Compensated Load Flow Solutions for Distribution System State Estimation

Catalina Gómez-Quiles, Esther Romero-Ramos, Antonio de la Villa-Jaén and Antonio Gómez-Expósito
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Catalina Gómez-Quiles: Department of Electrical Engineering, University of Seville, 41092 Seville, Spain
Esther Romero-Ramos: Department of Electrical Engineering, University of Seville, 41092 Seville, Spain
Antonio de la Villa-Jaén: Department of Electrical Engineering, University of Seville, 41092 Seville, Spain
Antonio Gómez-Expósito: Department of Electrical Engineering, University of Seville, 41092 Seville, Spain

Energies, 2020, vol. 13, issue 12, 1-13

Abstract: State estimation of distribution systems typically relies on measurement sets with very low redundancy levels. In this paper, this fact is exploited by first solving a conventional load flow, using exclusively a critical set of measurements, and then compensating the solution to account for the few redundant measurements available. This leads to a suboptimal but sufficiently accurate estimate. It is shown how the sparse triangular factorization of the load flow Jacobian matrix can be fully exploited throughout the compensation-based procedure, preventing in this way the ill-conditioning associated with the gain matrix arising in the conventional least-squares formulation. Simulation results are provided for measurement configurations customarily found in distribution systems, showing the potential advantages of the proposed methodology.

Keywords: state estimation; distribution systems; load flow (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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