Title :
A new method for interharmonic detection based on harmonic filtration
Author :
Cao Yingli ; Yang Yong ; Xu Tongyu
Author_Institution :
Sch. of Inf. & Electr. Eng., Shenyang Agric. Univ., Shenyang, China
Abstract :
A crucial problem for improving interharmonic detection precision is how to reduce the influence from harmonic spectral leakage. This paper analyzes the character of the power system´s spectral leakage, and puts forward a new interharmonic detection method. First, measures harmonic component with windows and interpolated FFT, then, filters away the harmonic component from the original signal, last, uses FFT to analyze the sample signal with fixed sampling frequency and gets the interharmonic component without harmonic spectral leakage interference. The example shows that, compare to the traditional detection method, this method does not need synchronization procession. So it has such advantages as smaller calculation amount, higher detection precision, it can be used in the field of interharmonic´s real-time detection.
Keywords :
fast Fourier transforms; power system harmonics; harmonic filtration; harmonic spectral leakage interference; interharmonic detection; interpolated FFT filters; power systems spectral leakage; Filtration; Frequency measurement; Harmonic analysis; Leak detection; Power harmonic filters; Power system analysis computing; Power system harmonics; Power system measurements; Signal analysis; Signal sampling; harmonic filtration; interharmonic; interpolated FFT; spectral leakage;
Conference_Titel :
Power Electronics and Intelligent Transportation System (PEITS), 2009 2nd International Conference on
Conference_Location :
Shenzhen
Print_ISBN :
978-1-4244-4544-8
DOI :
10.1109/PEITS.2009.5406972