Quality and Reliability-Exploitation Modeling of Power Supply Systems

Abstract

This article describes the issues related to the analysis of the reliability-exploitation of power supply systems in transport telematics devices (PSSs in TTDs). This paper characterizes solutions, which are applied in supply systems, and describes a PSS in a TTD from a main source and a standby one. This enables determining the dependencies denoting the probabilities of the system staying in full ability state, safety threat state, and safety unreliability state. A quality analysis of the PSS in TTD was conducted, and the indicator value of the supply continuity quality was evaluated. This indicator allows the demonstration of continuity quality of power supply (CQoPS) dependency on many quality dimensions, not just reliability. An example demonstrates the calculation of CQoPS factor for both the main and the standby power supply, employing three observations, each influencing the quality. The presented considerations in the field of quality and reliability-exploitation modeling of a PSS can be applied as well in other public utility facilities (including those classified as critical infrastructure). The character of functions performed by critical infrastructure facilities demands an operating continuity of these systems at an appropriate level. The co-first authors of the article once again address the issue of determining CQoPS factor, this time on the basis of modeling using mathematical evidence. TTD is an example in this article, because the presented methods can be used in any kind of system, especially in the power source of critical systems.

Determining Information Quality in ICT Systems

“…In the following sections, in addition to the description of the method, an example of calculations for the selected model and the simulation of the model results depending on the input coefficients are also presented. A similar approach was presented by the main co-author in [7,[26][27][28][29]. Applying the presented approach to the assessment and analysis of other systems by assessing reliability or risk, as presented in the works [30][31][32], is also expected.…”

“…This value will be the IQ coefficient of the ICT system presented in the above example. As in the articles [17,29], below is presented a simulation of IQ depending on the positive observation e1ca (Figure 11) and negative e1cb (Figure 12). In order to obtain a visualization of IQ dependency change as a function of one of the IQ dimension features, a simulation was performed for the e1ca (observation with a positive influence on the IQ) value with a range between 0.05 and 0.99.…”

Optimization of the Delivery Time within the Distribution Network, Taking into Account Fuel Consumption and the Level of Carbon Dioxide Emissions into the Atmosphere

“…The type of route was determined in relations to (15). If the rounded quotient assumes a value close to 1.0, the analyzed route is defined as the base route.…”

“…The classic transport task is defined as the linear programming problem [1][2][3][4][5], which is the subject of a number of publications on new methods [6,7], algorithms [8], or on optimization techniques [9] of the existing decision node. Freight transport is often a decision problem in transport systems [10] affecting both the key performance indicators [11][12][13][14][15] and the level of customer service [16][17][18][19][20].…”

The Assessment of Energy Efficiency versus Planning of Rail Freight Traffic: A Case Study on the Example of Poland

“…One of them is to look for a solution with the highest possible energy efficiency. For the purpose of the article, energy efficiency will be understood as minimization of energy consumption [10] necessary to meet a transport need. Therefore, the assessment of energy efficiency will be made from the point of view of obtaining energy savings-fuel savings (electricity or diesel oil).…”