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This paper proposes a comprehensive evaluation of stacked revenues generated from grid connected energy storage systems (ESSs). The stacked revenue from an ESS cannot be calculated by simply aggregating the benefits from each type of application (e.g., energy shifting, frequency regulation, and outage mitigation) due to the fact that the ESS may not be available for use for all types of applications...
ReRAM devices show potential for in memory computing systems due to their capability to both store and process data via implication logic. This type of logic, which is typically implemented using the set transition, could offer reliability and performance advantage if implemented with reset switching of the device. However, the gradual transition of the reset makes it impractical. This paper presents...
Gallium Nitride (GaN) based power devices have been demonstrated to deliver higher energy efficiency than their Silicon (Si) counterparts for 200–1.2kV rated applications. The benefits of GaN technologies and their market potential will be highlighted in this paper together with the main challenges that GaN-based power systems need to overcome to reach their full potential and finally enter the market...
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...
This paper presents the design, development, and evaluation of a high power, i.e., 1200-V/600-A, double-sided multichip phase-leg IGBT module with the purpose of increasing power density compared with conventional wire-bonded IGBT modules. Nanosilver paste is chosen as the die-attach material so as to increase the maximum application temperature by avoiding the creep failure at high temperatures compared...
A boost dc-dc dimmable AC-LED driver is presented in this paper based on Zero Current Switching Quasi-Resonant Converters (ZCS-QRCs). The proposed driver is based on replacing the diode in conventional converter topologies (i.e. buck, boost or buck-boost) by a string of High-Brightness Light-Emitting Diodes (HB-LED). Hence, the HB-LED string will be working as the rectifier of the converter switching...
This paper proposes a concept of two-terminal active capacitor implemented by power semiconductor switches and passive elements. The active capacitor has the same level of convenience as a passive one with two power terminals only. A control strategy that does not require any external feedback signal is proposed and a self-power scheme for gate drivers and the controller is applied to achieve the...
In this paper, Spread Spectrum Time Domain Reflectometry (SSTDR) has been implemented for the first time across the gate and the source of a power metal oxide semiconductor field effect transistor (MOSFET) to perform the online degradation monitoring of switching devices as well as the overall converter. To accomplish this, the SSTDR test signal is superimposed with the pulse width modulated (PWM)...
For Smart Transformers (ST), reliability is one of the major problems when compared to the traditional low-frequency transformers. Modular ST with advanced control algorithms could increase the reliability compared to the non-modular solutions. This could be achieved by distributing differently the power among the cells depending on their aging. This unequal power transfer is a challenge for Cascaded...
The challenge of failure management emerges in decentralized architectures due to the distributed nature of the layered control process. Failures in microgrid system may occur at the microgrid level or any of the control layers. A failure detection and response mechanism is required to attain a reliable, fault-tolerant microgrid operation. This paper introduces a Failure Management Unit as an essential...
Series-stacked server power delivery architectures have been proposed recently that can achieve much higher energy efficiency than conventional power delivery architectures. When servers are connected in series, differential power processing (DPP) converters can be used to regulate the server voltages when the servers are consuming different amount of currents. Server-to-bus DPP architecture has unique...
This paper presents a novel hybrid adaptive droop controller to simultaneously regulate both the AC-side and DC-side parameters for power electronic converters in single-phase Microgrids. The main contribution of this paper is to integrate the AC-side and DC-side controllers. Unlike previously presented control schemes, where the DC-bus is considered as an infinite bus or constant voltage bus, the...
With the progress of technology and widespread use of internet, the data has become digital. It is getting easier day by day to copy, modify and transform digital data / applications into another form. The term of digital rights management (DRM) has been suggested to limit the use of data in digital media and to protect copyrights. Different architectures / technologies are used to provide DRM. In...
Recently, a new concept called desktop cloud emerged, which was developed to offer cloud computing services on non-dedicated resources. Similarly to cloud computing, desktop clouds are based on virtualization, and like other computational systems, may experience faults at any time. As a consequence, reliability has become a concern for researchers. Fault-tolerance strategies focused on independent...
Predictive maintenance of electric motors is a topic of increasing importance in many industrial applications. The mining industry is not an exception; many electric motors operating in mining facilities are critical machines and their unexpected failures may imply significant losses and can be hazardous for the users. Due to these facts, an increasing research effort has been dedicated to investigate...
DC-link capacitor is one of the reliability-critical components in motor drive applications, which contributes to a considerable cost, size and failure. Its reliability performance depends on both inherent physical strength and external loading. The grid unbalances could alter the electro-thermal stresses of key components in a motor drive. Therefore, this paper investigates the impact of grid voltage...
Power cycling in semiconductor modules contributes to repetitive thermal-mechanical stresses, which in return accumulate as fatigue on the devices, and challenge the lifetime. Typically, lifetime models are expressed in number-of-cycles, within which the device can operate without failures under predefined conditions. In these lifetime models, thermal stresses (e.g., junction temperature variations)...
The application of droop control as the sole mechanism for power management in microgrids is limited due to its difficulty in achieving operational economy and regulation of frequency. Consequentially, these needs are usually managed using higher level communication-based distributed or centralised control layers. To address these issues, this paper introduces an alternative approach for power management...
A novel IGBT module construction using materials with matching coefficients of thermal expansion (CTEs) to provide longer lifetime and increased reliability will be presented. This technology reduces the stress on solder layers in the module, which tend to fatigue due to the module's flex during heat cycle tests. It will be shown that designs with matching CTEs also reduce the module's susceptibility...
Due to the continuous demands for highly reliable and cost-effective power conversion, the quantified reliability performances of the power electronics converter are becoming emerging needs. The existing reliability modelling approaches for the power electronics converter mainly focuses on the predictions of lifetime, accumulated damage, constant failure rate or Mean-Time-To-Failure (MTTF), while...
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