Patents by Inventor Mats Larsson
Mats Larsson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 8019484Abstract: The present disclosure is concerned with the combined voltage or power flow control and damping of electromechanical oscillations in an electric power system by Flexible AC Transmission System (FACTS) devices or High Voltage DC (HVDC) transmission devices. To this end, information about a state or operating point of the power system is generated from suitable second system signals (y2) and a control parameter (cp) of a FACTS controller is derived therefrom. The control parameter and a first system signal (y1) are used in the calculation of a control command (u) defining the settings of the FACTS device. Following a change in the state of the power system such as a change in the topology of a transmission network, poorly damped or even unstable oscillations are avoided by appropriate re-tuning of the control parameter of the damping or stabilizing equipment.Type: GrantFiled: December 7, 2007Date of Patent: September 13, 2011Assignee: ABB Research LtdInventors: Petr Korba, Alexandre Oudalov, Mats Larsson, Johan A. Lindberg, Stefan G. Thorburn
-
Publication number: 20110202191Abstract: A system and method of controlling an electricity generating system that includes at least one intermittent energy source generating plant are disclosed. An exemplary method includes calculating actual operating parameters of the at least one intermittent energy source generating plant; calculating forecast operating parameters of the at least one intermittent energy source generating plant; generating intermittent energy source contingency definitions from such actual operating parameters and forecast operating parameters; analysing the intermittent energy source contingency definitions to provide contingency analyses; and controlling the electricity generating system in dependence upon such contingency analyses.Type: ApplicationFiled: February 18, 2010Publication date: August 18, 2011Applicant: ABB Research Ltd.Inventors: Mats LARSSON, Adrian Timbus, Carsten Franke, Jorge Naccarino
-
Patent number: 7973427Abstract: The disclosure relates to a converter control unit or power system stabilizing unit for counteracting oscillations in electric power systems that is equipped and employed to provide and processes information for system-wide monitoring, protection, control and metering. It comprises means for synchronized (e.g. via GPS or another absolute/global time reference) sampling of voltages and/or currents, means for down-sampling in order to decrease the number of samples, and means for calculating phasors, i.e. time stamped amplitude and phase angle of the voltages and/or currents.Type: GrantFiled: August 29, 2008Date of Patent: July 5, 2011Assignee: ABB Research LtdInventors: Petr Korba, Rudolf Wieser, Srinivas Ponnaluri, Mats Larsson, Alexandre Oudalov, Jose Taborda, Peter Steimer
-
Publication number: 20110157033Abstract: An electronic apparatus includes a display panel (12) connected to a body (10) and able to occupy a first and second position with respect to the body (10), and an input panel (14) connected to the body (10) and able to occupy a first and second position with respect to the body (10). When the display panel (12) and the input panel (14) both occupy their respective first position, the input panel (14) hides part of the display panel (12). When the display panel (12) occupies its first position and the input panel (14) occupies its second position, the display panel (12) hides at least part of the input panel (14). When the display panel (12) occupies its second position, the input panel (14) is movable from its first position to its second position and/or movable from its second position to its first position.Type: ApplicationFiled: April 23, 2010Publication date: June 30, 2011Applicant: SONY ERICSSON MOBILE COMMUNICATIONS ABInventors: Rajeev REMA SHANMUGAM, Mohanraj MANOHARAN, Mats LARSSON, Gunnar KLINGHULT
-
Patent number: 7956596Abstract: A limitation of the interaction between cascaded tap changers and/or between a tap changer and a shunt compensator independently of any real-time communication between the respective controllers is disclosed. Coordinated voltage control in distribution networks can be achieved by an adaptive updating or tuning of control parameters DB4, TD4 of a voltage control unit controlling a second voltage control device, depending on instantaneous or actual operating conditions evaluated by the voltage control unit itself. Instead of using constant control parameters initially set by a commissioning engineer, the parameters are updated based on a voltage level UP4, which in turn is responsive to or affected by any control action performed by a first voltage control device neighboring the second voltage control device.Type: GrantFiled: April 16, 2010Date of Patent: June 7, 2011Assignee: ABB Research LtdInventor: Mats Larsson
-
Patent number: 7912589Abstract: The present disclosure relates to monitoring of electromechanical oscillations in electric power systems, and their identification by an adaptive algorithm based on a repeatedly measured and evaluated signal. In order for an estimation of parameters of a model of the power system to reasonably converge, proper initialization of the recursive calculation is required, including the definition of tuning parameters constraining the model and the calculation. Initialization for a second signal to be exploited can then be simplified by copying the set of tuning parameters tuned previously for a different signal. A conditioning gain multiplying the second signal establishes compatibility between the different signals, and a signal pre-filter in turn discards contributions beyond a frequency band comprising typical electromagnetic oscillations.Type: GrantFiled: April 29, 2008Date of Patent: March 22, 2011Assignee: ABB Research LtdInventors: Petr Korba, Marek Zima, Mats Larsson
-
Publication number: 20110035067Abstract: A method and system are disclosed for controlling a distribution of electrical power in a power distribution network having a first power distribution region and a second power distribution region. The first power distribution region can include first primary devices that interact with first process devices, and the second power distribution region can include second primary devices that interact with second process devices a distribution controller including a standardized description of the first region. A first distribution controller can be connected to the first process devices, can control a distribution of electrical power in the first power distribution region, and can identify, following a network reconfiguration, an orphan network section that is disconnected from the first region and connected to the second region.Type: ApplicationFiled: September 9, 2010Publication date: February 10, 2011Applicant: ABB Research LTDInventors: Mats LARSSON, Christian Frei, Adrian Timbus, Cherry Yuen
-
Patent number: 7865331Abstract: Time synchronization of two clocks is disclosed herein, such as two stationary clocks. A global time signal from a global time reference or common time source can be used to calculate a common view based clock offset between the two clocks. In parallel, a network based clock offset between the two clocks can be calculated based on messages exchanged over a communication network interconnecting the two clocks, without reverting to the global time reference. Two recent values (e.g., the two most recent values) of the common view clock offset and the network based clock offset can be combined or superposed in a seamless way to produce a final time offset estimate. The combination of independently calculated common view and network based clock offsets can be a weighted average of the two values, involving respective weights based on quality estimates of the latter.Type: GrantFiled: February 2, 2010Date of Patent: January 4, 2011Assignee: ABB Research LtdInventors: Dacfey Dzung, Mats Larsson
-
Publication number: 20100264897Abstract: A limitation of the interaction between cascaded tap changers and/or between a tap changer and a shunt compensator independently of any real-time communication between the respective controllers is disclosed. Coordinated voltage control in distribution networks can be achieved by an adaptive updating or tuning of control parameters DB4, TD4 of a voltage control unit controlling a second voltage control device, depending on instantaneous or actual operating conditions evaluated by the voltage control unit itself. Instead of using constant control parameters initially set by a commissioning engineer, the parameters are updated based on a voltage level UP4, which in turn is responsive to or affected by any control action performed by a first voltage control device neighboring the second voltage control device.Type: ApplicationFiled: April 16, 2010Publication date: October 21, 2010Applicant: ABB RESEARCH LTDInventor: Mats Larsson
-
Publication number: 20100245240Abstract: The invention relates to an electronic device and a method for controlling functionality of such an electronic device in relation to a display unit. The electronic device includes a base unit (3); a display unit (2), an orientation sensing arrangement and an orientation determining unit. The display unit (2) has a first surface area and a second surface area (13) joined to each other by a first and second opposite bounding side and is fastened to and movable in relation to the base unit (3). The orientation sensing arrangement comprises a first sensing unit (15) on the display unit (2) and a second sensing unit (16) on the base unit (3), which arrangement detects that the sensing units are able to communicate with each other and indicates this communication. The orientation determining unit then activates selected functionality of the electronic device based on the indication from the orientation sensing arrangement.Type: ApplicationFiled: February 29, 2008Publication date: September 30, 2010Inventors: Henrik Heringslack, Mats Larsson, Stefan Sörensson
-
Publication number: 20100233014Abstract: A powder metallurgical combination is provided comprising an iron-based powder A comprising core particles of iron to which core particles nickel is diffusion alloyed and wherein said nickel diffusion alloyed to said core particles comprises 4-7% (preferably 4.5-6%) by weight of said iron-based powder A, and a powder B substantially consisting of particles of pure iron. Further a method is provided for preparing a powder metallurgical combination.Type: ApplicationFiled: July 10, 2008Publication date: September 16, 2010Applicant: HOGANAS AB (PUBL)Inventor: Mats Larsson
-
Publication number: 20100204843Abstract: A distribution controller is disclosed for controlling a distribution of electrical power in an assigned power distribution region. The controller is adapted to be communicatively connected to process or secondary devices (IEDs, RTUs) which in turn interact with primary devices of the assigned region. The controller includes a processing module executing algorithmic, logical or functional modules or client applications. The latter implement application function algorithms that calculate, based on process data from process devices connected to the controller, values of a power distribution quantity such as voltage, current, power flow, load, or a phasor quantity of the assigned region. The controller further includes, for the purpose of data exchange with the process devices communicatively connected to the controller, data servers. The controller is adapted for writing the output or results of the functional module, i.e.Type: ApplicationFiled: July 17, 2008Publication date: August 12, 2010Applicant: ABB Research Ltd.Inventors: Mats Larsson, Cherry Yuen, Antti Hakala-Ranta
-
Publication number: 20100204851Abstract: The present disclosure is concerned with controlling distributing of electrical power in a power distribution region. To effectively control the distribution of power in the distribution region, the substation of the region is provided with a distribution controller or Intelligent Substation Control System (ISCS). The distribution controller is connected to various process devices, which in turn are connected to primary devices of the region. The process devices send data corresponding to the primary devices to the distribution controller, and the distribution controller includes a processor which proposes a set of actions based on the received data. Further, the distribution controller includes a coordinating device which selects the final action from the set of proposed actions. The final action is implemented on the primary devices of the distribution region.Type: ApplicationFiled: July 17, 2008Publication date: August 12, 2010Applicant: ABB Research Ltd.Inventors: Cherry Yuen, Andrew Paice, Mats Larsson, Christian Frei
-
Publication number: 20100138187Abstract: Time synchronization of two clocks is disclosed herein, such as two stationary clocks. A global time signal from a global time reference or common time source can be used to calculate a common view based clock offset between the two clocks. In parallel, a network based clock offset between the two clocks can be calculated based on messages exchanged over a communication network interconnecting the two clocks, without reverting to the global time reference. Two recent values (e.g., the two most recent values) of the common view clock offset and the network based clock offset can be combined or superposed in a seamless way to produce a final time offset estimate. The combination of independently calculated common view and network based clock offsets can be a weighted average of the two values, involving respective weights based on quality estimates of the latter.Type: ApplicationFiled: February 2, 2010Publication date: June 3, 2010Applicant: ABB Research LtdInventors: Dacfey DZUNG, Mats Larsson
-
Publication number: 20100094477Abstract: The present disclosure relates to power system sensitivities as computed from power flow parameters and control parameters of a Power Flow Control Device (PFC). To this end, control parameter variations are applied to or generated by a PFC, and comprise variations in a control input u, a control effort e (injected series voltage, inserted series reactance), or a control effect q (power flow, active power transfer, phase-shift, current). A power flow response measuring unit measures a variation of a power flow response such as current, active or apparent power, in a way sufficiently synchronized with the control parameter variation to allow establishing an unambiguous causal relationship or correspondence in the form of a power system sensitivity.Type: ApplicationFiled: April 3, 2009Publication date: April 15, 2010Applicant: ABB Research LtdInventors: Bertil Berggren, Mats Larsson, Tord Bengtsson, Petr Korba, Alexandre Oudalov
-
Publication number: 20100054982Abstract: A powder for use in the powder metallurgical manufacture of components is provided. Particularly the subject matter concerns an iron or iron based powder intended for the powder metallurgical manufacturing of components. It is especially suitable for manufacturing of components wherein self-lubricating properties are desired. The subject matter further relates to a method of manufacturing a component from said powder and an accordingly produced component. A diffusion-bonded powder comprising iron or iron-based particles, and particles diffusion-bonded to the iron or iron-based particles is provided. The said particles diffusion-bonded to the iron or iron-based particles may comprise an alloy of Cu and 5% to 15% by weight of Sn. A component is provided which is at least partly formed from such a diffusion-bonded powder.Type: ApplicationFiled: December 28, 2007Publication date: March 4, 2010Applicant: HOGANAS ABInventor: Mats Larsson
-
Publication number: 20100023179Abstract: Exemplary embodiments of the present disclosure provide a method and controller for damping multimode electromagnetic oscillations in electric power systems which interconnect a plurality of generators and consumers. The controller for damping such oscillations includes a phasor measurement unit (PMU) and a power oscillation damper (POD) controller. Each oscillating mode signal is damped and then superposed to derive a control signal. A feedback controller is used to feedback the control signal to a power flow control device in the power system.Type: ApplicationFiled: September 16, 2009Publication date: January 28, 2010Applicant: ABB Research LtdInventors: Petr KORBA, Mats Larsson
-
Publication number: 20090309825Abstract: A user interface for a portable apparatus is disclosed. The user interface comprises a sensor arranged to determine a spatial change, wherein said user interface being arranged to control at least one function, wherein the function is controlled by said determined spatial change; an actuator arrangement; and at least one mass, wherein the actuator arrangement is arranged to controllably actuate at least one of the at least one mass by acceleration to by inertia of the actuated mass provide a force on the portable apparatus. Further, an apparatus, a method, and a computer program for controlling a function are disclosed.Type: ApplicationFiled: June 13, 2008Publication date: December 17, 2009Applicant: SONY ERICSSON MOBILE COMMUNICATIONS ABInventors: Peter SODERGREN, Mats LARSSON
-
Patent number: 7612306Abstract: At least one key of a keypad of an electronic device, such as a wireless terminal, includes a polymer light emitting device, also referred to as a polymer LED, thereon. A polymer LED may be on the inner and/or outer surface of the face of the key and may be unpatterned and/or patterned to form a symbol.Type: GrantFiled: March 25, 2008Date of Patent: November 3, 2009Assignee: Sony Ericsson Mobile Communications ABInventors: Gunnar Klinghult, Mats Larsson
-
Publication number: 20090216472Abstract: A relationship between a temperature TI of a power line or power transmission conductor, an electrical quantity of the power line such as a current I or power flow P through the power line, as well as meteorological quantities or ambient conditions of the power line such as wind speed W, wind direction, humidity, solar radiation S and ambient temperature Ta, is established in the form of a thermal model of the power line. Values of the aforementioned quantities or variables are continuously measured, and the collected values of the quantities are evaluated in order to update model parameters of the thermal model during operation of the power line. In one example, an average temperature representative of the entire line is determined via two Phasor Measurement Units (PMU) 11, 11? providing synchronized phasor values from two ends of the power line. An ohmic resistance of the power line is computed from the phasor values, from which in turn the average line temperature can be derived.Type: ApplicationFiled: February 10, 2009Publication date: August 27, 2009Applicant: ABB Research LtdInventors: Marek Zima, Petr Korba, Albert Leirbukt, Mats Larsson