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DC micro-grids is an advanced electric delivery infrastructure candidate for future Smart Grid. By interactively integrating a wide selection of renewable sources, energy storages as well as traditional utility grid within a local power network, DC micro-grids can achieve economical system operation, and bing local survivability to critical zones. As important supplement to conventional generation...
The continuous effort to improve efficiency, reduce particle, and greenhouse gase emissions leads to the emergence of the concept “more electric.” This concept helps to boost the performance as well as the flexibility of the domestic and vehicular applications; however, on the other hand, it excessively burdens current power networks (including vehicle power systems). In order to remedy this problem,...
This paper introduced the operation principle of current mode control boost converter. The equations of two different work states were built by applying the theory of KCL and KVL. Two models working in CCM and DCM were respectively established using Matlab/Simulink and the nonlinear phenomenon of boost converter can be observed through simulation. The results of theoretical analysis are corresponded...
Nonlinear phenomena are very prevalent in power electronic circuits. In this paper, rich nonlinear phenomena were studied in depth in power electronic circuit such as DC-DC converters, AC-DC converters, and DC-AC converters. It regarded voltage mode Buck converter, peak current mode Boost PFC, H bridge inverter as the object of study, elaborated the operation principle, listed in the corresponding...
The operation principle of peak current mode control H bridge converter was analyzed. It can observe nonlinear phenomena in H bridge converter after simulating to the model, which builds by the concept of binary logic variables using Matlab/Simulink. According to the characteristics of H bridge converter, a time-delayed feedback control method was applied to suppress the chaos behavior of H bridge...
Nanoscale system-on-chip (SoC) devices offer potential for higher performance and reduced power consumption at lower cost. However yield and reliability of mixed-signal components in such devices become serious issues due to process variability. In this paper, we discuss a novel variation-tolerant technique for non-linearity errors in self-correctable mixed-signal components. We propose a completely...
In order to accommodate increasing energy demand from "more electrified" domestic and vehicular applications, simultaneous use of various renewable sources are encouraged. Multiple converters are commonly adopted to process the renewable power as a distributed power system (DPS). However, due to the loose structure of DPS, reliability and load/source regulation will degrade as compared to...
Linearity measurements are significant for assessing the performance of a modern mixed-signal system-on-chip. In this paper a new built-in self-test (BIST) scheme is presented for testing and calibration of on-chip high-resolution digital-to-analog converters (DACs) and analog-to-digital converters (ADCs) for better linearity using sigma-delta modulator and low-resolution dithering DAC. Ramp signals...
Fuel cells are becoming more prevalent as the replacement for diesel/gasoline powered systems, such as vehicle and emergency power sources. However, cost and slow dynamic response of fuel cell still persist as the main disadvantage. To remedy this problem, an energy storage system with adequate power delivery has to be incorporated. This paper presents a low cost fuel cell-battery uninterruptible...
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