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首页> 外文会议>IEEE International Conference on Power Electronics, Drives and Energy Systems >Diode bridge rectifier with improved power quality using capacitive network
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Diode bridge rectifier with improved power quality using capacitive network

机译：使用电容网络改善电能质量的二极管桥式整流器

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摘要

Widely distributed single-phase power electronic rectifier loads are increasing source of harmonics in power distribution system. These harmonics have many well known adverse impacts on the power system. So it is necessary to improve the power quality of the rectifiers. This paper presents a novel single phase rectifier in which capacitors are used in parallel with diodes in one leg of the rectifier. A general analytical model of the proposed topology is obtained. The closed form expressions for the rectifier waveforms helps in parameter selection that leads to optimal performance in terms of input current THD. A comparative study of different topologies of rectifiers are done in terms of input voltage, current waveform distortion, output dc voltage ripple, and desired target for dc output voltage. The proposed topology reduces the total harmonic distortion from 145 percent in normal rectifier to 63 percent while maintaining voltage ripple less then 0.3 percent. The proposed topology keeps dc bus ripple small while simultaneously providing better THD. The passive components considered for improving harmonic injection are 2 small capacitors. The additional cost required for the proposed rectifier is low, the proposed rectifier also has a higher efficiency than the other commonly used topologies.
机译：广泛分布的单相电力电子整流器负载正在配电系统中增加谐波源。这些谐波会对电源系统产生许多众所周知的不利影响。因此有必要提高整流器的电能质量。本文提出了一种新颖的单相整流器，其中在整流器的一个分支中将电容器与二极管并联使用。获得了所提出拓扑的一般分析模型。整流器波形的闭合形式表达式有助于进行参数选择，从而在输入电流THD方面实现最佳性能。根据输入电压，电流波形失真，输出直流电压纹波和直流输出电压的期望目标，对整流器的不同拓扑进行了比较研究。拟议的拓扑将总谐波失真从常规整流器的145％降低到63％，同时将电压纹波保持在0.3％以下。拟议的拓扑结构可保持直流总线纹波较小，同时提供更好的总谐波失真。为改善谐波注入而考虑的无源元件是2个小型电容器。所提出的整流器所需的额外成本较低，所提出的整流器也具有比其他常用拓扑更高的效率。

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