Modeling and Parameter Design of Voltage-Controlled Inverters Based on Discrete Control

Dong, Ningbo; Li, Wuhua; Han, Junyu; Zhao, Rongxiang

doi:10.3390/en11082154

Cited by 7 publications

(3 citation statements)

References 16 publications

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“…The known system inherent damping features [26,[47][48][49][50]] are another study path in LCL filters, in addition to the active damping. Furthermore, according to the findings in [51,52], it is learned that irrespective of the damping technique used (passive, active, or damping less), the resonant frequency of the LCL filters should be chosen less than the Nyquist frequency, that is, half the system sampling frequency.…”

Section: Introductionmentioning

confidence: 99%

Magnetic integrated LLCL filter with resonant frequency above Nyquist frequency

Al-Barashi

Liu

et al. 2022

IET Power Electronics

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This paper presents a design technique of magnetic integrated LLCL filters for grid-tied inverters. With the proposed design technique, the LLCL filter's resonant frequency can be higher than the Nyquist frequency. Furthermore, the proposed concept was only reported for the LCL filter in the previous research works. In addition, the modulation process will produce dominant switching harmonics for unipolar PWM H-bridge inverters at the double switching frequency. Thus, putting the resonant frequency beyond the Nyquist frequency will increase the stability zone. The proposed design methods maximize the filter inductors' utilization and resist the grid impedance variations under weak grid conditions, depending on the improved stability zone. Comparative simulation and HIL experimental results are presented to confirm the effectiveness of the proposed magnetic integrated LLCL filter design. The HIL experimental results and the simulation results agree well with each other.

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Section: Introductionmentioning

confidence: 99%

Magnetic integrated LLCL filter with resonant frequency above Nyquist frequency

Al-Barashi

Liu

et al. 2022

IET Power Electronics

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“…The parameter variations of passive components could seriously impact the filtering efficiency of the fully integrated T-LCL filter. Like other trapped filters [24,27,29,32,[51][52][53][54][55][56][57], parameter changes may cause weakening filtering efficiency due to shifting the resonant frequencies or even issues with stability. This issue has been reported in the literature.…”

Section: Simulation Resultsmentioning

confidence: 99%

Enhancing power quality of high‐speed railway traction converters by fully integrated T‐LCL filter

Al-Barashi

Meng

Liu

et al. 2022

IET Power Electronics

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Modulating the traction converters produces current harmonics at the switching frequencies and their multiples. These harmonics should be minimized to meet the network specifications. The LC‐trapped filters, tuned to these frequencies, can easily meet this requirement, but the existing applicable trap filters have not been studied with the traditional traction system topologies. Thus, this paper presents a trapped LCL filter with an LC resonator on the converter side, called a fully integrated T‐LCL filter, for the traction power supply system. The model and analysis reported in this research demonstrate that the presented filter has several advantages, which can be summarized by: reducing the size by winding many coils through magnetic integration, attenuating the switching frequency and its multiple harmonics that reduce the current total harmonic distortion, assuring durability against the filter parameters differences, and preserving system stability under transient conditions. The proposed filter can become a promising trap filter based on these advantages. Simulation models of an ac/dc single‐phase traction rectifier with the proposed filter were created and tested in MATLAB/Simulink, verifying its superiority. Finally, the filter is validated by performing hardware‐in‐the‐loop experiments.

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“…The control system design is out of the purpose of the paper. As detailed in literature, the current and voltage control loop can be modelled, considering the system of equation of the LCL filter [44][45][46]. Thus, control parameters can be defined according to the system eigen values and desired control performance [44,47].…”

Section: Converter Control Loopsmentioning

confidence: 99%

Development of a Multiphysics Real-Time Simulator for Model-Based Design of a DC Shipboard Microgrid

et al. 2020

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Recent and strict regulations in the maritime sector regarding exhaust gas emissions has led to an evolution of shipboard systems with a progressive increase of complexity, from the early utilization of electric propulsion to the realization of an integrated shipboard power system organized as a microgrid. Therefore, novel approaches, such as the model-based design, start to be experimented by industries to obtain multiphysics models able to study the impact of different designing solutions. In this context, this paper illustrates in detail the development of a multiphysics simulation framework, able to mimic the behaviour of a DC electric ship equipped with electric propulsion, rotating generators and battery energy storage systems. The simulation platform has been realized within the retrofitting project of a Ro-Ro Pax vessel, to size components and to validate control strategies before the system commissioning. It has been implemented on the Opal-RT simulator, as the core component of the future research infrastructure of the University of Genoa, which will include power converters, storage systems, and a ship bridge simulator. The proposed model includes the propulsion plant, characterized by propellers and ship dynamics, and the entire shipboard power system. Each component has been detailed together with its own regulators, such as the automatic voltage regulator of synchronous generators, the torque control of permanent magnet synchronous motors and the current control loop of power converters. The paper illustrates also details concerning the practical deployment of the proposed models within the real-time simulator, in order to share the computational effort among the available processor cores.

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Modeling and Parameter Design of Voltage-Controlled Inverters Based on Discrete Control

Cited by 7 publications

References 16 publications

Magnetic integrated LLCL filter with resonant frequency above Nyquist frequency

Magnetic integrated LLCL filter with resonant frequency above Nyquist frequency

Enhancing power quality of high‐speed railway traction converters by fully integrated T‐LCL filter

Development of a Multiphysics Real-Time Simulator for Model-Based Design of a DC Shipboard Microgrid

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