A methodology of LCL filter design for grid-tied power converters

Nardi, Cleidimar; Stein, Carlos M. O.; Carati, Emerson Giovani; Costa, Jean Patric da; Cardoso, Rafael

doi:10.1109/cobep.2015.7420101

Cited by 11 publications

(5 citation statements)

References 13 publications

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“…In order to select the filter parameters, grid current THDi minimization (less than 5%) as well as minimization of geometrical dimensions, power losses and costs were all taken into account. Literature analysis [18] and simulation study have shown that these criteria are best met by the filter according to Fig. 4c In addition, a thermal model of the converter was developed, in which a special thermal library of transistors was implemented, taking into account the characteristics of energy loss as a function of voltage and current.…”

Section: B Design Of Ac and DC Filtersmentioning

confidence: 99%

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International Journal of Electronics and Telecommunications

Grzejszczak

Barlik

Leszczyński

et al. 2019

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The paper presents a concept of a control system for a high-frequency three-phase PWM grid-tied converter (3x400 V / 50 Hz) that performs functions of a 10-kW DC power supply with voltage range of 600÷800 V and of a reactive power compensator. Simulation tests (in PLECS) allowed proper selection of semiconductor switches between fast IGBTs and silicon carbide MOSFETs. As the main criterion minimum amount of power losses in semiconductor devices was adopted. Switching frequency of at least 40 kHz was used with the aim of minimizing size of passive filters (chokes, capacitors) both on the AC side and on the DC side. Simulation results have been confirmed in experimental studies of the PWM converter, the power factor of which (inductive and capacitive) could be regulated in range from 0.7 to 1.0 with THDi of line currents below 5% and energy efficiency of approximately 98.5%. The control system was implemented in Texas Instruments TMS320F28377S microcontroller.

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Section: B Design Of Ac and DC Filtersmentioning

confidence: 99%

“…8. Switching energy vs drain current characteristic for LSIC1M0120E0080 MOSFET [18]. (redmeasured energy for Vdc = 600V)…”

Section: A Starting the System In Inverter Modementioning

confidence: 99%

International Journal of Electronics and Telecommunications

Grzejszczak

Barlik

Leszczyński

et al. 2019

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“…Many literatures presented different ideas that creating different optimization techniques to maintain the quality and stability of grids when using the VSG [11][12][13]. In addition, many literatures investigate modulation techniques such as SPWM and SVPWM to generate the PWM signals [14][15][16] in order to improve the frequency response due to synchronization process.…”

Section: Introductionmentioning

confidence: 99%

Improved Frequency Response of Parallel Virtual Synchronous Generators Using Grey Wolf Optimization

Al-Saadi,

Mahafzah,

Hatmi

2023

JESA

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This paper optimizes the frequency response of parallel operation of a grid connected Virtual Synchronous Generators (VSG) using a Gray-Wolf Optimization (GWO). The frequency response is achieved when the VSG is synchronized with the grid. The load demand is covered by using only VSGs (Eliminating the existence of conventional generators). The control scheme includes the active power loop aided with the proportional-integral-derivative (PID) controller with optimized parameters, proportional gain Kp, integral gain Ki, and the derivative gain kd. The PID controller gains are optimized using Grey Wolf Optimization. The control scheme resulted in increasing the stability of the power system. The simulation results show the effectiveness of using GWO to reduce the overshoot and steady state deviation of the frequency through the provided damping torque that enhances the VSG inertia. The overshot in the grid frequency due to synchronization is reduced from 8% to 0% with GWO. Therefore, the effect is a more stable system with less overshoot in the frequency (nearly zero). Moreover, the settling time of optimized response has no changed compared with the original frequency response. The system rated is supposed to be 4 kVA for better indication which simulated using MATLAB/Simulink.

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“…High power factor and low grid-connected current total harmonic distortion are common requirements for grid-connected inverters [1][2][3]. Pulse-width modulation (PWM) technology has a wide range of applications in the field of inverters, but a grid-connected inverter using PWM control technology will produce many switching frequency subharmonics, which seriously threaten the power quality and safe operation of the power grid [4][5][6]. In order to reduce the harmonic content of the grid-connected current, an appropriate grid-connected current filter must be adopted [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Improved PR Control Strategy for an LCL Three-Phase Grid-Connected Inverter Based on Active Damping

Zhang

Hao

et al. 2021

Applied Sciences

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Aiming at the problem of power coupling and complicated decoupling in the d-q coordinate system of a three-phase grid-connected inverter, a current closed-loop control strategy based on an improved QPIR (quasi-proportional integral resonant) controller in the α-β two-phase static coordinate system is proposed. Firstly, the mathematical model of an LCL three-phase grid-connected inverter is established, and its instantaneous power calculation equation is deduced. Secondly, the frequency method is applied to compare and analyze the proportional resonant, quasi-proportional resonant, and improved current controller, and the appropriate improved controller parameters are obtained according to the traditional proportional integral controller parameter design method and the weight coefficient. Finally, the improved controller is compared with the traditional controller in the simulation model of the LCL three-phase grid-connected inverter based on active damping. The results show that the proposed improved current control strategy has good dynamic response characteristics, can realize the non-static error control of grid-connected current, and realizes the decoupling control of active power and reactive power when the load jumps. At the same time, the results also prove the superiority of the proposed control strategy and verify its effectiveness.

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A methodology of LCL filter design for grid-tied power converters

Cited by 11 publications

References 13 publications

International Journal of Electronics and Telecommunications

International Journal of Electronics and Telecommunications

Improved Frequency Response of Parallel Virtual Synchronous Generators Using Grey Wolf Optimization

Improved PR Control Strategy for an LCL Three-Phase Grid-Connected Inverter Based on Active Damping

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