scholarly journals Stability analysis of hybrid active power filter

2014 ◽  
Vol 62 (2) ◽  
pp. 279-286
Author(s):  
D. Buła ◽  
M. Pasko
Keyword(s):  
Stability Analysis ◽  
Active Power Filter ◽  
Active Power ◽  
Loop Control ◽  
Passive Filter ◽  
Power Filter ◽  
Hybrid Active Power Filter ◽  
Analysis System ◽  
The Stability ◽  
Hybrid Filters

Abstract In the paper the analysis of a three-phase hybrid active power filter stability has been presented. Configuration with a single tuned passive filter was used as an example. However, the analysis can be applied to similar configurations of hybrid filters with closed loop control. The article presents a model of the analyzed system in the frequency domain. The division of the model into two independent systems, for positive and negative components, allowed to apply the Nyquist criterion for the stability analysis in this case. As a part of the analysis, the effect of delays, control signal filter parameters, and passive filter parameters have been examined. Based on the presented stability analysis, system parameters for the experimental model of a hybrid power filter have been selected. Finally, experimental results confirming the validity of the analysis have been shown.

Research on Harmonic Suppression of Electric Railway Based on Hybrid Active Power Filter

2010 ◽  
Vol 439-440 ◽  
pp. 994-998
Author(s):  
Xiang Zheng Xu ◽  
Bai Chao Chen
Keyword(s):  
Specific Property ◽  
Active Power Filter ◽  
Active Power ◽  
Supply System ◽  
Fundamental Wave ◽  
Harmonic Suppression ◽  
Passive Filter ◽  
Power Filter ◽  
Hybrid Active Power Filter ◽  
Electric Railway

According to the specific property of traction supply system, a novel hybrid active power filter (HAPF) is designed in this paper. The new HAPF topology is that, after the impedance of fundamental wave is in parallel with the active power filter (APF), it is series connected passive filter. The kinds of structure can reduce the VA rating of the APF greatly. The small rating active power filter is used to improve filtering characteristics of the passive filter and suppress possible resonance between the traction supply system impedance and the passive filter. Through MATLAB simulation, it shows that the control strategy of power quality is apparently effective, and it plays an important role in enhancing the reliability of transformer station and the operating security of electric railway.

scholarly journals ANALYZE THE EFFECT OF TIME DELAY ON THE STABILITY OF HYBRID ACTIVE POWER FILTER

2022 ◽  
Vol 36 (06) ◽  
Author(s):  
CHAU MINH THUYEN
Keyword(s):  
Time Delay ◽  
Active Power Filter ◽  
Active Power ◽  
Practical Significance ◽  
Stable Domain ◽  
Power Filter ◽  
Hybrid Active Power Filter ◽  
The Stability ◽  
And Control ◽  
The Mathematical Model

Hybrid Active Power Filter (HAPF) has highly effective in improving the power quality of power system. In this paper, a stable analysis of HAPF considering the time delay was made. The mathematical model of HAPF with time delay has been established. Based on that, the stable domain of the HAPF parameters was determined based on the Routh’s stability standard. Simulation results based on Matlab software have shown that: time delay has a marked impact on the stability of the HAPF system. This research has practical significance in the design and control of HAPF in real system.

scholarly journals A Novel Hybrid Active Power Filter with Multi-Coupled Coils

Electronics ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 998
Author(s):  
Gang Xue ◽  
Baichao Chen ◽  
Cuihua Tian ◽  
Jiaxin Yuan ◽  
Yuxiong Zhou ◽  
...  
Keyword(s):  
Power Grid ◽  
Active Power Filter ◽  
Magnetic Coupling ◽  
Active Power ◽  
Passive Filter ◽  
Power Filter ◽  
Hybrid Active Power Filter ◽  
Filtering Effect ◽  
Lc Filter ◽  
Coupled Coils

This paper proposes a hybrid active power filter (HAPF) with multi-coupled coils, applied to a medium- and high-voltage power grid. The passive filter of the proposed HAPF adopts the structure of multi-coupled coils to compress the traditional multiple LC branches into one branch which presents the same harmonic impedance characteristics as the former multiple LC branches. In the active power filter of the HAPF, a coupled inductor, instead of a transformer, is used to connect with the passive filter. The coupled inductor has mutual inductances with inductors of the passive filter. Through spatial magnetic coupling, the active power filter can inject compensation current into the power grid to eliminate the residual harmonics and absorb active power from the power grid to maintain the DC capacitor voltage. When the active power filter is open-circuited or short-circuited, the filtering effect of the passive filter can still be guaranteed, which improves the reliability of the filter. The benefits of the proposed HAPF with excellent harmonic filtering performance are that the inductors occupy only 1/3 space as compared with traditional three-tuned LC filter, and very small power of the active power filter. The feasibility of the proposed HAPF is verified through simulations and experiment.

scholarly journals Design of shunt hybrid active power filter (SHAPF) to reduce harmonics in AC side due to Non-linear loads

2018 ◽  
Vol 9 (4) ◽  
pp. 1926
Author(s):  
Madhu B R ◽  
Dinesh MN ◽  
Ravitheja BM
Keyword(s):  
Active Power Filter ◽  
Active Power ◽  
Active Filter ◽  
Control Technique ◽  
Band Pass Filter ◽  
Shunt Active Filter ◽  
Passive Filter ◽  
Power Filter ◽  
Hybrid Active Power Filter ◽  
Non Linear

<p>The quality of power is a major concern because of harmonics in the lines due to various sources. Passive filters have been used to eliminate the specific harmonics. In this paper shunt hybrid active power filter which consists of shunt active filter and shunt passive filter is designed to reduce harmonics in source   side for non linear loads. The shunt passive filter includes a tuned RLC circuit that behaves like a band-pass filter for a particular harmonic content. The shunt active filter is a VSI that produces reverse harmonic current based on Clarke’s transformation. This paper presents the control strategy by implementing instantaneous reactive power theory to design Shunt Hybrid Active Filter (SHAPF) for a non linear load. The proposed control technique is simulated using MATLAB SIMULINK, Results prove there is considerable reduction in THD of source current from 30.35% to 3.25% with the proposed controller on   shunt hybrid active power filter.   The performance of SHAPF is better than Passive and Shunt Active Power Filters.</p><p> </p>

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