水力发电2025，Vol.51Issue(5)：52-57,6.
机组瞬时超出力工况大波动过渡过程研究
Study on Transient Process of Large Fluctuations in Instantaneous Excess Output Operating Condition of Hydro-turbine Units
陈旭云 1曾镇铃 2周振忠 2李高会 3殷晶 2韩伶俐2
作者信息
- 1. 水电水利规划设计总院,北京 100120||河海大学水利水电学院,江苏 南京 210024
- 2. 水电水利规划设计总院,北京 100120
- 3. 中国电建集团华东勘测设计研究院有限公司,浙江 杭州 311122
- 折叠
摘要
Abstract
To investigate the impact of over-generation by hydro-turbine units on the large-amplitude hydraulic transient characteristics of a water conveyance and power generation system,the basic water hammer equations are solved using the method of characteristics and the finite difference method,and the large-amplitude transient process under the condition of 8%over-generation of the rated load is analyzed based on the actual data of three existing power stations.The results show that the over-generation has a minor impact on the maximum pressure in spiral casing,the minimum pressure in draft tube,and the maximum surge in surge chamber,but it significantly affects the maximum speed rise rate of the units.To avoid the speed rise rate exceeding the control value of speed regulation and protection system,the maximum speed rise rate can be effectively reduced within a certain range by optimizing the valve closure law,while ensuring that parameters such as the maximum pressure in spiral casing have sufficient safety margins.This study provides a theoretical basis for the safe control of over-generation operation of hydro-turbine units.关键词
水电站/超出力工况/灵活调节/一次调频/过渡过程/机组转速Key words
hydropower station/over-generation operating condition/flexible regulation capacity/primary frequency control/transient process/rotating speed of unit分类
水利科学引用本文复制引用
陈旭云,曾镇铃,周振忠,李高会,殷晶,韩伶俐..机组瞬时超出力工况大波动过渡过程研究[J].水力发电,2025,51(5):52-57,6.
