公开(公告)号：US10530275B2

公开(公告)日：2020-01-07

申请号：US16342440

申请日：2016-10-21

Applicant: ABB SCHWEIZ AG

Inventor： Michail Vasiladiotis ,  Alexandre Christe ,  Tobias Geyer

IPC: H02M7/5387 ,  H02M1/12 ,  H02M7/483

Abstract: In a method of controlling a DC-to-AC Modular Multilevel Converter (MMC) having a three-phase AC side connected to a three-phase AC network and having a DC side connected to a DC network, the MMC has a double-star topology with a plurality of phase-legs. Each phase-leg has a first branch and a second branch. Each of the first and second branches includes a plurality of series connected converter cells. The method includes obtaining an Optimized Pulse Pattern (OPP) for the MMC. The method also includes adapting the OPP to the MMC by means of closed-loop pulse pattern control. The method also includes, based on the adapted OPP, sending firing signals to the plurality of cells of each branch.

公开(公告)号：US10554142B2

公开(公告)日：2020-02-04

申请号：US16326038

申请日：2016-08-18

Applicant: ABB SCHWEIZ AG

Inventor： Michail Vasiladiotis ,  Tobias Geyer ,  Alexandre Christe

IPC: H02M5/22 ,  H02M5/297 ,  H02M1/08 ,  H02J3/01 ,  H02M1/12 ,  H02J3/34

Abstract: A method of decoupled modulation of a direct AC/AC MMC between a first AC network L having a first waveform and a second AC network R having a second waveform includes performing first and second modulations based on respective reference signals of the first and second AC networks to generate, for each phase leg, first and second integer command signals corresponding to first and second combinations of cell states in the branches of the phase leg needed for generating the first and second waveforms. The method also includes, based on the first and second integer command signals, mapping to each branch a number of cell states to be used for concurrently generating both the first and second waveforms.

公开(公告)号：US20210031896A1

公开(公告)日：2021-02-04

申请号：US17069114

申请日：2020-10-13

Applicant: ABB Schweiz AG

Inventor： Emmanouil Panousis ,  Frank Kassubek ,  Torsten Votteler ,  Gabriel Ortiz ,  Enea Bianda ,  Jan Carstensen ,  Michail Vasiladiotis ,  Angelos Garyfallos

IPC: B63J4/00 ,  C02F1/78 ,  B01F3/04 ,  B01F5/04 ,  C01B13/10

Abstract: A ballast water treatment apparatus and a ballast water treatment system having a ballast water treatment apparatus are provided. The ballast water treatment apparatus includes a ballast water transport line configured to transport ballast water between a first location and a second location, the transported ballast water being passed through at least one injector, and a plasma generation device configured to be fed with a feed gas optionally comprising oxygen, and configured to generate a feed gas plasma by a streamer type discharge in a discharge area to provide a treated gas at a treated-gas outlet. The injector includes a liquid passage having an area constructed such as to increase a velocity of the passed-through water in a region of increased velocity, and an injector gas inlet provided in the region of increased velocity. The treated-gas outlet is in gaseous connection with the injector gas inlet.