Study on an Improved Single-phase Harmonic Current Detection Algorithm

2012 ◽  
Author(s):  
Zujun Ding ◽  
Sen Wang ◽  
Zhen Guo ◽  
Guang Zeng
Keyword(s):  
Single Phase ◽  
Detection Algorithm ◽  
Harmonic Current ◽  
Current Detection

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

An Improved Harmonic Current Detection Method Based on Variable Forgetting Factor RLS Algorithm

2013 ◽  
Vol 291-294 ◽  
pp. 2459-2463
Author(s):  
Minh Guang Vu ◽  
Wei Han ◽  
Da Zhi Wang ◽  
Yun Lu Li
Keyword(s):  
Dynamic Process ◽  
Detection Algorithm ◽  
Recursive Least Squares ◽  
Forgetting Factor ◽  
Harmonic Current ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Variable Forgetting Factor ◽  
The Impact ◽  
Current Detection

The effects of compensating and restraining the power system harmonics using active power filter are determined by the detection precision and its dynamic response characters. To improve both of them, a harmonic current detection algorithm based on variable forgetting factor Recursive Least-Squares algorithm is presented. The occurrence of the dynamic process is identified firstly by the judgment condition which is given by the algorithm, and then the forgetting factor is assigned dynamically, so that the convergent speed is significantly improved. The algorithm overcomes the impact of low-pass filter of traditional p-q or ip-iq algorithm, and releases the contradiction cased by the conflicting requirements of forgetting factor value between steady process and dynamic process. So it has better dynamic performance. Simulation and experiments prove the validity and feasibility of the approaches.

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.

Detection Method for Single-Phase Random Harmonic Current without PLL

2015 ◽  
Vol 719-720 ◽  
pp. 622-629
Author(s):  
Li Ran Wu ◽  
Ming Li Wu
Keyword(s):  
Single Phase ◽  
Detection Method ◽  
Active Power Filter ◽  
Response Speed ◽  
Active Power ◽  
Detection Accuracy ◽  
Harmonic Current ◽  
Power Filter ◽  
Low Pass ◽  
Current Detection

The harmonic current detection is an essential part for an active power filter (APF). A random harmonic current detection method for single-phase active power filter without the phase locked loop (PLL) is proposed. The detection errors caused by low pass filters are analyzed, and an improved method has been proposed which can increase the detection accuracy and response speed. This method can detect the single order harmonic current and decompose it. Theoretical analysis and simulation results show the validity of the proposed method.

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