Journal ArticleDOI
Accurate measurement of power system frequency using a digital signal processing technique
TLDR
The proposed digital signal processing technique for measuring the operating frequency of a power system provides correct and noise-free estimates for near-nominal, nominal, and off- Nominal frequencies in about 25 ms, and it requires modest computations.Abstract:
This paper describes the design, computational aspects, and implementation of a digital signal processing technique for measuring the operating frequency of a power system. The technique provides correct and noise-free estimates for near-nominal, nominal, and off-nominal frequencies in about 25 ms, and it requires modest computations. The proposed technique is implemented using a DSP-based board and has been extensively tested using voltage signals obtained from a dynamic frequency source and from a power system. Some test results are presented in the paper.read more
Citations
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Journal ArticleDOI
Estimation of Power System Frequency Using an Adaptive Notch Filter
TL;DR: An algorithm based on the concept of adaptive notch filter (ANF) is proposed for estimation of power system frequency that does not employ voltage-controlled oscillator (VCO), which makes its structure much simpler for implementations.
Journal ArticleDOI
Adaptive Phasor and Frequency-Tracking Schemes for Wide-Area Protection and Control
TL;DR: In this paper, an adaptive complex bandpass filter derived from the exponentially modulated filter bank theory has been devised, which is built from freely chosen low-pass filter prototypes that fulfill the WECC requirements.
Journal ArticleDOI
Real-Time Estimation of Power System Frequency Using Nonlinear Least Squares
TL;DR: In this article, a nonlinear least squares method for measuring the power system frequency is presented, wherein the voltage at the measurement point is modeled by using the Fourier series. But the robustness of this algorithm with respect to change in various parameters is studied through simulation and the results are validated by hardware implementation using a Virtex IV field-programmable gate array.
Proceedings ArticleDOI
Estimation of Power System Frequency Using Adaptive Notch Filter
TL;DR: In this paper, an adaptive notch filter (ANF) is proposed for power system frequency estimation, which is a second-order notch filter that is further furnished with a nonlinear differential equation to update the frequency.
Journal ArticleDOI
Dynamic Phasor and Frequency Measurements by an Improved Taylor Weighted Least Squares Algorithm
TL;DR: It is shown that the proposed GTWLS-IpDFT algorithm can comply with the P-class or the M-class of performances in all the considered testing conditions when an appropriate number of waveform cycles is considered and the most significant disturbances are removed from the analyzed waveform.
References
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Journal ArticleDOI
A New Measurement Technique for Tracking Voltage Phasors, Local System Frequency, and Rate of Change of Frequency
TL;DR: In this paper, the frequency and rate-of-change of frequency at the bus can also be determined from the positive sequence voltage phase angle, and the theoretical basis of these computations and results of experiments performed in the AEP power system simulation laboratory are also outlined.
Journal ArticleDOI
Voltage phasor and local system frequency estimation using Newton type algorithm
TL;DR: A new approach to the design of a digital algorithm for voltage phasor and local system frequency estimation is presented using Newton's iterative method, which showed a very high level of robustness as well as high measurement accuracy over a wide range of frequency changes.
Journal ArticleDOI
A Least Error Squares Technique For Determining Power System Frequency
M.S. Sachdev,M. M. Giray +1 more
TL;DR: An algorithm for measuring frequency at a power system bus is presented and the effects of key parameters, that affect the performance of the algorithm, are discussed.
Journal ArticleDOI
Optimal Estimation Of Voltage Phasors And Frequency Deviation Using Linear And Non-Linear Kalman Filtering: Theory And Limitations
TL;DR: In this paper, two techniques for optimal tracking of power system voltage phasors and frequency deviation were presented, one based on a two-state linear Kalman filter model and the other based on three-state extended Kalman filters.
Journal ArticleDOI
Microprocessor Implementation of a Fast and Simultaneous Amplitude and Frequency Detector for Sinusoidal Signals
TL;DR: A microprocessor-controlled implementation of a fast and simultaneous amplitude and frequency detector for sinusoidal signals is introduced that takes samples within a fraction of the period of the signal being measured, thereby minimizing the measurement time.