Study Harmonic Current Detection and Compensation of Active Power Filter in Power System of Platform

2012 ◽  
Author(s):  
Hong-chun Liu ◽  
Shu-guang Sun
Keyword(s):  
Power System ◽  
Active Power Filter ◽  
Active Power ◽  
Harmonic Current ◽  
Power Filter ◽  
Current Detection

An Active Power Filter Controller Based on Dual-DSPs in Low-Voltage Power System

2013 ◽  
Vol 291-294 ◽  
pp. 2302-2307
Author(s):  
Wan Feng Zou ◽  
Lei Zhang
Keyword(s):  
Power System ◽  
High Speed ◽  
Low Voltage ◽  
Active Power Filter ◽  
Active Power ◽  
Harmonic Current ◽  
Nonlinear Load ◽  
Power Filter ◽  
And Control

To compensate harmonics from nonlinear load, the controller of Active Power Filter (APF) need to detect harmonic and generate compensation current in high speed. APF controller functions are divided into two parts: outside controller part and inside controller part. Inside controller part detect harmonic current and control the IGBT to generate grid harmonics current. Outside controller part detect common power parameters and generate signal of management in main circuit. An experiment circuit of APF Controller is established. Some experiments are presented here.

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.

scholarly journals An Improved Harmonic Current Detection Method Based on Parallel Active Power Filter

2017 ◽  
Vol 199 ◽  
pp. 012143
Author(s):  
Zhiwu Zeng ◽  
Yunxiang Xie ◽  
Yingpin Wang ◽  
Yuanpeng Guan ◽  
Lanfang Li ◽  
...  
Keyword(s):  
Detection Method ◽  
Active Power Filter ◽  
Active Power ◽  
Harmonic Current ◽  
Power Filter ◽  
Current Detection

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.

scholarly journals Design and Implementation of Active Power Filter for Harmonics Elimination using Intelligent Control Controller

2020 ◽  
Vol 8 (5) ◽  
pp. 5161-5164
Keyword(s):  
Fuzzy Logic ◽  
Power System ◽  
Intelligent Control ◽  
Active Power Filter ◽  
Active Power ◽  
Harmonic Current ◽  
Shunt Active Power Filter ◽  
Power Filter ◽  
Design And Implementation ◽  
System A

Non-linear loads generate harmonic current in power system. These harmonics currents can produce various type of effect that is harmful to the power system. A system required to filter out these harmonics. Design and assessment of shunt active power filter (SAPF) for harmonics elimination using intelligent control controller (fuzzy logic) present in this paper. Generally, conventional phase-locked loop (PLL) technique are used for eliminate harmonics. In PLL technique based system contains more harmonic. This paper compared without filter versus with filter at different loads. Results shows that intelligent control controller based system contain minimum harmonic contain as compared to conventional controller

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