Results 71 to 80 of about 46,909 (228)

Multiterminal High‐Voltage Direct Current Projects: A Comprehensive Assessment and Future Prospects

High Voltage, EarlyView.
ABSTRACT Multiterminal high‐voltage direct current (MT‐HVDC) systems are an important part of modern power systems, addressing the need for bulk power delivery and efficient renewable energy integration. This paper provides a comprehensive overview of recent advances in MT‐HVDC technology, including launched projects and ongoing initiatives.
Mohammad Hossein Mousavi, Hassan Moradi, Kumars Rouzbehi, Vijay K. Sood   +3 more
wiley   +1 more source

Multifunctional scheme for frequency/voltage/stability control in HVDC line under concurrent cyber‐attacks and faults

IET Generation, Transmission & Distribution, 2022
This paper presents a control mechanism on high voltage direct current (HVDC) transmission line for frequency/voltage regulation, fault ride through (FRT) capability, and cyber‐attack/fault detection.
Reza Hemmati, Hossien Faraji
doaj   +1 more source

DC fault isolation study of bidirectional dual active bridge DC/DC converter for DC transmission grid application [PDF]

, 2015
Fast isolation and detection of DC faults is currently a limiting factor in high power DC transmission grid development. Recent research has shown that the role of DC/DC converters is becoming increasingly important in solving various DC grid challenges ...
Aboushady, Ahmed A., Ahmed, Khaled H., Harrye, Yasen A.   +2 more
core   +2 more sources

HYPERSCALING HOUSING: Venture Capital, Real Estate Start‐Ups and the Race to Build a Global Residential Brand

International Journal of Urban and Regional Research, EarlyView.
Abstract What happens when venture capitalists try to reinvent housing in their own image? Synonymous with the rise of Big Tech, venture capitalists (VCs) are asset managers that invest in early‐stage companies, pursuing aggressive growth and market domination. Since the 2008 financial crisis, VCs have poured huge sums into real estate start‐ups.
Tim White
wiley   +1 more source

Fault Ride-through Hybrid Controller for MMC-HVDC Transmission System via Switching Control Units Based on Bang-bang Funnel Controller

Journal of Modern Power Systems and Clean Energy, 2023
This paper proposes a fault ride-through hybrid controller (FRTHC) for modular multi-level converter based high-voltage direct current (MMC-HVDC) transmission systems. The FRTHC comprises four loops of cascading switching control units (SCUs).
Yang Liu, Zehui Lin, Chenying Xu, Lei Wang   +3 more
doaj   +1 more source

Is State Tax Policy Associated With State‐Level COVID‐19 Restrictions? La politique fiscale des États est‐elle associée aux restrictions introduites pendant la crise de COVID‐19 ?

Contemporary Accounting Research, EarlyView.
ABSTRACT During the COVID‐19 pandemic, states imposed restrictions intended to slow the spread of the virus. We investigate whether states' reliance on consumption tax revenue, relative to other tax revenue sources, is associated with the duration of COVID‐19 mobility restrictions.
Nathan C. Goldman, Stephen J. Lusch, Luke Watson   +2 more
wiley   +1 more source

AC and DC fault ride through hybrid MMC integrating wind power

The Journal of Engineering, 2017
To transmit bulk wind power over long distance, using high‐voltage direct current (HVDC) transmission technology with overhead lines is a preferred approach. Since direct current (DC) faults are frequent in overhead lines, this study adopts the hybrid modular multilevel converter (MMC) based on half bridge sub‐module and full bridge sub‐module to ...
Shuai Cao, Wang Xiang, Liangzhong Yao, Bo Yang, Jinyu Wen   +4 more
openaire   +1 more source

Redefining Purpose: The Effect of the 2019 Business Roundtable Statement on Corporate Tax Strategies

Business Ethics, the Environment &Responsibility, EarlyView.
ABSTRACT Business Roundtable (BRT) firms have faced intense scrutiny from investors, media, and the public following their 2019 “Statement on the Purpose of a Corporation,” which marked a shift from shareholder‐centric governance to a stakeholder‐focused approach.
Sadok El Ghoul, Omrane Guedhami, Rana Jamshed   +2 more
wiley   +1 more source

Fault Ride-Through Control Strategy for Variable Speed Pumped Storage Unit with Full-Size Converter

Applied Sciences
Fault ride-through is a prerequisite for ensuring continuous operation of a variable-speed pumped storage unit with a full-size converter (FSC-VSPU) and providing support for the renewable energy and power grid.
Huabo Shi, Lijie Ding, Xueyang Zeng, Yuhong Wang, Pengyu Pan, Gang Chen, Yangtao Liu, Jianquan Liao   +7 more
doaj   +1 more source

DC fault ride‐through of MMCs for HVDC systems: a review

The Journal of Engineering, 2016
As the increasing penetration of modular multilevel converter (MMC)‐based high‐voltage direct current (HVDC) into bulky power transmission systems, the performance of MMC on dealing with DC faults, especially on temporary DC fault in overhead transmission lines, has been becoming more and more significant.
Jiabing Hu, Rong Zeng, Zhiyuan He
openaire   +1 more source