Study on voltage flicker mitigation due to electric arc furnace operation | |
| Author | Tapparit Modthong |
| Call Number | AIT Thesis no. ET-01-12 |
| Subject(s) | Electric furnaces Voltage regulators |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | In modem steel industry, Electric Arc Furnaces (EAFs) are widely used for iron and scarp melting. The operation of electric arc furnace cause many power quality problems such as harmonics and voltage flicker. This study focuses on mitigation of voltage flicker due to operation ofEAFs. This study examined the applicability of two techniques, namely ThyristorControlled Series Reactor (S-TCR) and Static Var Compensator (SVC) for this purpose. The simulations were based on an EAF model developed for an arc furnace at Bangkok Steel Industrials Ltd. Thailand. A simulated UIE-IEC flicker meter was used to calculate the flicker indices, namely instantaneous flicker level (IFL) and short-term flicker severity (PST) of the simulated voltage waveforms. A simulation model of S-TCR and its control system was developed. Simulation results indicated that S-TCR, which is a novel concept proposed in this study, is very effective in mitigation of voltage flicker. It was also found that used of S-TCR will not significantly raise the harmonic distortion and does not cause much degradation of the system power factor. The simulation model of the SVC and its control system was performed. The simulation results indicated that SVC was also effective in reducing flicker. It was also found that SVC requires harmonic filters for its proper operation. In addition, used of SVC can improve the system power factor to the value that nearly unity. In pure terms of the flicker mitigation, the simulation results indicated that S-TCR offers slightly better performance than SVC. However, SVC provides additional benefit of power factor improvement. |
| Year | 2001 |
| 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) | Surapong Chirarattananon ; |
| Examination Committee(s) | Rajapakse, Athula;Weerakorn Ongsakul ;Singh, Sri Niwas; |
| Scholarship Donor(s) | The Royal Thai Government Fellowship ; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2001 |