Results 121 to 130 of about 147,345 (296)
High Voltage, EarlyView.ABSTRACT High altitude electromagnetic pulse (HEMP), as a steep slope and high amplitude instantaneous energy shock, has stronger coupling and greater destructive power, which can easily cause the secondary control device of the substation to malfunction.
Long Jin +5 more
wiley +1 more source
800 kV Fast Circuit Breaker: Mechanical Coupling Modelling, Buffer Design and Development
High Voltage, EarlyView.ABSTRACT The 800 kV fast circuit breaker (CB) used in ultra‐high voltage (UHV) converter transformer can reduce the total breaking time to 25 ms. It significantly improves the action speed and breaking capacity of the CB, with promising broad application prospects.
Enyuan Dong +6 more
wiley +1 more source
REG670 Generator Protection Relay - Commissioning Guide [PDF]
, 2014 This bachelor’s thesis comprises the generation of a user manual and MEGGER FREJA 300 test templates for ABB’s generator protection relay REG670. The commissioner is Wärtsilä Finland OY, Field Services department in Runsor, Vaasa.
Hermans, Anders
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High Voltage, EarlyView.ABSTRACT The long‐term hydrophobic stability of silicone rubber (SiR) insulators is essential for their reliability in high‐voltage direct current (HVDC) applications. This study investigates the effect of nano‐silica fillers with varying specific surface areas (SSA = 120, 200 and 300 m2/g) and different concentrations of alumina trihydrate (ATH ...
Mahmoud A. Ali +3 more
wiley +1 more source
The Dark Pyramid: Unpacking the Multidimensional Nature of the Dark Side of Leadership
British Journal of Management, EarlyView.Abstract The dark side of leadership has been employed as an umbrella term to cover an array of concepts typically concerned with the dysfunctionality and/or toxicity of individual leaders. As the field of leadership studies moves towards ‘post‐heroic’ perspectives, we apply the same ontological positioning, adopting a ‘post‐villainous’ perspective in ...
Peter Stephenson +2 more
wiley +1 more source
Modified firefly algorithm for directional overcurrent relay coordination in power system protection / Muhamad Hatta Hussain [PDF]
, 2020 Nowadays, modern power systems are interconnected and protected by Directional Overcurrent Relays (DOCRs). Therefore, the protection coordination scheme poses great challenge especially in multi-source networks due to network topology and microprocessor ...
Hussain, Muhamad Hatta
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CARE AND CONTROL IN URBAN BRAZIL: The Subaltern Archive of Portarias
International Journal of Urban and Regional Research, EarlyView.Abstract Security infrastructures permeate everyday life in Brazilian cities. Although security guards and doormen play an important and omnipresent role as social and technological mediators, their practices and perceptions have received little attention.
Tilmann Heil, Susana Durão
wiley +1 more source
Current Transformer Error Correction
This paper presents the development of micro- processor based device with ability to decrease protection-type current transformer measurement error in the area of small currents.
Dolgicers, Aleksandrs +1 more
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The British Journal of Sociology, EarlyView.ABSTRACT Tracing the early adoption of computer gang databases by the Los Angeles County Sheriff's Department and the Los Angeles Police Department in the 1980s to the deployment of computationally‐assisted surveillance during the Vietnam War, this paper uses a genealogical approach to compare surveillance technologies developed across the arc of ...
Christina Hughes
wiley +1 more source
International Journal of Electrical Power & Energy SystemsTime-domain distance protection has a good transient performance and operation speed when applied to wind power transmission lines. In this paper, the error analysis and improved method of phase-to-phase time-domain distance protection are investigated ...
Zhongrun Xie +7 more
doaj +1 more source