Parameter coordination of generator-side and grid-side multi-channel supplementary damping controllers to suppress low-frequency oscillation and sub-synchronous oscillation comprehensively

被引：0
|
作者：
Chen B. [1 ]
Lin T. [1 ]
Chen R. [1 ]
Zhang J. [1 ]
Sheng Y. [1 ]
Xu X. [2 ]
机构：
[1] School of Electrical Engineering, Wuhan University, Wuhan
[2] Central China Electric Power Dispatching and Communication Center, Wuhan
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2018年 / 38卷 / 11期
关键词：
Coordinative optimization; Damping coupling; Dynamic damping ratio; Generator-side/grid-side multi-channel supplementary damping controllers; Low-frequency oscillation; Sub-synchronous oscillation;
D O I：
10.16081/j.issn.1006-6047.2018.11.008
中图分类号：
学科分类号：
摘要：
Because of the damping coupling between the LFO(Low-Frequency Oscillation) and SSO (Sub-Synchronous Oscillation), the controllers designed for a specific oscillation mode may have adverse effects on the oscillation modes of other frequency bands. Taking both LFO and SSO into account, the generator-side and grid-side supplementary damping controllers are designed based on the mode-separation method, and the damping coupling issue is transformed into a parameter coordinative optimization problem among controllers. The LFO and SSO are suppressed comprehensively and the damping coupling between modes is minimized by coordinating the parameters of controllers and channels corresponding to the same oscillation mode. The damping ratio threshold of SSO mode is dynamically set in the coordinative optimization process, that is, the larger the frequency of SSO mode, the smaller the required threshold of the damping ratio. Both eigenvalue analysis and time-domain simulation results show that the proposed coordinative control strategy can significantly improve the damping characteristics of the objective frequency bands, and it has better damping effects than the conventional damping control strategy. © 2018, Electric Power Automation Equipment Press. All right reserved.
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页码：50 / 56and62
页数：5612
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