Pathatai Dharmasaroj <br/><br/>
Impact of solar PV penetration on harmonic and flicker problems and their mitigation in the distribution system 

 - Pathum Thani, Thailand :  Asian Institute of Technology,  2014 
 - 56 leaves :  ill.  +  1 online resource 
 - Thesis ;  no. ET-14-15 .
 - Asian Institute of Technology.  Thesis ;  no. ET-14-15 .
<br/><br/> A thesis submitted in partial fulfillment of the requirements for the Degree of Master of Engineering in Energy 
<br/><br/>Thesis (M.Eng.) - Asian Institute of Technology, 2014 
<br/><br/> Grid connected solar PV system may cause power quality problems in distribution system  namely  power  output  fluctuation, over  and  under  voltage,  harmonic,  and  frequency  variation. In  the  fact  that  power  output  of  solar  PV  depends upon  solar  radiation  characteristic  and  ambient  temperature.  For  example,  in  one  day,  solar  radiation  is  uncertainty  so  the  output  voltage  is  also  variation.  Moreover,  the  power  electronic  applications  interface between solar PV  and power grid  is  an other effect which introduced power quality  problems  into distribution system. Mae Sariang  microgrid is a pilot project  of PEA which consists of diesel generator, micro hydro generator, and solar PV generator.  Previously, 1 MW  solar  PV  generator  was  installed  in  this  system  that  caused  harmonic  and  flicker  problems.  Therefore,  It  is  interesting  to  study  the  impact  of  solar  PV penetration  on  harmonic  and  flicker  problems  in MSR microgrid system  and  how  to  mitigate  those  problems..  The  prediction  trends  of  harmonic  and  flicker  problems  were  based on the simulation result of the solar PV penetration from 1 to 10 MW. In addition,  the  DSTATCOM  installation  is  proposed  to compensate  the  reactive  power  and  voltage  variation  due  to  power  quality  problems. This  study  describes  the  simulation  results  obtained by  using PowerFactory  software.  The  simulation results of this  analysis  propose that  the  increasing  capacity  of  solar  PV generation  introduced slightly  decline  of  total  harmonic  distortion  trend.  On  the  other hand,  trend  of  voltage  flicker gradually rise.  Therefore,  the  increasing  size  of  solar  PV  installation  in  distribution  network  helps  to  improve  harmonic but  doesnt  enhance  voltage  quality  problem.  Furthermore, after  DSTATCOM installation, both harmonic and flicker problems was mitigated. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Photovoltaic power systems--Thailand<br/>Electric power systems--Thailand