OPERATIONAL MEASURES BASED ON ELECTRICAL DISTANCE MATRIX APPROACH FOR MITIGATING TRANSMISSION AND DISTRIBUTION LINE OVERLOADING

Metodija, Atanasovski and Goran, Veljanovski and Pande, Popovski and Petar, Krstevski and Aleksandra, Krkoleva Matevska (2025) OPERATIONAL MEASURES BASED ON ELECTRICAL DISTANCE MATRIX APPROACH FOR MITIGATING TRANSMISSION AND DISTRIBUTION LINE OVERLOADING. B&H Electrical Engineering, 19 (2). ISSN 2566-3143

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Abstract

The time equivalent availability of maximum power for photovoltaics (PVs) is approximately 1500 h per
year, and for the wind power plants (WPPs) it is about 3000 h per year. The maximum power generation of PVs
and WPPs will occur in several hours per day depending on the season, and for the rest of the day the power will
be lower or zero. As a result, the transmission and distribution lines will be highly loaded or overloaded for the
previously mentioned specific hours, while during the rest of the year the loading will be lower. In order to overcome
the problem of unnecessary reinforcement of lines, this paper proposes less costly operational measures using
load and generation flexibility based on electrical distance. According to the Zbus matrix allocation method, the
complex power flow of each branch j-k can be expressed as a function of the voltage at node j and the current
injections at each node. The electrical distance coefficient matrix represents the electrical distance of the bus i
from the branch j-k and it measures the impact of the bus injection on the branch j-k complex power flow. Namely,
higher value of electrical distance coefficient means higher impact of the bus i injection on the power flow. The
proposed algorithm in this paper uses the electrical distance and load flexibility or generation re-dispatch for
solving the overloads in the network. Firstly, power flow is solved, which enables to detect the overloads in the
network. After that, the Zbus matrix and the electrical coefficients matrix are calculated. We are observing the row
of electrical distance coefficient matrix that corresponds to the overloaded branch(es). The maximum electrical
coefficient is detected in that row and load or generator in the corresponding bus is scaled (+ or -) appropriately
to solve the overloading(s). The proposed methodology will be tested on distribution and transmission network.
The results will be presented and discussed.

Item Type:	Article
Subjects:	Scientific Fields (Frascati) > Engineering and Technology > Electrical engineering, electronic engineering,information engineering
Divisions:	Faculty of Technical Sciences
Depositing User:	Prof. d-r. Metodija Atanasovski
Date Deposited:	14 Feb 2026 13:49
Last Modified:	14 Feb 2026 13:49
URI:	https://eprints.uklo.edu.mk/id/eprint/11357

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