Control Methods of Active Power Filter

Active power filter (APF) is an important device to compensate harmonic and reactive current in power system control method adopted has a great influence on its performance. The paper introduces several control methods used by APF, including the deadbeat control, single-cycle control, space vector control and so on. After comparing and analyzing their individual advantages and disadvantages, some improvements for APF performance are proposed.

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Design of Single-Phase Active Power Filter

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.329.421 ◽

2013 ◽

Vol 329 ◽

pp. 421-425

Author(s):

Xi Feng Xie ◽

Li Ling Zheng

Keyword(s):

Real Time ◽

Single Phase ◽

Control Method ◽

Design Method ◽

Active Power Filter ◽

Active Power ◽

Control Methods ◽

Experimental Platform ◽

Power Filter ◽

Detecting Method

Aiming at the features of complexity, poor real-time and Low-accuracy of single-phase Active Power Filter (APF), and the problem of impossible parallel computation in the traditional DSP software realization, new design method of APF Based on FPGA is proposed, This paper focuses on the study of the harmonic current detecting method and improves control method of compensate current, it builds an experimental platform with FPGA EP1C12Q240C8 as the controller, the experimental results all support the effectiveness and correctness of the control methods and design methods of APF.

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

Energies ◽

10.3390/en14071951 ◽

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.

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