Boots – shoes – and leggings
Patent
1996-02-22
1997-03-11
Trammell, James P.
Boots, shoes, and leggings
364495, 323205, G01R 2500
Patent
active
056108346
ABSTRACT:
A method of locating enhancements for improving voltage stability security of an electric power transmission system having a plurality of buses and a plurality of sources of reactive reserves coupled thereto. The plurality of buses are grouped into a plurality of voltage control areas such that each of the buses within each voltage control area has a similar corresponding reactive power versus voltage relationship. A first voltage control area is determined for locating a first enhancement, wherein the first voltage control area exhibits therein a difference in internal reactive loss that exceeds a loss threshold. A second voltage control area is determined for locating a second enhancement, wherein the second voltage control area exhibits therein a difference in reactive reserves that exceeds a reactive reserve threshold. The first and second enhancements may include switchable shunt capacitors, synchronous voltage condensers, static var compensators, or a combination thereof. A third enhancement, which includes series capacitors, parallel lines, or a combination thereof, is located at interfaces between two neighboring voltage control areas determined to exhibit thereacross a difference in either reactive power flow or reactive power loss that exceeds a predetermined threshold.
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Assouad Patrick J.
Michigan State University
Trammell James P.
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