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Reliability testing has become extremely important in modern electronics as the soft error rate has been increasing due to technology scaling. The testing must be controllable, generic, done before deployment, cheap, and fast. Even though fault injection is often the most appropriate solution considering these requirements, it is very time-consuming. This work proposes a hybrid fault injection framework...
Failure location and mechanism analysis about a microsystem fault is presented in this work. The fault phenomenon of abnormal low output power amplitude appears only at low temperature during thermal cycle test. A series of analysis including internal fault location and replacing parts for validation help to find the fault origin: a line winding inductor. The failure mechanism of the failed inductor...
Battery energy storage system based on modular multilevel converter (MMC-BESS) has many advantages such as easy expansibility and high reliability. With multiple submodules (SM), the corresponding SM fault ride-through method is mandatory to reduce the construction redundancy and improve the operational reliability. This paper proposes a redistributed pulse width modulation (R-PWM) method for MMC-BESS...
Recently, fault indicators with communication function have been increasingly used in fault diagnosis of distribution networks. In this paper, an objective function which considers the reliability index of the distribution network and economic factors synthetically has been proposed for optimal placement of fault indicators in distribution networks, and binary particle swarm optimization algorithm...
DC-DC converters face an exponential growth in the context of the ever-increasing use of DC grids, namely at the home and business levels. In this domain, efficiency and reliability are of major concern. Solutions already available in the literature concerning fault-tolerant DC-DC converters do not consider the application of such converters in household environments and their constraints. To solve...
Condition monitoring and fault diagnosis are considered key features in order to increase the reliability and availability levels of wind turbine systems. Accordingly, this paper proposes a single fault diagnostic algorithm for multiple IGBTs open-circuit faults and current sensor faults in direct-driven wind turbines, based on permanent magnet synchronous generators with full-scale back-to-back converters...
In order to elevate equipment-oriented traditional asset management to system-oriented advanced asset management (AAM) decision-making for smart power grid, for the problem that influence of different positions of the equipment in network topology on system reliability is not taken into consideration in retiring strategies of transformer LCC (life cycle cost), which may cause overestimation or underestimation...
The article describes a method for recognizing the type of a fault from the analysis of gases dissolved in oil. In order to take into account the drift of the values of the coordinates of the graphic images, it is suggested to use not reference images, but reference areas that are built according to the results of DGA, equipment with the same type of defect. Standard areas for 56 faults were constructed,...
In this paper, the concept of P-Z-N distributed bipolar DC system is proposed in differentiation with existing PN distributed bipolar DC system. Such configuration enables each pole with independent operation capability and shows higher system reliability. Operation of P-Z-N distributed bipolar system involves coordination of PZ sub-microgrid and ZN sub-microgrid. In comparison with voltage balancer...
Hybrid AC-DC systems are expected to flourish rapidly as part of the transition from conventional grid to smart grid. Effective detection, classification, and mitigation of faults in hybrid systems require accurate modelling of the entire system as a whole, and its components as well. Moreover, precise computation of fault current is an indispensable part of any fault management scheme. Such modelling...
Recently introduced Bi-directional Z-Source breakers [1] are capable of clearing the short circuit fault within a few microseconds. In this paper, various applications and protection requirements for Bidirectional Z-Source breakers are discussed. Detailed comparison between de-rated AC breakers and Z-Source breakers is discussed. Breaker design criteria are explained with the help of simulation results...
In this paper, a multi-degree open-circuit faults diagnostic algorithm, for improving condition monitoring ability of spacecraft solar cell system, has been proposed. This algorithm combines the output parameter, output voltage, output current and the impedance of solar cell system under low frequency domain. The algorithm can be used to diagnose the degree of faults quantitively and quickly. The...
This work proposes a fault diagnosis methodology intended for resistive memories. Multiple cells of a block may suffer from stuck-at faults during repetitive write operations in resistive memory. It causes serious hindrance to large scale adoption of resistive memory. This issue is addressed through introduction of von Neumann's Cellular Automata (CA). The two single length cycle attractor CA (TACA)...
This work aims at the study and analysis of the influence of coordination and selectivity of protection devices on the reliability of electricity distribution networks. A methodology will be present for the implementation of a computational system that has as main points the integrated analysis of short circuits, coordination and selectivity of protection devices and calculations of reliability indicators...
Hardware implementations of Object-Tracking Algorithms, like most integrated circuits, are susceptible to radiation-induced soft errors. This work evaluated the reliability of a field-programmable gate array (FPGA) prototype for object-tracking algorithms via fault emulation experiments conducted at the register-transfer level (RTL). Faults were injected into the main sub-modules within the object-tracking...
Dependability models are focused only on the basic stuck-at faults. In previous work a method has been shown on how to calculate dependability prediction using Markov chain models. This method has been described using the TMR architecture. In this paper a similar method for calculating the dependability parameter lambda (i.e., the failure rate of the system) is proposed. Focus is given on the dependability...
In terms of power supplies and power conversion, power electronics based converters have their own advantages. Proper condition monitoring for power electronic converter has become necessary which is now in incipient stage. This paper includes different kinds of failure modes associated with power electronics at the converter as well as device level and recent Condition Monitoring (CM) techniques...
As the security is becoming more and more important these days, we still should not forget about reliability. When designing a cryptographic device for some mission-critical or another reliability demanding system, we need to make the device not only attack-resistant, but also fault-tolerant. There are many common fault-tolerant digital design techniques, however, it is questionable, how these techniques...
The use of electronic equipment and other DC-compatible appliances in dwellings and offices is increasing at a very fast rate, as well as the distributed generation of energy. These two statements will certainly trigger, in a near future, the adoption of district-scale DC grids, connecting DC micro-generation plants and consumers, in an effort to cut the number of conversion steps required to deliver...
SRAM-Based FPGAs represent a low-cost alternative to ASIC device thanks to their high performance and design flexibility. In particular, for aerospace and avionics application fields, SRAM-based FPGAs are increasingly adopted for their configurability features making them a viable solution for long-time applications. However, these fields are characterized by a radiation environment that makes the...
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