Dynamic behavior of a single-phase self-excited induction generator using a three-phase machine feeding single-phase dynamic load |
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| Affiliation: | 1. Department of Electrical Engineering, National Institute of Technology, Durgapur 713 209, India;2. Department of Electrical Engineering, Indian Institute of Technology, Roorkee 247 667, India;3. Alternate Hydro Energy Centre, Indian Institute of Technology, Roorkee 247 667, India;1. Domel, d.o.o., Otoki 21, 4228 ?elezniki, Slovenia;2. Faculty of Mechanical Engineering, University of Ljubljana, A?ker?eva 6, 1000 Ljubljana, Slovenia;1. Group for Advanced Research in Dynamic Systems (ASU-GARDS), Ain Shams University, 1 Elsarayat St., Abbaseya, 11517 Cairo, Egypt;2. Marcus Wallenberg Laboratory for Sound and Vibration Research, The Royal Institute of Technology (KTH), Teknikringen 8, 10044 Stockholm, Sweden;1. Sir Joseph Swan Centre for Energy Research, Newcastle University, Newcastle NE1 7RU, UK;2. Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai, 200240, China;3. School of Mechanical Engineering, Beijing Institute of Technology, Beijing, 100081, China;1. Dept. of Electrical & Electronics Engineering, Anna University, Chennai, India;2. Dept. of Electrical Engineering, VIT University, Chennai, India;3. Dept. of Electrical & Electronics Engineering, Sri Venkateswara College of Engineering, Chennai, India;1. Iran Grid Management Company (IGMC), Tehran, Iran;2. Shahid Beheshti University, Tehran, Iran |
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| Abstract: | This paper is motivated to analyze the transient behavior of a single-phase self-excited induction generator (SEIG) using a three-phase machine due to switching of single-phase dynamic load like induction motors. The generator consists of a three-phase star connected induction machine excited with three-capacitors and a single-phase induction motor (IM) load. The developed dynamic models of the SEIG and the motor are based on stationary reference frame d–q axes theory incorporating the effect of cross-saturation in the magnetic circuit of the machine and the equations of excitation capacitors are described by three-phase abc model. The system suffers from heavy transients during switching of induction motor and becomes unstable. These problems may be due to resonance caused by series capacitors and the inductive motor load. The use of damping resistors across one series capacitor is proposed to damp out the starting transients for the stable operation. The motor can be started up successfully using the damping resistor. The variation of the damping resistance with the increase in load on the motor after successful starting to maintain constant terminal voltage has been presented. The eigenvalue technique is also employed to examine the transient conditions in the studied SEIG-IM system. The simulated and experimental results are presented for both the unsuccessful and successful starting of the motor. These results are in close agreement with each other, which show the effectiveness of the approach. |
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