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

Gao, Ning; Lin, Xin; Wu, Weimin; Blaabjerg, Frede

doi:10.3390/en14051482

Cited by 11 publications

(4 citation statements)

References 24 publications

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“…Under ideal grid conditions, the control of the LCL-type PCS is relatively mature, and the output power quality can be significantly improved by adjusting the PI parameters (Gao et al, 2021) or improving the current controller (Errouissi and Al-Durra, 2018) by reasonable methods. However, in the actual operation, the microgrid often has non-ideal phenomena such as grid voltage unbalance and harmonic pollution.…”

Section: Introductionmentioning

confidence: 99%

Active disturbance rejection control of three-phase LCL power conversion system under non-ideal grid conditions

Wang

Yang

2023

Front. Energy Res.

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Under non-ideal grid operating conditions such as unbalanced grid voltage and harmonic grid that are commonly found in microgrid conditions, the negative sequence components of the microgrid voltage interfere with the active and reactive current controls in the power conversion system, leading to an increase in the harmonic content of the grid-side current and affecting the power quality of the microgrid system. To solve these problems, firstly, the mathematical model of the LCL-type power conversion system is analyzed, and a linear active disturbance rejection control based on model compensation is designed. Secondly, the influence of non-ideal power grid conditions on the control of the LCL-type power conversion system is analyzed, and the active disturbance rejection control strategy of the LCL-type power conversion system based on frequency-locked loops with harmonic cancellation modules (HCM-FLL) is proposed, which speeds up the system, improves the system’s robustness, and reduces the harmonic content of the network measurement current under the condition of power grid voltage unbalance and harmonic power grid. Finally, by using the verification of MATLAB/Simulink simulation, the current power quality obviously under the condition of voltage unbalance and harmonic power grid is evidently improved by the proposed control strategy. When compared to the traditional control methods, the control strategy proposed in this study features a simple control structure, making it easy to implement in engineering without requiring high controller performance or additional circuits. This reduces design costs and provides a wide range of controller parameters, ensuring strong anti-interference performance without the need for frequent controller parameter adjustments.

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Section: Introductionmentioning

confidence: 99%

Active disturbance rejection control of three-phase LCL power conversion system under non-ideal grid conditions

Wang

Yang

2023

Front. Energy Res.

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“…Summing up the literature review, it should be said that there are many studies on the use of BESSs to implement the peak shaving strategy. The vast majority of works devoted to peak shaving concern power compensation in the operating conditions of an autonomous energy storage device, operating to eliminate distribution network constraints [38] and temporary overloads of network elements [39]. The paper [40] presents the capacity market mechanisms operating in Germany that can use energy storage at the level of transmission and distribution networks.…”

Section: Introductionmentioning

confidence: 99%

Determination of the Electricity Storage Power and Capacity for Cooperation with the Microgrid Implementing the Peak Shaving Strategy in Selected Industrial Enterprises

et al. 2022

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The capacity limitations of distribution networks, the increasing demands for electricity installation in terms of electricity quality parameters, and the development of electromobility all increase the need to implement systems in order to stabilize and regulate loads for end users. Battery Energy Storage Systems (BESSs), that operate in internal microgrids of enterprises, allow smoothing of electrical power consumption profiles by actively reducing peak demand power. By using BESSs to implement a peak shaving strategy to reduce the peak power consumption of a company in an external network, energy efficiency can be improved by reducing contractual capacity. The aim of this study is to determine the conditions for the use of energy storage, in order to implement a peak shaving strategy for which the installation of the enterprise microgrid is economically efficient. The analysis of the operating conditions of the BESS should take into account the size of the energy storage, the characteristics of the demand profile for the demand systems, the charges related to electricity, and the costs of electricity storage. In the study, the size of the energy storage was related to the power and electrical capacity of the BESS that was used to implement the peak shaving strategy. The article presents the results of research on the method for determining an effective capacity and power of BESSs for enterprise microgrid systems. The technical and cost limitations of the actual microgrid system, which affected the decrease in economic efficiency of the peak shaving strategy in the company research, were taken into account. The simulations of the operation of the electricity storage system, based on real data of the demand of production companies, were based on the rules and market conditions in Poland.

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“…However, it causes a resonance hazard. One solution to this issue is applying the active damping method [16,23,33]. The literature [16] presents the combination of using a current controller based on PR units with phase compensation along with the inverter-side current feedback active damping to attenuate the LCL resonance peak.…”

Section: Introductionmentioning

confidence: 99%

Stability Analysis of Shunt Active Power Filter with Predictive Closed-Loop Control of Supply Current

Bielecka

Wojciechowski

2021

Energies

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This paper presents a shunt active power filter connected to the grid via an LCL coupling circuit with implemented closed-loop control. The proposed control system allows selective harmonic currents compensation up to the 50th harmonic with the utilization of a model-based predictive current controller. As the system is fully predictive, it provides high effectiveness of the harmonic reduction, which is proved by waveforms achieved in performed tests. On the other hand, the control system is prone to loss of stability. Therefore, the paper is focused on the stability analysis of the discussed control system with the additional outer control loop of the supply current with predictive control of this current. The conducted stability analysis encompasses the assessment of system stability as a function of the coupling circuit parameter identification accuracy, whose values are implemented in the current controller, as well as parameters such as the sampling frequency and proportional-integral (PI) controller coefficients. The obtained results show that the ranges of the LCL circuit parameter identification accuracy for which the system remains stable are relatively wide. However, the most effective compensation of the supply current distortion is achieved for the parameters identified correctly, and the greatest impact on the compensation quality has the value of L1 inductance.

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

Cited by 11 publications

References 24 publications

Active disturbance rejection control of three-phase LCL power conversion system under non-ideal grid conditions

Active disturbance rejection control of three-phase LCL power conversion system under non-ideal grid conditions

Determination of the Electricity Storage Power and Capacity for Cooperation with the Microgrid Implementing the Peak Shaving Strategy in Selected Industrial Enterprises

Stability Analysis of Shunt Active Power Filter with Predictive Closed-Loop Control of Supply Current

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