公开(公告)号：EP3345277B1

公开(公告)日：2019-07-24

申请号：EP15762955.1

申请日：2015-09-01

Applicant: ABB Schweiz AG

Inventor： HARNEFORS, Lennart

IPC: H02J3/24 ,  H02M5/257 ,  G05B19/02

公开(公告)号：EP4429061A1

公开(公告)日：2024-09-11

申请号：EP23161135.1

申请日：2023-03-10

Applicant: ABB SCHWEIZ AG

Inventor： HARNEFORS, Lennart ,  TSOUMAS, Ioannis

IPC: H02J3/24 ,  H02J3/36 ,  H02J3/38

CPC classification number: H02J3/381 ,  H02J3/36 ,  H02J2300/2820200101 ,  H02J3/241

Abstract: A method (200) of controlling a wind farm (10) including a plurality of wind turbines (11) installed in an AC subgrid (12), which is connected via a DC line (20) to an energy conversion device (21), the method comprising:
controlling (210) a power infeed of each wind turbine to maintain a setpoint grid frequency;
sensing (212) a grid frequency in the subgrid;
determining (214) a reference quantity based on a difference of the sensed grid frequency and the setpoint grid frequency; and
controlling (216) the energy conversion device in accordance with the determined reference quantity.

公开(公告)号：EP4231516A1

公开(公告)日：2023-08-23

申请号：EP22158052.5

申请日：2022-02-22

Applicant: ABB SCHWEIZ AG

Inventor： TSOUMAS, Ioannis ,  HARNEFORS, Lennart

IPC: H02M7/23 ,  H02P29/50

Abstract: A converter system (14) comprises at least two branches (18), wherein each branch (18) comprises an AC-to-DC converter (26) and a DC link (28) cascade connected with each other. A method for controlling a converter system (14) comprises: determining at least two AC-side currents i I S i II S , each of which is input into one of the AC-to-DC converters (26); determining from the AC-side currents i I S i II S , a voltage reference v av ref v diff ref for each of the AC-to-DC converters (26), such that the AC-side current i I S i II S follows a current reference i av ref i diff ref , for the respective AC-to-DC converter (26); determining a DC link ripple indicator (V dc,av , i dc,av , p av ), which DC link ripple indicator (v dc,av , p av ) is an average DC link voltage (V dc,av ) of the DC links (28), an average DC link current (i dc,av ) of the DC links (28) and/or an average active power (p av ) input into the at least two branches (18); determining a converter reference correction (44) from the DC link ripple indicator (V dc,av , i dc,av , p av ), such that a higher order harmonic in the average DC link voltage (V dc,av ) is damped; determining corrected voltage references v I s ref v II s ref for the AC-to-DC converter (26) by adding the converter reference correction (44) to the voltage references of the AC-to-DC converters (26) or by adding the converter reference correction (45) to an average current reference for the AC-to-DC converters (26); and controlling the AC-to-DC converters (26) with the respective corrected voltage references v I s ref v II s ref .

公开(公告)号：EP3916985A1

公开(公告)日：2021-12-01

申请号：EP20176272.1

申请日：2020-05-25

Applicant: ABB Schweiz AG

Inventor： HARNEFORS, Lennart ,  BONGIORNO, Massimo ,  WANG, Xiongfei

IPC: H02M7/48 ,  H02M1/12 ,  H02J3/24

Abstract: The present invention relates to a voltage-source converter, VSC, control system comprising an active damper, AD, a direct-voltage controller, DVC, and an alternating-voltage controller, AVC. The VSC control system is configured to control a VSC. The AVC (1) is configured to regulate, using an integrator, an ac-bus voltage of the VSC by calculating a q component of a current reference vector for the VSC. The DVC (2) is configured to regulate, using an integrator, a dc-bus voltage of the VSC by calculating a d component of the current reference vector. The AD (3) is configured to amplify a vectoral difference between the ac-bus voltage and a corresponding reference, and to add the q component of the amplified vectoral difference to the q component of the current reference vector and to an input of the integrator of the AVC.

公开(公告)号：EP3487060A1

公开(公告)日：2019-05-22

申请号：EP17202372.3

申请日：2017-11-17

Applicant: ABB Schweiz AG

Inventor： HARNEFORS, Lennart ,  ZHANG, Lidong

IPC: H02M7/5387

Abstract: The present disclosure relates to a method of controlling a grid-connected voltage source converter, VSC, using power-synchronisation control, wherein the method comprises: determining a VSC current vector (i) based on a VSC phase angle (θ) which is determined based on an integration of a power control error, determining an active power producing current component i d ref of a reference current vector ( i ref ) based on an active power reference (P ref ) for the VSC, determining the reference current vector ( i ref ) based on the active power producing current component i d ref , determining a damping component based on a virtual damping resistance (R a ), the reference current vector ( i ref ) and the VSC current vector ( i ), determining a voltage vector ( v ) based on a VSC voltage magnitude (V) and the damping component, and controlling the VSC based on the voltage vector ( v ).

公开(公告)号：EP3345277A1

公开(公告)日：2018-07-11

申请号：EP15762955.1

申请日：2015-09-01

Applicant: ABB Schweiz AG

Inventor： HARNEFORS, Lennart

IPC: H02J3/24 ,  H02M5/257 ,  G05B19/02

CPC classification number: H02J3/24 ,  G05B19/02 ,  H02M5/257 ,  H03L7/08

Abstract: A Voltage Source Converter control system for active damping of a resonance oscillation in the VSC includes a regular Phase-Locked Loop 2, and a slow PLL 3. The control system is arranged such that an imaginary part of the AD is obtainable from the slow PLL. The slow PLL is configured for having a closed-loop bandwidth which is less than a frequency, in a synchronous dq frame, of the resonance oscillation to be dampened.

公开(公告)号：EP4485793A1

公开(公告)日：2025-01-01

申请号：EP23181621.6

申请日：2023-06-27

Applicant: ABB SCHWEIZ AG

Inventor： HARNEFORS, Lennart ,  IKRAM UL HAQ, Omer ,  BOSGA, Sjoerd ,  SAARINEN, Kari

IPC: H02P23/14 ,  H02P29/00

Abstract: A method of identifying one or more parameters of a resonant dynamical system describing a physical system, the method comprising: a) simultaneously stimulating the physical system by means of a first frequency below an expected resonance frequency of the resonant dynamical system and a second frequency above the expected resonance frequency, b) increasing the first frequency and decreasing the second frequency, wherein one of the first frequency and the second frequency is set before the other one of the first frequency and the second frequency and is based on a difference between 1 and a gain ratio of a first gain of the resonant dynamical system at the first frequency, and a second gain of the resonant dynamical system at the second frequency, and performing steps a)-b) until a difference between the second frequency and the first frequency is equal to a threshold value, c) freezing the one of the first frequency and the second frequency that in step b) is set after the other frequency when the difference has reached the threshold value, to obtain a first frozen frequency value, d) adjusting the one of the first frequency and the second frequency which is not frozen in step c) to move closer to the first frozen frequency value, and repeating step d) until the gain ratio is within a predetermined acceptable range, or until a predetermined amount of time from the start of the first iteration of step a) has passed, and setting the adjusted first frequency or second frequency in the last iteration in step d) to a second frozen frequency value, and e) estimating a resonance frequency of the resonant dynamical system based on the first frozen frequency value and the second frozen frequency value.

公开(公告)号：EP3314714A1

公开(公告)日：2018-05-02

申请号：EP15732686.9

申请日：2015-06-29

Applicant: ABB Schweiz AG

Inventor： HARNEFORS, Lennart ,  TENGNER, Tomas

IPC: H02J3/32 ,  H02M7/483

CPC classification number: H02M7/483 ,  G05B11/012 ,  H02J3/32 ,  H02M2007/4835

Abstract: A multi-level power converter for one or more phases includes one or more converter arms including a plurality of serial connected switching cells. Each switching cell includes a plurality of switching devices, a primary energy storage, a secondary energy storage and a first inductor. The switching devices are arranged to selectively provide a connection to the primary energy storage, wherein each switching cell includes a bridge circuit including the switching devices and the primary energy storage, a battery circuit connected to the bridge circuit and including the secondary energy storage, and an arm circuit providing a connection between two adjacent switching cells. The first inductor of each switching cell is arranged in the arm circuit.

公开(公告)号：EP3254368A1

公开(公告)日：2017-12-13

申请号：EP15704496.7

申请日：2015-02-04

Applicant: ABB Schweiz AG

Inventor： TENGNER, Tomas ,  LACHICHI, Amel ,  HARNEFORS, Lennart ,  KARMIRIS, Georgios

IPC: H02M7/797 ,  H02J3/32 ,  H02M7/49 ,  H02M7/483

Abstract: A multilevel power converter includes at least one phase leg. The phase leg includes a plurality of cascaded chain link connected cells, each cell including a capacitor and two semiconductor switches in series, each with an anti-parallel connected diode. The plurality of cascaded chain link connected cells includes first and second cells which form a mirrored cell-pair such that the two semiconductor switches of each of the first and second cells are all connected in series with each other. The converter further includes an energy storage connected between the first and second cells.

公开(公告)号：EP4472059A1

公开(公告)日：2024-12-04

申请号：EP23176831.8

申请日：2023-06-01

Applicant: ABB SCHWEIZ AG

Inventor： HARNEFORS, Lennart ,  IKRAM UL HAQ, Omer ,  BOSGA, Sjoerd

IPC: H02P6/10 ,  H02P23/04 ,  H02P23/14

Abstract: A method of reducing vibrations in an electric motor comprising a rotor and a stator, by means of an active vibration controller, AVC, the method comprising: a) determining whether one of an angular rotational speed of the rotor and an angular stator frequency multiplied by two is within a critical range comprising a mechanical resonance frequency of a motor assembly comprising the electric motor and its load, b) i) setting an oscillating incremental torque angular frequency of the AVC to the angular rotational speed of the rotor if the angular rotational speed of the rotor is within the critical range, or ii) setting the oscillating incremental torque angular frequency to the angular stator frequency multiplied by two if the angular stator frequency multiplied by two is within the critical range, iii) generating an oscillating incremental torque reference using the AVC with the oscillating incremental torque angular frequency set in step b i) or b ii), and iv) controlling the electric motor based on a sum of the oscillating incremental torque reference and an electrical torque reference; or c) i) deactivating the AVC if the angular rotational speed of the rotor and the angular stator frequency multiplied by two is outside the critical range, and ii) controlling the electric motor based on the electrical torque reference.