Download Line Loss Minimization in Isolated Substations

Line Loss Minimization in Isolated Substations and Multiple Loop
Distribution Systems Using the UPFC
Abstract
This term paper nears the line loss minimum situation in isolated substations and
same substation multiple loop distribution systems by using the unified power flow controller
(UPFC).In each case, the mathematical model is presented and the line loss minimum conditions
are attained based on the line parameters of the distribution feeders. Since multiple loop
distribution system is fed from same substation, the line loss minimization can be reached by
compensating the summation of the line reactance voltage drop. In an isolated substation loop
distribution system, the line loss minimization can be achieved by compensating the summation
of the line reactance voltage drop in addition to the voltage difference of the substations.
Existing method:
The available technique for controlling all load voltages to be within the acceptable
voltage range under line loss minimum condition by controlling both the load voltage magnitude
and phase angle to follow reference values. The reference load phase angle was calculated from
the line loss minimum condition, whereas the reference voltage magnitude was calculated based
on the voltage magnitude of each load in the loop system. Line loss minimization can be
achieved if the loop current is eliminated from the loop system. This clause can be achieved if, at
least, the line parameters of all loop lines have the same ratio between the resistance and
inductance. This can be realized in the same substation loop distribution system since it has only
one substation for the whole loop, whereas in an isolated substations loop system this condition
cannot be realized due to the voltage difference between them, which may result from small
difference in the magnitude or phase angle.
Proposed method:
In this dissertation the mathematical model of the isolated substations and the same substation
multiple loop distribution system is presented. Also, the line loss minimum condition is
Further Details Contact: A Vinay 9030333433, 08772261612
Email: [email protected] | www.takeoffprojects.com
investigated by using the UPFC in both loop systems. The UPFC shunt converter is used to
regulate the dc-link voltage, whereas the series converter is used to control the power flow in
order to achieve line loss minimum condition. Since the series converter performs the main
function of the UPFC, its proposed control plans in both cases are presented.
Block diagram:
Model of the isolated substations loop distribution system
This project developed in Matlab/simlink soft ware and the results have been studied.
Advantages:
1) This paper has presented the line loss minimum condition and the power flow control schemes
of the UPFC to realize line loss minimization in the isolated substations and the same substation
multiple loop distribution systems, along with a detailed mathematical analysis of both systems.
2) The UPFC shunt converter is used to regulate the dc-link voltage, whereas the series converter
is used to control the power flow in order to achieve line loss minimum condition.
Applications:
1) Line loss minimization in distribution systems is the most efficient solution in order to achieve
energy saving.
2) In addition, line loss minimization enhances the voltage profile along the distribution feeders.
3) Distribution networks are mainly in radial and loop systems.
Further Details Contact: A Vinay 9030333433, 08772261612
Email: [email protected] | www.takeoffprojects.com