scholarly journals LAPS–LOWICE: A Real-Time System for the Assessment of Low-Level Icing Conditions and Their Effect on Wind Power

2015 ◽  
Vol 32 (8) ◽  
pp. 1447-1463
Author(s):  
E. Gregow ◽  
B. Bernstein ◽  
I. Wittmeyer ◽  
J. Hirvonen
Keyword(s):  
Real Time ◽  
Wind Power ◽  
Time History ◽  
Wind Farms ◽  
Local Analysis ◽  
Power Losses ◽  
Real Time System ◽  
Turbine Efficiency ◽  
Highly Sensitive ◽  
History Of

AbstractThe wind power industry is highly sensitive to weather, and there is a clear impact on turbine efficiency associated with icing, which can cause significant power losses and even result in the total shutdown of wind farms. Therefore, accurate analyses and forecasts of wind- and icing-related meteorological variables are of great importance. To this end, the Local Analysis and Prediction System (LAPS)–LOWICE system has been developed to produce real-time, hourly estimates of the presence, intensity, and impacts of icing on wind power production. As part of this development, it became clear that power losses did not correlate well with measured icing loads but correlated reasonably well with the time history of icing rate in combination with ice loss due to melting, sublimation, and shedding.

scholarly journals A Small Remark on Hilbert’s Finitist View of Divisibility and Kanovich-Okada-Scedrov’s Logical Analysis of Real-Time Systems

2020 ◽  
pp. 39-47
Author(s):  
Mitsuhiro Okada
Keyword(s):  
Real Time ◽  
Infinite Divisibility ◽  
Early History ◽  
Logical Analysis ◽  
Real Time Systems ◽  
Infinitely Divisible ◽  
Real Time System ◽  
Natural Event ◽  
History Of ◽  
Time Systems

Abstract Hilbert remarked in the introductory part of his most famous finitism address (1925  [1]) that “[t]he infinite divisibility of a continuum is an operation that is present only in our thought”, which means that no natural event or matter is infinitely divisible in reality. We recall that Scedrov’s group including the author started logical analysis of real time systems with the principle similar to Hilbert’s no-infinite divisibility claim, in  [2]. The author would like to note some early history of the group’s work on logical analysis of real time system as well as some remark related to Hilbert’s claim of no-infinite divisibility.

Wind Farms Real-Time Supervisory Information System Based on MapGuide

2010 ◽  
Vol 40-41 ◽  
pp. 404-409
Author(s):  
Bao Feng Zhang ◽  
Xiao Kun Chang
Keyword(s):  
Information System ◽  
Real Time ◽  
Wind Power ◽  
Wind Farms ◽  
Accurate Prediction ◽  
Short Term ◽  
System A

According to the requirements of wind farms real-time supervisory information system, a WebGIS with Browser/Server (B/S) architechture is developed based on MapGuide to implement wind farms supervisory information system. It has the functions such as map browse, roaming,.dynamic appending data, real-time display and so on, thus achieving 0-4 hours super-short-term accurate prediction of wind power.

scholarly journals Congestion Risk-Averse Stochastic Unit Commitment with Transmission Reserves in Wind-Thermal Power Systems

2018 ◽  
Vol 8 (10) ◽  
pp. 1726 ◽  
Author(s):  
Yu Huang ◽  
Qingshan Xu ◽  
Guang Lin
Keyword(s):  
Power Systems ◽  
Real Time ◽  
Wind Power ◽  
Unit Commitment ◽  
Thermal Power ◽  
Wind Farms ◽  
Cost Effective ◽  
Operational Reliability ◽  
Risk Averse ◽  
Stochastic Unit Commitment

The great proliferation of wind power generation has brought about great challenges to power system operations. To mitigate the ramifications of wind power uncertainty on operational reliability, predictive scheduling of generation and transmission resources is required in the day-ahead and real-time markets. In this regard, this paper presents a risk-averse stochastic unit commitment model that incorporates transmission reserves to flexibly manage uncertainty-induced congestion. In this two-settlement market framework, the key statistical features of line flows are extracted using a high-dimensional probabilistic collocation method in the real-time dispatch, for which the spatial correlation between wind farms is also considered. These features are then used to quantify transmission reserve requirements in the transmission constraints at the day-ahead stage. Comparative studies on the IEEE 57-bus system demonstrate that the proposed method outperforms the conventional unit commitment (UC) to enhance the system reliability with wind power integration while leading to more cost-effective operations.

scholarly journals EUV Sources and Transients Detected by the Alexis Satellite

1998 ◽  
Vol 179 ◽  
pp. 144-146
Author(s):  
D. Roussel-Dupré ◽  
T. Pfafman ◽  
J. Bloch ◽  
J. Theiler
Keyword(s):  
Real Time ◽  
Time History ◽  
Time Variability ◽  
Long Duration ◽  
History Of

Because ALEXIS is a spinning satellite, it is an ideal platform with which to study the time variability of the EUV cosmos. The main thrusts of this effort are to 1) detect EUV sources at known and unknown locations, 2) provide notification of transients in near real time to enable immediate follow-up from other observatories, and 3) create a time history of observed sources for comparison with previously published catalogs to aid in determining long duration variability from EUV sources.

Real-Time System for Sending Data from Three Clients to One Server with MATLAB

2015 ◽  
Vol 2 (1) ◽  
pp. 35-41
Author(s):  
Rivan Risdaryanto ◽  
Houtman P. Siregar ◽  
Dedy Loebis
Keyword(s):  
Information System ◽  
Real Time ◽  
Time System ◽  
Real Time System ◽  
The Real ◽  
Performance Time ◽  
Data Process ◽  
Effectiveness And Efficiency

The real-time system is now used on many fields, such as telecommunication, military, information system, evenmedical to get information quickly, on time and accurate. Needless to say, a real-time system will always considerthe performance time. In our application, we define the time target/deadline, so that the system should execute thewhole tasks under predefined deadline. However, if the system failed to finish the tasks, it will lead to fatal failure.In other words, if the system cannot be executed on time, it will affect the subsequent tasks. In this paper, wepropose a real-time system for sending data to find effectiveness and efficiency. Sending data process will beconstructed in MATLAB and sending data process has a time target as when data will send.

The Goal-Setting Model in a Multiagent Hard Real-Time System

Vestnik MEI ◽  
2018 ◽  
Vol 5 (5) ◽  
pp. 73-78
Author(s):  
Igor В. Fominykh ◽  
◽  
Sergey V. Romanchuk ◽  
Nikolay Р. Alekseev ◽  
◽  
...  
Keyword(s):  
Real Time ◽  
Goal Setting ◽  
Time System ◽  
Real Time System ◽  
Hard Real Time

PROGRAM OF PREDICTION AND MANAGEMENT OF COINTEGED DYNAMIC ECONOMIC PROCESSES BASED ON THE CYBERNETIC APPROACH

2019 ◽  
Author(s):  
Olena Bundak ◽  
Nataliia Zubovetska
Keyword(s):  
Computer Program ◽  
Pair Correlation ◽  
Time History ◽  
Critical Area ◽  
Concrete Object ◽  
Graphic Arts ◽  
Ex Post ◽  
History Of ◽  
Successive Change ◽  
Rms Errors

A method and computer program ConRow, which prognostication of development of the dynamically CPLD economic transients is executed by, is described in the article. Such prognostication of economic processes is very important in the cases when their development can result in undesirable consequences, that to go out in the so-called critical area. Extrapolation in a critical area with the use of information about the conduct of the system at an area, near to it, allows to estimate to the lead through of experiment in the critical area of his consequence. For the imitation of conduct of object the function of review is set on entrance influence. For a concrete object this function can express, for example, dependence of change of level sale from time-history of charges on advertising and set as a numeral row. Statistics as a result of analysis of row are represented in a table, where the level of meaningfulness is set statistician, and also parameters of the handed over criteria. The graphic reflection of information is intended for visualization of analysis. Here represented on the points of graphic arts, the crooked smoothing which are calculated as полиномиальные regressions is added. The best approaching is controlled by sight on the proper graph, and also by minimization of their rms errors. Models of prognostication by sight and as formulas represented on graphic arts, the middle is here determined tailings and their chance is checked up on statistics of signs. After the got models determined also and prognosis values of influences and reviews. Establishing an order models of Сr(p) of co integrate regression is carried out separate custom controls. The coefficient of clay correlation of ruФ shows by itself pair correlation between lines with a successive change in relation to each other on a size to лагу of l = 1, 2, 3 . The program was tested on the example of ex-post prognosis at establishing an integration connection and possibility of prognostication of growth of nominal average monthly settlings on the basis of these statistical indexes of consumer inflation in Ukraine.

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