Increasing wind power penetration in autonomous power systems through no-flow operation of Pelton turbines

Platero, Carlos A.; Nicolet, Christophe; Sánchez, Javier Solana; Kawkabani, B.

doi:10.1016/j.renene.2014.01.045

Cited by 36 publications

(38 citation statements)

References 22 publications

(20 reference statements)

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“…The proposed PI adjustment criteria are tested in a real system implemented in a small island where the generation is provided by a wind farm and a hydropower plant [3,27]; the frequency is supposed to be controlled only by the hydropower plant.…”

Section: Introductionmentioning

confidence: 99%

Power-frequency control of hydropower plants with long penstocks in isolated systems with wind generation

et al. 2015

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a b s t r a c tIn 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 P 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 improved.

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Section: Introductionmentioning

confidence: 99%

Power-frequency control of hydropower plants with long penstocks in isolated systems with wind generation

et al. 2015

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“…Therefore, there are two different problems in this strategy. The first one is increasing or decreasing, in a fast way, the non-wind generated power in cases of wind generation decreasing below the load [22,23]. The second is increasing or decreasing, also in a fast way, the pumping power demanded [24].…”

Section: Non-restricted Windmentioning

confidence: 99%

Evaluation of the Operating Efficiency of a Hybrid Wind–Hydro Powerplant

et al. 2020

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This paper analyzes the operating efficiency of a hybrid wind–hydro power plant located in El Hierro Island. This plant combines a wind farm (11.48 MW) and a pumped storage power plant (11.32 MW). It was built with the aim of supplying the island demand from renewable energy instead of using existing diesel units. The paper discusses several operational strategies and proposes an efficiency metric. Using 10 min data, the operation of this power plant has been simulated. From these simulations (more than 50,000 for a year), the operating efficiency and the percentage of demand covered from renewable energy is obtained. The difference between the worst and the best strategy is a twofold increase in efficiency. Moreover, the results of the simulations are compared with the system operational history since June 2015 (when the wind–hydro power plant started operation) until 2018. These comparisons show a reasonable agreement between simulations and operational history.

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“…Data from the W-PSHP in Gorona del Viento used in the model have been obtained from [58,67,68]. They are summarized in Table 3.…”

Section: Case Study: El Hierro Power Systemmentioning

confidence: 99%

Frequency Regulation of a Hybrid Wind–Hydro Power Plant in an Isolated Power System

2018

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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.

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Increasing wind power penetration in autonomous power systems through no-flow operation of Pelton turbines

Cited by 36 publications

References 22 publications

Power-frequency control of hydropower plants with long penstocks in isolated systems with wind generation

Power-frequency control of hydropower plants with long penstocks in isolated systems with wind generation

Evaluation of the Operating Efficiency of a Hybrid Wind–Hydro Powerplant

Frequency Regulation of a Hybrid Wind–Hydro Power Plant in an Isolated Power System

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