H. Shokrollah Timorabadi

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The supply of high quality electrical energy in power systems requires access to a synchronized phasor that is measured at various locations via a phase measurement unit (PMU). These data are then tagged with timestamps, provided by a Global Positioning System (GPS), and then sent to a control unit. The existing methods place demanding constraints on the(More)
This paper presents design procedures for two adaptive bandpass filters with variable sample rates and fixed point implementations. Each bandpass filter can be used as an integral part of a multirate phase lock loop (MPLL) for extracting the fundamental component from an input signal. The MPLL provides synchronization information from zero crossings of(More)
Synchronization is of concern in AC power systems. Existing synchronization algorithms are hardware intensive. A single phase synchronization scheme referred to as a multi-rate phase locked loop (MPLL) has been reported. The stability of the MPLL is influenced by amplitude variations. An amplitude estimation module based on a fast Fourier transform (FFT)(More)
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