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US 12,665,423 B2Granted
Systems and methods for AC optimal power flow modeling for unbalanced distribution systems
AssigneeArizona Board of Regents on behalf of Arizona State University
InventorsMojdeh Hedman, Zahra Soltani
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Abstract
A system and associated method models behavior of an unbalanced distribution system using a current-voltage (IVACOPF) formulation. Untransposed distribution lines, shunt elements of distribution lines, and detailed representation of distribution transformers and DERs are modeled. The system provides detailed modeling of distribution system including mutual impedances, shunt elements, 3-phase to 1-phase lines. The model has multiple applications for distribution system management, planning, and operation.
Claims20
A system, comprising:
- a processor in communication with a memory, the memory including instructions executable by the processor to:
- access state data descriptive of a state of an unbalanced distribution network;
- identify one or more unknown parameters of a plurality of parameters of the unbalanced distribution network based on the state data;
- and
- evaluate, based on the state data, a value of the one or more unknown parameters of the unbalanced distribution network using an objective function constrained by a set of unbalanced distribution network constraints that collectively model operation of the unbalanced distribution network, the set of unbalanced distribution network constraints incorporating, for a three-phase distribution line of the unbalanced distribution network that is connected to a first bus of a plurality of buses of the unbalanced distribution network:
- a mutual current coupling, a mutual voltage coupling, and resultant line power losses within each phase and between each respective phase of the three-phase distribution line;
- and
- a shunt admittance impact within each phase and between each respective phase of the three-phase distribution line.
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A method, comprising:
- accessing state data descriptive of a state of an unbalanced distribution network;
- identifying one or more unknown parameters of a plurality of parameters of the unbalanced distribution network based on the state data;
- and
- evaluating, based on the state data, a value of the one or more unknown parameters of the unbalanced distribution network using an objective function constrained by a set of unbalanced distribution network constraints that collectively model operation of the unbalanced distribution network, the set of unbalanced distribution network constraints incorporating, for a three-phase distribution line of the unbalanced distribution network that is connected to a first bus of a plurality of buses of the unbalanced distribution network:
- a mutual current coupling, a mutual voltage coupling, and resultant line power losses within each phase and between each respective phase of the three-phase distribution line;
- and
- a shunt admittance impact within each phase and between each respective phase of the three-phase distribution line.
4 more elements
Dependencies are inferred from the claim text.