Power decoupling capability with PR controller for Micro-Inverter applications

Rezaei, Mohammad Hossein; Akhbari, Mahdi

doi:10.1016/j.ijepes.2021.107607

Cited by 6 publications

(2 citation statements)

References 42 publications

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“…Grid-supporting inverters supply reactive power and varying active power at predefined droop setting [2]. Grid-feeding inverters maintain a constant current output and provide active power in phase with the grid because they focus on MPPT and zero reactive power [3,4]. Therefore, integrating PV, inverter and energy storage as an AC-PV module might help solve this energy problem.…”

Section: Introductionmentioning

confidence: 99%

Design and optimization of battery and thermal management system for AC photovoltaic energy module

Gullu,

Batarseh,

Alaql

2024

International Journal of Energy Studies

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The utilization of renewable energy sources has increased due to concerns about climate change. However, injecting the power from renewable energy sources into grid-tied systems is challenging. The techno-economic analysis a photovoltaic (PV) energy systems is investigated. As a result, this paper presents AC-PV module for Grid-Tied and Off-Grid Scenarios via optimization, modeling, and test results. Even though the output of a PV panel is DC voltage, a three-port inverter and a lithium-ion battery pack are integrated with the back of the PV panel. They are packaged as a PV system module that makes the module output have AC voltage. Therefore, an optimized AC-PV module can be a solution for residential and commercial use, which are grid-tied systems; it can be very efficient for those without access to electricity, which is an off-grid system. An integrated battery and thermal management strategy is crucial for this AC-PV module. In the article, the battery capacity optimization, the electrical and the thermal model of the battery pack, battery heat generation model are discussed by using stochastic analysis techniques; the battery test results are also obtained to identify the models’ parameters and a control algorithm is proposed to extract the battery information such as temperature, current, voltage, SoC and SoH of the battery pack.

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Section: Introductionmentioning

confidence: 99%

Design and optimization of battery and thermal management system for AC photovoltaic energy module

Gullu,

Batarseh,

Alaql

2024

International Journal of Energy Studies

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“…A highly effective linearization-based feedback control is implemented in [29] for smooth mode transfer of a hybrid microgrid from a grid connected to the island mode and vice versa. A PR controller's inherent active and reactive power decoupling capability was investigated in [30], and cross-coupling effects in the LCL filter section of a grid-connected inverter were studied. The results were verified by simulation results, showing that the proposed current controller could achieve a fast response that is subject to transients.…”

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confidence: 99%

Decoupler-Based Feedback Control Strategy for Interlinking Converter in a Hybrid Microgrid

Nair

Kanakasabapathy

2023

Designs

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In a hybrid microgrid with AC and DC subgrids, the interlinking converter (IC) is the key element connecting the two subgrids. The performance of the interlinking converter is adversely affected by the d- and q-axis impedance interaction between the inner control loops. This interaction is highly undesirable since it adversely affects both the dynamic and the steady-state performance of the IC. Based on this, a novel feedback-based decoupling strategy is developed to overcome the cross-coupling effect in the mathematical model of the interlinking converter. This is a novel concept since the feed-forward compensation techniques are utilized to address the cross-coupling effect in prior related works, which has an inherent disadvantage of additional disturbance due to the addition of the compensating terms. In this study, a complete decoupling of the d and q axes was achieved, and the first-order transfer functions were obtained for the control loops using systematic block-reduction algebra and direct synthesis approaches. With this model, computational complexities are reduced and the inner control loops are free from impedance interaction effects, thereby achieving enhanced transient stability. Perfect decoupling of the voltage vectors is achieved by the matrix diagonalization method. Furthermore, the novelty of the proposed control is that the decoupled model is integrated with a normalization-based coordinate control strategy for effective bidirectional power transfer via the interlinking converter. Additionally, the proposed controller’s validity was tested for its performance under different transients in the MATLAB Simulink platform. The simulation results validated the proposed control strategy by showing that a faster response is ensured. A high-quality reference signal is generated due to the effective decoupling achieved. This observation was also validated by comparing the T.H.D. levels of a decoupled model’s reference power signal to one without a decoupling strategy.

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