Two-Stage Converter Standalone PV-Battery System Based on VSG Control

Hasabelrasul, Hashim; Cai, Zeyu; Sun, Lei; Suo, Xuesong; Matraji, Imad

doi:10.1109/access.2022.3165664

Cited by 26 publications

(5 citation statements)

References 20 publications

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“…The control algorithm for the VSG comprises active-frequency control and reactive-voltage control [ 24 , 25 ], and it can be expressed as follows:

where P m and P e represent the mechanical and electromagnetic power of the VSG, respectively, while w and w ref denote the angular frequency of the VSG and the grid angular frequency, respectively. J and D represent the rotational inertia and damping coefficient of the VSG, respectively, and Q ref and Q o correspond to the reactive power reference and reactive power measured values, respectively.…”

Section: Fundamental Principles Of the Vsgmentioning

confidence: 99%

“…The control algorithm for the VSG comprises active-frequency control and reactivevoltage control [24,25], and it can be expressed as follows:…”

Section: Fundamental Principles Of the Vsgmentioning

confidence: 99%

“…The control block diagram of the VSG is derived from Equations ( 1), ( 3) and ( 4), as shown in Figure 2. From Figure 2, it can be observed that the active power-frequency equation generates the reference frequency and phase, while the reactive power-voltage The control algorithm for the VSG comprises active-frequency control and reactivevoltage control [24,25], and it can be expressed as follows:…”

Section: Fundamental Principles Of the Vsgmentioning

confidence: 99%

See 2 more Smart Citations

An Adaptive Virtual Impedance Method for Grid-Connected Current Quality Improvement of a Single-Phase Virtual Synchronous Generator under Distorted Grid Voltage

Zhong

Zhang

Zhu

et al. 2023

Sensors

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The proportion of distributed generation systems in power grids is increasing, leading to the gradual emergence of weak grid characteristics. Moreover, using voltage-sourced grid-connected inverters can enhance the stability of a weak grid. However, due to the presence of background harmonics in weak grids, the grid voltage can cause significant distortions in the grid-connected current, which adversely affects the quality of the grid-connected current. This paper begins by briefly introducing the principle of the virtual synchronous generator (VSG). Then, the output current of the voltage source inverter is analyzed to elucidate the mechanism of harmonic current generation. Considering the distortion in the grid-connected current of the voltage source grid-connected inverter caused by background harmonics in the grid voltage, a harmonic current suppression strategy based on an adaptive virtual harmonic resistor is proposed. The proposed strategy employs a signal separation module based on multiple second-order generalized integrators connected through a cross-feedback network. This module effectively separates the fundamental and harmonic currents from the grid-connected current, extracts the amplitudes of the fundamental and harmonic currents through coordinate transformation, and adaptively adjusts the virtual harmonic resistance magnitude through the negative feedback control of the harmonic content (the ratio of the harmonic current amplitude to the fundamental current amplitude). These measures are used to enhance the quality of the grid-connected current. Additionally, the stability of the system is analyzed using the root locus of the open-loop transfer function. Finally, the effectiveness of the proposed method is validated through a combination of MATLAB/Simulink simulations and experimental results.

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“…The control algorithm for the VSG comprises active-frequency control and reactive-voltage control [ 24 , 25 ], and it can be expressed as follows:

Section: Fundamental Principles Of the Vsgmentioning

confidence: 99%

“…The control algorithm for the VSG comprises active-frequency control and reactivevoltage control [24,25], and it can be expressed as follows:…”

Section: Fundamental Principles Of the Vsgmentioning

confidence: 99%

Section: Fundamental Principles Of the Vsgmentioning

confidence: 99%

See 1 more Smart Citation

An Adaptive Virtual Impedance Method for Grid-Connected Current Quality Improvement of a Single-Phase Virtual Synchronous Generator under Distorted Grid Voltage

Zhong

Zhang

Zhu

et al. 2023

Sensors

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show abstract

“…Thus, there are many types of virtual inertia control algorithms, depending on the control objectives. To control a PV system operating in stand-alone mode, a control strategy is introduced to match the PV output and the load, which can maintain the response of the PV system and prevent the output from collapsing [8,9]. The dynamic and static characteristics of synchronous generators are used in design the virtual inertia control for improving the power quality of grid-connected systems [10,11].…”

Section: Introductionmentioning

confidence: 99%

Performance enhancement of PV system using VSG with ANFIS controller

Osheba

Nazih

et al. 2023

Electr Eng

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With the enormous stress of energy lack and air pollution, renewable energy sources such as photovoltaic sources become an effective solution to solve these problems. The penetration of inertia-less photovoltaic sources into power system has adverse effects on the overall system inertia which threatens system stability. As a solution for this problem, virtual inertia technique can be used as a system controller in order to enhance the system performance and maintain its stability. In this paper, an adaptive virtual synchronous generator (VSG) controller based on the oscillation motion of the synchronous machine is introduced. Then, a proposed VSG with adaptive neuro-fuzzy inference system (ANFIS) is presented as an inverter controller. The system response is investigated and compared with other control methods under different operating scenarios. To verify the effectiveness of the proposed adaptive VSG, an experimental setup is presented with real-time implementation for the system using dSPACE DS1104 interfacing with MATLAB software, and the system response is investigated under different operating scenarios. Upon the presented results, there is an enhancement in the system response when the proposed adaptive VSG with ANFIS controller is used, and this emphasizes the superiority of using such controller in PV systems over other techniques.

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“…However, their installation costs are relatively high. In contrast, the standalone solar power system market has witnessed a significant growth in recent years [6,7]. Several factors can be attributed to this growth: Firstly, the efforts of governments across the globe to reduce carbon emissions and mitigate employed for the inverter to improve power harmonic content and reduce the size of the low-pass filter (LPF).…”

Section: Introductionmentioning

confidence: 99%

Novel Control Technology for Reducing Output Power Harmonics of Standalone Solar Power Generation Systems

Liu,

Lin,

Lin

et al. 2023

Processes

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This study presents a standalone solar power system that incorporates a photovoltaic (PV) module, a boost converter, an H-bridge inverter, a low-pass filter (LPF), and a microcontroller unit (MCU). A novel cake sweetness maximum power point tracking (CS MPPT) algorithm and adjustable frequency and duty cycle (AFDC) control strategy has been proposed and efficiently applied to the solar power system for optimizing the system efficiency and output power quality. The experimental results show that the proposed CS MPPT algorithm achieves an efficiency of 99% under both the uniform irradiance conditions (UIC) and partial shading conditions (PSC). Subsequently, the AFDC control strategy is applied to the H-bridge inverter which improves the output AC voltage and AC current and thereby improving the power quality. The system ensures a stable 110 Vrms/60 Hz AC output voltage with only 2% total voltage harmonic distortion of voltage (THDv), and produces a high-quality output voltage with reduced LPF volume and better economic benefits. The comparative analysis demonstrates that the characteristics and the performances of the CS MPPT algorithm in combination with the AFDC control strategy is better than the existing several maximum power point tracking (MPPT) techniques and inverter control strategies. The research output affirms the potential of the proposed solar power system to fulfill the actual daily needs of electricity by harnessing the maximum power from PV modules.

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Two-Stage Converter Standalone PV-Battery System Based on VSG Control

Cited by 26 publications

References 20 publications

An Adaptive Virtual Impedance Method for Grid-Connected Current Quality Improvement of a Single-Phase Virtual Synchronous Generator under Distorted Grid Voltage

An Adaptive Virtual Impedance Method for Grid-Connected Current Quality Improvement of a Single-Phase Virtual Synchronous Generator under Distorted Grid Voltage

Performance enhancement of PV system using VSG with ANFIS controller

Novel Control Technology for Reducing Output Power Harmonics of Standalone Solar Power Generation Systems

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