Optimizing reactive power distribution in an industrial power network
First Claim
1. A system for optimizing the costs associated with the generation and flow of reactive power in an industrial plant connected to receive power from an electrical power utility and including a plurality of electromechanical rotating machines and electrical loads connected in a network, each machine having a reactive power characteristic and an excitation element which is controllable for adjusting the reactive power generated or absorbed by the machine, said system comprising:
- means defining a model of the network for providing an indication of the quantity of reactive power to be supplied by the utility in dependence on representations of selected network electrical parameters including the reactive power generated or absorbed by each machine;
cost determining means connected to said means defining a model for receiving the indication provided by the model and providing an indication of the cost associated with reactive power flow as represented by the model;
network model parameter perturbing means connected to said model means for providing to said model means sets of representations of altered values of the quantity of reactive power generated or absorbed by each machine;
comparison means connected to said cost determining means for determining the lowest cost indication provided by said cost determining means after said model means have provided reactive power quantity indications relating to a plurality of sets of representations provided by said perturbing means; and
machine control means connected to said comparison means and to the excitation element of at least one of the rotating machines for controlling the operation of the excitation element of the at least one machine to produce or absorb the amount of reactive power indicated by said model means with respect to the set of representations for which the lowest cost indication is produced by said cost determining means.
3 Assignments
0 Petitions
Accused Products
Abstract
A system and method for optimizing the costs associated with the generation and flow of reactive power in an industrial plant connected to receive power from an electrical power utility and including a plurality of electromechanical rotating machines and electrical loads connected in a network, each machine having a reactive power characteristic and an excitation element which is controllable for adjusting the reactive power generated or absorbed by the machine. Control is achieved by: creating a model of the network for providing an indication of the reactive power to be supplied by the utility in dependence on representations of selected network electrical parameters including the reactive power generated or absorbed by each machine; providing an indication of the cost associate with reactive power flow as represented by the model; providing to the model sets of representations of altered values of reactive power generated or absorbed by each machine and causing the model to produce an indication for each set of representations; determining the lowest cost indication provided after the model has provided indications relating to a plurality of different sets of representations provided to the model; and providing an indication of the control to be effected on the excitation element of each machine to produce or absorb the amount of reactive power indicated by the model with respect to the set of representations for which the lowest cost indication is produced in the determining step.
43 Citations
10 Claims
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1. A system for optimizing the costs associated with the generation and flow of reactive power in an industrial plant connected to receive power from an electrical power utility and including a plurality of electromechanical rotating machines and electrical loads connected in a network, each machine having a reactive power characteristic and an excitation element which is controllable for adjusting the reactive power generated or absorbed by the machine, said system comprising:
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means defining a model of the network for providing an indication of the quantity of reactive power to be supplied by the utility in dependence on representations of selected network electrical parameters including the reactive power generated or absorbed by each machine; cost determining means connected to said means defining a model for receiving the indication provided by the model and providing an indication of the cost associated with reactive power flow as represented by the model; network model parameter perturbing means connected to said model means for providing to said model means sets of representations of altered values of the quantity of reactive power generated or absorbed by each machine; comparison means connected to said cost determining means for determining the lowest cost indication provided by said cost determining means after said model means have provided reactive power quantity indications relating to a plurality of sets of representations provided by said perturbing means; and machine control means connected to said comparison means and to the excitation element of at least one of the rotating machines for controlling the operation of the excitation element of the at least one machine to produce or absorb the amount of reactive power indicated by said model means with respect to the set of representations for which the lowest cost indication is produced by said cost determining means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for optimizing the costs associated with the generation and flow of reactive power in an industrial plant connected to receive power from an electrical power utility and including a plurality of electromechanical rotating machines and electrical loads connected in a network, each machine having a reactive power characteristic and an excitation element which is controllable for adjusting the reactive power generated or absorbed by the machine, said method comprising:
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creating a model of the network for providing an indication of the quantity of reactive power to be supplied by the utility in dependence on representations of selected network electrical parameters including the reactive power generated or absorbed by each machine; providing an indication of the cost associated with reactive power flow as represented by the model; providing to the model sets of representations of altered values of the quantity of reactive power generated or absorbed by each machine and causing the model to produce an indication for each set of representations; determining the lowest cost indication provided after the model has provided indications relating to a plurality of different sets of representations provided to the model; and controlling the excitation element of at least one of the machines to produce or absorb the amount of reactive power indicated by the model with respect to the set of representations for which the lowest cost reactive power quantity indication is produced in said determining step. - View Dependent Claims (10)
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Specification