Application of State Estimation in Distribution Systems with Embedded Microgrids

Nikolaos M. Manousakis and George N. Korres
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Nikolaos M. Manousakis: Department of Electrical & Electronics Engineering, University of West Attica, 12244 Athens, Greece
George N. Korres: School of Electrical & Computer Engineering, National Technical University of Athens, 15780 Athens, Greece

Energies, 2021, vol. 14, issue 23, 1-18

Abstract: In this paper, a weighted least square (WLS) state estimation algorithm with equality constraints is proposed for smart distribution networks embedded with microgrids. Since only a limited number of real-time measurements are available at the primary or secondary substations and distributed generation sites, load estimates at unmeasured buses remote from the substations are needed to execute state estimation. The load information can be obtained by forecasted and historical data or smart real-time meters. The proposed algorithms can be applied in either grid-connected or islanded operation mode and can efficiently identify breaker status errors at the main substations and feeders, where sufficient measurement redundancy exists. The impact of the accuracy of real and pseudo-measurements on the estimated bus voltages is tested with a 55-bus distribution network including distributed generation.

Keywords: distribution system; load estimate; microgrid; network splitting problem; network topology; state estimation (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: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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