A microgrid harmonic and interharmonic detection device and detection method based on stm32f107vct6

Abstract

The invention discloses a device and method for detecting a micro grid harmonic wave and inter-harmonics based on STM32F107VCT6, and belongs to the technical field of power quality detection. The device comprises a signal acquisition module, a signal processing module and a signal display output module. A Hall voltage current sensor is adopted in the signal acquisition module to serve as a collector for collecting power grid three-phase voltage electric current. The signal processing module comprises a switching circuit of voltage and current, an anti-aliasing filter circuit, an electrical level regulator circuit, a core processor STM32F107VCT6 and a processor peripheral circuit. The output end of the electrical level regulator circuit is connected with the input end of an A / D converter of the core processor STM32F107VCT6. The method comprises the processes of collection and processing of signals. The device and method meets the requirement of computational accuracy and computational speed, and meets flexibility and convenience of the structure.

Description

technical field [0001] The present invention belongs to the technical field of power quality detection, in particular, relates to a device and detection method capable of detecting harmonics and inter-harmonics of a micro-grid system, and more specifically, relates to a micro-grid harmonic and inter-harmonic based on STM32F107VCT6 Harmonic detection device and detection method. Background technique [0002] At present, most of the known harmonic detection devices are aimed at large power grids, and mostly detect harmonics, and there are not many detection devices for inter-harmonics. At present, the IEC6100-4-7 standard and most of the existing harmonic detection devices adopt the FFT (FastFourierTransform, Fast Fourier Transform) algorithm for the detection of interharmonics. However, the traditional FFT algorithm is relatively accurate for detecting integer harmonics, but when there are a large number of non-integer harmonics in the power grid, the algorithm will have lar...

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Problems solved by technology

[0008] Aiming at the problems of slow computing speed, need to expand RAM and ROM, and complex hardware circuits in the detection of micro-grid harmonics in the prior art, the present invention provides a micro-grid harmonic and inter-harmonic detection device and detection method based on STM32F107VCT6 , it not only satisfies the calculation accuracy and calculation speed, but also meets the flexibility and convenience in structure

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