A Novel Multi-Area Distribution State Estimation Approach for Active Networks

Mohammad Gholami, Ali Abbaspour Tehrani-Fard, Matti Lehtonen, Moein Moeini-Aghtaie and Mahmud Fotuhi-Firuzabad
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Mohammad Gholami: Department of Electrical Engineering, Sharif University of Technology, Azadi Ave., Tehran 15119-43943, Iran
Ali Abbaspour Tehrani-Fard: Department of Electrical Engineering, Sharif University of Technology, Azadi Ave., Tehran 15119-43943, Iran
Matti Lehtonen: Department of Electrical Engineering, Aalto University, P.O. Box 15500, 00076 Espoo, Finland
Moein Moeini-Aghtaie: Department of Energy Engineering, Sharif University of Technology, Azadi Ave., Tehran 15119-43943, Iran
Mahmud Fotuhi-Firuzabad: Department of Electrical Engineering, Sharif University of Technology, Azadi Ave., Tehran 15119-43943, Iran

Energies, 2021, vol. 14, issue 6, 1-19

Abstract: This paper presents a hierarchically distributed algorithm for the execution of distribution state estimation function in active networks equipped with some phasor measurement units. The proposed algorithm employs voltage-based state estimation in rectangular form and is well-designed for large-scale active distribution networks. For this purpose, as the first step, the distribution network is supposed to be divided into some overlapped zones and local state estimations are executed in parallel for extracting operating states of these zones. Then, using coordinators in the feeders and the substation, the estimated local voltage profiles of all zones are coordinated with the local state estimation results of their neighboring zones. In this regard, each coordinator runs a state estimation process for the border buses (overlapped buses and buses with tie-lines) of its zones and based on the results for voltage phasor of border buses, the local voltage profiles in non-border buses of its zones are modified. The performance of the proposed algorithm is tested with an active distribution network, considering different combinations of operating conditions, network topologies, network decompositions, and measurement scenarios, and the results are presented and discussed.

Keywords: active distribution networks; decentralized control strategy; multi-area state estimation; phasor measurement units; weighted least square (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 complete reference list from CitEc
Citations: View citations in EconPapers (1)

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