Grid Current Feedback Active Damping Control Based on Disturbance Observer for Battery Energy Storage Power Conversion System with LCL Filter

Ning Gao, Xin Lin, Weimin Wu and Frede Blaabjerg
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Ning Gao: Department of Electrical Engineering, Shanghai Maritime University, Shanghai 201306, China
Xin Lin: Department of Electrical Engineering, Shanghai Maritime University, Shanghai 201306, China
Weimin Wu: Department of Electrical Engineering, Shanghai Maritime University, Shanghai 201306, China
Frede Blaabjerg: Department of Energy Technology, Aalborg University, DK-9220 Aalborg, Denmark

Energies, 2021, vol. 14, issue 5, 1-16

Abstract: Adopting the battery energy storage system is an effective way to compensate the continuously growing fluctuating power generated by renewable sources. The power conversion system is considered as one of the core equipment used for interfacing battery packs to the grid in a battery energy storage system. This paper aims to apply an improved active damping control to a grid-tied power conversion system with LCL filter to attenuate its inherent resonance characteristics. The anti-interference ability is enhanced by estimating the second-order derivation of grid-injected current based on a modified disturbance observer. Meanwhile, the negative effects of parameter mismatch are equivalent to unmeasurable disturbances, which are possible to be compensated by subtracting the estimated values from the modulated voltage references. Moreover, the design method and robustness issue of the disturbance observer are discussed in detail. The presented control algorithm is implemented based on Simulink and dSpace. Detailed simulation results are provided, which can verify the feasibility and correctness of control strategy. Furthermore, an experimental prototype rated at 2.3 kW/110 V is constructed. The experimental results confirm that the presented control method is effective to be applied in the power conversion system (PCS).

Keywords: battery energy storage system; power conversion system; LCL filter; active damping; disturbance observer (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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