Power balancing in autonomous micro grid with variable speed pump

Mohanrajan, S R; Vijayakumari, A.; Kottayil, Sasi K.

doi:10.1109/icpcsi.2017.8392089

Cited by 2 publications

(2 citation statements)

References 8 publications

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“…Several approaches are reported in the specialized literature to keep hydropower plants operating at their nominal values. Some works consider the use of mechanical energy storage systems through flywheels [17], interconnected systems [18], storage of electrical energy [19] and use of MGs [20,21]. Other papers consider the use of asynchronous generators [22] and isolated micro-grids [23].…”

Section: State Of the Art Reviewmentioning

confidence: 99%

Improvements in Frequency Control of an AC Microgrid by Means of Micro-Hydropower Combined Flow-Reduced Dump Load Control Method

Pupo¹,

García²,

García-Vílchez³

et al. 2022

REPQJ

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Load Frequency Control (LFC) is an issue of top importance to ensure microgrids (MGs) safe and reliable operation in AC MGs. Primary frequency control of each energy source can be guaranteed in AC MGs in order to integrate other energy sources. This paper proposes a micro-hydro frequency control scheme, combining the control of a reduced dump load and the nozzle flow control of Pelton turbines operating in isolated from electricity grid. Some researchs have reported the integration of dump load and flow control methods, but they did not reduce the dump load value and adjust the nozzle flow linearly to the power value demanded by users, causing the inefficient use of water. Simulation results were obtained in Matlab®/Simulink® using models obtained from previous research and proven by means of experimental studies. The simulation of the proposed scheme shows that instantaneous frequency variation is about 2 % even for perturbations magnitude up to 12 %. The validation result shows a 60 % reduction in overshoot and settling time of frequency temporal behaviour operating the micro-hydro autonomously.

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Section: State Of the Art Reviewmentioning

confidence: 99%

Improvements in Frequency Control of an AC Microgrid by Means of Micro-Hydropower Combined Flow-Reduced Dump Load Control Method

Pupo¹,

García²,

García-Vílchez³

et al. 2022

REPQJ

View full text Add to dashboard Cite

show abstract

“…To keep hydropower plants operating at their nominal values, several approaches are reported in the specialized literature, some of which consider the use of mechanical energy storage systems through flywheels [28], interconnected systems [29], storage of electrical energy [30] and use of micro-grids [31,32]. Other methods consider the use of asynchronous generators [33] and isolated micro-grids [34].…”

Section: Review Of the State Of The Artmentioning

confidence: 99%

Combined Method of Flow-Reduced Dump Load for Frequency Control of an Autonomous Micro-Hydropower in AC Microgrids

et al. 2021

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Nowadays, microgrids (MGs) play a crucial role in modern power systems due to possibility of integrating renewable energies into grid-connected or islanded power systems. The Load Frequency Control (LFC) is an issue of paramount importance to ensure MGs reliable and safe operation. Specifically, in AC MGs, primary frequency control of each energy source can be guaranteed in order to integrate other energy sources. This paper proposes a micro-hydro frequency control scheme, combining the control of a reduced dump load and the nozzle flow control of Pelton turbines operating in autonomous regime. Some works have reported the integration of dump load and flow control methods, but they did not reduce the dump load value and adjust the nozzle flow linearly to the power value demanded by users, causing the inefficient use of water. Simulation results were obtained in Matlab®/Simulink® using models obtained from previous research and proven by means of experimental studies. The simulation of the proposed scheme shows that the frequency control in this plant is done in correspondence with the Cuban NC62-04 norm of power energy quality. In addition, it is possible to increase energy efficiency by reducing the value of the resistive dump load by up to 7.5% in a case study. The validation result shows a 60% reduction of overshoot and settling time of frequency temporal behavior of the autonomous micro-hydro.

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Power balancing in autonomous micro grid with variable speed pump

Cited by 2 publications

References 8 publications

Improvements in Frequency Control of an AC Microgrid by Means of Micro-Hydropower Combined Flow-Reduced Dump Load Control Method

Improvements in Frequency Control of an AC Microgrid by Means of Micro-Hydropower Combined Flow-Reduced Dump Load Control Method

Combined Method of Flow-Reduced Dump Load for Frequency Control of an Autonomous Micro-Hydropower in AC Microgrids

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