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260 Power electronic equipment
Fig. 6.96 Typical passive filter based arrangement for a 12-pulse rectifier system.
Fig. 6.97 Hybrid active/passive shunt filter for 12-pulse rectifier system.
filtering arrangements, L±C tuned filters at 5th, 7th, 11th, and 13th harmonic
frequencies are employed. The 12-pulse rectifier does not generate significant 5th
and 7th harmonics. However, one cannot ignore them as resonances between passive
filter components and line impedances are likely to increase the amplitude of the
