中国电机工程学报2025，Vol.45Issue(10)：3858-3864,中插14,8.DOI:10.13334/j.0258-8013.pcsee.232187
一种水电机组调速系统稳定性分析方法及超低频振荡抑制
A Stability Analysis Method and Ultra-low Frequency Oscillation Suppression for Hydropower Governor System
汪芳宗 1余坤 1李默2
作者信息
- 1. 三峡大学电气与新能源学院,湖北省宜昌市 443002
- 2. 湖北三峡职业技术学院,湖北省宜昌市 443000
- 折叠
摘要
Abstract
The governor system of hydropower unit includes dead zone and amplitude limiter,which is a typical non-smooth dynamic system and also a linear switched system.If the control parameters are not set reasonably,the switched system would cause switching oscillation phenomenon.So far,the governor system of hydropower unit has encountered multiple times ultra-low frequency oscillation problems related to governor dead-zone and amplitude limiter.To this end,the describing function method is mainly and currently used to analyze the stability of the governor system.The describing function method is a frequency domain engineering approximation method,that requires certain prerequisites to be met in practical applications.To solve the problem of ultra-low frequency oscillation,this paper proposes a new and time-domain state-space based stability analysis method with theoretical proof.The proposed method can be used for stability analysis of general smooth dynamic systems as well as discontinuous differential systems.Applying this method to the stability analysis and optimization of control parameters for hydropower governor system can completely avoid the ultra-low frequency oscillation problem.The example result verifies the effectiveness of the proposed new method.关键词
水电机组/调速系统/线性切换系统/超低频振荡/极限环/描述函数法/Filippov方法Key words
hydropower unit/governor system/linear switched system/ultra-low frequency oscillation/limit cycle/describing function method/Filippov method分类
建筑与水利引用本文复制引用
汪芳宗,余坤,李默..一种水电机组调速系统稳定性分析方法及超低频振荡抑制[J].中国电机工程学报,2025,45(10):3858-3864,中插14,8.
