Author(s)

R. A. Saeed, M. M. Faqe & F. M. Khoshnaw

Abstract

Derbendikhan power station works under different load conditions, because the power demand of the electric distribution system varies throughout the day. It is usually higher during daylight and lower at night. The power P generated by a hydropower plant depends on head H, discharge Q and efficiency η. Hence it is necessary to understand how these quantities (H, Q, η and P) vary. Model test data for the operational parameters rotational speed nm, head Hm, discharge Qm, load Pm and efficiency ηm can be converted to the values of those quantities in the prototype. In this study a statistical method – Path Analysis – is proposed for the first time to determine the effect of head H, discharge Q and efficiency η on the power output P of the prototype turbine, and also the behavior of these quantities with respect to one another. The results shows that P mainly depends on H, Q and η, and the total effect of Q on P is more than the total effect of either H or η. Keywords: Path Analysis Method, hydropower station, operational parameters. 1 Introduction The hydraulic turbine is usually designed for particular values of net head H, discharge Q, output power P and efficiency η which are known as the design conditions. Relation between any two of the above quantities is called a characteristic of the machine. The Q and H are the physical independent variables. It is, therefore customary to study the variation of all other quantities with respect to the variation of any one of the independent quantities. The power

Keywords

Path Analysis Method, hydropower station, operational parameters.