Power System Frequency and Phasor Estimation for a Low-Cost Synchrophasor Device Using the Nonlinear Least-Square Method

Singh, Atul; Parida, S. K.

doi:10.1109/tia.2021.3117932

Cited by 15 publications

(4 citation statements)

References 32 publications

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“…Zero-crossing detection (ZCD) is a widely used hardware solution to achieve synchronization between power electronics converters and the grid [1,2], and to measure frequency and phase angle [3,4]. ZCD circuits are designed to detect the precise moment at which the AC signal crosses the zero-voltage threshold, providing a crucial reference point.…”

Section: Motivation and Backgroundmentioning

confidence: 99%

“…In [12][13][14][15][16][17][18], ZCD circuits got involved in various other synchronizing applications. They also got involved in frequency and phase angle measurement applications in [3,4]. ZCD circuits are usually built using optocouplers [5,11,19], operational amplifiers (op-amps) [19][20][21][22][23], or voltage sensors [6,10,24,25].…”

Section: Motivation and Backgroundmentioning

confidence: 99%

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Experimental comparison of operational amplifier and voltage sensor-based zero-crossing detector circuits for power electronic converters

Al-Dori,

Vural

2023

Journal of Electrical Engineering

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Zero-crossing detection (ZCD) circuits are widely utilized to synchronize power electronics converters with the grid and measure frequency and phase angle. They are usually designed using an operational amplifier (op-amp) or a voltage sensor accompanied by a processing device. The performance profile of these circuits alters depending on many factors, including the input voltage level. An experimental comparison between the two ZCD circuits across various input voltage levels does not appear to be presented in the literature. This work experimentally compares the performance of an op-amp and an isolated voltage sensor-based ZCD circuits, considering their rise/fall latency and precision in detecting the zero-crossing points (ZCPs). The design process and the experimental results demonstrated that the op-amp-based ZCD circuit is susceptible to false and multiple detections of ZCPs and is best suited for relatively low-voltage applications. On the other hand, the voltage sensor-based ZCD circuit allows signal conditioning and is best suited for relatively high voltage applications.

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Section: Motivation and Backgroundmentioning

confidence: 99%

Section: Motivation and Backgroundmentioning

confidence: 99%

Experimental comparison of operational amplifier and voltage sensor-based zero-crossing detector circuits for power electronic converters

Al-Dori,

Vural

2023

Journal of Electrical Engineering

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“…In order to monitor power systems under complex working conditions, a new generation of infrastructure, namely, wide area monitoring systems (WAMS), has been increasingly deployed in modern power systems [3]. As a key part of the WAMS, the state estimation (SE) algorithm has been playing a vitally important role in raising situation awareness, facilitating real-time control and enhancing security assessment and protection [4]- [6].…”

Section: Introductionmentioning

confidence: 99%

Anomaly-Resistant Decentralized State Estimation Under Minimum Error Entropy With Fiducial Points for Wide-Area Power Systems

Qu,

Wang,

Shen

et al. 2024

IEEE/CAA J. Autom. Sinica

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This paper investigates the anomaly-resistant decentralized state estimation (SE) problem for a class of wide-area power systems which are divided into several non-overlapping areas connected through transmission lines. Two classes of measurements (i.e., local measurements and edge measurements) are obtained, respectively, from the individual area and the transmission lines. A decentralized state estimator, whose performance is resistant against measurement with anomalies, is designed based on the minimum error entropy with fiducial points (MEEF) criterion. Specifically, i) an augmented model, which incorporates the local prediction and local measurement, is developed by resorting to the unscented transformation approach and the statistical linearization approach; ii) using the augmented model, an MEEF-based cost function is designed that reflects the local prediction errors of the state and the measurement; and iii) the local estimate is first obtained by minimizing the MEEF-based cost function through a fixed-point iteration and then updated by using the edge measuring information. Finally, simulation experiments with three scenarios are carried out on the IEEE 14-bus system to illustrate the validity of the proposed anomaly-resistant decentralized SE scheme. Index Terms-Wide-area power systems, decentralized state estimation, minimum error entropy, unscented Kalman filter, measurements with anomalies.

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“…They are generally used for rapid hardware-in-the-loop prototyping, i.e., proof-of-concept developments. Thus, PMU solutions based on the BeagleBone Black platform are described in [27][28][29][30], while approaches based on the Rasberry-Pi platform are presented in [31][32][33][34]. It should be pointed out that BBB is superior over the Raspberry-Pi platform due to the presence of two programmable real-time (RT) units.…”

Section: Introductionmentioning

confidence: 99%

A Low-Cost Test Platform for Performance Analysis of Phasor Measurement Units

Kunac,

Petrović,

Despalatović

et al. 2024

Electronics

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In this paper, a customizable low-cost voltage waveform generator based on a real-time desktop PC and embedded data acquisition card synchronized with Coordinated Universal Time (UTC) is presented. A software approach to phase-locked loop synchronization with an external Global Positioning System (GPS) pulse signal is utilized to achieve a time uncertainty of ±1μs. This avoids expensive hardware modules for synchronization and timing purposes, which are commonly presented in literature. Besides the application for controlling the test platform, our own phasor data concentrator (PDC) application is running concurrently on the host PC. The latter is used for collecting and comparing the syncrophasor data from the test platform against the syncrophasor data measured by phasor measurement units (PMUs) under the test. The paper describes all procedures for generating reference test signals. Numerous case studies were performed, and experimental results for steady-state compliance as well as frequency ramp and phase modulation tests for dynamic compliance are presented in detail. All tests confirm that customizable test platform meets the requirements of IEEE/IEC standards. Compared to other calibrators, the cost as well as the specifications and point-by-point concept of data processing makes the described test platform suitable for performance analysis of PMU algorithms implemented on various development boards.

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Power System Frequency and Phasor Estimation for a Low-Cost Synchrophasor Device Using the Nonlinear Least-Square Method

Cited by 15 publications

References 32 publications

Experimental comparison of operational amplifier and voltage sensor-based zero-crossing detector circuits for power electronic converters

Experimental comparison of operational amplifier and voltage sensor-based zero-crossing detector circuits for power electronic converters

Anomaly-Resistant Decentralized State Estimation Under Minimum Error Entropy With Fiducial Points for Wide-Area Power Systems

A Low-Cost Test Platform for Performance Analysis of Phasor Measurement Units

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