5,8-Dimeth­oxy-2-phenyl-1,4-dihydro­quinoline-3-carbonitrile

The crystal structure of the title mol­ecule, C18H16N2O2, can be described as two types of crossed layers parallel to the (110) and (10) planes. An intra­molecular N—H⋯O hydrogen bond occurs

(3RS,4SR)-Methyl 4-(2-chloro-5,8-di­methoxy­quinolin-3-yl)-1-phenyl­pyrrolidine-3-carboxyl­ate

The mol­ecule of the title compound, C23H23ClN2O4, contains a quinolyl unit linked to a functionalized pyrrolidine system with a 3,4-trans arrangement of the substituents. The unit cell contains two stereoisomers that have the absolute stereochemistry 3S,4R and 3R,4S. The pyrrolidine ring adopts a twist conformation with pseudo-rotation parameters P = 258.2 (3)° and τ(M) = 35.3 (1)°. The packing is stabilized by C—H⋯π inter­actions and offset π–π stacking (centroid-to-centroid distance = 3.849 Å, inter­planar distance = 3.293 Å and slippage = 1.994 Å) between phenyl rings, leading to a two-dimensional network

2-Chloro-3-[(E)-(hydrazin-1-yl­idene)meth­yl]-6-meth­oxy­quinoline

In the title compound, C11H10ClN3O, the quinoline ring system is essentially planar, the r.m.s. deviation for the non-H atoms being 0.014 (2) Å with a maximum deviation from the mean plane of 0.0206 (14) Å for the C atom bonded to the –CH—N=NH2 group. In the crystal, molecules are linked via N—H⋯O and N—H⋯N hydrogen bonds, forming zigzag layers parallel to (010)

Development of a Control Strategy for the Hybrid Energy Storage Systems in Standalone Microgrid

The intermediate energy storage system is very necessary for the standalone multi-source renewable energy system to increase stability, reliability of supply, and power quality. Among the most practical energy storage solutions is combining supercapacitors and chemical batteries. However, the major problem in this kind of application is the design of the power management, as well as the control scheme of hybrid energy storage systems. The focal purpose of this paper is to develop a novel approach to control DC bus voltage based on the reference power\u27s frequency decomposition. This paper uses a storage system combined of batteries and supercapacitors. These later are integrated in the multi-source renewable energy system to supply an AC load. This technique uses the low-pass filters\u27 properties to control the DC bus voltage by balancing the generated green power and the fluctuating load. The hybrid storage system regulates power fluctuations by absorbing surplus power and providing required power. The results show good performances of the proposed control scheme, such as low battery current charge/discharge rates, lower current stress level on batteries, voltage control improvements, which lead to increase the battery life

rac-2-(2-Chloro-6-methyl­quinolin-3-yl)-2,3-dihydro­quinolin-4(1H)-one

In the title compound, C19H15ClN2O, the quinoline ring forms a dihedral angle of 43.24 (1)° with the benzene ring of the dihydroquinolinyl system. In the crystal, mol­ecules are linked through a single weak C—H⋯O hydrogen bond, forming ribbons which extend along (100), giving alternating zigzag mol­ecular layers which stack down the b-axis direction

2-(2-Chloro-6,7-dimethyl­quinolin-3-yl)-2,3-dihydro­quinolin-4(1H)-one

In the title mol­ecule, C20H17ClN2O, the dihedral angle between the mean plane of the quinoline ring system and the benzene ring of the dihydro­quinolinone moiety is 57.84 (8)°. In the crystal, mol­ecules are linked into centrosymmetric dimers via pairs of inter­molecular N—H⋯N hydrogen bonds. These dimers are further stabilized by weak π–π stacking inter­actions between pyridine rings with a centroid–centroid distance of 3.9414 (12) Å

2-Chloro­quinoline-3-carboxylic acid

The crystal structure of the title compound, C10H6ClNO2, can be described by two types of crossed layers which are parallel to (110) and (10). The crystal packing is stabilized by inter­molecular C—H⋯O and O—H⋯N hydrogen bonds, resulting in the formation of a two-dimensional network and reinforcing the cohesion of the structure

Synthesis of Some New 3-Pyrrolidinylquinoline Derivatives via 1,3-Dipolar Cycloaddition of Stabilized Azomethine Ylides to Quinolinyl α,β- Unsaturated Ketones

International audienceN-Metallated azomethine ylide generated from methyl (E)-N-benzylideneglycinate, LiBr and triethylamine underwent cycloaddition to quinolyl α,β- unsaturated ketones with excellent diastereoselectivity to afford new functionalised 3-pyrrolidinylquinoline derivatives

Ethyl 4-(2-chloro­quinolin-3-yl)-1-phenyl-1H-pyrrole-3-carboxyl­ate

In the mol­ecule of the title compound, C22H17ClN2O2, the dihedral angles formed by the pyrrole ring with the quinoline and phenyl rings are 67.93 (8) and 28.40 (11)°, respectively. In the crystal structure, mol­ecules are linked into dimers by inter­molecular C—H⋯O hydrogen bonds

A Comparative Experimental Investigation of MPPT Controls for Variable Speed Wind Turbines

This work presents an experimental comparative investigation between Maximum power point tracking control methods used in variable speed wind turbines. In order to enhance the efficiency of the wind turbine system, the maximum power point tracking control has been applied for extracting and exploiting the maximum available wind power. Furthermore, two maximum power point tracking controls have been analyzed, developed, and investigated in real-time using Dspace. The first was optimal torque control without speed control, whereas the second was with speed control. The maximum power point tracking control performance comparison has been performed in a real-time experimental validation to illustrate the advantages of these control on the real wind energy system. The results have been achieved and discussed, where the power efficiency improvements appeared in the transit time and in the steady-state as well. In addition, the proposed optimal torque control for maximum power point tracking with speed control decreased the response time and oscillations, while it increased the power to an interval of 12,5% to 75% compared to that of strategy without speed control in the steady-state and transit state, respectively