Method and apparatus for determining actual reactive capability curves
First Claim
1. A method of determining a reactive capability curve of a generator, wherein the reactive capability curve includes a plurality of transitional power factors as functions of a plurality of heat input levels, the method comprising:
- operating the generator at each of the plurality of heat input levels;
determining the plurality of transitional power factors for the generator, each of the plurality of transitional power factors corresponding to at least one of the plurality of heat input levels; and
determining the reactive capability curve using the plurality of transitional power factors.
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Abstract
A system for generating updated reactive capability curves of a generator operates the generator at a number of operating load levels and at a number of different power factors to collect data regarding the real and reactive power generated at each of the various operating load levels and power factors. Subsequently, the system analyzes the collected data to determine an actual reactive capability curve of the generator. The system also provides generator health monitoring and identifies changes and trends in the capability curves of the generator. The updated reactive capability curves may be used by an economic dispatch program in determining optimum MW and MVAR setpoints for the generator.
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Citations
20 Claims
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1. A method of determining a reactive capability curve of a generator, wherein the reactive capability curve includes a plurality of transitional power factors as functions of a plurality of heat input levels, the method comprising:
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operating the generator at each of the plurality of heat input levels;
determining the plurality of transitional power factors for the generator, each of the plurality of transitional power factors corresponding to at least one of the plurality of heat input levels; and
determining the reactive capability curve using the plurality of transitional power factors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of determining a transitional operating point of a generator, the transitional operating point corresponding to a particular load level, the method comprising:
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setting the operating point of the generator to the particular load level;
setting the operating power factor of the generator close to one;
measuring total power of the generator;
incrementally decreasing the operating power factor of the generator and measuring incremental change in the total power of the generator;
comparing the incremental change in the total power of the generator to a threshold; and
if the incremental change is greater than the threshold, storing the operating power factor as the transitional operating power factor at the particular load level. - View Dependent Claims (10, 11, 12, 13)
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14. A reactive capability curve estimation system for determining a reactive capability curve of a generator, wherein the reactive capability curve includes a plurality of transitional power factors as a functions of a plurality of heat level inputs, the system comprising:
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a computer processor communicatively connected to the generator;
a computer readable memory;
a first routine stored on the computer readable memory and adapted to be operable on the computer processor to operate the generator at each of the plurality of heat input levels;
a second routine stored on the computer readable memory and adapted to be operable on the computer processor to determine the plurality of transitional power factors for the generator;
each of the plurality of power factors corresponding to at least one of the plurality of heat input levels; and
a third routine stored on the computer readable memory and adapted to be operable on the computer processor to determine the reactive capability curve using the plurality of transitional power factors. - View Dependent Claims (15, 16, 17, 18, 20)
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19. A system of claim 19, further comprising a fourth routine stored in the computer readable memory and adapted to be operable on the computer processor to use the reactive capability curve in an economic dispatch program used to allocate a power demand to the generator.
Specification