Results 221 to 230 of about 41,335 (264)

Operational Problems in the Arctic Islands

Journal of Canadian Petroleum Technology, 1962
Abstract Geological exploration on the Arctic Islands encounters many operationalproblems that are new to most Canadian geologists. Although conditions aresimilar to those of the tundra on the northern Mainland, climatic andphysiographic differences impose modifications in transportation to the field, in planned ...
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Universal application of synchronous islanded operation

CIRED Seminar 2008: SmartGrids for Distribution, 2008
Synchronous islanded operation keeps an islanded system in synchronism with the main power system while not being electrically connected. The challenges associated with the multiple-set application are considered in this paper.
Best, Robert, Morrow, D. John, Laverty, David, Crossley, Peter   +3 more
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Decentralized Method for Islanded Operation Mode

2021
In series-type microgrid, the synchronization and power balance of distributed generators become two new issues that need to be addressed urgently. To that end, an f − P∕Q droop control is firstly introduced in this chapter, which is capable to achieve power balance under both resistive-inductive and resistive-capacitive loads autonomously.
Sun, Yao, Hou, Xiaochao, Lu, Jinghang, Liu, Zhangjie, Su, Mei, M. Guerrero, Joseph; id_orcid 0000-0001-5236-4592   +5 more
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Unified Grid-Connected and Islanded Operation

2021
In order to ensure the uninterrupted power supply, it is necessary for microgrid to operate in both grid-connected mode and islanded mode. To address this concern, this chapter introduces a unified decentralized control strategy for both grid-connected and islanded operation of the series-type microgrid (CMG).
Sun, Yao, Hou, Xiaochao, Lu, Jinghang, Liu, Zhangjie, Su, Mei, M. Guerrero, Joseph; id_orcid 0000-0001-5236-4592   +5 more
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Co-Operation in Island Biogeography

2000
In this chapter I discuss another example of co-operation of holistic and reductionistic research programmes in ecology.1 The example concerns some developments in island biogeography, a branch of ecology dealing with the distribution and abundance of species on islands.
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Rotated Island Graft Operation for Pterygium

American Journal of Ophthalmology, 1926
This operation isolates the bulk of the pterygium by four incisions. Sutures are introduced in such a way as when tightened to rotate the isolated square 90 degrees. It is fixed in position with the help of additional sutures if needed. The operation is applicable only to exceptionally severe cases, which may have not been corrected by other operations.
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Operational Lessons of the Line Islands Experiment

1967
This report reproduces the introspective review meeting about operational lessons learned from the Line Islands experiment that took place during March and April 1967. Observation groups on land, by air, and by sea, collaboratively collected one of the most comprehensive sets of meteorological data ever obtained in the tropics. Because the Line Islands
National Center for Atmospheric Research, Pineapple Research Institute of Hawaii, University Corporation for Atmospheric Research   +2 more
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Bathurst Island Group and Byam Martin Island, Arctic Canada (operation Bathurst Island)

1972
The Bathurst Island group, and Byam Martin Island, together occupy about 8,000 square miles of land area. They are situated near the geographic center of the Canadian Arctic Archipelago and encompass the north magnetic pole. Most of the area is covered by sedimentary rocks of Ordovician to Late Devonian age, with a composite exposed thickness of ...
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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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scientific co‐operation in the Aleutian Islands

Eos, Transactions American Geophysical Union, 1926
The topic for the symposium was suggested by the immediate prospect of the founding of a volcano observatory in the Aleutian Range under the United States Geological Survey. The Aleutians are difficult of access and remain but little more explored than when Alaska was first acquired.
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