Unbalanced three phase load flow programming using Matlab
Unbalanced three phase load flow programming using Matlab
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Date
2014-04-24
Authors
MOHAMMED, MUEIN
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Abstract
Electric utility industry is undergoing dramatic changes due to
privatization, deregulation and competition in electricity markets in many
leading countries. As a consequence, increasing wheeling transactions lead
to a growing demand of transfer capabilities. In this new environment, a
demand for flexible power flow control is becoming a technical need
because the increase in the level of risk and uncertainty associated with
transmission operation and investment.
The goal of this project is a derivation of a mathematical model of
unbalance (three-phase) load-flow of electric systems. The proposed model
is suitable for active and reactive power flow control in transmission
networks operating under either balanced or unbalanced conditions. An
existing Decoupled NR (Newton-Raphson) based three-phase power flow
program has been upgraded to include the proposed model. The power flow
equations pertaining to power network are solved in a unified single-frame
of reference leading a very good iterative solution. In this unified solution,
nodal voltage state variables (voltage magnitudes and angles) are computed
simultaneously through the iterative process. Hence, the algorithm exhibits
quadratic convergence characteristic regardless of the network size.
Validation of the proposed model is carried out in a benchmark network
operating under balanced conditions. Matlab is used as a powerful tool to
write the code which its algorithm is presented later.Electric utility industry is undergoing dramatic changes due to
privatization, deregulation and competition in electricity markets in many
leading countries. As a consequence, increasing wheeling transactions lead
to a growing demand of transfer capabilities. In this new environment, a
demand for flexible power flow control is becoming a technical need
because the increase in the level of risk and uncertainty associated with
transmission operation and investment.
The goal of this project is a derivation of a mathematical model of
unbalance (three-phase) load-flow of electric systems. The proposed model
is suitable for active and reactive power flow control in transmission
networks operating under either balanced or unbalanced conditions. An
existing Decoupled NR (Newton-Raphson) based three-phase power flow
program has been upgraded to include the proposed model. The power flow
equations pertaining to power network are solved in a unified single-frame
of reference leading a very good iterative solution. In this unified solution,
nodal voltage state variables (voltage magnitudes and angles) are computed
simultaneously through the iterative process. Hence, the algorithm exhibits
quadratic convergence characteristic regardless of the network size.
Validation of the proposed model is carried out in a benchmark network
operating under balanced conditions. Matlab is used as a powerful tool to
write the code which its algorithm is presented later.
Description
The goal of this project is a derivation of a mathematical model of
unbalanced (three-phase) load-flow of electric systems.
Keywords
Unbalanced,three,phase,load,flow,programming,using,Matlab,
University,Khartoum