This paper emphasize on controlling the process variable parameters such as level and flow with real time implementation of gate control of hydroelectric power plant using Programmable Logic Controller. In this work, a programmable logic controller is used as an industrial computer playing the role of a control device and push buttons, level and flow sensors provide incoming signals to the cont...

In this paper, an optimisation problem for calculating the best energy bids of a set of hydro power plants in a basin is proposed. The model is applied to a real Spanish basin for the short-term (24-hour) planning of the operation. The algorithm considers the ecological flows and social consumptions required for the actual operation. One of the hydro plants is fluent, without direct-control abi...

ABSRACT Sliding mode control has received much attention due to its major advantages such as guaranteed stability, robustness against parameter variations, fast dynamic response and simplicity in the implementation and therefore has been widely applied to control nonlinear systems. This paper discus the sliding mode control technic for controlling hydropower system and generalized a model which...

The paper discusses main ideas of design principles and results of practical implementation of ICT for assessment and prediction of power plant operator fitness-for-duty. They are discussed reasons of discrepancy of operator psychophysiological opportunities to occupational requirements that can reduce his/her reliability and general fitness-for-duty. Principles of functioning of the system for...

objective: rosa damascena mill l. (r. damascena) is a well-known plant with fragrant effects. several therapeutic effects of this plant on respiratory, gastrointestinal and nervous systems have been reported. it is also suggested to have beneficial effect on cardiovascular system especially blood pressure regulation. the present study was carried out to evaluate acute cardiovascular effect of h...

This paper deals with automatic generation control of multi area power system using a Fuzzy PID controller. The controller parameters are optimized by Grey Wolf Optimizer (GWO) algorithm. Initially, Hydro-Thermal-Gas two area power systems is considered and superiority of the proposed controller is verified by comparing the results with GWO optimized classical PID controller as well as recently...

background: thymus daenensis is on e of the endemic aromatic species in iran that its essential oil is used in food and pharmaceutical industries. objective: in this study, the effects of plant growth stages and distillation methods on essential oil content and thymol percentage of this species were evaluated. methods: the aerial parts of th. daenensis were collected in three stages of plant gr...

Background and objectives: Bakhtiari savory belonging to the Lamiaceae family is an endemic species, which is rich in carvacrol, thymol and other aromatic compounds. The essential oil of the plant could be added in fatty food against radicals similar to synthetic antioxidant BHT. Methods: To determine the best extraction methods on qualitative and antioxidant c...

This paper presents a mathematical model of hydro power units, especially the governor system model for different operating conditions, based on the basic version of the software TOPSYS. The mathematical model consists of eight turbine equations, one generator equation, and one governor equation, which are solved for ten unknown variables. The generator and governor equations, which are differe...

eryngium caucasicum trautv. (apiaceae) is a perennial herbaceous plant with about one meter height, an endemic species that has been distributed in the northern parts of iran. the plant leaves are normally used in medicine and food industries in iran.the plant has several medicinal properties including enforcing generative power, diuretic, lenitive and appetizer. in this research differents par...