State Estimation of Power Systems Decomposed Into Two or More Subsystems
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United States of America Patent
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Issued Date -
Mar 5, 2015
app pub date -
Sep 4, 2013
filing date -
Sep 4, 2013
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Abandoned
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Abstract
A power system grid is decomposed into several parts and decomposed state estimation steps are executed separately, using Lagrangian relaxation and blockwise Gauss-Seidel solution. The achieved solution is the same that would be achieved with a simultaneous state estimation approach. With the disclosed approach, the state estimation problem can be distributed among decomposed estimation operations for each subsystem, where the decomposed estimation operations coordinate with one another to yield the complete state estimate. The approach is particularly suited for estimating the state of power systems that are naturally decomposed into separate subsystems, such as separate AC and HVDC systems, and/or separate transmission and distribution systems.
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