AWA Sweden AB

A TDM MIMO FMCW radar comprises at least one row of physical receivers with a first spacing in a first direction, and further comprises a plurality of physical transmitters arranged with a second spacing in said first direction. To determine whether a peak in an angle spectrum corresponds to a direct reflection or a first-order multipath artefact, a full-array angle spectrum (901) based on all elements of a virtual array signal, and a single-subarray angle spectrum (902) based on one subarray are computed. If a peak in the full-array angle spectrum and a corresponding baseline peak in the single-subarray angle spectrum are co-located, it is concluded that the peak represents a direct reflection in the scene. Otherwise, if the peak and the baseline peak are not co-located, it is concluded that the peak represents a first-order multipath artefact.

There is provided a method, device, and system for tracking an object in a sequence of video frames by using a tracking filter. In the method, costs are assigned for associating each object detection in a received set of object detections to the tracked object. The cost assigned to an object detection is a measure of deviation between a motion associated with the object detection and both of a first motion of the object estimated by the tracking filter and a second motion of the object indicated by motion vectors from a video encoder which encodes the sequence of video frames.

There is disclosed herein a method (100) implemented in a grid forming control system (1) of a power converter (20) being connected to an electrical power network (10). The grid forming control system comprises a synchronization unit (12) providing a back electromotive force, EMF voltage to a virtual admittance controller (14) and a current limiter (16). The method comprises determining (110) a non-limited power parameter based on a non-limited current obtained from the virtual admittance controller and a back electromotive force voltage, determining (120) a limited power parameter based on a limited current obtained from the current limiter and a measured voltage, and providing (130) a power deceleration parameter based on the non-limited power parameter and the limited power parameter, wherein an input to the synchronization unit is based on the power deceleration parameter. The present disclosure further relates to a grid forming control system and an electrical power network system.

The disclosure relates to a heat pump arrangement (300, 301) comprising: a buffer tank (350) for housing a buffer fluid; a valve arrangement (360, 360'); an inlet/outlet (340); and a module (330) having an input side (331) in fluid communication with the buffer tank (350) via the valve arrangement (360, 360') and an output side (332) configured to be connected to a hot fluid side, wherein the input side (331) of the module (330) is configured to be fluidly connected to a cold fluid side (900, 901, 900'), only, via the inlet/outlet (340) for extracting thermal energy from the cold fluid side (900, 901, 900') to the arrangement (300, 301), and wherein the arrangement (300, 301) is configured to operate in: a filling mode for supplying buffer fluid to the buffer tank (350), in which mode a fluid flow direction through the inlet/outlet (340) is only in an input direction (D1), or in a emptying mode for discharging buffer fluid from the buffer tank (350), in which mode the fluid flow direction through the inlet/outlet (340) is only in an output direction (D2), being opposite the input direction (D1).

The present disclosure relates to a control device (20) configured to control a voltage source converter, VSC, (10) electrically connected to an electrical power network (40) via a point of common connection, PCC, the control device (20) comprising an active power loop controller (21), wherein, when the electrical power network (40) after a fault operates with a short-circuit power indicative of a short-circuit ratio, SCR, within at least one predetermined SCR interval (SCR_I, SCR_II), the active power loop controller (21) is configured to: control an internal frequency (ω_EMF) of the VSC (10) via an active power control circuit (211) when an active power (P_g) being exchanged between the VSC and the electrical power network (40) via the PCC is equal to or below an active power saturation limit (P_{sat_UPlim}), and control the internal frequency (ω_EMF) via the active power control circuit (211) and an active power limiter control circuit (212) to reduce the active power (P_g) below the active power saturation limit (P_{sat_UPlim}) when the active power (P_g) is above the active power saturation limit (P_{sat_UPlim}), wherein the active power saturation limit (P_{sat_UPlim}) is based at least on one of at least one active power limit (P_lim1, P_lim2), each active power limit based at least on at least one parameter (V_g, P_g, Q_g) of the electrical power network (40). A power supporting system and a method of controlling a voltage source converter are also disclosed.

Techniques are described for generating point clouds of a site. A laser scanner of an onsite device captures scan data of the site. A GNSS receiver of the onsite device captures GNSS position data. A georeferenced point cloud including a plurality of points is generated using the scan data and the GNSS position data. The georeferenced point cloud is segmented using a trained machine learning model by assigning the plurality of points to a set of classes including a noise class and one or more non-noise classes to produce a segmented point cloud. A portion of the segmented point cloud assigned to the one or more non-noise classes is wirelessly transmitted to an offsite device that is remote from the site. The portion of the segmented point cloud is stored at the offsite device in an accumulated point cloud for subsequent processing at the offsite device.

There is disclosed herein a STATCOM (20), configured to be connected to an electrical power network system (1) comprising at least one inverter-based resource (3) connected to a transformer (4) by an AC transmission line (5). The transformer is connected to an electrical power network (2). The STATCOM is connected between the AC transmission line and the transformer. The STATCOM comprises a converter (22) and a grid forming control system (10) comprising a virtual admittance controller (12) configured to provide a virtual admittance current (I_VA), a voltage flicker balancer controller (14) configured to provide a current reference (I_ref) based on a current measured in the electrical power network system, and a current limiting controller (16) configured to provide a voltage reference (V_ref) for operating the converter of the STATCOM based on the current reference and the virtual admittance current. The present disclosure further relates to an electrical power network system.

The present disclosure relates to a computer-implemented method for impedance estimation of an electrical power network, wherein a voltage source converter, VSC, is electrically connected to the electrical power network via a point of common connection, PCC, the method comprising: upon detecting a fault perturbing an impedance (Zg) of the electrical power network so that a per-unit impedance (Zg) of the electrical power network deviates from a pre-fault value, determining a set of data points (xk , yk ) based at least on a plurality of measurements of an active power (Pg) and a reactive power (Qg) being exchanged between the VSC and the electrical power network via the PCC; performing a circle fitting on the set of data points (xk , yk ) to estimate a center point (xc_est, yc_est) and a radius (rc_est) of a quasi-power circle (Cqp ); and determining an estimated impedance (Zg_est) of the impedance (Zg) of the electrical power network based on the coordinates of the center point and radius, wherein Rg_est corresponds to an estimated fundamental frequency resistance of the electrical power network and Xg_est corresponds to an estimated fundamental frequency reactance of the electrical power network. A control device implementing the method and a power supporting system are also disclosed.

The present disclosure relates to a method for recycling textile fibre material, the method comprising: fragmentising the textile fibre material for obtaining a fragmentised textile fibre material; wetting the fragmentised textile fibre material with a binder agent in the form of an aqueous solution comprising sodium silicate for obtaining a wetted textile fibre material; moulding the wetted textile fibre material into a tile shaped element; and curing the tile shaped element for obtaining a cured tile shaped element comprising textile fibre material in an amount of at most 80 weight%.

A radiation imaging apparatus includes a substrate (92) and a radiation-sensitive imaging region (96) in the substrate (92) including a plurality of pixels (93) disposed on a surface of the substrate (92), wherein each pixel (93) is configured to act as a detector element. The radiation imaging apparatus also includes a guard region (94) disposed on the surface and including a plurality of guard rings (101) disposed about a periphery of the radiation-sensitive imaging region (96) at or immediately adjacent a cut edge (95) of the substrate (92), wherein the guard region (94) forms an inactive region (98) about the periphery of the radiation-sensitive imaging region (96), and the guard region (94) includes at least one trench (110) formed in the guard region (94) disposed about the periphery of the radiation-sensitive imaging region (96), and wherein the at least one trench (110) is configured to improve detection efficiency of pixels (93) of the plurality of pixels (93) located closest to the cut edge (95) while reducing a width (108) of the guard region (94).