Voltages stability assessment of DFIG wind turbines in different control modes | |
| Author | Chanokwan Veerasathian |
| Call Number | AIT Thesis no.ET-14-11 |
| Subject(s) | Wind turbines--Control Wind turbines--Evaluation |
| 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 | Integrating wind power generation has direct impacts on a distribution network such as power quality, reliability, loss, and voltage profile problems. Thus, a high penetration level of wind power generation is a significant challenge to the traditional system operation on voltage stability. In this thesis, a method to study the impact of doubly-fed induction generator (DFIG) wind turbines for fixed voltage control and power factor control modes is proposed. The thesis considers on load tap change(OLTC) transformer and over excitation limiter (OEL) of synchronous generator along with static and dynamic loads. The feeder number 7 of Bumnengnarong substation of Provincial Electricity Authority (PEA) of Thailand is used for real time simulation. The impacts of different control modes of DFIG and different fault positions are compared. Test results indicate that OLTC transfer and OEL can improve bus voltage and voltage stability margin of the power system. Furthermore, voltage control mode of DFIG can better regulate bus voltage and increase stability margin than power factor control mode. Short-circuit current and bus voltage are evaluated for three-phase to ground fault at point of common coupling (PCC) in DFIG’ power factor control mode. Test results show that when DFIG is connected, the magnitude short-circuit current is higher than the one without DFIG connected. Therefore, there is an increase 59.10% the interrupted capacity (IC) rating of protection devices in case of DFIG integration to maintain the system stability. |
| Year | 2014 |
| 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) | Weerakorn Ongsakul |
| Examination Committee(s) | Singh, Jai Govind;Dhakal, Shobhakar |
| Scholarship Donor(s) | PEA;Asian Institute of Technology Education Cooperation Project;Asian Institute of Technology Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2014 |