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

Dr. Guillermo Martinez - Lucas
Universidad Politécnica de Madrid

Basic Info


Research Keywords & Expertise

0 Energy Storage
0 Hydropower
0 Wind Energy
0 Power System Control
0 Renewable energies

Fingerprints

Hydropower
frequency control
Wind Energy
Energy Storage

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: 31 January 2021 in International Journal of Electrical Power & Energy Systems
Reads 0
Downloads 0

The activation of the load shedding programs in the six isolated power systems belonging to Canary Archipelago has not been uncommon in last years. These power systems have been increasing the penetration of renewable power generation technologies, which are mainly decoupled from the grid through a power electronic converter and not being able to respond naturally to frequency drops. Common Under Frequency Load Shedding programs are activated when a relevant incident, as the outage of a generation unit, takes place. This work analyses the benefits of alternative control strategies in one of the Canary Islands (El Hierro island) in terms of reducing the need of load shedding activation. These control strategies are the variable speed wind turbines inertial contribution to frequency regulation and the use of Pelton turbines as synchronous condensers. Both strategies do not involve a significant loss in the efficiency or in the available wind energy. Additionally, the participation of variable speed pumps in the frequency regulation, control strategy recently adopted in El Hierro power system, has been included in the analysis. To achieve these objectives, a complete dynamic mathematical model of this power system has been delivered. Representative generation schedules that fulfil several real combinations of wind generation and load were generated and used to carry out the study. The results obtained show the effectiveness of the alternatives control strategies proposed. The amount of load to be shed is reduced or even avoided in many scenarios, but the three alternative control strategies present their own particularities.

ACS Style

José Ignacio Sarasúa; Guillermo Martínez-Lucas; Juan Ignacio Pérez-Díaz; Daniel Fernández-Muñoz. Alternative operating modes to reduce the load shedding in the power system of El Hierro Island. International Journal of Electrical Power & Energy Systems 2021, 128, 106755 .

AMA Style

José Ignacio Sarasúa, Guillermo Martínez-Lucas, Juan Ignacio Pérez-Díaz, Daniel Fernández-Muñoz. Alternative operating modes to reduce the load shedding in the power system of El Hierro Island. International Journal of Electrical Power & Energy Systems. 2021; 128 ():106755.

Chicago/Turabian Style

José Ignacio Sarasúa; Guillermo Martínez-Lucas; Juan Ignacio Pérez-Díaz; Daniel Fernández-Muñoz. 2021. "Alternative operating modes to reduce the load shedding in the power system of El Hierro Island." International Journal of Electrical Power & Energy Systems 128, no. : 106755.

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: 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: 28 May 2020 in Electronics
Reads 0
Downloads 0

With high levels of wind energy penetration, the frequency response of isolated power systems is more likely to be affected in the event of a sudden frequency disturbance or fluctuating wind conditions. In order to minimize excessive frequency deviations, several techniques and control strategies involving Variable Speed Wind Turbines (VSWTs) have been investigated in isolated power systems. In this paper, the main benefits and disadvantages of introducing VSWTs—both their inertial contribution and primary frequency regulation—in an exclusively renewable isolated power system have been analyzed. Special attention has been paid to the influence of the delays of control signals in the wind farm when VSWTs provide primary regulation as well as to the wind power reserve value which is needed. To achieve this objective, a methodology has been proposed and applied to a case study: El Hierro power system. A mathematical dynamic model of the isolated power system, including exclusively renewable technologies, has been described. Representative generation schedules and wind speed signals have been fixed according to the observed system. Finally, in order to obtain conclusions, realistic system events such as fluctuations in wind speed and the outage of the generation unit with the higher assigned power in the power system have been simulated.

ACS Style

Guillermo Martínez-Lucas; José Ignacio Sarasúa; Juan Ignacio Pérez-Díaz; Sergio Martínez; Danny Ochoa. Analysis of the Implementation of the Primary and/or Inertial Frequency Control in Variable Speed Wind Turbines in an Isolated Power System with High Renewable Penetration. Case Study: El Hierro Power System. Electronics 2020, 9, 901 .

AMA Style

Guillermo Martínez-Lucas, José Ignacio Sarasúa, Juan Ignacio Pérez-Díaz, Sergio Martínez, Danny Ochoa. Analysis of the Implementation of the Primary and/or Inertial Frequency Control in Variable Speed Wind Turbines in an Isolated Power System with High Renewable Penetration. Case Study: El Hierro Power System. Electronics. 2020; 9 (6):901.

Chicago/Turabian Style

Guillermo Martínez-Lucas; José Ignacio Sarasúa; Juan Ignacio Pérez-Díaz; Sergio Martínez; Danny Ochoa. 2020. "Analysis of the Implementation of the Primary and/or Inertial Frequency Control in Variable Speed Wind Turbines in an Isolated Power System with High Renewable Penetration. Case Study: El Hierro Power System." Electronics 9, no. 6: 901.

Journal article
Published: 17 June 2019 in International Journal of Electrical Power & Energy Systems
Reads 0
Downloads 0

El Hierro, island declared as a biosphere reserve by the UNESCO in 2000, aims to become self-sufficient in energy and 100% free of greenhouse gas emissions. This isolated power system consists of diesel units and a hybrid Wind- Pump Storage Hydropower Plant (W-PSHP), equipped with Variable Speed Wind Turbines (VSWTs), Pelton turbines and a pump station with both fixed- and variable-speed pumps. During last years the annual average renewable energy participation is increasing, especially due to the improvements in the frequency control strategies in PSHP including the operation in short circuit mode. This performance involves an important reduction of the system efficiency but allows PSHP to regulate frequency deviations when available wind power is higher than power demand and the Diesel units are disabled. In this paper different alternative frequency control schemes are proposed so that Pelton units support to the frequency control can be substituted, avoiding energy losses owing to short-circuit operation. This way renewable energy participation would be increased. The control schemes are developed using pumping station regulation capacity, the proper kinetic energy of the VSWTs rotors and a new Flywheel Energy Storage System connected to the grid by means of power electronics. Nine different control cases have been presented, including hydraulic short circuit operating mode. Different simulations have been carried out and they confirm that proposed control schemes fulfil the initial research objectives and enable to improve the global energy efficiency of the system.

ACS Style

José Ignacio Sarasúa; Guillermo Martínez-Lucas; Marcos Lafoz. Analysis of alternative frequency control schemes for increasing renewable energy penetration in El Hierro Island power system. International Journal of Electrical Power & Energy Systems 2019, 113, 807 -823.

AMA Style

José Ignacio Sarasúa, Guillermo Martínez-Lucas, Marcos Lafoz. Analysis of alternative frequency control schemes for increasing renewable energy penetration in El Hierro Island power system. International Journal of Electrical Power & Energy Systems. 2019; 113 ():807-823.

Chicago/Turabian Style

José Ignacio Sarasúa; Guillermo Martínez-Lucas; Marcos Lafoz. 2019. "Analysis of alternative frequency control schemes for increasing renewable energy penetration in El Hierro Island power system." International Journal of Electrical Power & Energy Systems 113, no. : 807-823.

Journal article
Published: 01 December 2018 in International Journal of Electrical Power & Energy Systems
Reads 0
Downloads 0

The wind energy penetration rate is being increased in majority of European countries. However, a high penetration rate could endanger the stability of power systems, particularly in small islands. Hydropower plays an important role in the regulation and control of isolated power systems with renewable sources, but it may not be able to maintain the frequency within grid requirements. This is the case of El Hierro power system (Canary archipelago), where a hybrid wind–pumped storage hydropower plant (PSHP) was committed to reduce the use of fossil fuels. Currently, frequency regulation is only provided by the PSHP and diesel generators. Therefore, it is proposed that variable-speed wind turbines (VSWTs) contribute to frequency regulation, thereby minimizing the need for fossil fuels. This study aims to conduct an analysis on the effect of the VSWT contribution to frequency regulation in the power system of El Hierro. It is based on classical control tools from a linearized mathematical model considering different VSWT regulation strategies. The eigenvalues, damping ratio, and participation factors of the state variables have been obtained. The more significant oscillation modes in the dynamic response of the system have been identified. According to this modal analysis, a methodology for the adjustment of the PSHP and VSWT controller gains is proposed. An improvement in the quality of frequency regulation while maintaining the El Hierro system frequency within grid requirements has been proved based on simulating different events related to wind speed or variations in the power demand, using a nonlinear model of the combined wind–hydro power plant.

ACS Style

Guillermo Martínez-Lucas; José Ignacio Sarasúa; José Ángel Sánchez-Fernández. Eigen analysis of wind–hydro joint frequency regulation in an isolated power system. International Journal of Electrical Power & Energy Systems 2018, 103, 511 -524.

AMA Style

Guillermo Martínez-Lucas, José Ignacio Sarasúa, José Ángel Sánchez-Fernández. Eigen analysis of wind–hydro joint frequency regulation in an isolated power system. International Journal of Electrical Power & Energy Systems. 2018; 103 ():511-524.

Chicago/Turabian Style

Guillermo Martínez-Lucas; José Ignacio Sarasúa; José Ángel Sánchez-Fernández. 2018. "Eigen analysis of wind–hydro joint frequency regulation in an isolated power system." International Journal of Electrical Power & Energy Systems 103, no. : 511-524.

Journal article
Published: 23 October 2018 in Energies
Reads 0
Downloads 0

Frequency control is one of the most critical tasks in isolated power systems, especially in high renewable penetration scenarios. This paper presents a new hydropower pumped-storage dual control strategy that combines variable-speed-driven pumps and fixed-speed-driven pumps. A possible case for implementation of such a control scheme is described based on El Hierro Island’s power system. This isolated power system consists of a hybrid wind pumped-storage hydropower plant and diesel generators. The pumped-storage power plant is divided into a hydropower plant equipped with four Pelton turbines and a pump station equipped with both fixed- and variable-speed pumps. According to the proposed control scheme, frequency regulation will be provided by a dual controller: a continuous controller for the variable-speed pumps and a discrete controller for the fixed-speed pumps. The Pelton units, which operate as synchronous condensers, also supply the power system inertia. Therefore, diesel units may be disconnected, decreasing generation costs and greenhouse gas emissions. Owing to the combination of both controllers and the inertia of the Pelton units, an acceptable frequency regulation can be achieved. This technique has been validated through computer simulations.

ACS Style

José Ignacio Sarasúa; Guillermo Martínez-Lucas; Carlos A. Platero; José Ángel Sánchez-Fernández. Dual Frequency Regulation in Pumping Mode in a Wind–Hydro Isolated System. Energies 2018, 11, 2865 .

AMA Style

José Ignacio Sarasúa, Guillermo Martínez-Lucas, Carlos A. Platero, José Ángel Sánchez-Fernández. Dual Frequency Regulation in Pumping Mode in a Wind–Hydro Isolated System. Energies. 2018; 11 (11):2865.

Chicago/Turabian Style

José Ignacio Sarasúa; Guillermo Martínez-Lucas; Carlos A. Platero; José Ángel Sánchez-Fernández. 2018. "Dual Frequency Regulation in Pumping Mode in a Wind–Hydro Isolated System." Energies 11, no. 11: 2865.

Journal article
Published: 16 October 2018 in Renewable Energy
Reads 0
Downloads 0

The upgrade of a pumped-storage power plant (PSPP) to allow variable speed operation offer several advantages in pumping and generating modes. However, in pumping mode at part load, both pressure and torque pulsations develop in the pump turbine runner. This paper evaluates the risk of fatigue damage in the penstock of a variable-speed PSPP due to the propagation of the pressure pulsations developing in the pump turbine runner at partial load in pumping mode. For that purpose, a simulation model of a variable-speed PSPP has been developed. The pressure and torque pulsations are generated each from a different set of sinusoidal functions calibrated from the results of a Computational Fluid Dynamic model, which was in turn validated from experimental data. A Monte Carlo simulation has been performed considering different temporal gaps between the sinusoidal functions reproducing the pressure pulsations in one and another pump turbine. The number of stress cycles that may cause fatigue damage in the penstock has been obtained from the results of the simulations and the fatigue curves defined in the Eurocode, and then transformed into the maximum number of hours per year the PSPP can operate at partial load in pumping mode to avoid fatigue damages.

ACS Style

Guillermo Martínez-Lucas; Juan I. Pérez-Díaz; Manuel Chazarra; José I. Sarasúa; Giovanna Cavazzini; Giorgio Pavesi; Guido Ardizzon. Risk of penstock fatigue in pumped-storage power plants operating with variable speed in pumping mode. Renewable Energy 2018, 133, 636 -646.

AMA Style

Guillermo Martínez-Lucas, Juan I. Pérez-Díaz, Manuel Chazarra, José I. Sarasúa, Giovanna Cavazzini, Giorgio Pavesi, Guido Ardizzon. Risk of penstock fatigue in pumped-storage power plants operating with variable speed in pumping mode. Renewable Energy. 2018; 133 ():636-646.

Chicago/Turabian Style

Guillermo Martínez-Lucas; Juan I. Pérez-Díaz; Manuel Chazarra; José I. Sarasúa; Giovanna Cavazzini; Giorgio Pavesi; Guido Ardizzon. 2018. "Risk of penstock fatigue in pumped-storage power plants operating with variable speed in pumping mode." Renewable Energy 133, no. : 636-646.

Journal article
Published: 19 January 2018 in Energies
Reads 0
Downloads 0

Currently, some small islands with high wind potential are trying to reduce the environmental and economic impact of fossil fuels by using renewable resources. Nevertheless, the characteristics of these renewable resources negatively affect the quality of the electrical energy, causing frequency disturbances, especially in isolated systems. In this study, the combined contribution to frequency regulation of variable speed wind turbines (VSWT) and a pump storage hydropower plant (PSHP) is analyzed. Different control strategies, using the kinetic energy stored in the VSWT, are studied: inertial, proportional, and their combination. In general, the gains of the VSWT controller for interconnected systems proposed in the literature are not adequate for isolated systems. Therefore, a methodology to adjust the controllers, based on exhaustive searches, is proposed for each of the control strategies. The control strategies and methodology have been applied to a hybrid wind–hydro power plant on El Hierro Island in the Canary archipelago. At present, in this isolated power system, frequency regulation is only provided by the PSHP and diesel generators. The improvements in the quality of frequency regulation, including the VSWT contribution, have been proven based on simulating different events related to wind speed, or variations in the power demand.

ACS Style

Guillermo Martínez-Lucas; José Ignacio Sarasúa; José Ángel Sánchez-Fernández. Frequency Regulation of a Hybrid Wind–Hydro Power Plant in an Isolated Power System. Energies 2018, 11, 239 .

AMA Style

Guillermo Martínez-Lucas, José Ignacio Sarasúa, José Ángel Sánchez-Fernández. Frequency Regulation of a Hybrid Wind–Hydro Power Plant in an Isolated Power System. Energies. 2018; 11 (1):239.

Chicago/Turabian Style

Guillermo Martínez-Lucas; José Ignacio Sarasúa; José Ángel Sánchez-Fernández. 2018. "Frequency Regulation of a Hybrid Wind–Hydro Power Plant in an Isolated Power System." Energies 11, no. 1: 239.

Conference paper
Published: 04 April 2017 in Journal of Physics: Conference Series
Reads 0
Downloads 0

This paper presents a dynamic simulation model of a laboratory-scale pumped-storage power plant (PSPP) operating in pumping mode with variable speed. The model considers the dynamic behavior of the conduits by means of an elastic water column approach, and synthetically generates both pressure and torque pulsations that reproduce the operation of the hydraulic machine in its instability region. The pressure and torque pulsations are generated each from a different set of sinusoidal functions. These functions were calibrated from the results of a CFD model, which was in turn validated from experimental data. Simulation model results match the numerical results of the CFD model with reasonable accuracy. The pump-turbine model (the functions used to generate pressure and torque pulsations inclusive) was up-scaled by hydraulic similarity according to the design parameters of a real PSPP and included in a dynamic simulation model of the said PSPP. Preliminary conclusions on the impact of unstable operation conditions on the penstock fatigue were obtained by means of a Monte Carlo simulation-based fatigue analysis.

ACS Style

G Martínez-Lucas; Juan Ignacio Pérez-Díaz; J I Sarasúa; G Cavazzini; Giorgio Pavesi; G Ardizzon. Simulation model of a variable-speed pumped-storage power plant in unstable operating conditions in pumping mode. Journal of Physics: Conference Series 2017, 813, 12028 .

AMA Style

G Martínez-Lucas, Juan Ignacio Pérez-Díaz, J I Sarasúa, G Cavazzini, Giorgio Pavesi, G Ardizzon. Simulation model of a variable-speed pumped-storage power plant in unstable operating conditions in pumping mode. Journal of Physics: Conference Series. 2017; 813 ():12028.

Chicago/Turabian Style

G Martínez-Lucas; Juan Ignacio Pérez-Díaz; J I Sarasúa; G Cavazzini; Giorgio Pavesi; G Ardizzon. 2017. "Simulation model of a variable-speed pumped-storage power plant in unstable operating conditions in pumping mode." Journal of Physics: Conference Series 813, no. : 12028.

Journal article
Published: 01 May 2016 in Renewable Energy
Reads 0
Downloads 0

Pumped storage hydro plants (PSHP) can provide adequate energy storage and frequency regulation capacities in isolated power systems having significant renewable energy resources. Due to its high wind and solar potential, several plans have been developed for La Palma Island in the Canary archipelago, aimed at increasing the penetration of these energy sources. In this paper, the performance of the frequency control of La Palma power system is assessed, when the demand is supplied by the available wind and solar generation with the support of a PSHP which has been predesigned for this purpose. The frequency regulation is provided exclusively by the PSHP. Due to topographic and environmental constraints, this plant has a long tail-race tunnel without a surge tank. In this configuration, the effects of pressure waves cannot be neglected and, therefore, usual recommendations for PID governor tuning provide poor performance. A PI governor tuning criterion is proposed for the hydro plant and compared with other criteria according to several performance indices. Several scenarios considering solar and wind energy penetration have been simulated to check the plant response using the proposed criterion. This tuning of the PI governor maintains La Palma system frequency within grid code requirements.

ACS Style

Guillermo Martínez-Lucas; José Ignacio Sarasúa; José Ángel Sánchez-Fernández; José Román Wilhelmi. Frequency control support of a wind-solar isolated system by a hydropower plant with long tail-race tunnel. Renewable Energy 2016, 90, 362 -376.

AMA Style

Guillermo Martínez-Lucas, José Ignacio Sarasúa, José Ángel Sánchez-Fernández, José Román Wilhelmi. Frequency control support of a wind-solar isolated system by a hydropower plant with long tail-race tunnel. Renewable Energy. 2016; 90 ():362-376.

Chicago/Turabian Style

Guillermo Martínez-Lucas; José Ignacio Sarasúa; José Ángel Sánchez-Fernández; José Román Wilhelmi. 2016. "Frequency control support of a wind-solar isolated system by a hydropower plant with long tail-race tunnel." Renewable Energy 90, no. : 362-376.

Journal article
Published: 01 November 2015 in Renewable Energy
Reads 0
Downloads 0

In this paper the power-frequency control of hydropower plants with long penstocks is addressed. In such configuration the effects of pressure waves cannot be neglected and therefore commonly used criteria for adjustment of PID governors would not be appropriate. A second-order Π model of the turbine-penstock based on a lumped parameter approach is considered. A correction factor is introduced in order to approximate the model frequency response to the continuous case in the frequency interval of interest. Using this model, several criteria are analysed for adjusting the PI governor of a hydropower plant operating in an isolated system. Practical criteria for adjusting the PI governor are given. The results are applied to a real case of a small island where the objective is to achieve a generation 100% renewable (wind and hydro). Frequency control is supposed to be provided exclusively by the hydropower plant. It is verified that the usual criterion for tuning the PI controller of isolated hydro plants gives poor results. However, with the new proposed adjustment, the time response is considerably improve

ACS Style

Guillermo Martínez De Lucas; José Ignacio Sarasúa; José Ángel Sánchez-Fernández; José Román Wilhelmi. Power-frequency control of hydropower plants with long penstocks in isolated systems with wind generation. Renewable Energy 2015, 83, 245 -255.

AMA Style

Guillermo Martínez De Lucas, José Ignacio Sarasúa, José Ángel Sánchez-Fernández, José Román Wilhelmi. Power-frequency control of hydropower plants with long penstocks in isolated systems with wind generation. Renewable Energy. 2015; 83 ():245-255.

Chicago/Turabian Style

Guillermo Martínez De Lucas; José Ignacio Sarasúa; José Ángel Sánchez-Fernández; José Román Wilhelmi. 2015. "Power-frequency control of hydropower plants with long penstocks in isolated systems with wind generation." Renewable Energy 83, no. : 245-255.

Conference paper
Published: 01 June 2015 in 2015 IEEE 15th International Conference on Environment and Electrical Engineering (EEEIC)
Reads 0
Downloads 0

In this paper, a hydroelectric power plant with long tail-race tunnel has been modelled for assessing its contribution to secondary regulation reserve. Cavitation problems, caused by the discharge conduit length, are expected downstream the turbine where low pressure appears during regulation manoeuvres. Therefore, governor's gains should be selected taking into account these phenomena. On the other hand, regulation services bidden by the plant operator should fulfil TSO (Transmission System Operator) quality requirements. A methodology for tuning governor PI gains is proposed and applied to a Hydro power plant in pre-design phase in northwest area of Spain. The PI gains adjustment proposed provides a proper plant response, according to some established indexes, while avoiding cavitation phenomena.

ACS Style

Guillermo Martínez-Lucas; José Ignacio Sarasúa; José Román Wilhelmi; Jose Angel Sanchez; Martinez-Lucas G.; Sarasua J.I.; Wilhelmi J.R.; Sanchez J.A.. Contribution to load-frequency regulation of a hydropower plant with long tail-race tunnel. 2015 IEEE 15th International Conference on Environment and Electrical Engineering (EEEIC) 2015, 1886 -1891.

AMA Style

Guillermo Martínez-Lucas, José Ignacio Sarasúa, José Román Wilhelmi, Jose Angel Sanchez, Martinez-Lucas G., Sarasua J.I., Wilhelmi J.R., Sanchez J.A.. Contribution to load-frequency regulation of a hydropower plant with long tail-race tunnel. 2015 IEEE 15th International Conference on Environment and Electrical Engineering (EEEIC). 2015; ():1886-1891.

Chicago/Turabian Style

Guillermo Martínez-Lucas; José Ignacio Sarasúa; José Román Wilhelmi; Jose Angel Sanchez; Martinez-Lucas G.; Sarasua J.I.; Wilhelmi J.R.; Sanchez J.A.. 2015. "Contribution to load-frequency regulation of a hydropower plant with long tail-race tunnel." 2015 IEEE 15th International Conference on Environment and Electrical Engineering (EEEIC) , no. : 1886-1891.

Research article
Published: 14 October 2014 in The Scientific World Journal
Reads 0
Downloads 0

Run-of-river hydropower plants usually lack significant storage capacity; therefore, the more adequate control strategy would consist of keeping a constant water level at the intake pond in order to harness the maximum amount of energy from the river flow or to reduce the surface flooded in the head pond. In this paper, a standard PI control system of a run-of-river diversion hydropower plant with surge tank and a spillway in the head pond that evacuates part of the river flow plant is studied. A stability analysis based on the Routh-Hurwitz criterion is carried out and a practical criterion for tuning the gains of the PI controller is proposed. Conclusions about the head pond and surge tank areas are drawn from the stability analysis. Finally, this criterion is applied to a real hydropower plant in design state; the importance of considering the spillway dimensions and turbine characteristic curves for adequate tuning of the controller gains is highlighted.

ACS Style

José Ignacio Sarasúa; Paz Elías; Guillermo Martínez-Lucas; Juan Ignacio Perez-Diaz; José Román Wilhelmi; José Angel Sánchez. Stability Analysis of a Run-of-River Diversion Hydropower Plant with Surge Tank and Spillway in the Head Pond. The Scientific World Journal 2014, 2014, 1 -13.

AMA Style

José Ignacio Sarasúa, Paz Elías, Guillermo Martínez-Lucas, Juan Ignacio Perez-Diaz, José Román Wilhelmi, José Angel Sánchez. Stability Analysis of a Run-of-River Diversion Hydropower Plant with Surge Tank and Spillway in the Head Pond. The Scientific World Journal. 2014; 2014 (5):1-13.

Chicago/Turabian Style

José Ignacio Sarasúa; Paz Elías; Guillermo Martínez-Lucas; Juan Ignacio Perez-Diaz; José Román Wilhelmi; José Angel Sánchez. 2014. "Stability Analysis of a Run-of-River Diversion Hydropower Plant with Surge Tank and Spillway in the Head Pond." The Scientific World Journal 2014, no. 5: 1-13.