نتایج جستجو برای: واحد اندازهگیری فازور pmu

تعداد نتایج: 30933  

2015
R. A. DE CALLAFON C. H. WELLS

Event detection and analytic calculations in both Wide Area Measurement Systems (WAMS) and in distribution systems including Phasor Measurement Unit (PMU) based microgrid control systems often use the independent components of the phasors (e.g. frequency or Voltage) rather than the vector representation of a phasor. This paper introduces the use of the discrete time complex Fourier Transform ba...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سمنان - دانشکده برق و کامپیوتر 1391

پس از تجدید ساختار سیستم های قدرت، اپراتورها با نیازهایی برای مانیتور کردن و هماهنگ سازی قسمت های مختلف سیستم های قدرت که در فواصل دور اتفاق می افتد، مواجه شدند. اندازه گیری-های زمان واقعی برای این امر استفاده شدند، که این اندازه گیری ها با استفاده از تخمین حالت ممکن بود. تخمین حالت نقشی کلیدی در مانیتورینگ و کنترل سیستم های قدرت ایفا می کند، و می تواند داده ی زمان حقیقی را برای اپراتورها فراهم...

1999
Seigo Ogata Ichiro Kobayashi Yuji Hoshino

This paper introduces the efficient application of Virtual Reality (VR) technologies in the Architecture, Engineering and Construction (AEC) industry, where conventional plastic models are mainly used, which is called Physical Mock Up (PMU). An idea of Virtual Model (VM) is introduced in the paper. The VM consists of digital models added by digital information about the project, such as CAD dra...

2017
Chun-Chang Wu Wen-Yu Chuang Ching-Da Wu Yu-Cheng Su Yung-Yang Huang Yang-Jing Huang Sheng-Yu Peng Shih-An Yu Chih-Ting Lin Shey-Shi Lu

A self-sustained multi-sensor platform for indoor environmental monitoring is proposed in this paper. To reduce the cost and power consumption of the sensing platform, in the developed platform, organic materials of PEDOT:PSS and PEDOT:PSS/EB-PANI are used as the sensing films for humidity and CO₂ detection, respectively. Different from traditional gas sensors, these organic sensing films can o...

Journal: :International Transactions on Electrical Energy Systems 2022

This article presents a study on real-time testing of synchrophasor-based “wide-area monitoring system’s applications (WAMS application).” Considering the growing demand monitoring, protection, and control (WAMPAC)” applications, systematic methodology is formulated delineated in diagrams. The diagrams propose several stages through which an application needs to be assessed (sequentially) for i...

2012
Luoyang Fang Liuqing Yang

Frequency estimation is a crucial signal processing technique in Phasor Measurement Units (PMU). In this report, we propose a new algorithm for frequency estimation by interpolation of zero-padded discrete Fourier transform (DFT) samples. The bias performance of the proposed estimator is analyzed and an iterative algorithm is further proposed to reduce the bias to an arbitrarily small level. Si...

2014
Sideig A. Dowi Gengyin Li

This paper introduces the uses of Robust Dynamic State Estimation (RDSE) with Phasor Measurement Unit (PMU), The M-Estimators Quadratic Linear (QL) and Square Root (SR) Estimators have been used. For the solution of the M-estimators problem, Iteratively Re-weighted Least Squares Estimation (IRLS) method is applied. In this work, we used the Decoupled Current Measurement (DCM) method to include ...

2012
Zulkurnain Abdul-Malek Kamyar MehranZamir Behnam Salimi S. J. Mirazimi

Ferroresonance is a complex non-linear electrical phenomenon that can make thermal and dielectric problems to the electric power equipment. Ferroresonance causes overcurrents and overvoltages which is dangerous for electrical equipment. In this paper, ferroresonance investigation will be carried out for the 33kV/110V VT at PMU Kota Kemuning, Malaysia using ATP-EMTP simulation. Different precond...

2012
B. K. Saha Roy A. K. Sinha A. K. Pradhan

This paper presents a technique for real-time predictionof stability/instability of a power system based on synchrophasor measurements obtained from phasor measurement units (PMUs) at generator buses.For stability assessment the technique makes use of system severity indices developed usingbus voltage magnitudeobtained from PMUs and generator electrical power. Generator power is computed using ...

Journal: :CoRR 2012
Zhenghao Zhang Shuping Gong Aleksandar D. Dimitrovski Husheng Li

Many operations in power grids, such as fault detection and event location estimation, depend on precise timing information. In this paper, a novel Time Synchronization Attack (TSA) is proposed to attack the timing information in smart grid. Since many applications in smart grid utilize synchronous measurements and most of the measurement devices are equipped with global positioning system (GPS...

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