| Author | Mayura Watananont |
| Call Number | AIT Thesis no.ET-08-01 |
| Subject(s) | Electric power distribution--Thailand
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| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Energy |
| Publisher | Asian Institute of Technology |
| Abstract | Nowadays, economic growth in Thailand is quite fast. The requirement of energy consumption and electricity consumption are increased in high rate. The utilities have to raise their resources to support this growth. Fortunately in the electricity market, the small power producers are allowed to interconnect and sell power to the grid. This can help the utility to delay the big project of new power plant. But the interconnection of small power producers or DGs can affect to several points of view of the power system. The care investigation on every portion of the impact of DGs to the distribution system is required. Basically, the utilities (EGAT, MEA and PEA) have some regulation to prove the interconnection of DGs but normally they are not included the power quality issues. This study presents the investigation of impact of DGs on different categories of power quality issues in both positive and negative ones. The different energy conversion technologies are studied. Different energy conversion can contribute different power quality issues and it is found that the impact related to voltage profile rising is positive impact of DG on power quality. The significant negative impact of DG is waveform distortion. All types of DG is possible in feed harmonic to the distribution system. The deeper study is implemented on the influence of DG on voltage sag. With this power quality issue, the simulation is done by using the primary distribution system of PEA as the case study. The study focuses on the influence of synchronous generator due to the enlarged uses in the industrial field. The simulation of investigation impact of DG on voltage sag is modeled by PSCAD/EMTDC commercial software which used in the system analysis of PEA. According to the DG can improve the voltage remaining magnitude or voltage sag magnitude during disturbance. The voltage sag analysis expresses the voltage sag frequency and it is useful for both utilities and end-users to plan to handle the voltage sag problem. The results also show the benefit of DG interconnection to the grid in term of improvement power quality. However, it should be noted that the duration of voltage sag should be investigated in addition to get more accuracy analysis. The other energy conversion technologies such as induction generator and inverter-based generator are not studied in this work. |
| Year | 2008 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Energy Technology (ET) |
| Chairperson(s) | Nadarajah, Mithulananthan; |
| Examination Committee(s) | Shrestha, Ram M.;Weerakorn Ongsakul; |
| Scholarship Donor(s) | Queen Sirikit HRD Project;Asian Institute of Technology Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2008 |