Results 171 to 180 of about 985 (211)

And They Started Sayin’ “Black Power!”

Feminist Media Histories, 2018
This photo essay attempts to map some of the historical moments that likely influenced the birth of the black panther as an icon and hero in the worlds of both political activism and comic books. From its initial appearance in Alabama to its incarnation in Oakland, the black panther has stood the test of time and remained an index of Black power.
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Black start studies for system restoration

2008 IEEE Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century, 2008
The IEEE power system stability controls subcommittee developed a panel session for the power engineering society general meeting in July 2008. One of the contributions to this panel session is presented in this paper. The objective of this paper is to describe black-start operations, to discuss the studies that should be part of a black-start planning
J.W. Feltes, Carlos Grande-Moran
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Urban network reconfiguration in black start

2006 China International Conference on Electricity Distribution (CICED 2006), 2006
The problem of urban network restoration after blackout is studyed in this paper. Considering of the inferences of transmission network restoration process to distribution network restoration, the target function and constraints of optimal algorithm for distribution network reconfiguration in black start have been presented.
null Yunhai Zhou, null Xue Wei, null Xiangyong Hu   +2 more
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Black start and islanding operations of microgrid

2019
This chapter describes different control techniques applied in microgrids (MGs) with responsive distributed energy resources (DER) for intentional and automatic islanding, deployment of a local black start strategy and including the reconnection to the upstream distribution network.
Clara Gouveia, Carlos Moreira, Andre G. Madureira, Jose Gouveia, Diego Issicaba, Joao Abel Pecas Lopes   +5 more
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A study on the black start capability of VSC-HVDC using soft-starting mode

2009 IEEE 6th International Power Electronics and Motion Control Conference, 2009
A good Black-Start scheme is important and necessary to resume power supply fast and efficiently after black out, and how to choose black-start power is the first thing to consider in the scheme. In this paper, the advantages of VSC-HVDC as black start power are analyzed.
null Mingxia Zhou, null Sheng Li, null Jianhua Zhang, null Zongqi Liu, null Yinhui Li   +4 more
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Design and research of typical black-start cases with CCHP systems as start units

2014 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC), 2014
This paper focuses on black-start of power system with turbine based combined cooling, heating and power (CCHP) systems as start units. Firstly, the relation among inrush current, the capacity of CCHP systems and transformers are researched and summarized by building models and running simulations in PSCAD.
Zhaoxia Jing, Shan Lin, Xiaodong Chen, Qinghua Wu   +3 more
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Black start generator protection considerations

2010 63rd Annual Conference for Protective Relay Engineers, 2010
Application of sound relaying principles helps prevent unwanted tripping during black starts. An unwanted trip during a black start is extremely detrimental since the utility is attempting to reconnect its high voltage grid and restore service throughout its operating region.
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A Case-Based Reasoning System for Black-start

2006 International Conference on Power System Technology, 2006
the basic strategy of case-based reasoning (CBR) is retrieving the most relevant cases and adapting them to fit new situation, and solutions would be stored for future reuse. A conceptual framework for a CBR system to scheme black-start plan is presented.
Zhou Yunhai, Hu Xiangyong
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Evaluation of Restoration Sequence of DG in Black-Start

Applied Mechanics and Materials, 2015
With the rapid expansion of the grid, how to solve the security and stability of power system has become a hot problem. As a power system after a serious accident the necessary security measures, black-start programs are expected to play an extremely important role in reducing the loss of equipment and user outage and decreasing the outage time.
Xiao Yun Huang, Fei Jin Peng, Hong Yuan Huang, Zhi Wen Xie   +3 more
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Transformer overvoltage problems and countermeasures at black start

2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491), 2004
A system of Kyushu Electric Power Company Inc. or KEPCO (about 19 GW) belongs to the western Japan system (110 GW) and has a 500-kV and 220-kV transmission line in a loop configuration. Japan's power system has high reliability and experienced no blackout for the past several decades.
T. Funakoshi, K. Furukawa, T. Kawachino, S. Takasaki, T. Shimojo, K. Hirayama, T. Sogabe, T. Shimamura, H. Hashimoto, S. Nohara   +9 more
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