Direct power control modeling with optimized LCL filter for grid integrated renewables

This work proposes a multi-objective optimized design for an LCL filter taking into account discrete components. Volume and power losses are objective functions, while harmonic attenuation, total inductance, and control capability are handled as constraints. For power loss calculation, the currents at fundamental and switching frequency in the LCL filter are calculated. Here, currents at switching frequency are calculated using corresponding simplified transfer functions. On the other hand, decision variables (inductances, capacitance, and damping resistance) are taken from a database of commercial components (discrete decision variables), getting a filter whose final performance results directly from the design process. Under this scenario, the optimization problem is solved using the Non-Dominated Sorting Genetic Algorithm II. The methodology provides a Pareto Front of solutions with both objective functions. Every solution (filter design) has specific commercial components, and designer can select the one, which better fits with his requirements. As example, an LCL filter for a 1 kVA three-phase inverter is designed, where two of the resulting filters are simulated together with the inverter, using PSIM software, in order to evaluate their performance.

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“…According to References 16 and 17, calculation of components magnitude in the modulated signal (u S ) can be done as shown in Equation (12).…”

Section: Decomposition Of U Smentioning

confidence: 99%

A multi‐objective optimized design of LCL filters for grid‐connected voltage source inverters considering discrete components

Hernández

Mina

Calleja

et al. 2021

Int Trans Electr Energ Syst

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“…1,2 Nowadays, the renewable energy sources (RES) are more and more integrated to the utility generation systems with the aim to produce green energy. [2][3][4] Hence, power systems will have massive grid-tied renewables and clean sources integrated as distributed generations (DGs). These generations normally use voltage source inverters (VSIs) permitting the control of the generated power.…”

Section: Introductionmentioning

confidence: 99%

“…This phenomenon causes serious environmental problems . Nowadays, the renewable energy sources (RES) are more and more integrated to the utility generation systems with the aim to produce green energy . Hence, power systems will have massive grid‐tied renewables and clean sources integrated as distributed generations (DGs).…”

Section: Introductionmentioning

confidence: 99%

Adaptive direct power control based on ANN-GWO for grid interactive renewable energy systems with an improved synchronization technique

Djema

Boudour

Agbossou

et al. 2018

Int Trans Electr Energ Syst

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Summary This paper investigates the improvement of synchronization technique for single‐phase inverter. Specifically, the paper proposes a modified structure of second‐order generalized integrator with frequency‐locked loop (SOGI‐FLL) with FLL gain normalization. The proposed structure enhances the frequency detection, which makes it a powerful technique under distorted grid voltage. The validation of the proposed synchronization method includes simulations and experimental tests using Xilinx field programmable gate array (FPGA) as the target device. Moreover, time domain simulations using the direct power control (DPC) with the proposed structure are performed. The decoupled active and reactive powers are controlled using the artificial neural networks (ANNs) trained by the mean of a metaheuristic algorithm. In this paper, the grey wolf optimizer (GWO) is proposed to train the multilayer perceptron (MLP). The proposed approach shows better generation of synchronization signals and smooth power quality, making it suitable for grid‐tied and microgrids (MGs) power systems control.

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“…2 (a) and (b) show the equivalent circuit of a GCC with L and LCL filters, respectively. If the LCL filter is used instead of a series inductor, the virtual flux estimation should be modified, as explained in the following [23], [24]. In this topology, the capacitor VF, λcap, is expressed as:…”

mentioning

confidence: 99%

Resiliency Enhancement and Power Quality Optimization of Converter-Based Renewable Energy Microgrids

Eslahi

Vaez‐Zadeh

Rodríguez

2023

IEEE Trans. Power Electron.

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The converter-based renewable energy microgrids are becoming indispensable parts of power grids. Nevertheless, the increasing risks by different causes deteriorate the resiliency of their grid integration. In this paper, a sensorless combined control method for the grid-connected converters is proposed to enhance the resiliency in different aspects and against multiple risks . Power quality improvement is also considered in the proposed method, along with enhancing resiliency. A single control system is proposed to deal with unbalanced grid conditions, severe load changes, and short circuit faults. The control system has a low dependency on the system parameters. Also, a new reference calculation is proposed to improve the system performance under balanced and unbalanced conditions. It provides stable operation under normal and abnormal conditions such as unbalanced voltages, voltage sag, faults, etc. The operation under the proposed control system is compared with the one under a conventional control system to confirm its performance superiority through simulation and experimental results.

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Direct power control modeling with optimized LCL filter for grid integrated renewables

Cited by 10 publications

References 10 publications

A multi‐objective optimized design of LCL filters for grid‐connected voltage source inverters considering discrete components

A multi‐objective optimized design of LCL filters for grid‐connected voltage source inverters considering discrete components

Adaptive direct power control based on ANN-GWO for grid interactive renewable energy systems with an improved synchronization technique

Resiliency Enhancement and Power Quality Optimization of Converter-Based Renewable Energy Microgrids

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