This paper investigates the critical stable sectional area (CSSA) of downstream surge tank (DST) hydropower plant with sloping ceiling tailrace tunnel (SCTT). Firstly, two types nonlinear mathematical model SCTT during transient process are established. Then, criterion operation stability is obtained based on theory. Formulae for CSSAs DST under derived. Finally, similarities, differences, and ...

Nowadays, it is important to consider environmental issues, as ecological problems and their severe effects are intensifying in Iran, particularly in Khuzestan province. The environmental effects of hydroelectric plants are highly regarded due to their significant impact on an extensive area. Lack of safe path for fish passing through the turbines is one of these damages. In order to deal with ...

In this paper, an improved cascade control strategy is presented for hydroturbine speed governors. Different from traditional proportional-integral-derivative (PID) control and model predictive control (MPC) strategies, the performance index of the outer controller is constructed by integrating the entropy and mean value of the tracking error with the constraints on control energy. The inner co...