Improved predictive calculation-based extinction angle control for HVDC

2021 ◽  
Vol 128 ◽  
pp. 106633
Author(s):  
Juanjuan Wang ◽  
Zhaoxin Wen ◽  
Chuang Fu ◽  
Qiumei Wu ◽  
Yingming Gong ◽  
...  
Keyword(s):  
Extinction Angle

scholarly journals Simplified method based on an intelligent model to obtain the extinction angle of the current for a single-phase half wave controlled rectifier with resistive and inductive load

2015 ◽  
Vol 13 (2) ◽  
pp. 167
Author(s):  
José Luis Calvo-Rolle ◽  
Héctor Quintian-Pardo ◽  
Emilio Corchado ◽  
María del Carmen Meizoso-López ◽  
Ramón Ferreiro García
Keyword(s):  
Single Phase ◽  
Inductive Load ◽  
Extinction Angle ◽  
Half Wave ◽  
Simplified Method ◽  
Intelligent Model

The determination of the maximum extinction-angle, optic axial angle, and birefringence in twinned crystals of monoclinic pyroxenes in thin section by the Becke method

1914 ◽  
Vol 17 (80) ◽  
pp. 147-149
Author(s):  
Harvey Collingridge
Keyword(s):  
Thin Section ◽  
Twin Plane ◽  
Optic Axis ◽  
Axial Angle ◽  
Extinction Angle ◽  
Optical Determination ◽  
The Difference ◽  
Relative Retardation

In nearly every thin section of a rock containing monoelinic pyroxenes it will be found that one or more crystals twinned on the orthopinacoid (100) are included. In such crystals the twin-plane is marked very clearly by the difference of relative retardation and extinction, and also by the interference-bands if the twin-plane is inclined to the plane of section. For the purposes of the complete optical determination, it is essential for the proposed method that one half of the twin should exhibit the emergence of an optic axis suitable for the determination of the optic axial angle by the Becke method.

The deceleration mechanism and the critical extinction angle of downward flame spread over inclined cellulosic solids

2017 ◽  
Vol 124 ◽  
pp. 185-190 ◽  
Author(s):  
Ying Zhang ◽  
Xiangfeng Chen ◽  
Yuhan Song ◽  
Xinjie Huang ◽  
Yi Niu ◽  
...  
Keyword(s):  
Flame Spread ◽  
Extinction Angle ◽  
Critical Extinction ◽  
Downward Flame Spread

On crossite from Anglesey

1951 ◽  
Vol 29 (215) ◽  
pp. 792-798 ◽  
Author(s):  
Norman Holgate
Keyword(s):  
Extinction Angle

The occurrence of a member of the glaucophane group of minerals in Anglesey has been known since 1888, in which year Blake reported the presence of a blue amphibole in a schist exposed in the neighbourhood of the Anglesey Column, west of the Menai Bridge. In the course of his paper Blake made general remarks on the petrography of the schist and on its field relations. He dwelt at some length on the question of the identity of the blue amphibole which is its most notable constituent, describing its columnar habit and pleochroism, and recording an extinction angle of 15° with the axis of elongation (c). By comparison with a description of glaucophane due to Rosenbusch, Blake concluded that the blue amphibole from the Anglesey rock is a normal glaucophane, although it, an extinction angle as recorded by him is considerably in excess of the 4° to 6° mentioned by Rosenbusch.

scholarly journals High Performance Control Strategy of a LCC HVDC System for Power System Enhancement

2019 ◽  
Vol 8 (6S3) ◽  
pp. 1765-1769
Keyword(s):  
Control Strategy ◽  
High Performance ◽  
Voltage Control ◽  
Good Judgment ◽  
Energy Control ◽  
Performance Control ◽  
Hvdc System ◽  
Extinction Angle ◽  
Wide Range ◽  
Set Up

It is well-known that traditional LCC HVDC system is not capable of control its reactive strength and terminal AC voltages. This paper investigates the reactive electricity and AC voltages manage at the inverter aspect of the LCC HVDC system with controllable capacitors. The system’s capability of operating below poor extinction angle is utilized to reap a wide range of reactive energy control and, mainly, the capacity of exporting reactive electricity. The effectiveness of the reactive strength/voltage control functionality for the proposed device is demonstrated via simulation outcomes the use of actual Time digital Simulator (RTDS). To verify the effectiveness of the reactive electricity and voltage control, CCC HVDC and LCC HVDC with SVC are also set up in RTDS. The proposed idea makes an integration of Fuzzy good judgment which assists in accurate control of capacitors and makes the device green by means of lowering the consumption of Reactive energy. All of the outcomes are acquired from the MATLAB simulations and numerous graphs are plotted.

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