scholarly journals Control Method of Four Wire Active Power Filter Based on Three-Phase Neutral Point Clamped T-Type Converter

Energies ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 8427
Author(s):  
Dawid Buła ◽  
Grzegorz Jarek ◽  
Jarosław Michalak ◽  
Marcin Zygmanowski
Keyword(s):  
Power Flow ◽  
Reactive Power ◽  
Control Method ◽  
Active Power Filter ◽  
Active Power ◽  
Neutral Point ◽  
Laboratory System ◽  
Power Filter ◽  
Input Filter ◽  
Three Phase

An active power filter based on a three-level neutral point clamped T-type converter with LCL input filter is presented in the paper. The main goal of the paper is the analysis of a control system that ensures independent control of a current in each phase. The presented control method of the filter allows reactive power compensation and/or a higher harmonics reduction to be achieved in each phase independently, with the possibility of control tan (φ) coefficient. This allows the power flow between the phases to be minimalized and reduces the RMS values of filter currents without the need to balance grid currents. The analysis presents the possibility of an operation in different modes, which was verified by experimental results. The results have been obtained in a 20 ARMS laboratory system described in the paper. The results reveal relatively low power losses, which are a feature of the selected three-level T-type topology. Additionally, that topology, when compared to a two-level one, ensures the reduction in current ripples with the same parameters of passive components.

scholarly journals Improving Power Quality by a Four-Wire Shunt Active Power Filter: A Case Study

Energies ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1951
Author(s):  
Mihaela Popescu ◽  
Alexandru Bitoleanu ◽  
Mihaita Linca ◽  
Constantin Vlad Suru
Keyword(s):  
Power Quality ◽  
Quality Indicators ◽  
Reactive Power ◽  
Control Method ◽  
Active Power Filter ◽  
Active Power ◽  
Current Control ◽  
Shunt Active Power Filter ◽  
Power Filter ◽  
Unbalanced Load

This paper presents the use of a three-phase four-wire shunt active power filter to improve the power quality in the Department of Industrial Electronics of a large enterprise from Romania. The specificity is given by the predominant existence of single-phase consumers (such as personal computers, printers, lighting and AC equipment). In order to identify the power quality indicators and ways to improve them, an A-class analyzer was used to record the electrical quantities and energy parameters in the point of common coupling (PCC) with the nonlinear loads for 27 h. The analysis shows that, in order to improve the power quality in PCC, three goals must be achieved: the compensation of the distortion power, the compensation of the reactive power and the compensation of the load unbalance. By using the conceived three-leg shunt active power filter, controlled through the indirect current control method in an original variant, the power quality at the supply side is very much improved. In the proposed control algorithm, the prescribed active current is obtained as a sum of the loss current provided by the DC voltage and the equivalent active current of the unbalanced load. The performance associated with each objective of the compensation is presented and analyzed. The results show that all the power quality indicators meet the specific standards and regulations and prove the validity of the proposed solution.

The Simulation Research of Harmonic and Reactive Current Detection

2013 ◽  
Vol 373-375 ◽  
pp. 992-995
Author(s):  
Jun Li Wan ◽  
Wen Jie Chen
Keyword(s):  
Real Time ◽  
Reactive Power ◽  
Active Power Filter ◽  
Active Power ◽  
Harmonic Detection ◽  
Power Theory ◽  
Instantaneous Reactive Power Theory ◽  
Power Filter ◽  
Three Phase ◽  
Reactive Current

This paper arrives at a method of harmonic and reactive current real-time detection applied on active power filter based on the three-phase circuit instantaneous reactive power theory. With Matlab simulation software, a research on simulation of harmonic detection means is carried out, and an analysis of the simulation result is presented. The result indicates: the harmonic detection means based on instantaneous reactive power theory can detect harmonic and reactive component in three-phase current precisely and real-time, to supply reliable harmonic and reactive current for harmonic restraint and reactive power compensation. It could provide reliable indicator parameters for research and development of active power filter.

scholarly journals Hysteresis Control for Shunt Active Power Filter under Unbalanced Three-Phase Load Conditions

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Z. Chelli ◽  
R. Toufouti ◽  
A. Omeiri ◽  
S. Saad
Keyword(s):  
Reactive Power ◽  
Harmonic Distortion ◽  
Active Power Filter ◽  
Active Power ◽  
Harmonic Suppression ◽  
Nonlinear Loads ◽  
Shunt Active Power Filter ◽  
Power Filter ◽  
Three Phase ◽  
Control Scheme

This paper focuses on a four-wire shunt active power filter (APF) control scheme proposed to improve the performance of the APF. This filter is used to compensate harmonic distortion in three-phase four-wire systems. Several harmonic suppression techniques have been widely proposed and applied to minimize harmonic effects. The proposed control scheme can compensate harmonics and reactive power of the nonlinear loads simultaneously. This approach is compared to the conventional shunt APF reference compensation strategy. The developed algorithm is validated by simulation tests using MATLAB Simulink. The obtained results have demonstrated the effectiveness of the proposed scheme and confirmed the theoretical developments for balanced and unbalanced nonlinear loads.

Summary of Research Status of Active Power Filter

2014 ◽  
Vol 721 ◽  
pp. 587-590
Author(s):  
Hai Yang Wang
Keyword(s):  
Power Electronics ◽  
Reactive Power ◽  
Control Method ◽  
Rapid Development ◽  
Active Power Filter ◽  
Active Power ◽  
Current Control ◽  
Power Filter ◽  
Power System Harmonics ◽  
Working Principle

Due to the rapid development of modern rapid power electronics, power system harmonics are also increasingly serious harm, in order to effectively suppress harmonics to improve power quality, active power filter APF came into being, it can be effective for reactive power and frequency, amplitude harmonic changes are real-time tracking compensation. Currently, APF power electronics technology has become a major research topic. This article describes the basic working principle of harmonic current detection method and compensation current control method, the main circuit type of active power filter.

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