A new method for redundancy analysis of measurements applied to three-phase state estimation |
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Authors: | Madson C de Almeida Eduardo N Asada Ariovaldo V Garcia |
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Affiliation: | 1. Av. Albert Einstein, 400, 13083-852 Campinas, SP, Brazil;2. Av. Trabalhador São-carlense, 400, 13566-590 São Carlos, SP, Brazil |
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Abstract: | In this paper, a new method based on the properties of the Gram matrix is proposed to verify the redundancy of measurements in three-phase state estimation. The Gram matrix is constructed using rows of the measurement Jacobian matrix as vectors. The method can be used for measurement systems planning or updating of three-phase networks so that the overall system remain observable even under possible branch contingencies and loss of measurements. It is a fast and robust numerical method based on the Gram matrix factorization that is easy to implement. A small numerical example that shows the application of the method is presented. |
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Keywords: | Observability analysis Three-phase system Measurement redundancy |
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