Operational reliability evaluation and prediction of rolling bearing based on isometric mapping and NoCuSa-LSSVM

A control method based on real-time operational reliability evaluation for space manipulator is presented for improving the success rate of a manipulator during the execution of a task. In this paper, a method for quantitative analysis of operational reliability is given when manipulator is executing a specified task; then a control model which could control the quantitative operational reliability is built. First, the control process is described by using a state space equation. Second, process parameters are estimated in real time using Bayesian method. Third, the expression of the system's real-time operational reliability is deduced based on the state space equation and process parameters which are estimated using Bayesian method. Finally, a control variable regulation strategy which considers the cost of control is given based on the Theory of Statistical Process Control. It is shown via simulations that this method effectively improves the operational reliability of space manipulator control system.

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Utilization of the Area Risk Concept for Operational Reliability Evaluation of a Wind-Integrated Power System

IEEE Transactions on Power Systems ◽

10.1109/tpwrs.2013.2264904 ◽

2013 ◽

Vol 28 (4) ◽

pp. 4771-4779 ◽

Cited By ~ 18

Author(s):

Suman Thapa ◽

Rajesh Karki ◽

Roy Billinton

Keyword(s):

Power System ◽

Reliability Evaluation ◽

Operational Reliability ◽

Integrated Power System ◽

Risk Concept

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Power system operational reliability evaluation based on real-time operating state

2005 International Power Engineering Conference ◽

10.1109/ipec.2005.207002 ◽

2005 ◽

Cited By ~ 11

Author(s):

Yuanzhang Sun ◽

Lin Cheng ◽

Haitao Liu ◽

Shan He

Keyword(s):

Power System ◽

Real Time ◽

Reliability Evaluation ◽

Operational Reliability

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Operational reliability evaluation of PV inverter considering relative humidity and its application on power system

E3S Web of Conferences ◽

10.1051/e3sconf/202018501050 ◽

2020 ◽

Vol 185 ◽

pp. 01050

Author(s):

Yangyang Tan ◽

Jun Liu ◽

Sichang Xu ◽

Peng Zhong ◽

Qi Zhang ◽

...

Keyword(s):

Relative Humidity ◽

Power Systems ◽

Power System ◽

Power Electronics ◽

Reliability Evaluation ◽

Operational Reliability ◽

Test System ◽

Growing Up ◽

Pv Systems ◽

Pv Inverter

With the penetration of renewable energy in the power system gradually increases, the importance of power electronics is growing up. The reliability of the power electronics should be taken seriously. This paper focuses on the operational reliability of photovoltaic (PV) inverters which is the most vulnerable in grid-connected PV systems and its application on the reliability evaluation of power systems. According to the field data, the effect of relative humidity is nonnegligible to the reliability of PV inverters. First, the real-time failure rate of components in PV inverters calculation method considering relative humidity is presented. Then the operational reliability evaluation of PV inverters is proposed. Finally, the reliability of power system including grid-connected PV systems is evaluated. It is aimed to explore a bottom-up approach to "effect factors-components-devices-system" reliability evaluation to establish a link between the components/devices and system. In this paper, the numerical examples verify the necessary of considering relative humidity in reliability evaluation. The evaluation results of PV inverters are used to the Roy Billinton Test System (RBTS). The analysis shows the results may affect the overall system performance.

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