Open AccessAnalysis and Suppression Strategy of Transient Frequency Deviation by Soft Guide Vane Control in Hydro Turbine
Author(s) -
Wu Cai,
Xinlei Shi,
Haidong Shi,
Hong Rong,
Yong Sheng Zhao,
Yongtan Wang,
Meijun Zhang
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1871/1/012019
Subject(s) - penstock , water hammer , transient (computer programming) , control theory (sociology) , frequency deviation , turbine , frequency domain , engineering , electric power system , particle swarm optimization , automatic frequency control , power (physics) , computer science , structural engineering , control (management) , mechanical engineering , physics , electrical engineering , quantum mechanics , artificial intelligence , machine learning , computer vision , operating system
The hydro-dominant characteristic is notable after the asynchronous operation in Southwest China Power Grid which brings worse transient frequency deviation caused by water hammer effect. To prevent the possible cascading failure due to the worse transient frequency deviation in the secondary frequency regulation, the soft guide vane control law is proposed to suppress the water hammer effect in the transient regulation process based on the detailed turbine-penstock model. The discrete state space expression of the turbine-penstock model is built to simulate the regulation effect in the time domain and the PSO (Particle Swarm Optimization) algorithm is applied to optimize the soft guide vane control adjustment factor considering multi-object. Finally, the emergency AGC (Automatic Generation Control) adjustment in the single machine with load transmission system is conducted to verify the effect of transient frequency deviation suppression by optimized soft guide vane control.