| 一种基于调制脉冲叠加的快速电网谐波阻抗测量方法 |
| |
| 引用本文： | 岳小龙,张政华,师洪涛,张东,卓放.一种基于调制脉冲叠加的快速电网谐波阻抗测量方法[J].变流技术与电力牵引,2013(6):36-41. |
| |
| 作者姓名： | 岳小龙 张政华 师洪涛 张东 卓放 |
| |
| 作者单位： | 西安交通大学电气工程学院; |
| |
| 基金项目： | 2011年国家自然科学基金项目(51177130);台达2011电力电子科教发展计划重点项目(DREK2011002) |
| |
| 摘 要： | 鉴于传统的测量方法测量时间长、高频准确性差，文章提出了一种新的谐波电流注入形式进行阻抗测量的方法，它可以更加快速准确地获取电网阻抗特性。该方法采用了正弦幅度调制，将方波脉冲信号频移到不同的频率区间，然后将这些调制后的信号叠加，即可得到一个频谱丰富且整个频段幅值衰减都很小的信号采用这种形式的信号作为注入扰动电流，所得到的测量仿真结果能够表明该方法的有效性。
|
| 关 键 词： | 谐波阻抗 阻抗测量 谐波电流注入 正弦幅度调制 信号叠加 |
A Rapid Impedance Measurement Method Based on Superposed Modulated Square Pulse |
| |
| YUE Xiao-long,ZHANG Zheng-hua,SHI Hong-tao,ZHANG Dong,ZHUO Fang.A Rapid Impedance Measurement Method Based on Superposed Modulated Square Pulse[J].Converter Technology & Electric Traction,2013(6):36-41. |
| |
| Authors: | YUE Xiao-long ZHANG Zheng-hua SHI Hong-tao ZHANG Dong ZHUO Fang |
| |
| Institution: | (School of Electrical Engineering, Xi＇an Jiaotong University, Xi＇an, Shaanxi 710049, China) |
| |
| Abstract: | A new current injection method was presented for impedance measurement to solve the problems in traditional methods, such as long measuring time and inaccuracy of high frequency. It can get the grid impedance characteristics more rapidly and accurately. Sinusoidal amplitude modulation is used in this method to shift square-wave impulse signals to different frequency hands. Therefore, a signal with large frequency bandwidth and small amplitude attenuation can be obtained by superposing square pulse signals with sinusoidal amplitude modulation. When the signal is injected to the system as a current source, the simulation results demonstrate the effectiveness of this method. |
| |
| Keywords: | harmonic impendence impendence measurement harmonic current injection sinusoidal amplitude modulation signal superposing |
| 本文献已被 CNKI 维普 等数据库收录！ |
