Analysis and Design of Full-Bridge Converter with a Simple Passive Auxiliary Circuit Achieving Adaptive Peak Current for ZVS and Low Circulating Current

Grounding system analysis and design considerations for large hydroelectric power plant are analyzed and discussed in this paper. The main work that has been carried out includes: constructing adequate soil structures and analyzing the effects of the finite heterogeneous soil structure, the modeled river length and the water reservoir levels; conducting accurate fault current distribution calculations and studying the influence of circulating current on the touch and step voltages. The paper discusses the design of the grounding system and its safety performance while considering the impact of the circulating current and inductive coupling from cables and long parallel conductors inside the plant. Two practical examples have been provided in this paper. Furthermore, the paper demonstrates the effectiveness of using heterogeneous finite soil volumes to analyze large hydroelectric power stations and confirms that accurate grounding software packages are required to account for large circulating currents within the ground conductors and strong inductive coupling that exists between metallic elements within the substation. The results and discussions presented here can be used as a reference for engineers to analyze extensive grounding systems and to design appropriate grounding systems for large hydroelectric power plant.

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Analysis and design of internal compensation for peak-current-mode converter

2013 Fourth International Conference on Intelligent Control and Information Processing (ICICIP) ◽

10.1109/icicip.2013.6568103 ◽

2013 ◽

Cited By ~ 1

Author(s):

Suping Huang ◽

Quanyuan Feng

Keyword(s):

Current Mode ◽

Mode Converter ◽

Peak Current ◽

Analysis And Design

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Analysis and design of parallel-connected peak-current-mode-controlled switching DC∕DC power supplies

IEE Proceedings - Electric Power Applications ◽

10.1049/ip-epa:20040427 ◽

2004 ◽

Vol 151 (4) ◽

pp. 434 ◽

Cited By ~ 5

Author(s):

J.J. Shieh

Keyword(s):

Current Mode ◽

Power Supplies ◽

Peak Current ◽

Analysis And Design ◽

Controlled Switching ◽

Dc Power

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Analysis and design of LCS resonant cell based enhanced zero-voltage transition DC-DC boosting converter

Serbian Journal of Electrical Engineering ◽

10.2298/sjee1901105n ◽

2019 ◽

Vol 16 (1) ◽

pp. 105-121

Author(s):

Anandh Nagarajan ◽

Sekaran Fusic

Keyword(s):

Dynamic Performance ◽

Salient Feature ◽

Peak Current ◽

Current Stress ◽

Load Variations ◽

Analysis And Design ◽

Switching Performance ◽

Source Current ◽

Zero Voltage ◽

Load Conditions

An enhanced zero-voltage transition boosting converter (EZVTBC) is introduced here which belongs to higher-order family. It exhibits lower source current and load voltage ripples and also it maintains better voltage gain with respect to traditional step-up converter. The zero-voltage transition is attained with an aid of a LCS resonant cell integrating Lr - Cr resonance tank network along with an extra switch. LCS resonant cell is the modified version of conventional ZVT switch cell and the salient feature of this cell is to eliminate peak current stress and conduction losses of main switch as this remains a predominant problem in hard-switched boost converter and it also improves efficiency. Initially, time domain expressions of EZVTBC are derived using Kirchhoff?s laws for different operational stages to predict the resonant transition phenomenon. The simulation is progressed in PSIM software in order to verify its soft-switching performance on a 12 - 24 V, 30 W converter and also dynamic performance of the converter has been studied with line and load variations. It is found that for rated load conditions, efficiency of the soft-switched converter is improved 5 to 10% approximately and resulted in 97%. Moreover the peak current stress and conduction losses were eliminated.

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