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Harmonic Detection for Hybrid Filter
2011Harmonic distortion can be caused by both active and passive nonlinear devices in a power system. These harmonic currents can cause voltage distortion and excessive power losses in the system. To maintain high quality power supply, the system harmonic levels must be measured and kept under control.
Yunjing Liu, Fengwen Wang
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Sequential detection of almost-harmonic signals
IEEE Transactions on Signal Processing, 2003To detect a purely harmonic signal, it is difficult to beat a fast Fourier transform (FFT). However, when the signal is very long and weak, Parker and White (1999) have shown that a sequential probability ratio test (SPRT) operating on magnitude-square FFT data is far more efficient.
Stefano Maranò 0001 +2 more
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An Analytical Method of Inter-harmonic Detection
2015 IEEE 12th Intl Conf on Ubiquitous Intelligence and Computing and 2015 IEEE 12th Intl Conf on Autonomic and Trusted Computing and 2015 IEEE 15th Intl Conf on Scalable Computing and Communications and Its Associated Workshops (UIC-ATC-ScalCom), 2015A method of inter-harmonic detection is presented which based on wavelet transform, After the sampled signal modulated by specific function, the structure of the signal frequency has changed. The methods which based on MALLAT algorithm of wavelet multiresolution have a high frequency resolution in the low-frequency band, Then The inter-harmonics ...
Yihong He, Fangguo Li
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An Improved Adaptive Harmonic Detection Algorithm
2018 24th International Conference on Automation and Computing (ICAC), 2018Active power filter (APF) can effectively suppress harmonic current, and harmonic detection is an important part which can directly influence the effect of APF. Based on the traditional adaptive noise cancellation theory (ANCT) harmonic detection method, this paper proposes an improved variable step size adaptive harmonic detection algorithm.
Zhijun Li, Yanan Wang, Baihui Cui
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Research of harmonic distortion power for harmonic source detection
2016 17th International Conference on Harmonics and Quality of Power (ICHQP), 2016The detection of harmonic source is important for harmonic responsibility sharing and mitigation. In this paper, a new indice for harmonic source detection is investigated. This indice is a power component decomposed from apparent power recommended by IEEE Std. 1459-2010, named harmonic distortion power. The theoretical effectiveness of this indice for
null Chang-Song Li +4 more
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Energies, 2019 In an AC microgrid, harmonic distortion is mainly caused by power electronic equipment and nonlinear loads. In this paper, linear active disturbance rejection control (LADRC) is used to control the fundamental current at the point of common coupling (PCC)
Jun-Wei Lu
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Scratch detection via underdamped harmonic motion
Object recognition supported by user interaction for service robots, 2003This paper presents SDHO (scratch detection via harmonic oscillator), a generalized model to detect line scratches on digital images. The line scratch profile is now a solution of a second order homogeneous differential equation, depending exclusively on the width and the brightness of the scratch.
BRUNI, VITTORIA, VITULANO D.
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An improved method for harmonic detecting
2008 7th World Congress on Intelligent Control and Automation, 2008This paper presents an improved method for harmonic detecting based on instantaneous reactive power theory. It changes the distribution of zero-pole by inserting a leading network in harmonic detecting system and the harmonic detecting system has the characters of ideal high-pass filter.
null Jinglei Guo, null Yong Wu
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Passive telemetry by harmonics detection
Proceedings of 18th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2002A wireless method is proposed to read-out a pressure sensor without active electronics in the implant. This passive approach is based on L-C-resonance. It reduces the implant size and improves its long term use since there are no batteries involved.
K. Van Schuylenbergh, R. Puers
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An improved harmonic detection algorithm
2017 Chinese Automation Congress (CAC), 2017Accurate and fast detection of harmonics is the basis for active filters to work regularly. Propose an improved generalized IP-IQ harmonic detection algorithm. Analyzed generalized IP-IQ harmonic detection algorithm, pointed out two advantages of this algorithm: It can separate any order of harmonic and detect harmonic correctly even if the voltage of ...
Wenxin Wang +3 more
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