Method for improving voltage stability security in a power transmission system
First Claim
1. A method of enhancing voltage stability in a region of an electric power transmission system having a plurality of buses and a plurality of sources of reactive reserves coupled thereto, the method comprising:
- grouping the plurality of buses 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;
determining at least one interface between two neighboring voltage control areas which exhibits thereacross a difference in reactive power flow, between a first operating condition and a second operating condition of the power system, that exceeds a reactive flow threshold; and
locating at least one enhancement at the at least one interface to improve voltage stability.
2 Assignments
0 Petitions
Accused Products
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.
-
Citations
25 Claims
-
1. A method of enhancing voltage stability in a region of an electric power transmission system having a plurality of buses and a plurality of sources of reactive reserves coupled thereto, the method comprising:
-
grouping the plurality of buses 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; determining at least one interface between two neighboring voltage control areas which exhibits thereacross a difference in reactive power flow, between a first operating condition and a second operating condition of the power system, that exceeds a reactive flow threshold; and locating at least one enhancement at the at least one interface to improve voltage stability. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A method of enhancing voltage stability in a region of an electric power transmission system having a plurality of buses and a plurality of sources of reactive reserves coupled thereto, the method comprising:
-
grouping the plurality of buses 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; determining at least one interface between two neighboring voltage control areas which exhibits thereacross a difference in reactive power loss, between a first operating condition and a second operating condition of the power system, that exceeds a reactive loss threshold; and locating at least one enhancement at the at least one interface to improve voltage stability.
-
-
7. A method of enhancing voltage stability in a region of an electric power transmission system having a plurality of buses and a plurality of sources of reactive reserves coupled thereto, the method comprising:
-
grouping the plurality of buses 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; determining at least one voltage control area which exhibits therein a difference in reactive reserves, between a first operating condition and a second operating condition of the power system, that exceeds a reactive reserve threshold; and locating at least one enhancement within the at least one voltage control area to improve voltage stability. - View Dependent Claims (8, 9, 10)
-
-
11. A method of enhancing voltage stability in a region of an electric power transmission system having a plurality of buses and a plurality of sources of reactive reserves coupled thereto, the method comprising:
-
grouping the plurality of buses 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; determining at least one voltage control area which exhibits therein a difference in reactive loss, between a first operating condition and a second operating condition of the power system, that exceeds a loss threshold; and locating at least one enhancement within the at least one voltage control area to improve voltage stability. - View Dependent Claims (12, 13, 14)
-
-
15. A method of locating enhancements for improving voltage stability in a region of an electric power transmission system having a plurality of buses and a plurality of sources of reactive reserves coupled thereto, the method comprising:
-
grouping the plurality of buses 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; determining a first voltage control area for locating a first enhancement to improve voltage stability, wherein the first voltage control area exhibits therein a difference in reactive loss, between a first pair of operating conditions of the power system, that exceeds a loss threshold; and determining a second voltage control area for locating a second enhancement to improve voltage stability, wherein the second voltage control area exhibits therein a difference in reactive reserves, between a second pair of operating conditions of the power system, that exceeds a reactive reserve threshold. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
-
Specification