Simulation and Comparison of Adaptive Detection Algorithm

2011 ◽  
Vol 130-134 ◽  
pp. 2692-2695 ◽  
Author(s):  
Yun Liang Wang ◽  
Guo Cun Li
Keyword(s):  
Adaptive Algorithm ◽  
Detection Algorithm ◽  
Lms Algorithm ◽  
Detection Methods ◽  
Least Mean Square ◽  
Harmonic Detection ◽  
Harmonic Current ◽  
Power Filter ◽  
Simulation Based ◽  
Current Detection

The active power filter has two key link for harmonic current detection and respectively compensation current tracking. This article mainly aims at harmonic current detection link. Firstly, Analysis adaptive harmonic detection methods, then based on over to LMS (Least Mean Square) adaptive algorithm as the research object, in discussing the adaptive algorithm criteria. By comparing several simulation-based LMS algorithm to achieve the results of the filter,analyse the causes of the results.

Method of Harmonic Detection Based on the Wavelet Transform

2013 ◽  
Vol 748 ◽  
pp. 646-650
Author(s):  
Qing Yang Liang ◽  
Zhe Sun ◽  
Chen Fei Zhang
Keyword(s):  
Wavelet Transform ◽  
Active Power Filter ◽  
Active Power ◽  
Detection Methods ◽  
Harmonic Detection ◽  
Harmonic Current ◽  
Time Frequency ◽  
Power Filter ◽  
Detection Technology ◽  
Current Detection

The harmonic current detection technology is one of the key technologies of active power filter technologies. The development of the harmonic current detection technology directly determines the development of the active power filter technologies. Based on this, this paper introduces some basis concepts of wavelet transform and analyzes its time-frequency localization properties, then, describes the harmonic detection methods based on wavelet transform in terms of program building, algorithm selection and wavelet function selection. The results show that the harmonic current detection methods based on wavelet transform are able to compensate the inadequacy of Fourier transforms and can achieve the functions of detecting the steady-state and time-varying harmonic current of the grid in harmonic detection of active power filter.

Research on Improved Power Harmonic Current Detection Methods

2012 ◽  
Vol 241-244 ◽  
pp. 1889-1895
Author(s):  
Jin Yu Wang ◽  
Zhi Hui Shen ◽  
Yu Long Zhou ◽  
Pei Jiang Zhang
Keyword(s):  
Coordinate Transformation ◽  
Reactive Power ◽  
Detection Algorithm ◽  
Detection Methods ◽  
Matlab Simulation ◽  
Harmonic Current ◽  
Two Phase ◽  
Three Phase ◽  
Filtering Effect ◽  
Current Detection

Although Active Power Filter can achieve good filtering effect and accurately compensate harmonic current, it dependents on the proposed current detection algorithm. The paper first discusses the method which is based on transient reactive power theory; the detection method is based on coordinate transformation. After the coordinate transformation is analyzed, the paper advances an harmonic method, this method can remove three-phase to two-phase and two-phase to three-phase coordinate transformation, and effectively reduce the computation, improve the detection speed. At last, the feasibility and validity of the new algorithm have been showed by MATLAB simulation

Analysis of Harmonic Detection of APF&SVG

2012 ◽  
Vol 516-517 ◽  
pp. 1683-1687
Author(s):  
Jing Shuang Shen ◽  
Chuan Wen Jiang ◽  
Yu Jiao Liu
Keyword(s):  
Electric Current ◽  
Detection Method ◽  
Detection Algorithm ◽  
Harmonic Detection ◽  
Harmonic Current ◽  
Current Detection

This paper reviews the harmonic current detection algorithm of APF&SVG. And the new different research of each detection method is introduced. The advantage and disadvantage of each methods is also analyzed. It has provided some references to the electric current detection algorithm choice for the design of the APF and SVG.

A Shunt Active Power Filter for 12 Pulse Converter Using Source Current Detection Approach

2016 ◽  
Vol 7 (1) ◽  
pp. 225 ◽  
Author(s):  
Rajesh T ◽  
Nirmalkumar A
Keyword(s):  
Distribution System ◽  
Active Power Filter ◽  
Active Power ◽  
Detection Methods ◽  
Shunt Active Power Filter ◽  
Power Distribution System ◽  
Power Filter ◽  
Pulse Converter ◽  
Source Current ◽  
Current Detection

A shunt Active Power Filter (APF) with current detection at the source side is considered as a closed-loop system from the view of the whole power distribution system, which is expected with better harmonics filtering performance compared with conventional current detection methods such as load current detection and open loop control.  This paper introduces an efficient source current detection method (direct) control scheme to mitigate the grid current harmonics generated by the twelve pulse converter.  The proposed system uses Control Rectifier (12 –pulse converter) which efficiently regulates the DC voltage by varying the angle of each 6 pulse converter. Moreover, the proposed system uses three winding transformer which eliminates the harmonics during equal angles switching at each six pulse converter which in turn simplifies the operation of the SAPF. The proposed system is simulated in MATLAB SIMULINK to evaluate the performance of the proposed system.

scholarly journals Improved p-q Harmonic Detection Method for Hybrid Active Power Filter

2018 ◽  
Vol 8 (5) ◽  
pp. 2910 ◽  
Author(s):  
Chau Minh Thuyen
Keyword(s):  
Dynamic Response ◽  
Reactive Power ◽  
Detection Method ◽  
Active Power Filter ◽  
Active Power ◽  
Harmonic Detection ◽  
Harmonic Current ◽  
Transient Time ◽  
Power Filter ◽  
Hybrid Active Power Filter

<p>The accuratedetermination of the load harmonic current is one of the important factors, it decides to effect of harmonic filtering and reactive power compensation for Hybrid Active Power Filter. The p-q harmonic detection method has been widely used in determining the harmonic currents of Hybrid Active Power Filter. However, when using this method, the dynamic response of Hybrid Active Power Filter in the transient period will have a large transient time and overshoot whenever the load changes abruptly. Therefore, in this paper an improved p-q harmonic current detection method based on fuzzy logic is proposed, which aims to reduce the overshoot and transient time in transient duration of Hybrid Active Power Filter. In order to compare the dynamic response of conventional and improved p-q harmonic detection methods, simulation results have demonstrated that: the proposed method has a shorter response time, the magnitude of the supply current in the transient time is smaller and the overshoot of the fundamental active and reactive power components is very small. This has a practical significance that contributes to the stability of the Hybrid Active Power Filter system</p>

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