The short term hydrothermal scheduling (STHTS) is a daily planning proposition in power system operation. The main purpose of hydro thermal generation scheduling is to minimize the overall operation cost and to satisfy the given constraints by scheduling optimally the power outputs of all hydro and thermal units under study periods, given electrical load and limited water resource. This paper p...

Recent growth in the renewable energy industry has increased government support for alternative energy. In the United States, hydropower is the largest source of renewable energy and also one of the most efficient. Currently, there are 30,000 megawatts of potential energy capacity through smalland micro-hydro projects throughout the United States. Increased development of micro-hydro could doub...

AIM To evaluate corneal injury during general anesthesia and analyze the protective effect of medical hydro-gel eye patch in clinics. METHODS Seventy-six patients with 152 eyes undergoing general anesthesia were included. None had positive corneal fluorescein staining before surgery. Both eyes of each patient were analyzed, with one randomly allocated to receive medical hydro-gel eye patch, a...

Central Electricity Authority have completed the preliminary ranking study of hydro electric schemes to harness the balance hydro electric potential in the country. Hon’ble Union Minister of Power Shri Suresh Prabhu released the report on "Preliminary Ranking Study of Hydro Electric Schemes" on 5th February 2002 at the International Conference and Business Meet on Non-fossil fuel generation org...

This paper uses a real options approach to examine the impact of ramping rate restrictions imposed on hydro operations to protect aquatic ecosystems. We consider the effect on hydro plant value in order to inform policy decisions. A novelty of the paper is in examining the optimal operation of a prototype hydro power plant with electricity prices modelled as a regime switching process. We show ...

A coordinated strategy between wind and reversible hydro units for the mid-term that reduces the imbalance of wind power and improves system efficiency is proposed. A stochastic mixed integer linear model is used, which maximizes the joint profit of wind and hydro energies and Conditional Value at Risk (CVaR), where CVaR is the tool utilized to model risk. The offering strategies studied are: i...

Micro-hydro generator schemes are an attractive choice for electricity generation in remote locations or underdeveloped communities where a grid supply is not available. Since such systems must be low cost, reliable, and robust to minimise maintenance requirements, the use of a standard squirrel cage induction motor is appealing – either three phase or single phase depending on power ratings an...

Results of an investigation dealing with the behaviour of grid connecfod induction generators (GCIG) driven by typical prime movers such as minihydro/wind turbines are presented. Certain practical operational ..problems of such systems are identified. Analytical techniques are developed to study the behaviour of such systems . The system consists of the induction generator (IG) feeding a 11 kV ...

6.1 Best Practices in Operation & Maintenance of Hydro Power stations shall be such that by following such procedures, the downtime of individual generating Unit & Plant should be minimum. The operational reliability of the generating units of the hydro power stations shall be such that whenever the grid demands, it should be available for generation. Some of the aspects, which can be taken int...