02213nam a22001577a 4500999001700000100007900017100001300096245010800109260003000217300000900247500162300256700004201879856003301921942001101954952009001965  c59124d59121  aAbdul Khalique Junejoa13MPE02aSupervisor Prof. Dr. Muhammad Usman Keerio  a13MPE-02  aAnalysis about Propagation of Voltage Sag in Low Voltage Distribution Network by Using Simulink /MATLAB  aNawabshah:bQUEST,c2015.  a64p.  aABSTRACT

The power system has four stages generation, transmission, distribution and utilization. Whenever fault occurs at any stage of power system voltage profile will change in magnitude with change in phase angle. In distribution system very sensitive loadsare connected with system due to fault conditions, unbalancing in voltage occur so equipment may be burnt or damage. Fault in distribution system may leads to voltage sag in system, it is big issue of power quality, to analysis of voltage sag on different fault type and transformer winding connections  is very.
essential to ensure the power quality.
This research how the analysis of voltage sags when different fault occur in distribution y tern, there are two types of faults symmetrical and unsymmetrical so voltage ag has al o two types symmetrical and unsymmetrical.  In distribution system transformer is one of the important machine to raise or down the voltage, in distribution transformer has different winding connections so voltage sag due to faults can propagate from primary of transformer to secondary of transformer depends upon the fault type and winding connections of transformer.
In this thesis after analysis of voltage sags it has found that when zero sequence
components are not involved then same voltage sag will propagation takes place at primary of transformer to secondary of transformer. In this thesis it is also analysis that voltage sage propagation depends on fault types and winding connection of transformer .This research results are helpful for design of adaptive protection and
voltage controller for power system.


  aDepartment of Electrical Engineering   uhttps://tinyurl.com/yc72h89m  cTHESIS  00104070aRESEARCHbRESEARCHd2018-09-26l0pMP/25-272r2018-09-26 00:00:00yTHESIS