HEAVY-POWER MULTIPHASE CONVERTER SUBSTATION Russian patent published in 2005 - IPC

FIELD: electrical engineering; heavy-current converter substations feeding aluminum electrolysis series.

SUBSTANCE: proposed substation characterized in high reliability at its equivalent rectifying phase characteristic equal to 48, 60, 72, or 96 has each of its n converters incorporating converter transformer and rectifier. All converter transformers are connected to high-voltage supply mains. Converters are available in m design alternates distinguished by absolute angle of phase shift between primary line and phase voltages of converter transformers and have 2k relatively parallel dc busways. Converters are disposed along dc busways and all rectifiers are electrically connected to these busways. Converters incorporating converter transformers having maximal absolute angle of phase shift are disposed in extreme positions and those whose converter transformers have minimal absolute angle of phase shift are arranged in middle part of multiphase converter substation, where n is number of converters, 4 ≤ n ≤ 10; 2k is number of positive and negative dc busways, 2 ≤ 2k ≤ 64; m is number of converter design alternates distinguished by absolute angle of phase shift of converter transformers.

EFFECT: improved power characteristics, including power factor and efficiency, enhanced reliability.

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