Results 41 to 50 of about 16,216,609 (215)

Dual Channel Control With DC Fault Ride Through for MMC-Based, Isolated DC/DC Converter [PDF]

IEEE Transactions on Power Delivery, 2017
This paper presents the two-channel controller with inner current loops for dual bridge, DC/DC converter, based on modular multilevel converter (MMC) technology. The DC/DC control strategy is based on two inner fast current control loops in dq rotating frame at each of the two MMC bridges. These current controls facilitate operation through dc faults
Jovcic, Dragan, Zhang, Huibin
openaire   +2 more sources

Circular Ecosystem‐Orchestrating Leadership: Microfoundations of Ecosystem‐Related Dynamic Capabilities for a Circular Economy Transition

Business Strategy and the Environment, EarlyView.
ABSTRACT The transition to a circular economy (CE) increasingly depends on circular ecosystems: networks of autonomous yet interdependent actors that must coordinate material, information, and value flows to narrow, slow, and close resource loops. This creates a governance problem: Circularity requires orchestration, yet no single actor can impose ...
Felix Carl Schultz, Vladislav Valentinov, Andrea Urbinati, Julian Kirchherr   +3 more
wiley   +1 more source

Harnessing Thin‐Film Solid‐State Electrolytes: Enabling Breakthroughs in All‐Solid‐State Batteries

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Schematic illustration highlighting the advantages of transitioning from traditional thick solid‐state electrolytes (SSEs) to thin‐film SSEs. Thinning the electrolyte enables higher ionic conductivity, reduced interfacial polarization, improved flexibility, compact electrode contact, and enhanced energy density, offering a promising pathway toward high‐
Yitao He, Haoyang Cheng, Li Wang, Xiangming He   +3 more
wiley   +1 more source

A Comprehensive Review of Fault‐Current Limiter Technologies for Smart and Resilient Power Systems

Energy Science &Engineering, EarlyView.
This review compares superconducting, solid‐state, and hybrid fault‐current limiters (FCLs) for modern alternating current, direct current, and hybrid grids. It shows that optimal FCL selection depends on fault characteristics, network configuration, voltage level, protection coordination, and resilience requirements rather than on a universally ...
Abdelrahman Farghly, Eslam Essam, Hilmy Awad, Samia Abdelfatah, Walid Issa, Abdallah M. Hamada   +5 more
wiley   +1 more source

A coordinated control approach for DC link and rotor crowbars to improve fault ride-through of DFIG based wind turbines

, 2015
The penetration levels of wind turbines (WTs) in power grid have significantly increased in the last decade. These renewable energy resources integrated with doubly fed induction generators (DFIGs) are able to provide reactive power to support power grid
Ahmed M. A. Haidar, Hagh, Mehrdad T., Kashem M. Muttaqi, Mehrdad T. Hagh, Muttaqi, Kashem M., Haidar, Ahmed M. A.   +5 more
core   +1 more source

Ride-through-fault capabilities of DFIG wind farm connected to a VSC station during a DC fault [PDF]

, 2011
This work analyzes the capabilities of ride-through-fault (RTF) of a double-fed induction machine (DFIG), -based wind farm connected to a VSC-, in case of a fault in the DC side of the VSC.
Campos-Gaona, D., Moreno-Goytia, E.L., Anaya-Lara, O., Burt, G.   +3 more
core   +4 more sources

A grid side fault ride-through control for renewable energy connected MMC-HVDC

电力工程技术
Renewable energy connected modular multilevel converter high-voltage direct-current (MMC-HVDC) system should have the capability of fault ride-through when the AC grid fails. However, it is difficult to quickly and reliably achieve fault ride-through via
Qiang HUANG, Kuan LI, Rongqi FAN, Yudun LI, Xuezheng DONG, Ke JIA   +5 more
doaj   +1 more source

Enhancing Reliable Irrigation–Water Supply in Poverty‐Ridden and Drought‐Prone Areas: Pre‐2017 Baseline Evidence From the Tawona Irrigation Scheme, Zimbabwe

Irrigation and Drainage, EarlyView.
ABSTRACT This study investigates farmers' willingness to pay for a reliable irrigation water supply in Zimbabwe's Tawona irrigation scheme, where intermittent water supply caused by funding shortages threatens irrigation sustainability. Using contingent valuation and logit regression analysis, data were collected from 313 farmers during the 2016/2017 ...
Edgar Muhoyi, Josue Mbonigaba
wiley   +1 more source

A lightweight MMC topology with recombined half‐bridge submodules for DC fault ride‐through

IET Generation, Transmission & Distribution
The lightweight of modular multilevel converter (MMC) and the DC faults ride‐through ability are main challenges for MMC‐high voltage direct current (HVDC) transmission systems.
Yutao Xu, Zhukui Tan, Jikai Li, Qihui Feng, Zhuang Wu   +4 more
doaj   +1 more source

Real‐Time Fractional Control of an Electrohydraulic System Using Low‐Cost Technology

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT Advances in control methods for electrohydraulic systems (EHS) improve performance by addressing nonlinearities and unknown parameters, although most studies are limited to numerical simulations. Furthermore, research with experimental validation often relies on high‐performance computing equipment, specialized data acquisition cards, and ...
Edgar H. Robles‐Sauceda, Felipe J. Torres, Antonio J. Balvantín‐García, Miroslava Cano‐Lara, Juan Pablo Ramírez, Israel Martínez   +5 more
wiley   +1 more source