| 引用本文: | 陈宝平,林涛,陈汝斯,张健南,盛逸标,徐遐龄.机侧与网侧多通道附加阻尼控制器参数协调综合抑制低频振荡和次同步振荡[J].电力自动化设备,2018,(11): |
| CHEN Baoping,LIN Tao,CHEN Rusi,ZHANG Jiannan,SHENG Yibiao,XU Xialing.Parameter coordination of generator-side and grid-side multi-channel supplementary damping controllers to suppress low-frequency oscillation and sub-synchronous oscillation comprehensively[J].Electric Power Automation Equipment,2018,(11): |
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| 摘要: |
| 由于低频振荡与次同步振荡存在阻尼耦合，针对一种特定振荡模式设计控制器，会对其他频段的振荡模式造成不利的影响。综合考虑低频振荡与次同步振荡这2种模式，基于模式分离方法设计机侧与网侧附加阻尼控制器，将阻尼耦合问题转化为控制器之间的参数协调优化问题。使各控制器之间以及对应同一振荡模式的各通道之间的参数协调配合，以综合抑制低频振荡与次同步振荡，最大限度地降低模式之间的阻尼耦合；在协调优化过程中，对次同步振荡模式的阻尼比阈值进行动态设定，即次同步振荡模式的频率越大，其所需阻尼比的阈值越小。特征值分析与时域仿真结果均表明，所提协调控制策略能显著地改善系统各频段的阻尼特性；相比于传统的阻尼控制策略，所提协调控制策略具有更好的阻尼效果。 |
| 关键词: 低频振荡 次同步振荡 阻尼耦合 机侧/网侧多通道附加阻尼控制器 动态阻尼比 协调优化 |
| DOI：10.16081/j.issn.1006-6047.2018.11.008 |
| 分类号:TM712 |
| 基金项目:国家重点研发计划项目(2017YFB0902000,2017YFB0902002)；国家电网公司总部科技项目(可再生能源发电基地直流外送系统的稳定控制技术)(SGXJ0000KXJS1700841) |
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| Parameter coordination of generator-side and grid-side multi-channel supplementary damping controllers to suppress low-frequency oscillation and sub-synchronous oscillation comprehensively |
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CHEN Baoping1, LIN Tao1, CHEN Rusi1, ZHANG Jiannan1, SHENG Yibiao1, XU Xialing2
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1.School of Electrical Engineering, Wuhan University, Wuhan 430072, China;2.Central China Electric Power Dispatching and Communication Center, Wuhan 430077, China
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| Abstract: |
| 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. |
| Key words: low-frequency oscillation sub-synchronous oscillation damping coupling generator side/grid-side multi-channel supplementary damping controllers dynamic damping ratio coordinative optimization |
