Reliability Modeling and Availability Simulating Based on GSPN Considering Hardware, Software and Human Factors

Aiming at the functional and structural characteristics of helicopter power transmission systems, this paper researches on the dynamic reliability modeling and simulating methods of complex mechanical systems. The hardware reliability, the human reliability and the software reliability related to helicopter power transmission systems are analyzed in this paper from the view point of systems engineering; the General Stochastic Petri Nets (GSPN) reliability models are established and the availability is simulated. According to the logistic connection among the attributions of the systems availability, two conceptions are presented: degree of facilitation and a new availability calculation model. Results show that the calculational value is very close to the simulating value. The new model based on facilitation is proved to be correct. The paper contributes to provide an effective reliability analyzing method and theoretical basis for complex mechanical system.

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Reliability modeling and evaluation of HVDC power transmission systems

IEEE Transactions on Power Delivery ◽

10.1109/61.296269 ◽

1994 ◽

Vol 9 (2) ◽

pp. 872-878 ◽

Cited By ~ 22

Author(s):

E.N. Dialynas ◽

N.C. Koskolos

Keyword(s):

Power Transmission ◽

Transmission Systems ◽

Reliability Modeling ◽

Power Transmission Systems

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A Novel Index for Detecting Line Stability Based on the Structural Characteristics of Power Transmission Systems

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.d1464.029420 ◽

2020 ◽

Vol 9 (4) ◽

pp. 3292-3297

Keyword(s):

Power Quality ◽

Power Transmission ◽

Structural Characteristics ◽

Flow Analysis ◽

Stability Index ◽

Load Flow ◽

Voltage Collapse ◽

Transmission Systems ◽

Characteristics Method ◽

Power Transmission Systems

In general, there is a large mismatch between power generation and power demand. Hence to ensure the power quality of power transmission systems has become a challenging task. One major issue in power quality is voltage collapse, which can cause system blackout if not detected in time. There are many measures to detect voltage collapse, among which identification of weak buses and weak lines plays a major role. Weak buses are identified using the Structural Characteristics Method (SCM). A novel stability index based on network structural characteristics is proposed for the identification of weak lines that can cause voltage collapse. This Electrical Distance Stability Index (EDSI) is determined on the basis of the electrical distance between various buses with that of weak buses determined by a structural characteristics method. The major significance of SCM and EDSI is the determination of weak buses and weak lines respectively without the need for load flow analysis unlike the existing methods. The proposed index is implemented on IEEE 6, 14 and 30 bus systems. The results thus obtained by the EDSI are identical and effective when compared with the results of existing line stability indices.

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