Resonance damping and torsional vibration issues in inverter-fed motor drive systems

• Main Author: Liang,Shijie
• Other Authors: Tang Yi
• Format: Thesis-Master by Coursework
• Language: English
• Published: Nanyang Technological University 2021
• Subjects: Engineering::Electrical and electronic engineering
• Online Access: https://hdl.handle.net/10356/152059
• Institution: Nanyang Technological University

The core module of renewable energy power generation system is grid connected inverter. LCL-based grid-connected inverter is widely valued because of its superior high frequency harmonic suppression ability. LCL-filter has better high frequency harmonic attenuation and better filtering effect, but resonance suppression should be considered. In this dissertation, the inherent damping characteristic of LCL-filters is used to improve the resonance suppression. Two-mass drive system has the problem of torsional vibration when the torsion changes instantaneously. This issue can be solved using the same method as the LCL-filters. Both systems are modeled and simulated in PLECS to find the effect of resonance suppression or torsional vibration suppression. The two systems will be compared with each other.