Harmonic detection device based on DSP and detection method thereof

Abstract

The invention discloses a harmonic detection device based on a DSP and a detection method thereof. The harmonic detection device comprises a data collecting module, a DSP chip, a CPLD chip, a man-machine interaction module and an upper computer, wherein the CPLD chip is connected with the DSP chip and the upper computer connected through an Ethernet communication interface, and the DSP chip is connected with the data collecting module and a power source module. The harmonic detection device based on the DSP and the detection method thereof adopt a data processing device with the main DSP chip and the auxiliary CPLD chip and adopt the DSP chip to run windowing FFT combined wavelet packet transformation, signals are processed rapidly through the data collecting module, the operation speed is effectively increased, large-capacity calculation can be realized, the problem that the recognition and positioning speed is low in the prior art is effectively resolved, and the harmonic detection device based on the DSP and the detection method thereof are high in accuracy, rapid in recognition and positioning and high in stability and have the advantages of being simple in structure and detection method.

Description

technical field [0001] The invention belongs to the field of power quality detection, and in particular relates to a DSP-based harmonic detection device structure. Background technique [0002] In recent years, with the promotion of automation technology, various non-linear power electronic devices, such as converter equipment, frequency conversion equipment, etc., have been expanding in capacity and increasing in number. The direct manifestation of its impact on power devices is the periodic distortion of current and voltage waveforms. , that is, the generation of so-called power harmonics, which can reduce the efficiency of production, transmission and utilization of electric energy; cause electrical equipment to overheat, generate vibration and noise, and age insulation, shorten service life, and even cause partial Parallel resonance or series resonance is generated, which amplifies the harmonic content and causes the capacitor equipment to burn out. [0003] Therefore, ...

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Problems solved by technology

[0004] However, market research found that most harmonic detectors such as imported FLUKE, Texas Instruments and other domestic brands such as Changsha Weisheng, Zhiyuan Electronics and other brands are expensive, the operating efficiency of the chip needs to be improved, and the algorithm is not enough to achieve higher precision harmonic detection. Wave detection, and the interaction effect with the host computer is not stable enough

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