Analysis and design of buck-boost converter for power quality improvement in high frequency on/off-line UPS system

2014 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES) Pub Date : 2014-12-01 DOI:10.1109/PEDES.2014.7042008

M. Junaid, Bhim Singh

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引用次数: 9

Abstract

This paper presents cascaded buck-boost converter for improving power quality at ac mains input in terms of improved power-factor (PF), reduced total harmonics distortion (THD) of input current and regulated output dc voltage at 380 V for high frequency uninterruptible power supply (HF-UPS). Discontinuous conduction mode (DCM) of operation is used to achieve inherent power factor correction (PFC) and to evade from the complexity in feedback control loop. The proposed configuration is able to operate under varying input voltages operation and withstand severe fault conditions like "Double Phase in Single Phase Utility (through neutral wire)". A comparative analysis is carried out to avail the benefits of proposed configuration over (a) single switch boost "Improved Power Quality converter (IPQC)" and (b) single switch buck-boost IPQC Converter. The performance of proposed power supply is evaluated in MATLAB/Simulink environment under wide variations in input voltages (85V-300V) and loads.

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用于提高高频UPS系统电能质量的降压-升压变换器的分析与设计

本文提出了一种用于高频不间断电源(HF-UPS)的级联降压-升压变换器，从提高功率因数(PF)、降低输入电流的总谐波失真(THD)和将输出直流电压调节到380 V等方面改善交流市电输入电能质量。工作时采用断续导通模式(DCM)来实现固有功率因数校正(PFC)和避免反馈控制回路的复杂性。建议的配置能够在不同的输入电压下运行，并承受严重的故障条件，如“单相双相公用事业(通过中性线)”。进行了比较分析，以利用所提出的配置优于(A)单开关升压“改进电能质量转换器(IPQC)”和(b)单开关降压-升压IPQC转换器。在MATLAB/Simulink环境中，对该电源在85V-300V的输入电压和负载变化情况下的性能进行了评估。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2014 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)

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