Design and performance of an active power filter for unbalanced loads

2003 ◽  
Author(s):  
Dawei Gao ◽  
Qingchun Lu ◽  
Xlaorui Sun
Keyword(s):  
Active Power Filter ◽  
Active Power ◽  
Power Filter ◽  
And Performance ◽  
Unbalanced Loads

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

Electronics ◽  
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.

scholarly journals The Influence of Shunt Active Power Filter on Stability and Performance in Considering Time-Delay

2013 ◽  
Vol 2013 ◽  
pp. 1-9
Author(s):  
Tao Li ◽  
Yongqiang Liu
Keyword(s):  
Time Delay ◽  
Performance Index ◽  
Great Influence ◽  
Active Power Filter ◽  
Stability Margin ◽  
Delay System ◽  
Active Power ◽  
Linear Matrix ◽  
Power Filter ◽  
And Performance

The existence of time-delay in active power filter (APF) has a great influence on its stability and performance. Hence, this paper deals with the problems of solving the delay margin, the maximal delay which allows the closed-loop system to retain stable, and minimizing the performance index for a givenH∞controller. Firstly, for the given time-delay system and controller, a Lyapunov-Krasovskii functional is used to derive a delay-dependent stability criterion. And a modified Lyapunov-Krasovskii functional is used to obtain less conservative results. Secondly, the mathematical model of APF with time-delay is built, and the two problems already mentioned can be dealt with via transforming them into one of the basic problems of linear matrix inequality (LMI). Finally, the relationships between the delay stability margin and some parameters have been investigated, and the performance index has been discussed in considering time-delay. The effectiveness of the proposed method is verified by simulation studies.

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