In the title Schiff base, C(18)H(22)N(4)O, the hexa-hydro-pyrimidinyl ring adopts a chair conformation. The dihedral angle between the aromatic rings of the 4-(2-phenyl-diazen-yl)phenol unit is 15.7 (1)°. There is an intra-molecular O-H⋯N hydrogen bond between the hydroxyl group and an N atom of the hexa-hydro-pyimidinyl unit. Inter-molecular N-H⋯O and N-H⋯N hydrogen bonds give rise to a layer ...

We propose a new approach to optimize operations of hydro storage systems with multiple connected reservoirs which participate in wholesale electricity markets. Our formulation integrates short-term intraday with long-term interday decisions. The intraday problem considers bidding decisions as well as storage operation during the day and is formulated as a stochastic program. The interday probl...

Nowadays, the pump-storage power plants are a proven solution for storing electricity at large scale and offering flexibility to the power management. Therefore, the hydraulic machines are increasingly subject to off-design operation, start-up and shutdown sequences. However, the fast and frequent switching between pumping mode and generating mode presents technical challenges. In the present s...

Renewable source based micro-generations such as wind and hydro offer the best potential for emission free power in future power systems. This paper investigates the technical issues related to stable and autonomous operation of a micro-grid system consisting of renewable power sources. A small hydro generation unit and a wind farm are the main renewable power generation units in the proposed m...

In the title compound, C(23)H(21)NO(3)S, the piperidine ring of the tetra-hydro-isoquinolinone unit adopts a screw-boat conformation. The thio-phene ring is disordered in a 0.700 (3):0.300 (3) ratio by an approximate 180° rotation of the ring around the C-C bond linking the ring to the tetra-hydro-isoquinolinone unit. The benzene ring of the tetra-hydro-isoquinolinone unit makes dihedral angles...

Power Generation from Renewable energy sources like wind, solar, geothermal, biomass, and hydro is predominant now days and among the renewable energy sources, small hydro and wind energy have the ability to complement each other. For Power generation by small or micro hydro as well as wind systems, the use of squirrel-cage induction generators (SCIGs) is mostly adopted. As regards in recent ye...

Economic needs and the ongoing liberalization of European electricity markets stimulate the interest of power utilities in developing models and optimization techniques for the generation and trading of electric power under uncertainty. Utilities participating in deregulated markets observe increasing uncertainty in load (i.e., demand for electric power) and prices for fuel and electricity on s...

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...

The Western Wind and Solar Integration Study (WWSIS) investigated the operational impacts of very high levels of variable generation penetration rates (up to 35% by energy) in the western United States. This report examines the impact of this large amount of wind penetration on hydroelectric unit operations. Changes in hydroelectric unit operating patterns are examined both for an aggregation o...

Because of the growing nonlinear and complexity nature microgrid systems for example battery energy storage systems, wind-turbine fuel cell, photovoltaic, micro hydro power plants (BESSs/FC/WT/PV/ Micro Hydro), load-frequency management has been a difficulty. The development controller based on Proportional–Integral–Derivative (PID) an autonomous (MG) with hydro, wind, PV RES is shown in this a...