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| 摘要: |
| 在互联多机系统中，存在多种振荡模式，需要重点关注的是主导弱阻尼或负阻尼模式。利用振荡曲线提取多机振荡信息．需要选择合适的曲线，才能得到系统主导振荡模式。分析了两机相对曲线、单机相对于角度中心（COA）曲线、单机相对于惯量中心（COI）曲线存在的问题，指出扩展等面积法（EEAC）利用分群的概念首先确定系统主导振荡模式的中心位置，利用轨迹聚合的概念弱化非主导模式对主导模式的影响．利用相对运动的概念，获得等值单机曲线提取信息。算例仿真结果表明．EEAC等值机模型可以很好地提取出主导振荡信息，并且可以显示系统振荡的中心位置。 |
| 关键词: 系统主导模式 扩展等面积法 低频振荡 |
| DOI： |
| 分类号:TM712 |
| 基金项目:南京工程学院校科研和教改项目 |
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| Select swing curve to distill low-frequency oscillation information |
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HAO Si-peng ZHANG Yang-fei LI Xian-yun
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| Abstract: |
| There are different oscillation modes in inter-area system,while the dominant low damping or negative damping mode should be focused on. It is needed to select appropriate swing curve to distill the dominant mode. The insufficiencies of two-machine relative curve,one-machine relative COA curve and one-machine relative COI curve are analyzed. It is pointed out that,EEAC uses the concept of classification to determine the center of dominant oscillation mode and weakens the influences of other modes by tracking clustering ;an equivalent single-machine curve is then obtained by relative moving to distill the low-frequency oscillation information. Case simulation shows that EEAC model can get dominant oscillation information and display the center of system oscillation. |
| Key words: system dominant mode EEAC low-frequency oscillation |
