A hybrid energy storage strategy based on multivariable fuzzy coordinated control of photovoltaic grid‐connected power fluctuations

Xu, Dehong; Cen, Honglei

doi:10.1049/rpg2.12152

Cited by 8 publications

(3 citation statements)

References 27 publications

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“…(Tricarico et al, 2020) made improvements on the microgrid topology. In (Xu and Cen, 2021), a coordinated control strategy was used to suppress the power fluctuations of grid-connected PV power generation systems. Due to the interaction between the inverter and grid impedance, will cause a decrease in system stability.…”

Section: Introductionmentioning

confidence: 99%

An Improved Dual-Loop Feedforward Control Method for the Enhancing Stability of Grid-Connected PV and Energy Storage System Under Weak Grids

Liu²,

Wang³

et al. 2022

Front. Energy Res.

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Although the stability of the grid-connected photovoltaics (PV) and energy storage systems under weak grids has been widely researched, the classical improvement methods focus more on suppressing the harmonics introduced by the phase-locked loop (PLL). Furthermore, the current distortion caused by the DC voltage loop is difficult to be eliminated. In this study, based on the hybrid energy storage system of battery-supercapacitor, a dual-loop compensation method is proposed. First, the small-signal model and output impedance matrix are built in d-q axis. Second, for different disturbance loops, a DC voltage loop disturbance compensation method based on power feedforward is proposed to suppress the harmonics caused by the DC voltage controller (DVC). In addition, a voltage feedforward PLL disturbance compensation method is proposed, which can reduce the PLL perturbations and revise the output impedance to improve system stability. Finally, the output impedance frequency characteristic analysis and the hardware-in-the-loop (HIL) simulation results show that the proposed control method can effectively improve the stability of the system under weak grids.

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Section: Introductionmentioning

confidence: 99%

An Improved Dual-Loop Feedforward Control Method for the Enhancing Stability of Grid-Connected PV and Energy Storage System Under Weak Grids

Liu²,

Wang³

et al. 2022

Front. Energy Res.

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“…Ref. [30][31][32][33][34][35] utilise the fuzzy logic algorithm for units' power allocation. In Ref.…”

Section: Introductionmentioning

confidence: 99%

“…In Ref. [33], the power dispatch is done in such a way the units' SOC is converged. In other words, this method regulates the SOC of the battery by the HPDU and vice versa.…”

Section: Introductionmentioning

confidence: 99%

A novel output power determination and power distribution of hybrid energy storage system for wind turbine power smoothing

Eydi

Alishahi

Zarif

2022

IET Electric Power Appl

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This paper deals with the power smoothing of the wind power plants connected to a microgrid using a hybrid energy storage system (HESS). In a HESS, the power should be distributed between the battery and capacitor such that the capacitor supplies the peaks of power and its high‐frequency fluctuations, and the battery compensates for the rest. Besides, due to the relatively low lifetime of the batteries compared to the capacitors, it is preferred to transfer power fluctuations to the capacitor as much as possible. In this paper, methods for calculating the output, battery, and capacitor powers are presented. The output power is determined based on the grid restrictions and the battery SOC. The battery and capacitor powers are decided via an adaptive low‐pass filter. The cut‐off frequency of the low‐pass filter is specified by a fuzzy controller such that not only the power spikes and high‐frequency fluctuations are transferred to the capacitor but also the battery SOC variations are reduced. The simulation results show that for the presented wind speed profile, the output power determination reduces 13.7% of the HESS exchanged energy compared to the ramp limiting method. Besides, the proposed power distribution method reduces 92.6% of the unbeneficial charges and discharges of HESS and 8% of the battery exchanged energy compared to the condition that the constant cut‐off frequency filter is utilised. The experimental results confirm the effectiveness of the proposed output power determination and HESS power distribution methods. Analysing the methods’ cost proves that although the utilisation of the capacitor bank increases the system initial investment cost, it will return after a while relying on the units’ capacity, power fluctuations, control method etc.

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Remaining Useful Life Prediction of Super-Capacitors in Electric Vehicles Using Neural Networks

Gillani,

Shahid,

Gulzar

et al. 2024

Arab J Sci Eng

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A hybrid energy storage strategy based on multivariable fuzzy coordinated control of photovoltaic grid‐connected power fluctuations

Cited by 8 publications

References 27 publications

An Improved Dual-Loop Feedforward Control Method for the Enhancing Stability of Grid-Connected PV and Energy Storage System Under Weak Grids

An Improved Dual-Loop Feedforward Control Method for the Enhancing Stability of Grid-Connected PV and Energy Storage System Under Weak Grids

A novel output power determination and power distribution of hybrid energy storage system for wind turbine power smoothing

Remaining Useful Life Prediction of Super-Capacitors in Electric Vehicles Using Neural Networks

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