...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Electric power systems research >Assessment of the harmonic currents generated by single-phase nonlinear loads
【24h】

Assessment of the harmonic currents generated by single-phase nonlinear loads

机译：评估单相非线性负载产生的谐波电流

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

The problem of computing the harmonic currents produced by nonlinear loads has been constantly raised in the field of power quality. Such a problem becomes even more difficult when the voltage supply has already been polluted with harmonics. This context is further investigated in this work by presenting measurement results showing how the harmonic currents generated by a nonlinear load can depend on the distortion parameters of the voltage supply. When dealing with the representation of a nonlinear load through admittances, whose magnitude and angle depend on the harmonic content of the supply voltage, the tensor based procedures are accurate enough when the load admittance loci yields to a circle, which is usually the case for simulations. However, this modeling approach does not fit all types of loads. To account for the admittance variation due to the dependency on the supply voltage angle, this work introduces a special procedure involving a collection of admittance matrices, which is suitable for any load modeling, as it can use data even from measurement. The method is based on the iterative calculation using an updated Norton admittance, which takes into account the magnitude and angle voltage dependency behavior of the nonlinear load. Once the parameters from the electrical system and loads are gathered, the method provides a deterministic way of assessment the line current produced by a single load or a group of these specific loads. Besides the mentioned measurements, numerical calculations comparing results from time-domain simulation and the proposed methodology are presented for validation purposes. (C) 2017 Elsevier B.V. All rights reserved.
机译：在电能质量领域，计算非线性负载产生的谐波电流的问题一直存在。当电源已经被谐波污染时，这种问题变得更加困难。在此工作中，通过提供测量结果来进一步研究这种情况，该测量结果显示了非线性负载产生的谐波电流如何取决于电压源的失真参数。当通过导纳处理非线性负载的表示时，其大小和角度取决于电源电压的谐波含量，当负载导纳位点屈服为一个圆时，基于张量的过程足够准确，这在仿真中通常是这种情况。但是，这种建模方法并不适合所有类型的载荷。为了解决由于对电源电压角的依赖性而导致的导纳变化，这项工作引入了一个特殊的过程，该过程涉及导纳矩阵的集合，该过程适用于任何负载建模，因为它甚至可以使用来自测量的数据。该方法基于使用更新的诺顿导纳的迭代计算，其中考虑了非线性负载的大小和角度电压依赖性行为。一旦收集了来自电力系统和负载的参数，该方法将提供一种确定性的方式来评估单个负载或一组这些特定负载产生的线路电流。除了提到的测量，还提供了时域仿真结果与提出的方法进行比较的数值计算，以进行验证。 （C）2017 Elsevier B.V.保留所有权利。

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