Experimental Study on the Optimal Strategy for Power Regulation of Governing System of Hydropower Station

Active power instability during the power regulation process is a problem that affects the operation security of hydropower stations and the power grid. This paper focuses on the dynamic response to power regulation of a hydro-turbine governor in the power control mode. Firstly, the mathematical mod...

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Bibliographic Details
Published inWater (Basel) Vol. 13; no. 4; p. 421
Main Authors Wang, Cong, Wang, De-Kuan, Zhang, Jian-Ming
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.02.2021
Subjects
Acceleration
Algorithms
Alternative energy sources
Analysis
Control algorithms
Control theory
Deceleration
Dynamic response
Energy resources
Field tests
Hydraulic turbines
Hydraulics
hydro-turbine governor
Hydroelectric power
Hydroelectric power stations
hydropower
Laws, regulations and rules
Linear control
Mathematical models
Optimal control
power control mode
Regulations
S-curve control algorithm
Security
Turbines
Water hammer
China
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Summary:Active power instability during the power regulation process is a problem that affects the operation security of hydropower stations and the power grid. This paper focuses on the dynamic response to power regulation of a hydro-turbine governor in the power control mode. Firstly, the mathematical model for the hydro-turbine governing system connected to the power grid is established. Then, considering the effect of water hammer and the guide vane operating speed on power oscillation and reverse power regulation, a novel control strategy based on the S-curve acceleration and deceleration control algorithm (S-curve control algorithm) is proposed to improve power regulation. Furthermore, we carried out field tests in a real hydropower station in order to compare the regulation quality of the novel control strategy based on the S-curve control algorithm with the traditional linear control strategy. Finally, the obtained results show that the proposed optimal control strategy for the hydro-turbine governor improves the stability of power regulation by effectively suppressing reverse power regulation and overshoot. This study provides a good solution for the instability of power and reverse power regulation during the regulation process of the hydro-turbine governor in the power control mode.
ISSN:2073-4441
2073-4441
DOI:10.3390/w13040421