Balanced Operation of a Three-phase Self-excited Induction Generator Supplying a Single-phase Load

• Main Authors: Ming-Hsueh Lee, 李明學
• Other Authors: Yaw-Juen Wang
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/32699396242487093819

博士 === 國立雲林科技大學 === 工程科技研究所博士班 === 101 === When a three-phase induction generator (IG) supplies unbalanced loads, its terminal voltages and line currents are also unbalanced, which may cause the IG to overheat and need to be derated. A single-phase loaded self-excited induction generator (SEIG) works under most unfavorable load unbalance conditions. This thesis proposes a three-capacitor circuit scheme and a method to find the values of the self-excitation capacitors that allow the SEIG to be balanced. The SEIG is modeled by a two-port network equivalent circuit that resolves the SEIG into its positive- and negative-sequence circuits associated with the self-excitation capacitors and the load. Successful results for balancing the SEIG supplying a single-phase load have been achieved by properly choosing the values of the excitation capacitors. With the aid of EMTP /ATP-Draw, the dynamic characteristic of the SEIG supplying a single-phase load is simulated the calculated and simulated results are in good agreement with each other. Finally, experimental results carried out using a 0.5 hp SEIG confirm the feasibility and validity of the theoretical modeling and EMTP /ATP-Draw simulation.