DFT and DSP-based electric energy measurement algorithm of harmonic source load

In terms of electric energy measurement principle, combined with relative mathematic theory, this paper analyzes the harmonic power's impact on linear and harmonic source load and unreasonable mode now. Based on this, using DSP technique, combing with the discrete Fourier transform, we set up a new calculation algorithm of electric power measurement fairly and with no fault to harmonic source load, and prove its reasonability and validity in practice.