METHOD FOR BALANCING THE INTERMEDIATE CIRCUIT VOLTAGES IN A SELF-GUIDED, MULTI-LEVEL BLIND CURRENT COMPENSATOR AND SELF-GUIDED, MULTI-LEVEL BLIND CURRENT COMPENSATOR

申请公布号：WO2010086239(A2)

申请号：WO2010EP50465

申请日期：2010.01.15

申请公布日期：2010.08.05

申请人：

SIEMENS AKTIENGESELLSCHAFT;MUENCH, PHILIPP;TUTTAS, CHRISTIAN

发明人：MUENCH, PHILIPP;TUTTAS, CHRISTIAN

分类号：H02J3/18

主分类号：H02J3/18

摘要：The invention relates to a method for balancing the intermediate circuit voltages (u d l to u dn ) in a self-guided, multi-level blind current compensator (1) with a plurality of multi-quadrant rectifiers (2a to 2n) connected in series, wherein each multi-quadrant rectifier (2a to 2n) applies a pulse width modulated voltage that is made up of an equal portion (u v l to u vn ) of compensator voltage (u k ) imprinting the blind current (i k ) and an additional mains-frequency balancing voltage (u b ) having selectable amplitude. The sum of all balancing voltages (u b ) is thus zero and every balancing voltage (u b ) lies in phase or counter-phase to the fundamental oscillation of the blind current (i k ), dependent on whether the measured intermediate circuit voltage (u dl to u dn ) of the multi-quadrant rectifier (2a to 2n) is smaller or larger than a reference value (formula (I)) formed from the intermediate circuit voltages (u dl to u dn ). The invention also relates to a multi-level blind current compensator.

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