Series Arc Detection Method using Voltage Fluctuation in Electrical Equipment

Voltage fluctuation and flicker are among the most serious impacts of wind power generation on power quality. To assess and suppress voltage fluctuation and flicker, an accurate detection method is necessary. According to characteristics of flicker caused by wind farm, a systematic, accurate and fast flicker detection method was introduced. First, with Mathematical Morphology (MM) filter, noises contained in flicker signal were filtered out. Then to the filtered flicker curves, a track method based on Hilbert transform was adopted to pick out the flickers envelope which is the base of attaining relevant parameters of flicker. At last, the envelope was simultaneously analyzed in both time-domain and frequency-domain by a novel non-stationary signal processing method, the Hilbert-Huang transform (HHT). Simulations show that with this method, time, frequency and amplitude information of non-stationary flicker signals can be accurately detected and the proposed method is effective in the analysis of flickers caused by wind farm.

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Voltage Flicker Detection Method Based on Teager Operator

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.677.394 ◽

2013 ◽

Vol 677 ◽

pp. 394-399

Author(s):

Shuai Yuan ◽

Jian Gang Bi

Keyword(s):

Time Resolution ◽

Detection Method ◽

Detection Accuracy ◽

Comparison Result ◽

Voltage Fluctuation ◽

Simulation Results ◽

Voltage Flicker ◽

The Hilbert Transform ◽

Mathematical Derivation ◽

Demodulation Method

Fast and accurately detection of voltage fluctuation components is very important to voltage flicker measurement. A novel voltage flicker demodulation algorithm based on Teager operator is proposed in this paper. The principle of the Teager operator demodulation approach is introduced, and the mathematical derivation of the proposed algorithm is described. The proposed algorithm is fast and requires only a few samples to calculates, therefore, it has excellent time resolution. The simulation results prove that the new algorithm can track the flicker signal of unifrequency or multifrequency amplitude modulation wave successfully. The comparison result of proposed method, the square demodulation method and the Hilbert transform demodulation method shows that the proposed method has obvious advantages of calculation speed and detection accuracy.

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Research on detection method for spatial discharge of high voltage electrical equipment based on ultraviolet monitoring video

2017 IEEE 5th International Symposium on Electromagnetic Compatibility (EMC-Beijing) ◽

10.1109/emc-b.2017.8260449 ◽

2017 ◽

Author(s):

Yi Luo ◽

Yang Wu ◽

Jun Hu ◽

Lian Duan ◽

Wenzhi Chang ◽

...

Keyword(s):

High Voltage ◽

Detection Method ◽

Electrical Equipment

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A novel detection method for improvement voltage fluctuation

2013 IEEE Student Conference on Research and Developement ◽

10.1109/scored.2013.7002533 ◽

2013 ◽

Author(s):

Abdollah Shokri ◽

Hussain Sharif ◽

Azah Mohammad ◽

Shervin Shokri

Keyword(s):

Detection Method ◽

Voltage Fluctuation

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An Infrared Detection Method Used In Electrical Equipment Fault Diagnosis

Proceedings of the 2016 4th International Conference on Machinery, Materials and Computing Technology ◽

10.2991/icmmct-16.2016.287 ◽

2016 ◽

Author(s):

Feng Li ◽

Jianfeng Li ◽

Yu Meng ◽

Rui Tong ◽

Ren Liu ◽

...

Keyword(s):

Fault Diagnosis ◽

Detection Method ◽

Electrical Equipment ◽

Infrared Detection

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Research on Arc Fault Characteristics and Detection Method

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.331.133 ◽

2013 ◽

Vol 331 ◽

pp. 133-136

Author(s):

Shao Hua Ma ◽

Jie Qiu Bao ◽

Zhi Yuan Cai ◽

Chui Yi Meng

Keyword(s):

Fault Detection ◽

Detection Method ◽

Electrical Equipment ◽

Testing System ◽

Fault Current ◽

Current Waveform ◽

Fault Testing ◽

Time Frequency ◽

Set Up ◽

Fault Mechanism

According to the arc fault mechanism of production and refer to UL1699 standard,arc fault testing system is set up,and the current waveform of arc fault and electrical equipment are collected. By analyzing time-frequency characteristics of arc fault current,paper indicates the boundedness of traditional arc fault detection method and present a brand new arc fault detection method based on fractal theory.The effectiveness and accuracy of this method is tested and verified with simulation.

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Solid-phase immunoelectron microscopy for rapid diagnosis of enteroviruses

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100111240 ◽

1984 ◽

Vol 42 ◽

pp. 226-227 ◽

Cited By ~ 1

Author(s):

K. Pegg-Feige ◽

F. W. Doane

Keyword(s):

Electron Microscopy ◽

Cell Culture ◽

Immunoelectron Microscopy ◽

Detection Method ◽

Solid Phase ◽

Protein A ◽

Plant Viruses ◽

Rapid Diagnosis ◽

Virus Diagnosis ◽

Antiviral Antibody

Immunoelectron microscopy (IEM) applied to rapid virus diagnosis offers a more sensitive detection method than direct electron microscopy (DEM), and can also be used to serotype viruses. One of several IEM techniques is that introduced by Derrick in 1972, in which antiviral antibody is attached to the support film of an EM specimen grid. Originally developed for plant viruses, it has recently been applied to several animal viruses, especially rotaviruses. We have investigated the use of this solid phase IEM technique (SPIEM) in detecting and identifying enteroviruses (in the form of crude cell culture isolates), and have compared it with a modified “SPIEM-SPA” method in which grids are coated with protein A from Staphylococcus aureus prior to exposure to antiserum.

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