...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Power Electronics, IET >Dc-link current computational methods for three-phase inverter with low-order harmonic output current
【24h】

Dc-link current computational methods for three-phase inverter with low-order harmonic output current

机译：低阶谐波输出电流的三相逆变器直流环节电流计算方法

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Both the spectral analysis and the closed-form root-mean-square (RMS) equations are widely used to determine the three-phase inverter dc-link current for capacitor rating proposed. However, the analytical models of the dc-link currents have rarely been reported for applications like the active power filter, where ac currents are mostly low-order harmonics (LOHs). This paper first derived expressions for each dc-link LOH current, in order to compute the capacitor losses for each LOH frequencies. Then, it is shown that the derivation of the dc-link switching harmonic current (SHC) RMS equation is very much complicated when LOHs are present in the ac currents. Hence, new set of generalised RMS equations were successfully derived and simplified into one equation to facilitate the worst case design. The design case of the dc-link current is demonstrated with the proposed equations. A flexible grid-tied inverter lab prototype is developed to inject arbitrary combinations of LOH currents of different orders, sequences, amplitudes and angles into the grid. Good match between the computational and experimental results validates the proposed methods.
机译：频谱分析和闭合形式的均方根（RMS）方程均被广泛用于确定所建议的电容器额定值的三相逆变器直流环节电流。但是，很少有报道将直流链路电流的分析模型用于有源电力滤波器等应用，在这些应用中，交流电流主要是低阶谐波（LOH）。本文首先推导每个直流链路LOH电流的表达式，以便计算每个LOH频率的电容器损耗。然后表明，当交流电流中存在LOH时，直流母线开关谐波电流（SHC）RMS方程的推导非常复杂。因此，成功地导出了一组新的广义RMS方程并将其简化为一个方程，以方便最坏情况的设计。所提出的方程式演示了直流母线电流的设计实例。开发了一个灵活的并网逆变器实验室原型，可以将任意数量，顺序，幅度和角度的LOH电流的任意组合注入到电网中。计算结果和实验结果之间的良好匹配验证了所提出的方法。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号