Analysis of UPS system reliability based on Monte Carlo approach

Abstract

The paper proposed an approach to quantitatively analysis the reliability of UPS (Uninterruptible Power Supply) system. Firstly, the reliability indices appropriate to UPS system were defined. Then, based on analysis of UPS system operation, the system fault tree and accurate multi-stages math models of modules were set up. The sequential Monte Carlo simulation method was used to calculate the system reliability indices and sensitivity of every module. Finally, a typical UPS system was given to demonstrate the proposed approach. The proposed means is useful in reliability evaluation and decision-making among different UPS system solutions

Flow-Network-Based Method for the Reliability Analysis of Decentralized Power System Topologies With a Sequential Monte-Carlo Simulation

“…They can, however, provide a variety of reliability indices and they are flexible enough to model systems with unique operation characteristics and dependencies. Examples of SMCS applied in a context of power system reliability include: analysis of emergency and standby power systems, such as UPSs [48], [49], microgrids with photovoltaic and wind generators [50], analyses of power plant layouts and power distribution systems for data centers [51], [52], or the reliability analysis of composite power systems with time-varying loads [53].…”

“…Moazzami et al [51] calculated the power flowing through two different busbar layouts via an ac optimal-power-flow algorithm, which requires parameters, such as bus voltages, generator impedances, transformer types, and line impedances. Gang et al [49] employed a fault tree of the analyzed system, which has to be obtained beforehand to verify the system state during simulation. Ghahderijani et al [50] checked if there is enough power from sources to power the load by simply summing the available power from sources and comparing it to the power demand, ignoring any components that might be placed between them.…”

The Structure Optimization Design of Cutting Disc of Defibrator Based on Monte Carlo Method

“…Optimization method of stochastic-direction search are detailed in the existing literature [8][9][10], using Monte Carlo method for random direction search, the search is characterized by high efficiency, short program, clear concept of geometry, both as a non-binding optimization methods can also be as constrained optimization methods, this article discusses the principle and made certain of diagram, with which to optimize the design of the disc of grinding machines Design a hot mill disc of softwood species processing pulp bleached sulfate, fiber average length are 2.3 ~ 3.8mm, average width are 39.8 ~ 47µm. Way for beating is medium fiber length semi-sticky, paste-like semi-free.…”

Study of Power System Protection Devices Based on Automation Open Hardware Platform

“…The most important requirement is that the grid stability. Therefore, in order to avoid damages generated on power facilities and ensure the maintenance of energy supply, the impact of the failure should be protected.A protective device is necessary to achieve grid protection [1,2]. The type of fault under normal operating conditions can be distinguished by measuring the voltage and current.…”