公开(公告)号：EP3320609A1

公开(公告)日：2018-05-16

申请号：EP16736468.6

申请日：2016-07-08

Applicant: ABB Schweiz AG

Inventor： ROHR, Eduardo ,  AL-HOKAYEM, Peter ,  GEYER, Tobias

IPC: H02M1/12 ,  H02M7/217 ,  H02M7/5387 ,  H02M1/00

CPC classification number: H02M1/12 ,  H02M7/217 ,  H02M7/53873 ,  H02M2001/0012 ,  H02M2001/0038

Abstract: A method for operating an electrical converter including: determining an optimized pulse pattern from a fundamental voltage reference for the electrical converter, wherein the optimized pulse pattern is determined from a first lookup table and includes discrete voltage amplitude values changing at predefined switching instants; determining a harmonic content reference from the fundamental voltage reference based on a second lookup table, wherein the harmonic content reference is a harmonic current reference determined from the frequency spectrum of a current of the electrical converter or the harmonic content reference is a filtered voltage reference determined by applying a first order frequency filter to a voltage, which current or voltage is generated, when the optimized pulse pattern is applied to the electrical converter; determining a harmonic content error from the harmonic content reference by subtracting an estimated output voltage and/or estimated output current of the electrical converter from the harmonic content reference; modifying the optimized pulse pattern by timeshifting switching instants such that the fundamental voltage reference is tracked and the harmonic content error is corrected by the timeshifted switching instants; applying the modified optimized pulse pattern to semiconductor switches of the electrical converter.

公开(公告)号：EP3058646B1

公开(公告)日：2018-04-11

申请号：EP14780500.6

申请日：2014-10-03

Applicant: ABB Schweiz AG

Inventor： AL-HOKAYEM, Peter ,  GEYER, Tobias ,  OIKONOMOU, Nikolaos

IPC: H02M1/00 ,  H02M1/12 ,  H02P21/14 ,  H02P23/14 ,  H02M7/5387 ,  H02P21/30 ,  H02P23/30

CPC classification number: H02M1/126 ,  G05B2219/41406 ,  H02M7/53873 ,  H02M7/53875 ,  H02M2001/0003 ,  H02P21/141 ,  H02P21/30 ,  H02P23/14 ,  H02P23/30

Abstract: An electrical converter is interconnected via a filter with an electrical load or an electrical power source. A method for controlling the converter comprises the steps of: receiving a reference flux (ψ*i) for the electrical converter; determining output signals (y) comprising currents and/or voltages measured in the filter; determining an estimated flux (ψi) from the output signals (y); determining a corrective flux (ψi,damp) from the output signals (y) based on a mathematical model of the filter and a quadratic cost function; determining control input signals (u) for the electrical converter based on a sum of the estimated flux (ψi) and the corrective flux (ψi,damp); controlling the converter with the control input signals (u); and algorithmic filtering of at least one of the output signals (y) by applying a signal filter to the at least one output signal, which is designed for amplifying the at least one output signal at a resonance frequency of the filter, whereby the corrective flux (ψi,damp) is determined from the filtered output signals.