EVALUATING THE IMPACT OF DISTRIBUTED GENERATION  ON POWER LOSSES IN RADIAL DISTRIBUTION GRIDS  USING TWO APPROXIMATION MODELS: A COMPARISON

Đỗ Quang Duy; Phạm Năng Văn

doi:10.34238/tnu-jst.5080

EVALUATING THE IMPACT OF DISTRIBUTED GENERATION ON POWER LOSSES IN RADIAL DISTRIBUTION GRIDS USING TWO APPROXIMATION MODELS: A COMPARISON

About this article

Received: 24/09/21 Revised: 05/11/21 Published: 08/11/21

Authors

1. Do Quang Duy, Hanoi University of Science and Technology
2. Pham Nang Van , Hanoi University of Science and Technology

Abstract

This paper presents linear approximation and quadratic approximation models to calculate the power loss in radial distribution grids due to the influence of Distributed Generation. Power loss is expressed as a first-degree function of Distributed Generation output using the power loss sensitivity factors in the linear approximation model. For the quadratic approximation model, power loss is given as a quadratic function of Distributed Generation output. Coefficients of quadratic and linear approximation approaches are both determined from an initial power flow. A six-bus distribution system is employed to evaluate the impact of Distributed Generation on power loss using the above two models. At the same time, the calculated results from these two models are also compared with those of the precise non-linear power flow method. The comparison reveals that the quadratic approximation model is more accurate than the linear approximation model. The quadratic approximation model, therefore, can be exploited to compute power loss of distribution power grids swiftly.

Keywords

Distributed Generation (DG); Radial Distribution Grids; Power Loss Sensitivity Factors; Linear Approximation Model; Quadratic Approximation Model

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DOI: https://doi.org/10.34238/tnu-jst.5080

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