Software for computation of power losses in unbalanced and harmonic polluted industrial electric networks

Mircea Chindris, Andrei Cziker, and Anca Miron, Technical University of Cluj – Napoca, Romania, Power Systems Dept.

Keywords

industrial electrical networks, power losses, harmonic pollution, unbalance, software product

Abstract

The electromagnetic phenomena in the industrial electric power networks have reached a level of complexity so high that their accurate knowledge has imposed the developing of complex software products, including expert systems, which can satisfy these expectations.

Particularly, the unbalanced and non-sinusoidal working conditions have a negative impact on both individual components of the electrical system and the whole system. The knowledge of distribution losses, which depend on the technical and operation characteristics of the electric network and on the distortion and unbalance degree of the current and/or voltage waveforms, is necessary in order to establish the network parameters and working state. Power losses calculus allows setting the electrical energy distribution cost, estimating the efficiency of the losses reduction solutions, etc.

Looking for computation of power losses in the industrial electric networks, taking into account the necessity of making complex mathematic calculations and considering the number of parameters that influence these power losses during an unbalanced and non-sinusoidal state, the authors have developed an original software tool which satisfies this goal, and quickly provides accurate results.

The paper presents this software, by describing its methodology and the mathematic equations that have been used to determine the electric power losses for radial electric networks working in unbalanced and harmonic polluted conditions.