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The Discrete Fourier Transform (DFT) is still a widely-used tool for analyzing and measuring both stationary and transient signals in power systems. However, the misapplications of DFT can lead to incorrect results caused by some problems such as aliasing effect, spectral leakage and picket-fence effect. A strategy of Piecewise-overlapped Group-harmonic Energy Restoring (PGER) algorithm is developed...
The fast Fourier transform (FFT) is still a widely-used tool for analyzing and measuring both stationary and transient signals with power system harmonics in power systems. However, the misapplications of FFT can lead to incorrect results caused by some problems such as aliasing effect, spectral leakage and picket-fence effect. A strategy of group-harmonic weighting distribution is proposed for system-wide...
Traditional methods to measure power system harmonics employ either the power harmonic analyser or the software package such as Matlab. They, however, usually have limited capability in the Internet connection and/or human graphical interface even for multi-point measurement. In this paper, a PC-based virtual instrument (VI) to implement a remote multi-point power system harmonics analysis and monitoring...
Traditional methods to measure power system harmonics employ the power harmonic analyser or the software package such as Matlab or others. They, however, have certain limitations in the graphical programming environment and further applications for remote monitoring and control performance. This paper presents a virtual instrument (VI) that can carry out power system harmonics measurement based on...
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