Research on the Frequency Control Strategy of Hydro-Thermal Power Generating Units

Abstract

Since being a large number of hydro power units in the Hami-Zhengzhou UHVDC transmission network, it is of great significance for the safety and stability of high-power transmission to master the primary frequency characteristics and differences of hydro power and thermal power. In this paper, the Hami-Zhengzhou UHVDC transmission power grid is taken as a typical research object. The influence of different control parameters on the primary frequency control under the condition of higher hydropower load ratio is simulated and analyzed. The joint adjustment scheme between thermal power unit and hydropower unit is given. The control strategy and feasibility suggestions are put forward.

Keywords

• uhvdc transmission system
• hydro-thermal power units
• dynamic simulation
• frequency control
• frequency stability