Dynamic characteristics analysis of shafting and hydro-turbine governing system coupling of hydropower units

时有松; 张舸; 程建; 李银斌; 张东峰; 郑阳

doi:10.11660/slfdxb.20240409

English Version Journal Login

您当前的位置：

首页 >

文章列表页 >

Dynamic characteristics analysis of shafting and hydro-turbine governing system coupling of hydropower units

更新时间：2026-07-22

- Dynamic characteristics analysis of shafting and hydro-turbine governing system coupling of hydropower units
- Journal of Hydroelectric Engineering Vol. 43, Issue 4, (2024)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：10.11660/slfdxb.20240409
  CLC：
- Online First：25 April 2024，
  
  Published：2024
- 稿件说明：
移动端阅览
时有松, 张舸, 程建, et al. Dynamic characteristics analysis of shafting and hydro-turbine governing system coupling of hydropower units[J]. Journal of Hydroelectric Engineering, 2024, 43(4).
DOI：

时有松, 张舸, 程建, et al. Dynamic characteristics analysis of shafting and hydro-turbine governing system coupling of hydropower units[J]. Journal of Hydroelectric Engineering, 2024, 43(4). DOI： 10.11660/slfdxb.20240409.

摘要

水电机组轴系-调速耦合系统动态特性尚未揭示，制约机组调节优化控制。为此，建立了水电机组不同运行模式轴系-调速耦合系统非线性数学模型，研究分析了耦合系统的非线性动态响应特性。首先，采用Hopf分岔理论分析调速系统稳定域和分岔特性。进一步，仿真分析机组不同运行模式轴系-调速耦合系统的时频动态响应特性。结果表明：机组孤网和并网运行调速系统均存在超临界Hopf分岔，机组并网模式调速器参数稳定域较孤网模式增大。机组并网模式调速系统机组、电网频率动态响应存在多频特性，轴系振动会引发调压室水位动态响应超超低频振荡。并网与孤网模式相比并网模式系统动态响应超调量增大，调节时间缩短。机组孤网和并网运行轴系振动均为多频拟周期振动，但孤网模式轴系振动特性更复杂。

Abstract

The dynamic characteristics of the shafting and hydro-turbine governing system (HTGS) of hydropower units (HU) have not been revealed

which restricts the optimal control of HU regulation. This paper develops a nonlinear mathematical model for a shafting-HTGS coupling system in different operating modes

and examines its nonlinear dynamic response characteristics. First

the Hopf bifurcation theory is used to analyze the stable region and bifurcation characteristics of the HTGS. Then

the time-frequency dynamic response characteristics of this coupling system are simulated and analyzed for its different operating modes. The results show that supercritical Hopf bifurcation exists in HTGS of both the isolated network and grid-connected HU

and the stability region of the governor parameter under the grid-connected HU is significantly larger than that of the isolated network HU. The HTGS frequency dynamic response of the HU and the power grid in the grid-connected mode have multi-frequency characteristics

and shafting vibration causes the dynamic response of the surge tank water level to ultra-low frequency oscillation (ULFO). The dynamic response overshoot of the grid-connected HU is significantly larger than that of the isolated HU

but its adjustment time is shorter. The shafting vibrations of isolated and grid-connected HUs are multi-frequency quasi-periodic

but the dynamic characteristics of shafting vibrations of the isolated HU are more complex.

关键词

Keywords

references

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Vibration fault diagnosis of hydropower unit by using stochastic resonance and multidimensional permutation entropy

Study on improved sliding mode control strategy suitable for hydropower units

Vibration fault diagnosis for hydro-power units based on Bayesian network

Denoising algorithm of pressure fluctuation signals of hydraulic turbines based on VMD and permutation entropy

Study on flow behaviors and energy loss mechanisms in S-characteristic zone of pumped storage units

Related Author

赵志高

JIA Rong

HE Yangyang

LI Hui

DONG Kaisong

XIAO Zhihuai

LIU Dong

YAN Bo

Related Institution

Xi’an University of Technology

Gansu province electric power research institute

State Grid Jiangxi Electric Power Co., Ltd.Research Institute

School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology

School of Power and Mechanical Engineering, Wuhan University

AI问答

⁰