Multiple robustness assessment method for understanding structural and functional characteristics of the power network

2018 ◽  
Vol 510 ◽  
pp. 261-270 ◽  
Author(s):  
Shuliang Wang ◽  
Jianhua Zhang ◽  
Xin Yue
Keyword(s):  
Assessment Method ◽  
Power Network ◽  
Functional Characteristics ◽  
Multiple Robustness ◽  
Robustness Assessment

scholarly journals Modeling and Simulation of the Anticipated Effects of the Synchronous Condenser on an Electric-Power Network with Participating Wind Plants

2018 ◽  
Vol 10 (12) ◽  
pp. 4834 ◽  
Author(s):  
Famous Igbinovia ◽  
Ghaeth Fandi ◽  
Ibrahim Ahmad ◽  
Zdenek Muller ◽  
Josef Tlusty
Keyword(s):  
Electric Power ◽  
Power Plants ◽  
Reactive Power ◽  
Short Circuit ◽  
Assessment Method ◽  
Active Power ◽  
Power Network ◽  
Electricity Grid ◽  
Systematic Assessment ◽  
Synchronous Condenser

Installing a synchronous condenser (SC) onto an electricity grid can assist in the areas of reactive power needs, short-circuit strength, and, consequently, system inertia and guarantees better dynamic voltage recovery. This paper summarizes the practical potential of the synchronous condenser coordinated in an electric-power network with participating wind plants to supply reactive power compensation and injection of active power at their point of common coupling; it provides a systematic assessment method for simulating and analyzing the anticipated effects of the synchronous condenser on a power network with participating wind plants. A 33-kV power line has been used as a case study. The results indicate that the effect of the adopted synchronous condenser solution model in the MATLAB/Simulink environment provides reactive power, enhances voltage stability, and minimizes power losses, while the wind power plants provide active power support with given practical grid rules.

Study on Time-Variant Robustness Assessment Method of Complex Bridges

2011 ◽  
Vol 250-253 ◽  
pp. 1962-1965
Author(s):  
Jin Song Zhu ◽  
Jian Song
Keyword(s):  
Assessment Method ◽  
Haihe River ◽  
Strength Factor ◽  
Finite Element Software ◽  
Structure Degradation ◽  
Degradation Rates ◽  
Close Relationship ◽  
Live Loads ◽  
Reserve Strength ◽  
Robustness Assessment

In order to accurately assess the robustness of the complex bridge structure, a method of robustness assessment that takes structure degradation and accidental loads into consideration is proposed. Firstly, the degradation rates of member section properties and the increasing rate of live load are set as variables. The parametrical model of structure is established by the finite element software of ANSYS. Secondly, the structure robustness is based upon analysis from the robustness index, the reserve strength factor and the residual strength factor. The effects of three degradation rates of section properties, the established increasing rate of live loads and accidental loads on the robustness of bridges are considered. Finally, this method is used to analyze the time-variant robustness of Guotai Bridge located on the Haihe River of Tianjin. The results indicate that different degradation rates of member section properties have different effect on the robustness of Guotai Bridge, the effect of accidental loads has a close relationship with its acting position.

Operation Betweenness Based Assessment on Overload Vulnerability

2013 ◽  
Vol 373-375 ◽  
pp. 1378-1383
Author(s):  
Tong Wang ◽  
Jing Ma
Keyword(s):  
Transmission Line ◽  
Network Theory ◽  
Physical Meaning ◽  
Topological Structure ◽  
Assessment Method ◽  
Electrical Network ◽  
Actual Condition ◽  
Power Network ◽  
Current Sharing ◽  
Simulation Results

An operation betweenness based method to assess overloaded lines is proposed. Based on electrical network theory, firstly the branch current sharing factors are deduced; then the operation betweenness of transmission line is defined; finally, on this basis the overload vulnerability of transmission line is assessed. In the proposed method, the impacts of both topological structure and operation modes of power network on vulnerability are considered for the assessment. The physical meaning of the proposed method is determinate and conforms to actual condition of power system, and this method avoids the defect in the complicated network model that the power flows only flow along the shortest path. The correctness of the proposed assessment method is verified by simulation results of IEEE 39-bus system.

Probabilistic assessment method of the non-monotonic dose-responses-Part II: Robustness assessment

2017 ◽  
Vol 110 ◽  
pp. 214-228 ◽  
Author(s):  
Grégoire Chevillotte ◽  
Audrey Bernard ◽  
Clémence Varret ◽  
Pascal Ballet ◽  
Laurent Bodin ◽  
...  
Keyword(s):  
Assessment Method ◽  
Probabilistic Assessment ◽  
Dose Responses ◽  
Robustness Assessment

Delir-Diagnostik

2007 ◽  
Vol 20 (2-3) ◽  
pp. 135-139
Author(s):  
B. Dittrich ◽  
G. Gatterer ◽  
T. Frühwald ◽  
U. Sommeregger
Keyword(s):  
Confusion Assessment Method ◽  
Assessment Method ◽  
Psychische Störung ◽  
Confusion Assessment

Zusammenfassung: Das Delir (“akuter Verwirrtheitszustand”) bezeichnet eine psychische Störung, die plötzlich auftritt, durch eine rasche Fluktuation von Bewusstseinslage und Aufmerksamkeitsleistung gekennzeichnet ist und eine organische Ursache hat. Dieses Störungsbild nimmt bei Patienten im höheren Lebensalter deutlich an Häufigkeit zu und verursacht durch verlängerte Krankenhausaufenthalte und ungünstige Krankheitsverläufe erhebliche Kosten im Gesundheitssystem. Daher erscheint eine möglichst frühe Erkennung deliranter Zustandsbilder gerade im Rahmen der Geriatrie von großer Bedeutung. Zu diesem Zweck wurde eine deutsche Version der international weit verbreiteten Confusion Assessment Method entwickelt, die für die Bedürfnisse einer Abteilung für Akutgeriatrie modifiziert wurde. Dargestellt werden die Entwicklung und erste Erfahrungen mit diesem Instrument.

The Need Inventory of Sensation Seeking (NISS)

2012 ◽  
Vol 28 (1) ◽  
pp. 11-18 ◽  
Author(s):  
Marcus Roth ◽  
Philipp Hammelstein
Keyword(s):  
Sensation Seeking ◽  
Reliability And Validity ◽  
Assessment Method ◽  
Factorial Structure ◽  
Conventional Methods ◽  
New Research ◽  
Sensation Seeking Scale ◽  
Temperamental Trait ◽  
Nonclinical Study

Based on the conception of sensation seeking as a need rather than a temperamental trait ( Hammelstein, 2004 ), we present a new assessment method, the Need Inventory of Sensation Seeking (NISS), which is considered to assess a motivational disposition. Three studies are presented: The first examined the factorial structure and the reliability of the German versions of the NISS; the second study compared the German and the English versions of the NISS; and finally, the validity of the NISS was examined in a nonclinical study and compared to the validity of conventional methods of assessing sensation seeking (Sensation Seeking Scale – Form V; SSS-V). Compared to the SSS-V, the NISS shows better reliability and validity in addition to providing new research possibilities including application in experimental areas.

An Empirical Analysis of the Obtrusiveness of and Participants' Compliance with the Electronically Activated Recorder (EAR)

2007 ◽  
Vol 23 (4) ◽  
pp. 248-257 ◽  
Author(s):  
Matthias R. Mehl ◽  
Shannon E. Holleran
Keyword(s):  
Empirical Analysis ◽  
Sampling Method ◽  
Daily Life ◽  
Assessment Method ◽  
Data Confidentiality ◽  
Short Term ◽  
Naturally Occurring ◽  
Two Samples ◽  
Audio Recorder ◽  
Term Monitoring

Abstract. In this article, the authors provide an empirical analysis of the obtrusiveness of and participants' compliance with a relatively new psychological ambulatory assessment method, called the electronically activated recorder or EAR. The EAR is a modified portable audio-recorder that periodically records snippets of ambient sounds from participants' daily environments. In tracking moment-to-moment ambient sounds, the EAR yields an acoustic log of a person's day as it unfolds. As a naturalistic observation sampling method, it provides an observer's account of daily life and is optimized for the assessment of audible aspects of participants' naturally-occurring social behaviors and interactions. Measures of self-reported and behaviorally-assessed EAR obtrusiveness and compliance were analyzed in two samples. After an initial 2-h period of relative obtrusiveness, participants habituated to wearing the EAR and perceived it as fairly unobtrusive both in a short-term (2 days, N = 96) and a longer-term (10-11 days, N = 11) monitoring. Compliance with the method was high both during the short-term and longer-term monitoring. Somewhat reduced compliance was identified over the weekend; this effect appears to be specific to student populations. Important privacy and data confidentiality considerations around the EAR method are discussed.

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