US3683161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Computing economic power distribution in power tools
Assignee: Leeds and Northrup Co
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Filing: 1970-09-08
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Granted: 1972-08-08
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Expires: 1990-09-08
Abstract
Abstract The economic dispatch of generation in interconnected areas is computed by determining the generation which will cause the incremental cost of power at each of the interarea tie points, as calculated from the interconnected areas, to be equal at the existing load level. A computer having its own loss matrix is utilized in each area. It computes the tie point costs on the basis of cost information sent from the areas interconnected to it, and it also sends its own costs to those areas. In each area the desired generation and net tie line interchange are computed to provide a basis for controlling the area''s generation.
Inventors
- 👤 Walter O Stadlin
- 👤 Bruce F Wollenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:47
CPC Classifications
G; G06; G06Q; G06Q10/00; G06Q10/04; G06Q50/00; G06Q50/06; H; H02; H02J; H02J3/00; Y; Y02; Y02E; Y02E40/00; Y02E40/70; Y04; Y04S; Y04S10/00; Y04S10/50
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
212 words
A method of operating a computing system to compute the economic distribution of the load among the power sources in each of a group of areas interconnected for transmission of power therebetween when at least two of the areas are interconnected by a plurality of transmission lines, comprising the steps of automatically computing a first incremental cost of power at a boundary point on each tie line between each area and the areas interconnected thereto, said computation being based on the incremental costs and the incremental transmission losses in that area, automatically computing in each of the areas interconnected thereto, a second incremental cost of power at the same boundary points based on the incremental costs and the incremental transmission losses in the interconnected areas, automatically comparing for each area the first and second incremental costs calculated for each of the boundary points, and automatically computing in accordance with the results of said comparisons the magnitude of power generation required from each of the power sources and the net interarea tie line interchange for the respective areas to obtain equality between the sum of the combination of the total actual generation and interarea tie line interchange and the combination of the total desired generation and the desired computed interarea tie line interchange.
Claim 2
Independent Claim
212 words
A method of operating a computing system to compute the economic distribution of the load among the power sources in each of a group of areas interconnected for transmission of power therebetween when at least two of the areas are interconnected by a plurality of transmission lines, comprising the steps of automatically computing a first incremental cost of power at a boundary point on each tie line between each area and the areas interconnected thereto, said computation being based on the incremental costs and the incremental transmission losses in that area, automatically computing in each of the areas interconnected thereto, a second incremental cost of power at the same boundary points based on the incremental costs and the incremental transmission losses in the interconnected areas, automatically comparing for each area the first and second incremental costs calculated for each of the boundary points, and automatically computing in accordance with the results of said comparisons the magnitude of power generation required from each of the power sources and the net interarea tie line interchange for the respective areas to obtain equality between the sum of the combination of the total actual generation and interarea tie line interchange and the combination of the total desired generation and the desired computed interarea tie line interchange.
Claim 3
Dependent Claim
26 words
The method of claim 1 in which the computing system includes a computer for each of the areas to make the automatic computations for the areas.
Claim 4
Dependent Claim
21 words
The method of claim 1 in which the computing system carries out all of the automatic computations in a single computer.
Claim 5
Dependent Claim
64 words
The method of claim 2 in which the computer in each particular area sends to the computers of each of the areas to which it is interconnected a signal representative of the incremental cost of power at the boundary point of each of the individual tie lines to those interconnected areas for the existing level of incremental cost of delivered power for the area.
Claim 6
Dependent Claim
73 words
The method of claim 4 in which the computer in each particular area sends to the computer of each of the areas to which it is interconnected a signal representative of the level of power flow associated with the incremental cost sent to the interconnected areas and signals representative of the rate of change of the incremental cost at each of the tie points associated with said level of tie line power flow.
Claim 7
Independent Claim
259 words
A method of operating a computing system to compute the economic distribution of the load among the power sources in each of a group of areas interconnected for transmission of power therebetween when at least two of the areas are interconnected by a plurality of transmission lines, comprising the steps of automatically computing a first incremental cost of power at a boundary point on each tie line between each area and the areas interconnected thereto, said computation beinG based on the incremental costs and the incremental transmission losses in the area involved in computation, automatically computing in each of the areas interconnected thereto, a second incremental cost of power at the same boundary points based on the incremental costs and the incremental transmission losses in the interconnected areas, automatically comparing for each area the first and second incremental costs calculated for each of the boundary points, automatically computing from the results of said comparison the magnitude of power interchange required on each of the tie lines to obtain an economic interchange of power, automatically computing in each area an incremental cost for generating power from each source of the area, automatically computing in accordance with said last-named costs the associated desired generation for each of the sources, comparing the sum of the combined total generation and total desired tie line flow for the area with the combination of the total actual generation and the total actual tie line flow for the area, and adjusting the incremental cost of delivered power for the area to bring said sum towards zero.
Claim 8
Independent Claim
259 words
A method of operating a computing system to compute the economic distribution of the load among the power sources in each of a group of areas interconnected for transmission of power therebetween when at least two of the areas are interconnected by a plurality of transmission lines, comprising the steps of automatically computing a first incremental cost of power at a boundary point on each tie line between each area and the areas interconnected thereto, said computation beinG based on the incremental costs and the incremental transmission losses in the area involved in computation, automatically computing in each of the areas interconnected thereto, a second incremental cost of power at the same boundary points based on the incremental costs and the incremental transmission losses in the interconnected areas, automatically comparing for each area the first and second incremental costs calculated for each of the boundary points, automatically computing from the results of said comparison the magnitude of power interchange required on each of the tie lines to obtain an economic interchange of power, automatically computing in each area an incremental cost for generating power from each source of the area, automatically computing in accordance with said last-named costs the associated desired generation for each of the sources, comparing the sum of the combined total generation and total desired tie line flow for the area with the combination of the total actual generation and the total actual tie line flow for the area, and adjusting the incremental cost of delivered power for the area to bring said sum towards zero.
References Cited (Backward Citations)
US3400258A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |