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A 3 x 3 wear debris sensor array for real time lubricant oil conditioning monitoring using synchronized sampling

MECHANICAL SYSTEMS AND SIGNAL PROCESSING 2017年 83卷 296-304页

作者： Zhu, Xiaoliang Du, Li Zhe, Jiang Univ Akron Dept Mech Engn Akron OH 44325 USA

A high throughput wear debris sensor consisting of 3 x 3 sensing channels is presented for real time online lubricant oil conditioning monitoring. Time division multiplexing was applied to the sensing channels for measuring responses of multiple channels using one set of measurement electronics. Crosstalk among the 3 x 3 sensing channels was eliminated by diodes that are connected in series with each channel. Parallel L-C-R resonance was also applied to each sensing coil to increase the sensitivity. Furthermore, a unique synchronized sampling method was used to reduce the date size 50 times. Finally, we demonstrated that the sensor is capable of real time detection of wear debris as small as 50 gm in SAE OW-5 at a flow rate of 460 ml/min;the measured debris concentration is in good agreement with the estimated actual concentration. The design can be extended to a N x N sensor array for an extremely high throughput without sacrificing the sensitivity, and can potentially be used for real time wear debris monitoring for health condition of rotating or reciprocating machineries. (C) 2016 Elsevier Ltd. All rights reserved.

关键词： Oil condition monitoring Wear debris Inductive sensor Crosstalk synchronized sampling Time division multiplexing

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Pulsar-Calibrated Timing Source for synchronized sampling

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IEEE TRANSACTIONS ON SMART GRID 2022年第2期13卷 1654-1657页

作者： Qiu, Wei Yin, He Zhang, Liang Luo, Xiqian Yao, Wenxuan Zhu, Lin Liu, Yilu Univ Tennessee Dept Elect Engn & Comp Sci Knoxville TN 37996 USA Hunan Univ Coll Elect & Informat Engn Changsha 410082 Peoples R China Oak Ridge Natl Lab Oak Ridge TN 37831 USA

The Global Positioning System (GPS) is critical to the real-time synchronized sampling of phasor measurement units (PMUs). Unfortunately, GPS signals are occasionally unstable due to several factors such as weak satellite signal and GPS spoofing, thereby leaving the PMU with a degraded sampling performance. In this letter, a novel Pulsar-calibrated Timing Source (PTS) is proposed as the alternative timing source for synchronized sampling. The PTS can generate the timing signal with a 1 mu s drift error within 91 holdover minutes to ensure continuity of sampling accuracy. Experimental tests are conducted and the results reveal the reliability and accuracy of the PTS for PMU synchronization.

关键词： Timing Global Positioning System Synchronization Phasor measurement units Oscillators Frequency estimation Real-time systems Phasor measurement units pulsar-calibrated timing source synchronized sampling

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AN ACCURATE FAULT LOCATION ALGORITHM USING synchronized sampling

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ELECTRIC POWER SYSTEMS RESEARCH 1994年第3期29卷 161-169页

作者： KEZUNOVIC, M MRKIC, J PERUNICIC, B Texas A&M University College Station TX 77843 USA Lamar University Beaumont TX 77710 USA

This paper introduces new fault location algorithms based on synchronized sampling. A time domain model of a transmission line is used as a basis for the algorithm development. Samples of voltages and currents at the ends of a transmission line are taken synchronously and used to calculate fault location. The paper discusses two different algorithm forms utilizing two line models. A number of tests are performed using EMTP simulations of faults. The algorithm results show high accuracy while the computational burden is moderate.

关键词： FAULT LOCATION TIME DOMAIN MODELS synchronized sampling EMTP SIMULATIONS

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Automated transmission line fault analysis using synchronized sampling at two ends

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IEEE TRANSACTIONS ON POWER SYSTEMS 1996年第1期11卷 441-447页

作者： Kezunovic, M Perunicie, B LAMAR UNIV BEAUMONTTX 77710

This paper introduces a new approach to fault analysis using synchronized sampling. A digital fault recorder with Global Positioning System (GPS) satellite receiver is the source of data for this approach. Fault analysis functions, such as fault detection, classification and location are implemented for a transmission line using synchronized samples from two ends of a line. This technique can be extremely fast, selective and accurate, providing fault analysis performance that can not easily be matched by other known techniques.

关键词： fault analysis fault detection fault classification fault location synchronized sampling

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A Quantitative Error Analysis of synchronized sampling on Wireless Sensor Networks for Earthquake Monitoring 08

A Quantitative Error Analysis of Synchronized Sampling on Wi...

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6th ACM Conference on Embedded Networked Sensor Systems

作者： Suzuki, Makoto Saruwatari, Shunsuke Kurata, Narito Minami, Masateru Morikawa, Hiroyuki Univ Tokyo Grad Sch Frontier Sci Tokyo 1138654 Japan

No abstract available.

ISBN: (纸本)9781595939906

No abstract available.

关键词： Wireless Sensor Networks synchronized sampling Error Analysis Earthquake Monitoring

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Automated transmission line fault analysis using synchronized sampling at two ends

Automated transmission line fault analysis using synchronize...

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1995 IEEE Power Industry Computer Application Conference (PICA 95)

作者： Kezunovic, M Perunicie, B LAMAR UNIV BEAUMONTTX 77710

ISBN: (纸本)0780326644

关键词： fault analysis fault detection fault classification fault location synchronized sampling

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Phasor measurement method based on soft synchronized sampling with temporal pulse signal reference

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FRONTIERS IN ENERGY RESEARCH 2023年 11卷

作者： Zhang, Jie Tang, Chao Liu, Chun Wang, Hai Duan, Junfeng Tang, Sihao State Grid Sichuan Elect Power Co Elect Power Sci Res Inst Chengdu 610071 Peoples R China Sichuan Prov Key Lab Power Internet Things Chengdu Peoples R China State Grid Sichuan Elect Power Co Leshan Power Supply Co Leshan Peoples R China Hunan Univ Coll Elect & Informat Engn Changsha Peoples R China

Introduction: Phasor measurement is crucial for the monitoring and management of power grids. Traditional hardware-based phasor measurement units (PMUs) are effective but often complex and expensive. This paper introduces a software-based phasor measurement method that utilizes soft synchronization with temporal pulse signals from GPS and mobile communication stations, offering a simpler and cost-effective ***: The proposed method synchronizes the local oscillator with Pulse Per Second (PPS) signals from GPS and primary synchronization signals from mobile communication bases. Raw data affected by the local oscillator's instability are transformed into calibrated data using B-Spline interpolation to emulate an ideal sampling rate. The calibrated data are then subjected to a Recursive Discrete Fourier Transform (RDFT) algorithm for synchronized phasor ***: The method's performance was assessed in compliance with the C37.118.1 standard. Key performance indicators, such as frequency, phase, and Total Vector Error (TVE), were evaluated. The proposed software-based approach demonstrated high accuracy in synchronized phasor ***: The results confirm that the proposed method can serve as a highly accurate and simpler alternative to conventional hardware-based solutions. Its application promises to advance synchronized phasor measurement practices in power grid monitoring, enhancing reliability and reducing complexity and costs.

关键词： B-spline interpolation synchronized sampling synchrophasor estimation temporal pulse sampling time error

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COMPLETE FAULT ANALYSIS FOR LONG TRANSMISSION LINE USING synchronized sampling

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IFAC Proceedings Volumes 2006年第7期39卷 137-142页

作者： Nan Zhang Mladen Kezunovic Texas A&M University Department of Electrical and Computer Engineering College Station TX 77843-3128 U.S.A.

A complete fault analysis scheme for long transmission line represented with distributed parameters is proposed in this paper. The synchronized samples from both ends of the transmission line are the data sources for this scheme. The paper derives a specific feature which equals to zero for normal situation and external faults, and is close to fault current during the internal faults. This feature is used for fault detection and classification. Fault location is then implemented by selecting different methods according to the classified fault type. The results from a comprehensive evaluation study demonstrate an excellent performance of entire fault analysis.

关键词： fault analysis fault detection fault classification fault location synchronized sampling

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Enhancement of synchronized Power Grid sampling Utilizing Diophantine Approximation-Based Interpolation Filter Bank

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IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 2024年第9期71卷 11612-11621页

作者： Tang, Sihao Zhang, Leipeng Qiu, Wei Zheng, Yao Yao, Wenxuan Hunan Univ Coll Elect & Informat Engn Changsha 410082 Peoples R China

Accurate synchronized sampling is essential for power grid monitoring instruments, but its precision is greatly affected by sampling time errors (STEs) resulting from oscillator frequency drift. However, existing methods to mitigate STEs often rely on additional auxiliary devices or involve complex hardware control processes. Therefore, this article introduces a novel sampling scheme that effectively mitigates the impact of STEs without the aforementioned restrictions. First, the actual sampling interval is estimated via a counter triggered by the satellite timing reference. Second, the actual sampling interval is fed into the Diophantine approximation method to determine the sampling interval conversion ratio (SICR). Finally, an IFB is constructed according to the SICR to rectify the sampling data contaminated by the STE. A series of simulation and hardware experiments are conducted to verify the effectiveness of the proposed DA-IFB. The test results demonstrate that the proposed DA-IFB is comparable to the state-of-the-art synchronized sampling method without any additional requirements, with maximum sampling error significantly mitigating from 2.16 x 10(-3) to 10(-5 )V .

关键词： Diophantine approximation (DA) interpolation filter bank (IFB) phasor measurement sampling interval control synchronized sampling

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Variable-sample-rate delayless frequency-adaptive digital filter for synchronized signal acquisition and sampling

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IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 1999年第5期46卷 889-896页

作者： Dawson, FP Klaffke, L Univ Toronto Dept Elect & Comp Engn Toronto ON M5S 3G4 Canada Tech Univ Hamburg Harburg Dept Elect Power Syst & Automat D-21129 Hamburg Germany

In this paper, a hardware-based variable-sample-rate delayless frequency-adaptive cascaded digital filter is proposed. The open-loop frequency-adaptive and delayless property of a cascaded filter consisting of a median filter of length 3, a Blackman bandpass filter of length 30, and a predictive filter of length 25 is experimentally verified. Simulation results illustrating the filter's output response to input disturbances, in a synchronization signal acquisition application, are also presented.

关键词： bandpass filtering median filter predictive filter synchronized sampling variable sample rate

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