Super-capacitor utilization for low-voltage ride through improvement of grid-tied wind turbines

Noureldeen, Omar; Youssef, Marwa M. M.

doi:10.1109/mepcon.2017.8301350

Cited by 7 publications

(3 citation statements)

References 14 publications

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“…Recovery from various symmetrical and asymmetrical faults with traditionally used DFIG control models may be insufficient. Various supercapacitor control models have been developed in DFIG for LVRT capability [23][24]. In this way, the adverse situations that may occur in grid-connected DFIGs can be eliminated.…”

Section: Introductionmentioning

confidence: 99%

Sliding Mode Control Based Supercapacitor Modeling for Dynamic Stability in DFIG Based Wind Turbines

Döşoğlu

Güvenç

Kaymaz

2022

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

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The supercapacitor is among the elements commonly used to store energy as an important component in sustainable energy systems. In doubly fed induction generators (DFIGs), the supercapacitor is used to compensate voltage dips and damping oscillations. In this study, a different supercapacitor model was developed for system stability in a DFIG-based wind turbine connected to an infinite bus. In the development of the mathematical supercapacitor model, the lookup table was realized with the voltage-capacity relationship and sliding mode control. DFIG modeling with/without the developed supercapacitor was performed for symmetrical and asymmetrical fault situations, and the findings were then compared and interpreted in detail. The simulation study analysis was conducted in a MATLAB/SIMULINK environment. The developed supercapacitor model yielded impressive results in symmetrical and asymmetrical faults.

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Section: Introductionmentioning

confidence: 99%

Sliding Mode Control Based Supercapacitor Modeling for Dynamic Stability in DFIG Based Wind Turbines

Döşoğlu

Güvenç

Kaymaz

2022

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

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“…At this time, we applied supercapacitors used in application fields, such as power quality improvement, high current, and high output, on the application field side where a high output must be supplied in a short time. Supercapacitors are more expensive than lead-acid or lithium batteries but have a high charge/discharge rate [18][19][20][21]. Hence, when installed instead of batteries generally used in configuring the power compensator, supercapacitors can obtain higher output and significantly shorten the charging time as storage devices.…”

Section: Introductionmentioning

confidence: 99%

Methods to Improve Dynamic System Response of Power Compensators Using Supercapacitors in Low-Voltage Ride-Through (LVRT) Conditions

Kim

Won

et al. 2022

Electronics

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In this paper, a power compensator using supercapacitors in parallel to protect grid-connected devices connected to the distributed power supply in the case of a low-voltage ride-through (LVRT) situation in designed, and a grid-connected device control method with improved responsiveness is proposed. In the LVRT situation, the distributed generation power may boost the DC_link voltage, increasing the risk of destroying grid-connected devices. To prevent this, the power compensator designed in this study absorbs active power in a fault situation and stores it in the supercapacitor to suppress the DC_link voltage rise and efficiently use the power. In addition, we propose methods to improve the response of the grid reactive power through the reactive power compensation of the power compensator in LVRT situation. To this end, the power angle (θPW) was extracted through the formula, and the reactive power command, to be compensated by the power compensator, and the reactive power command, compensated by the grid-connected devices, were calculated according to the active power value. In this way, the grid power controlled by the power compensation device and the grid-connected devices was controlled by the active/reactive power of the same power angle and analyzed mathematically. Active power control and static grid support were performed in the normal state where the reduction rate of the normal value of the grid voltage was around 10%. However, when the grid voltage dropped by 10% to 100%, the reactive power control was appropriately performed with dynamic grid support by increasing the voltage from 10% to 20% or more. We conducted a simulation of the new and renewable energy grid-connected devices using the OPAL-RT-based Hardware-in-the Loop Simulation (HILS) system to control the proposed active/reactive power.

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“…The EC was utilized as an energy storage system that discharges power during the lack of grid power and charges power during the excess of power. It has many merits, such as high current capability; the temperature range is wide, it has a long life, high efficiency, the voltage range is wide (Noureldeen and Youssef, 2017). It has been proposed with a STATCOM and additional real and reactive power support to improve the DFIG performance at low voltage events as mentioned in literature (Rahim and Nowicki, 2012).…”

Section: Introductionmentioning

confidence: 99%

An internal parallel capacitor control strategy for DC-link voltage stabilization of PMSG-based wind turbine under various fault conditions

et al. 2021

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In recent years, wind energy conversion systems (WECSs) have been growing rapidly. Due to various advantages, a permanent magnet synchronous generator (PMSG) is an appealing solution among different types of wind generators. As wind power penetration level in the grid increases, wind power impacts the grid and vice versa. The most essential concerns in the system are voltage sag and swell, and grid code compliance, particularly for low voltage ride-through (LVRT) and high voltage ride-through (HVRT) capability, is a pressing necessity. This paper presents a parallel capacitor (PC) control strategy to enhance the LVRT and HVRT capability of PMSG. Furthermore, this study presents a method for the sizing of a PC system for the reduction of the overvoltage of the DC-link during voltage sags and swell. Fast Fourier transform analysis is used to determine the total harmonic distortion (THD) for the injected current into the grid. The obtained results illustrate the effectiveness of the proposed system in keeping the DC-link voltage below the limit, power quality improvement, and increasing the LVRT and HVRT capability. Models of wind turbine, PMSG, and PC control system are built using MATLAB/SIMULINK software.

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Super-capacitor utilization for low-voltage ride through improvement of grid-tied wind turbines

Cited by 7 publications

References 14 publications

Sliding Mode Control Based Supercapacitor Modeling for Dynamic Stability in DFIG Based Wind Turbines

Sliding Mode Control Based Supercapacitor Modeling for Dynamic Stability in DFIG Based Wind Turbines

Methods to Improve Dynamic System Response of Power Compensators Using Supercapacitors in Low-Voltage Ride-Through (LVRT) Conditions

An internal parallel capacitor control strategy for DC-link voltage stabilization of PMSG-based wind turbine under various fault conditions

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