| 引用本文: | 张宇辉,李哲,李天云,等.次同步谐振的变尺度全方位扫描Duffing振子检测方法[J].电力系统保护与控制,2014,42(14):122-127.[点击复制] |
| ZHANG Yu-hui,LI Zhe,LI Tian-yun,et al.Subsynchronous resonance variable scale and comprehensive scanning Duffing oscillator detection method[J].Power System Protection and Control,2014,42(14):122-127[点击复制] |
|
| 摘要: |
| 针对传统Duffing振子检测方法参数设定繁复、限制条件多的问题,为了快速、准确地检测出微弱次同步谐振信号，根据次同步谐振产生原理，提出了一种变尺度全方位扫描Duffing振子次同步谐振信号检测方法。通过引入尺度系数，实现了对大参数信号的检测；使用全方位扫描方法，消除检测的初相位死区。采用不同信噪比次同步谐振信号进行仿真检测，结果表明所提方法具有检测频率范围广、抗噪性强、对检测微弱信号准确度高的优点。 |
| 关键词: 次同步谐振 变尺度Duffing振子 全方位扫描 信噪比 |
| DOI：10.7667/j.issn.1674-3415.2014.14.020 |
| 投稿时间：2013-10-13修订日期：2013-12-04 |
| 基金项目: |
|
| Subsynchronous resonance variable scale and comprehensive scanning Duffing oscillator detection method |
| ZHANG Yu-hui,LI Zhe,LI Tian-yun,DUAN Wei-run,WANG Li-jun,ZHAO Tian-zhi |
| (College of Electrical Engineering, Northeast Dianli University, Jilin 132012, China;Harbin Power Supply Bureau, Harbin 150006, China) |
| Abstract: |
| Traditional Duffing oscillator detection method is set too complicatedly and has many restrictions. In order to detect the weak subsynchronous resonance signal quickly and accurately, based on the basic principle of subsynchronous resonance, this paper presents a varying scale and comprehensive scanning Duffing oscillator subsynchronous resonance detection method. Through the introduction of the coefficient of scale, a large-parameter signal detection is achieved. By using the comprehensive scanning method, the detection dead zone of the initial phase angle is eliminated. The simulations of sub-synchronous resonance detections with different signal-to-noise ratios are conducted. Results show that the method has a wide detection frequency range, good noise immunity and high accuracy of weak signal detection. |
| Key words: subsynchronous resonance varying scale Duffing oscillator comprehensive scanning signal-to-noise ratio |
