Research Of Harmonic Measurement In Power System Based On DSP

Along with the energy conservation technology and the automated technology promotion, the electric power electronic installation like variable current equipment, the frequency conversion equipment and so on, the capacity expands day by day and the quantity increases day by day, which cause more and more serious higher harmonic in the electrical network the. Harmonic is a potential threat to security, stability and conversion working of the power system, has brought the enormous influence for the around electricity environment, therefore, the harmonic have been considered as a big environmental damage of electrical network., The research and the new technology for improving electrical energy have already become hotspot in electrical power system research in recent years. But to the electrical energy quality surveillance, depends on the accurate and reliable metering equipment and the scientific and reasonable measuring technique.At present, the research on harmonic of the whole world is extremely active, the more widespread used measuring technique includes: Withdrawing the fundamental wave to divide the mensuration, the examination method based on the instant reactive power, the harmonic measurement based on the wavelet transformation, auto-adapted examination method and the measuring method based on the Fourier transformation. The paper has used a fixed geometry structure butterfly shaped algorithm based on fast Fourier (FFT),and uses the duplicate sequence algorithm to perform for FFT to improve. This method can save half operation time comparing to classical base-2 fast Fourier, thus can greatly enhance the efficiency of the equipment.This design that this article has introduced takes the monolithic integrated circuit as the control core, the digital signal processing chip carries out the data processing function. The monolithic integrated circuit completes the overall system control and keyboard processing as the host controller, and...