Eight‐switch CHB‐based three‐level three‐phase shunt active power filter

Muneer, V; Bhattacharya, Avik

doi:10.1049/iet-pel.2020.0235

Cited by 9 publications

(2 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To solve the above problem, this section proposes an improved LADRC for the voltage outer loop of SAPF, which introduces a new error as the adjustment basis of the total disturbance. Its stability is proved by frequency domain analysis, and its tracking and anti-disturbance characteristics are analyzed (Muneer and Bhattacharya, 2020). Finally, the control performance of SAPF based on the improved LADRC control is simulated and verified by Matlab/Simulink digital simulation platform.…”

Section: Research On Improved Ladrc Of Sapfmentioning

confidence: 99%

Immunity of shunt active power filter based on improved LADRC

Yin

2023

Transactions of the Institute of Measurement and Control

View full text Add to dashboard Cite

To improve the dynamic response speed and performance of active power filter controller, and improve the robustness, tracking ability, and disturbance rejection ability of linear active disturbance rejection controller (ADRC), an improved linear ADRC (LADRC) is proposed. First, a new error adjustment total disturbance is introduced into the linear expansion state observer to adjust the total disturbance of the linear expansion state observer. Then, on the premise of system stability, the controller is applied to the voltage outer loop of shunt active power filter (SAPF), and the mathematical model of active power filter is deduced, and it is controlled according to the first-order linear active disturbance rejection controller. Finally, through frequency domain analysis, the stability, noise immunity, and tracking performance of the improved LADRC are analyzed. Using MATLAB and Simulink simulation platform, the current stability and tracking performance of SAPF under improved LADRC control are simulated and verified, and compared with traditional methods. The simulation results show that the waveform fluctuation of A-phase voltage on the grid side of this method is relatively smooth, and the voltage on the grid side is always kept at ±50 V; the voltage curve of SAPF DC side is kept between the actual set values, about 820 V; the waveform fluctuation of A-phase current on the load side is small, which is ±220 A; the harmonic distortion rate is 4%. It is verified that this method has good tracking effect and anti-interference characteristics, which is of great significance to improve the control performance of active power filter.

show abstract

Section: Research On Improved Ladrc Of Sapfmentioning

confidence: 99%

Immunity of shunt active power filter based on improved LADRC

Yin

2023

Transactions of the Institute of Measurement and Control

View full text Add to dashboard Cite

show abstract

“…[2], [3]. CHB multilevel converter is widely used in motor drive [4], new energy power generation [5], [6], active filter [7], flexible power transmission [8], static var compensator [9], power electronic transformer [10]- [13] and other fields.…”

Section: Introductionmentioning

confidence: 99%

The Generation Mechanism and Elimination Strategy of Narrow- and Error-Pulse for Cascaded H-Bridge NL-PWM Modulation

et al. 2021

IEEE Access

View full text Add to dashboard Cite

There is a wide application prospect of Nearest level pulse width modulation (NL-PWM) in cascaded H-bridge (CHB) converter, however, it will produce narrow-and error-pulse in the process of implementation, which has a negative impact on CHB efficiency, output voltage quality and safe operation of power devices. In this paper, the NL-PWM strategy is improved based on round function to solve the narrow pulse of traditional NL-PWM, and a step wave delay update strategy is proposed to solve the error-pulse of NL-PWM. This paper analyzes the basic principle of improved NL-PWM and its ability to avoid narrow pulse of power device, shows the harmonic characteristics of improved NL-PWM, analyzes the generation mechanism of error pulse, and calculates the error of output voltage caused by the proposed step wave delay update strategy. The correctness of theoretical analysis and the effectiveness of the proposed method are verified by simulation and experiment. The research shows that the improved NL-PWM can effectively prevent narrow pulse while maintaining good harmonic characteristics, and the proposed step wave delay update strategy can avoid error pulse and has little impact on the output of NL-PWM.

show abstract