| This thesis offers a novel topology for the implementation of a shunt STATCOM based on a grouping of four 3-level, diode-clamped converters, switching at line frequency and coupled to the ac system through wye/wye and wye/delta phase-shifting transformers.;The advantages include direct voltage control through the gating pattern and the reduced size of the do capacitor. The dominant harmonic on the ac side is the 11th and on the do side, the 12th. The proposed STATCOM can meet Total Harmonic Distortion (THD) requirements.;The operation principles of the proposed STATCOM are described. Harmonics management on both ac side and do side is explained. The concepts in this thesis have been proven by power system simulation software, PSCAD/EMTDC. |
