Active Power Filter Based on Adaptive Detecting Approach of Harmonic Currents

A new hybrid active power filter (NHAPF) and its corresponding controlling method are proposed in the paper, which can be applied in high voltage system. The topology structure of NHAPF is given and its compensating principle is described. The corresponding controlling method is a power direct control, which need not the lower pass filter and improve the performance of detecting precision and velocity. Simulating results show that the feasibility and validity of the compensated system. Harmonic currents and reactive power are compensated well.

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Harmonic Currents Extraction Techniques for a Fix and Adaptive Fuzzy Hysteresis Controlled Shunt Active Power Filter

International Review on Modelling and Simulations (IREMOS) ◽

10.15866/iremos.v8i6.7942 ◽

2015 ◽

Vol 8 (6) ◽

pp. 670

Author(s):

Faiza Kaddari ◽

Benyounes Mazari ◽

Youcef Mihoub

Keyword(s):

Active Power Filter ◽

Active Power ◽

Extraction Techniques ◽

Shunt Active Power Filter ◽

Adaptive Fuzzy ◽

Power Filter ◽

Harmonic Currents

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A New Structure of the Nine Level Inverter Used as Active Power Filter with a Reduced Number of Swiches

International Journal of Power Electronics and Drive Systems (IJPEDS) ◽

10.11591/ijpeds.v9.i1.pp198-209 ◽

2018 ◽

Vol 9 (1) ◽

pp. 198

Author(s):

Fethi Chouaf ◽

Salah Saad

Keyword(s):

Reactive Power ◽

Harmonic Distortion ◽

Active Power Filter ◽

Active Power ◽

Shunt Active Power Filter ◽

Power Filter ◽

Switching Losses ◽

Harmonic Currents ◽

Proposed Model ◽

Power Switches

In the scope of this work, a new structure of the nine level inverter is proposed using a reduced number of power switches. This inverter is used as a shunt active power filter to compensate harmonic currents and the reactive power. The modeling and simulation of the proposed model were carried out in Matlab/Simulink environment. The simulation results show that the filtering performances were achieved despite the reduction of the switches number. It was found that the current waveform becomes purely sinusoidal with a reduction in the harmonic distortion rate (THD) to 2.68%. This implies good compensation of both harmonics and reactive power with a power factor closer to unity. Reducing the switches number allows reducing the switching losses and lowering the duration of the applied voltage supported by the semiconductors. The proposed topology also allows to get simple structure of the inverter with a reduced cost.

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Shunt Active Power Filter: A Review on Phase Synchronization Control Techniques

Electronics ◽

10.3390/electronics8070791 ◽

2019 ◽

Vol 8 (7) ◽

pp. 791

Author(s):

Yap Hoon ◽

Mohd Amran Mohd Radzi ◽

Muhammad Ammirrul Atiqi Mohd Zainuri ◽

Mohamad Adzhar Md Zawawi

Keyword(s):

Power System ◽

Phase Synchronization ◽

Active Power Filter ◽

Active Power ◽

Shunt Active Power Filter ◽

Power Filter ◽

Harmonic Currents ◽

Working Principle ◽

And Performance ◽

Suitable Technique

Owing to the destructive impacts of harmonic currents, the topic of reducing their impacts on power system has attracted tremendous research interests. In this regard, a shunt active power filter (SAPF) is recognized to be the most reliable instrument. It performs by first detecting the harmonic currents that are present in a harmonic-contaminated power system, and subsequently generates and injects corrective mitigation current back into the power system to cancel out all the detected harmonic currents. This means that other than the ability to generate corrective mitigation current itself, it is actually more important to make sure that the SAPF is able to operate in phase with the operating power system, so that the mitigation current can correctly be injected. Hence, proper synchronization technique needs to be integrated when designing the control algorithms of SAPF. This paper critically discusses and analyzes various types of existing phase synchronization techniques which have been applied to manage operation of SAPF; in terms of features, working principle, implementation and performance. The analysis provided can potentially serve as a guideline and provision of information on selecting the most suitable technique for synchronizing SAPF with the connected power system.

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