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This paper presents a new discrete short time Fourier transform (DSTFT) implementation algorithm, called nonuniform discrete short time Fourier transform (NDSTFT) for real time estimation of power components according to the IEEE Standard 1459-2000. The proposed NDSTFT algorithm is capable of detecting the spectrum of each finite short time section of the power signals at arbitrarily located specified frequencies and is able to perform sample by sample processing, thus, suitable for real time implementation in uniprocessor system. The NDSTFT based power components estimation algorithm has been implemented in real time by means of a Texas Instruments TMS320VC5416 digital signal processor. Fast and accurate estimation of power components has been observed utilizing the developed scheme.