Results 31 to 40 of about 2,400,147 (293)

Conditioned emergence: a dissipative structures approach to transformation [PDF]

, 1999
This paper presents a novel framework for the management of organisational transformation, defined here as a relatively rapid transition from one archetype to another.
Aaker, Ancona, Armstrong, Bagozzi, Bagozzi, Bourgeois, Bourgeois, Bourgeois, Bourgeois, Burns, Child, Cronbach, Dess, Dess, Dess, Dess, Dess, Doty, Duncan, Enz, Finkelstein, Floyd, Fornell, Galbraith, Ginsberg, Gladstein, Govindarajan, Griffin, Grinyer, Hambrick, Hambrick, Hart, Hax, Hinings, Hrebiniak, Iaquinto, Irving, Jehn, Katz, Kim, Lawrence, Li, Miles, Miller, Miller, Miller, Milliken, Naman, Nunnally, Pelled, Porter, Porter, Porter, Priem, Ruekert, Ruekert, Rumelt, Schoonhoven, Schweiger, Sharma, Skivington, Song, Stagner, Thompson, Tjosvold, Tushman, Venkatraman, Venkatraman, Walker, West, Whitney, Wooldridge, Zajac   +72 more
core   +1 more source

Unbalanced Current Sharing Control in Islanded Low Voltage Microgrids

Energies, 2018
This paper reports a new control strategy to improve sharing of unbalanced currents in islanded LV microgrids. This technique provides fast and effective sharing of positive-, negative- and zero-sequence currents, and is the first example of zero ...
Foad Najafi, Mohsen Hamzeh, Matthias Fripp   +2 more
doaj   +1 more source

Positive and Negative Sequence Control Strategies to Maximize the Voltage Support in Resistive-Inductive Grids During Grid Faults [PDF]

, 2017
Grid faults are one of the most severe perturbations in power systems. During these extreme disturbances, the reliability of the grid is compromised and the risk of a power outage is increased.
Camacho Santiago, Antonio, Castilla Fernández, Miguel, García de Vicuña Muñoz de la Nava, José Luis, Guzmán Solà, Ramon, Miret Tomàs, Jaume   +4 more
core   +2 more sources

A computationally efficient current controller for simultaneous injection of both positive and negative sequences [PDF]

2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe), 2017
This work was supported by the Research Promotion Foundation (RPF, Cyprus, Project KOINA/SOLAR-ERA.NET/1215/06), by the Ministry of National Infrastructure Energy and Water (Israel) and the SOLAR-ERA.NET (European Union's Seventh Framework Programme). © 2017 IEEE. Personal use of this material is permitted.
Ali, Zunaib, Christofides, Nicholas, Hadjidemetriou, Lenos, Kyriakides, Elias   +3 more
openaire   +1 more source

Coordinated Control of DFIG Converters to Comply with Reactive Current Requirements in Emerging Grid Codes

Journal of Modern Power Systems and Clean Energy, 2022
The doubly-fed induction generator (DFIG) is considered to provide a low-reactance path in the negative-sequence system and naturally comply with requirements on the negative-sequence reactive current in emerging grid codes.
Yuanzhu Chang, Ilhan Kocar, Jiabing Hu, Ulas Karaagac, Ka Wing Chan, Jean Mahseredjian   +5 more
doaj   +1 more source

Optimized Hierarchical Power Oscillations Control for Distributed Generation Under Unbalanced Conditions

, 2017
Control structures have critical influences on converter-interfaced distributed generations (DG) under unbalanced conditions. Most of previous works focus on suppressing active power oscillations and ripples of DC bus voltage.
Chen, Zhe, Jin, Peng, Li, Guoqing, Li, Yang, Zhai, Xiaojuan   +4 more
core   +1 more source

Fault Analysis Method Considering Dual-Sequence Current Control of VSCs under Unbalanced Faults [PDF]

, 2018
Voltage source converters (VSCs) are able to provide both positive- and negative-sequence short circuit currents under unbalanced faults. Their short circuit responses can be significantly different from those of conventional synchronous generators. This
Jia, Jundi, Nielsen, Arne Hejde, Yang, Guangya   +2 more
core   +2 more sources

A timely switch fault ride-through method for VSC-HVDC system

电力工程技术, 2022
In order to achieve the fault through of voltage source converter-based high voltage direct current (VSC-HVDC)system during alternating current (AC) system asymmetric faults and keep stability of the impedance at steadystate, a timely switch fault ...
WANG Ke, LU Yu, DONG Yunlong, MA Xiuda, LI Gang, WANG Jiacheng   +5 more
doaj   +1 more source

Analysis of unbalanced clustered voltage and control strategy of clustered voltage balancing for cascaded H-bridge STATCOM

Journal of Modern Power Systems and Clean Energy, 2019
To explore the clustered voltage balancing mechanism of the cascaded H-bridge static synchronous compensator (STATCOM), this paper analyzes the causes of unbalanced clustered voltage. The negative-sequence current caused by the compensation of unbalanced
Yu Jin, Jianze Wang, Yiqi Liu, Xinagyu Sai, Yanchao Ji   +4 more
doaj   +1 more source

Identification and location method of asymmetric faults in coal mine power network

Gong-kuang zidonghua, 2018
Three asymmetrical faults of singe-phase grounding, singe-phase line breakage and ferroresonance in coal mine power network are easily misjudged, and existing methods hardly identify the three faults correctly.
WANG Qingliang, QIN Jie, LIU Xinru
doaj   +1 more source