نتایج جستجو برای: phasor measurement unit pmu

تعداد نتایج: 805621  

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...

2012
G. B. Gharehpetian

Catastrophic failures in power grid due to maloperation of traditional backup protection system (e.g. third zone of distance relays) was one of the main causes of many cascade trips. This paper assess a new wide-area backup protection system (WABPS) based on phasor measurement units (PMU), to improve third zone of distance relays to avoid its mal-operation. Based on this assessment, phasor meas...

2005
TIAN-TIAN CAI QIAN AI

The analysis of power system observability and the rules of PMU placement are concisely presented. Several algorithms of PMU placement as well as their differences and relations are discussed in details: a graph-theoretic procedure based on Depth First Search can find the optimal placement the most quickly; Simulated Annealing Method can help the algorithm converge to global optimum. Base on th...

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...

2017
Arpit Khandelwal Akash Saxena Ankush Tandon

ue to the expansion of power systems there is a challenge of real time monitoring and control by placing important parameters at various points for efficient functioning of the power system. There can be drastic changes during hourly load fluctuations, component outages, or network switching. In such conditions, the inclusion of predicted values could degrade the power system state estimation h...

ژورنال: :هوش محاسباتی در مهندسی برق 0
مصطفی بگ محمدی رحمت الله هوشمند دانشگاه اصفهان فریبرز حقیقت دار فشارکی

افزایش روزافزون مصرف انرژی الکتریکی و مطرح شدن پدیده تجدید ساختار در شبکه­های قدرت و مشکلات حاصل از آن ها، باعث افزایش تمایل بهره­برداران شبکه­های قدرت به استفاده از wams (wide area measurement system) به جای scada (supervisory control and data acquisition) شده است. یکی از مباحث مهم در wams کاهش هزینه جایابی بهینه pmu (phasor measurement unit) و هزینه ساختار ارتباطی مربوط به آن ها است. در این م...

2013
Xin Tai Damián Marelli Eduardo Rohr Minyue Fu

Phasor measurement unit s (PMUs) provide globally synchronized measurements of voltage and current phasors in real-time and at a high sampling rate. Hence, they permit improving the state estimation performance in power systems. In this paper we propose a novel method for optimal PMU placement in a power system suffering from random component outages (RCOs). In the proposed method, for a given ...

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

Many operations in power grids, such as fault detection and event location estimation, depend on precise timing information. In this paper, a novel time stamp 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) for prec...

2006
Manu Parashar Jim Dyer Terry Bilke

The Eastern Interconnection Phasor Projects (EIPP) is a Department of Energy (DOE) and Consortium for Electric Reliability Technology Solutions (CERTS) initiative to deliver immediate value of phasor technology to the Eastern Interconnection (EI) participants. With the current EI phasor network comprising of approximately 25 Phasor Measurement Units (PMU) and 5 Phasor Data Concentrators (PDC) i...

افزایش روزافزون مصرف انرژی الکتریکی و مطرح‌شدن پدیده تجدید ساختار در شبکه­های قدرت و مشکلات حاصل از آن‌ها، باعث افزایش تمایل بهره­برداران شبکه­های قدرت به استفاده از WAMS (Wide Area Measurement System) به جای SCADA (Supervisory Control And Data Acquisition) شده است. یکی از مباحث مهم در WAMS کاهش هزینة جایابی بهینه PMU (Phasor Measurement Unit) و هزینه ساختار ارتباطی مربوط به آن‌ها است. در این م...

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