This paper offers a novel topology for the implementation of a shunt STATCO
M based on a grouping of four 3-level, diode-clamped converters, switching
at line frequency and coupled to the sc system through wye/wye and wye/delt
a phase-shifting transformers. Advantages include direct voltage control th
rough the gating pattern and reduced size of de capacitor. The dominant har
monic on the sc side is the 11(th) and on the de side the 12(th). The propo
sed STATCOM call meet typical harmonic distortion requirements.