-Lazaro, Andres Honrubia-Escribano, Maria C. Bueso. Vertical Wind Profile Characterization and Identification of Patterns Based on a Shape Clustering Algorithm. IEEE Access. 2019; 7 (99):30890-30904.

Chicago/Turabian Style

Angel Molina-Garcia; Ana Fernandez-Guillamon; Emilio Gomez-Lazaro; Andres Honrubia-Escribano; Maria C. Bueso. 2019. "Vertical Wind Profile Characterization and Identification of Patterns Based on a Shape Clustering Algorithm." IEEE Access 7, no. 99: 30890-30904.

Journal article
Published: 16 October 2018 in Energies
Reads 0
Downloads 0

The integration of renewables into power systems involves significant targets and new scenarios with an important role for these alternative resources, mainly wind and PV power plants. Among the different objectives, frequency control strategies and new reserve analysis are currently considered as a major concern in power system stability and reliability studies. This paper aims to provide an analysis of multi-area power systems submitted to power imbalances, considering a high wind power penetration in line with certain European energy road-maps. Frequency control strategies applied to wind power plants from different areas are studied and compared for simulation purposes, including conventional generation units. Different parameters, such as nadir values, stabilization time intervals and tie-line active power exchanges are also analyzed. Detailed generation unit models are included in the paper. The results provide relevant information on the influence of multi-area scenarios on the global frequency response, including participation of wind power plants in system frequency control.

ACS Style

Ana Fernández-Guillamón; Antonio Vigueras-Rodríguez; Emilio Gómez-Lázaro; Ángel Molina-García. Fast Power Reserve Emulation Strategy for VSWT Supporting Frequency Control in Multi-Area Power Systems. Energies 2018, 11, 2775 .

AMA Style

Ana Fernández-Guillamón, Antonio Vigueras-Rodríguez, Emilio Gómez-Lázaro, Ángel Molina-García. Fast Power Reserve Emulation Strategy for VSWT Supporting Frequency Control in Multi-Area Power Systems. Energies. 2018; 11 (10):2775.

Chicago/Turabian Style

Ana Fernández-Guillamón; Antonio Vigueras-Rodríguez; Emilio Gómez-Lázaro; Ángel Molina-García. 2018. "Fast Power Reserve Emulation Strategy for VSWT Supporting Frequency Control in Multi-Area Power Systems." Energies 11, no. 10: 2775.

Journal article
Published: 04 June 2018 in Energies
Reads 0
Downloads 0

This paper presents a new frequency controller for variable speed wind turbines connected to the grid under power imbalance conditions. It is based on the fast power reserve emulation technique, having two different operation modes: overproduction and recovery mode. In the first mode, the active power provided by wind turbines is set over the mechanical power, reducing their rotational speed. This overproduction power is estimated according to the frequency excursion. In the second mode, the active power is established under the mechanical power to recover the initial rotational speed through a smooth trajectory. The power system considered for simulation purposes includes thermal, hydro-power and wind-power plants. The controller proposed has been evaluated under different mix-generation scenarios implemented in Matlab/Simulink. Extensive results and comparison to previous proposals are also included in the paper.

ACS Style

Ana Fernández-Guillamón; Jorge Villena-Lapaz; Antonio Vigueras-Rodriguez; Tania Garcia-Sanchez; Angel Molina-García. An Adaptive Frequency Strategy for Variable Speed Wind Turbines: Application to High Wind Integration Into Power Systems. Energies 2018, 11, 1436 .

AMA Style

Ana Fernández-Guillamón, Jorge Villena-Lapaz, Antonio Vigueras-Rodriguez, Tania Garcia-Sanchez, Angel Molina-García. An Adaptive Frequency Strategy for Variable Speed Wind Turbines: Application to High Wind Integration Into Power Systems. Energies. 2018; 11 (6):1436.

Chicago/Turabian Style

Ana Fernández-Guillamón; Jorge Villena-Lapaz; Antonio Vigueras-Rodriguez; Tania Garcia-Sanchez; Angel Molina-García. 2018. "An Adaptive Frequency Strategy for Variable Speed Wind Turbines: Application to High Wind Integration Into Power Systems." Energies 11, no. 6: 1436.