A Novel Unified Controller for Grid-Connected and Islanded Operation of PV-Fed Single-Stage Inverter

Moustafa, Mohamed M. Zakaria; Aboushal, M. A.; EL-Fouly, Tarek H. M.; Al‐Durra, Ahmed; Zeineldin, H. H.

doi:10.1109/tste.2021.3074248

Cited by 17 publications

(5 citation statements)

References 34 publications

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“…T n is also first chosen to be 0.2 times the time constant of the PI link, which means that: Accordingly, the root locus of the open-loop transfer function of the system is drawn, and the compensator parameters are adopted from the aforementioned design results. According to the open-loop transfer function of the system in (19), the root locus is shown in Fig. SA2 in Supplementary Material A.…”

Section: Cpc Parameter Selection and Performance In Frequency Domainmentioning

confidence: 99%

“…In this scheme, the frequency and phase are decoupled, and an additional virtual torque loop is generated. In [19], the grid-side inverter of a wind turbine is designed by referring to a virtual synchronization technique, and a high-pass filter based power system stabilizer (PSS) is used to suppress power oscillations. In [20], a design scheme used for a dual-mode inverter during islanded and grid-connected modes is proposed, and a second-order quasi-resonant link is applied to smooth the power fluctuations.…”

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confidence: 99%

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Power Synchronization Compensation Strategy Based on Second-order Compensation Links for Voltage-controlled Inverters in Microgrids

Dong,

Gong,

Bao

et al. 2023

Journal of Modern Power Systems and Clean Energy

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A second-order compensation link is adopted to control voltage-controlled inverters (VCIs) in microgrid systems to enhance the performance of the power synchronization process of the inverter. The second-order compensation link is classified as both a real pole compensator (RPC) and a complex pole compensator (CPC) according to the pole position. Given a model for the VCI power output, the design process for the second-order compensation link, which is equipped with an RPC and a CPC, is detailed. Moreover, the frequency-domain compensation effects of the RPC and CPC are analyzed using the root locus and Bode diagrams of the system before and after compensation. Finally, the compensation effects of the two types of second-order compensators are compared with the commonly used high-pass filter using MATLAB/Simulink, which verifies the RPC and CPC strategies. Simulation results show that the two types of compensators designed in this study can effectively increase the system cutting frequency and improve the phase margin in the frequency domain while accelerating the power synchronization process, simultaneously making it smoother and reducing overshoot in the time domain. The RPC has better gain robustness, whereas the CPC has better time constant robustness. By implementing an RPC or a CPC, the dynamic time of the power synchronization compensation strategy is reduced within 0.5 s, and the overshoot is reduced within 10% in the experiments with two inverters.

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Section: Cpc Parameter Selection and Performance In Frequency Domainmentioning

confidence: 99%

mentioning

confidence: 99%

Power Synchronization Compensation Strategy Based on Second-order Compensation Links for Voltage-controlled Inverters in Microgrids

Dong,

Gong,

Bao

et al. 2023

Journal of Modern Power Systems and Clean Energy

View full text Add to dashboard Cite

show abstract

“…However, the implementation of these approaches introduces challenges such as heightened intricacy, increased weight, elevated expenses, and diminished efficiency and lifespan. To mitigate expenses, reduce weight, and enhance both flexibility and efficacy, researchers have proposed transformerless topologies as an alternative solution [4], [5]. Therefore, transformerless inverters are considered suitable for a photovoltaic system.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, DC-DC converter is used in between the input DC side and the VSI to step-up the DC voltage as shown in Figure 1. However, this additional DC-DC converter makes the system bulky, more costly with low efficiency [5], [6]. In this paper, a new topology of VSI is designed for the solar PV system which has higher AC voltage than the input DC voltage.…”

Section: Introductionmentioning

confidence: 99%

Analysis, design, and control of standalone PV based boost DC-AC converter

Nayak,

Kumar,

Sahu

et al. 2024

IJAPE

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This paper presents a new control scheme for a boost DC–AC converter which is used for solar power applications. The proposed DC-AC converter configuration can produce an AC voltage level across the output or load side greater than input DC voltage based on the operating duty cycle. Generally, the conventional DC-AC converter or voltage source inverter (VSI) generates AC voltage which is less than input DC voltage. Maintaining a constant voltage across the load with improved dynamic performance is challenging for anyone for the solar photovoltaic (PV) system. A dual-loop sliding mode control is proposed for the boost VSI to address the above issues. The proposed controller has robust in nature against the wide fluctuation in the plant or load parameters. The design, analysis and control of the boost DC-AC converter are briefly discussed in this paper. This topology can be broadly used in solar powered uninterruptible power supply (UPS) where boosting operation is essential for low voltage solar PV system. This topology eliminates the DC boosting power processing stage which leads an improved efficiency of the overall system. The MATLAB/Simulink results are presented to highlight the above issues.

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“…Increasing technological advancements have made solar energy systems widely available for residential and industrial use with minimal maintenance costs.A standalone PV (photovoltaic) system, also known as an off-grid solar system, is a solar power system that operates independently from the electrical grid. It consists of solar panels, a charge controller, batteries for energy storage, and an inverter to convert DC (direct current) power from the panels into AC (alternating current) power for use in household appliances and devices [4,5].Analyzing a standalone PV system involves assessing several key aspects: 1.1. Solar Panels: The efficiency and capacity of the solar panels determine the amount of electricity generated.…”

Section: Introductionmentioning

confidence: 99%

MPPT for Microgrid Connected PV System using ANN, InCond and P&O Techniques

Singh¹,

Singh²,

Ansari³

2023

IJFMR

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The paper examines MPPT algorithms based on P&O, InCond, and ANN with a boost converter that supplies constant output to the load in a PV stand-alone system operating under varying irradiance conditions. To generate the duty cycle of a converter, the Perturb and Observe (P&O), Incremental Conductance (InCond), and Artificial Neural Network (ANN) algorithms are utilised. MATLAB and Simulink are used to conduct simulation research on the PV system. As the world approaches an alarming energy crisis, the demand for renewable energy sources increases daily. India is aiming to develop 20 GW of solar power by the year 2022. In a tropical nation like ours, solar energy is an essential source of energy. The principal issue with solar PV systems is their low efficiency and high initial investment. In this research paper, we discuss the various varieties of MPPT techniques in order to devise a method for obtaining the utmost possible output from a PV module and supplying it to the grid in order to increase the overall efficacy.

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A Novel Unified Controller for Grid-Connected and Islanded Operation of PV-Fed Single-Stage Inverter

Cited by 17 publications

References 34 publications

Power Synchronization Compensation Strategy Based on Second-order Compensation Links for Voltage-controlled Inverters in Microgrids

Power Synchronization Compensation Strategy Based on Second-order Compensation Links for Voltage-controlled Inverters in Microgrids

Analysis, design, and control of standalone PV based boost DC-AC converter

MPPT for Microgrid Connected PV System using ANN, InCond and P&O Techniques

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