公开(公告)号：CA2721291C

公开(公告)日：2017-07-11

申请号：CA2721291

申请日：2009-04-17

Applicant: ABB RESEARCH LTD

Inventor： THORBURN STEFAN

IPC: H02J3/18 ,  H02J3/20 ,  H02J3/32

Abstract: It is presented an apparatus comprising: a converter (118) having an AC side and a DC side, a switch (112) adapt-ed to be connected to a transmission line (104) on a first side and the switch being adapted to be connected to a load (122) on a second side, the second side also being connected to the AC side of the converter, an energy storage device (120), connected to the DC side of the converter. In a first operating mode, the switch is closed, such that an energy storage current flows to or from the energy storage device to charge or discharge the energy storage device, respectively, using the converter' for any necessary conversion between AC and DC. In a second operating mode, the switch is open, preventing current from flowing from the trans-mission line to the converter, and the energy storage device supplies a direct current which is converted to an alternating current by the converter. Moreover, in the first operating mode, the apparatus is configured such that a power transfer on the transmission line corresponds to a surge impedance loading of the transmission line, by affecting the energy storage current. A corresponding method is also presented.

公开(公告)号：CA2672403C

公开(公告)日：2016-05-24

申请号：CA2672403

申请日：2007-12-21

Applicant: ABB RESEARCH LTD

Inventor： BENGTSSON TORD ,  THORBURN STEFAN

IPC: G01R27/16

Abstract: Arrangement to determine at least one electrical feature of an electrical device (1). The arrangement comprising a signal injection unit (8) configured to inject a first test signal (t1) at a first main frequency (f1) into a first electric circuit (10), and to inject a second test signal (t2) at a second main frequency (f2) into the first electric circuit (10) or into a second electric circuit (30), a signal conversion unit (7) configured to measure a first and a second electrical quantity in the first electrical circuit resulting from the first test signal (t1), and to measure the first and second electrical quantity in the first (10) or second electric circuit (30) resulting from the second test signal (t2),and a processing device (18) including at least two analogue input channels (16,17) configured to receive the measured electrical quantities and to determine the electrical feature based on the measured electrical quantities, a mixing unit (13) configured to add the measurements (U1,U2) of the first electrical quantity from the first and second testsignals and based thereon generate a first mixed signal, to add the measurements (I1,I2) of the second electrical quantity from the first and second test signals and based thereon generate a second mixed signal, to supply the first mixed signal to a firstinput channel of the processing device and to supply the second mixed signal to a second input channel of the processing device. The processing device is configured to decompose the mixed signals to obtain the measurements of the first and second electrical quantities.

公开(公告)号：AU2008231826B2

公开(公告)日：2012-07-19

申请号：AU2008231826

申请日：2008-03-18

Applicant: ABB RESEARCH LTD

Inventor： THORBURN STEFAN ,  RUSSBERG GUNNAR ,  DAHLGREN MIKAEL

IPC: H01L37/04

Abstract: A device for transforming thermal energy to electric energy comprises a magnetic circuit (1) including at least a portion (3) made of a magnetic material; temperature-varying means (5) for varying the temperature in the portion made of the magnetic material alternately above and below a phase transition temperature of the magnetic material to thereby vary the reluctance of the magnetic circuit; and a coil (7) arranged around the magnetic circuit, in which electric energy is induced in response to a varying magnetic flux in the magnetic circuit. The device comprises a capacitor (9) connected in parallel with the coil to thereby form a resonant circuit (11), wherein the resonance frequency of the resonant circuit and the frequency of the temperature variation above and below the phase transition temperature of the magnetic material are dependent on one another to optimize the electric power output.

公开(公告)号：AT544220T

公开(公告)日：2012-02-15

申请号：AT09731654

申请日：2009-04-17

Applicant: ABB RESEARCH LTD

Inventor： THORBURN STEFAN

IPC: H02J3/18 ,  H02J3/20 ,  H02J3/32

Abstract: An apparatus includes a converter having an AC side and a DC side, a switch adapted to be connected to a transmission line on a first side and connected to a load on a second side connected to the AC side, an energy storage device, connected to the DC side. In a first operating mode, the switch is closed, such that an energy storage current flows to/from the energy storage device to charge/discharge the energy storage device, respectively. In a second operating mode, the switch is open, preventing current from flowing from the transmission line to the converter, and the energy storage device supplies a direct current which is converted to an alternating current by the converter. In the first operating mode, the apparatus is configured such that power transfer on the transmission line corresponds to a surge impedance loading of the transmission line, by affecting the energy storage current.

公开(公告)号：CA2765105A1

公开(公告)日：2011-01-06

申请号：CA2765105

申请日：2009-07-02

Applicant: ABB RESEARCH LTD

Inventor： THORBURN STEFAN ,  LILJESTRAND LARS ,  PETERSSON AKE

IPC: H02J3/18

Abstract: An arrangement to control an electrical property of a medium or high voltage AC system comprising a number n of phases (11 -13) with n being at least two comprises a number n of phases (14-16), each phase comprising a series connection of at least two electrical elements (17) with an intermediate connection point (18) between each pair of the at least two electrical elements, where each of the n phases (14-16) of the arrangement is connected on one side to an original common neutral point (19) and on the other side to one of the n phases (11 -13) of the AC system. The arrangement further comprises a number [n-1] of first switchable interconnections (20, 21), where the first switchable interconnections are each arranged between two intermediate connection points (18) of two of the n phases (14-16) of the arrangement, and at least one control unit (30) arranged to control the first switchable interconnections (20, 21) so that the first switchable interconnections (20, 21) are closed, each between two intermediate connection points (18) of two of the n phases (14-16) of the arrangement, thereby interconnecting all n phases of the arrangement and thereby creating a new common neutral point (26) consisting of the closed first switchable interconnections (20, 21).

公开(公告)号：AT472176T

公开(公告)日：2010-07-15

申请号：AT08717948

申请日：2008-03-18

Applicant: ABB RESEARCH LTD

Inventor： RUSSBERG GUNNAR ,  DAHLGREN MIKAEL ,  THORBURN STEFAN

IPC: H01L37/04 ,  H02N11/00

Abstract: A generator device for converting thermal energy to electric energy. A magnetic circuit includes at least a portion made of a magnetic material. A temperature-varying device varied the temperature in the portion made of the magnetic material alternately above and below a phase transition temperature of the magnetic material to thereby vary the reluctance of the magnetic circuit. A coil is arranged around the magnetic circuit, in which electric energy is induced in response to a varying magnetic flux in the magnetic circuit. A magnetic flux generator creates magnetic flux in the magnetic circuit. The temperature-varying device alternately passes hot and cold fluid by, or through holes in, the portion made of the magnetic material of the magnetic circuit in a single direction to thereby vary the temperature in the portion made of the magnetic material alternately above and below the phase transition temperature of the magnetic material.

公开(公告)号：AU2008231826A1

公开(公告)日：2008-10-02

申请号：AU2008231826

申请日：2008-03-18

Applicant: ABB RESEARCH LTD

Inventor： RUSSBERG GUNNAR ,  THORBURN STEFAN ,  DAHLGREN MIKAEL

IPC: H01L37/04

Abstract: A device for transforming thermal energy to electric energy including a magnetic circuit including at least a portion made of a magnetic material, a temperature-varying device for varying the temperature in the portion made of the magnetic material alternately above and below a phase transition temperature of the magnetic material to thereby vary the reluctance of the magnetic circuit, and a coil arranged around the magnetic circuit, in which electric energy is induced in response to a varying magnetic flux in the magnetic circuit. A capacitor is connected in parallel with the coil to thereby form a resonant circuit, wherein the resonance frequency of the resonant circuit and the frequency of the temperature variation above and below the phase transition temperature of the magnetic material are dependent on one another to optimize the electric power output.

公开(公告)号：EP2134993A4

公开(公告)日：2010-03-31

申请号：EP08724151

申请日：2008-03-28

Applicant: ABB RESEARCH LTD

Inventor： RUSSBERG GUNNAR ,  DAHLGREN MIKAEL ,  THORBURN STEFAN ,  ROTHMAN BENGT

IPC: H01L37/04 ,  F16K11/085 ,  H02N11/00

CPC classification number: H02N11/002 ,  F16K11/0853 ,  H01L37/04 ,  Y02E10/34

Abstract: A generator device for converting thermal energy to electric energy. A magnetic circuit includes at least a portion made of a magnetic material. A temperature-varying device varied the temperature in the portion made of the magnetic material alternately above and below a phase transition temperature of the magnetic material to thereby vary the reluctance of the magnetic circuit. A coil is arranged around the magnetic circuit, in which electric energy is induced in response to a varying magnetic flux in the magnetic circuit. A magnetic flux generator creates magnetic flux in the magnetic circuit. The temperature-varying device alternately passes hot and cold fluid by, or through holes in, the portion made of the magnetic material of the magnetic circuit in a single direction to thereby vary the temperature in the portion made of the magnetic material alternately above and below the phase transition temperature of the magnetic material.