ABB Ltd

About: ABB Ltd is a company organization based out in Zurich, Switzerland. It is known for research contribution in the topics: Voltage & Signal. The organization has 6222 authors who have published 6852 publications receiving 83994 citations.

Semiconductor device having an insulated gate

Abstract: A semiconductor device comprises a semiconductor layer (1) of SiCand an insulating layer (4) thereon for insulating the SiC layer with respect to a metal plate (5) constituting a gate and connectable to a voltage for creating a conducting surface channel at the SiC layer-insulating layer interface. At least the portion of the insulating layer (4) closest to said interface is made of a crystalline material which is substantially lattice-matched to SiC and has substantially the same coefficient of thermal expansion as SiC. The insulating layer (4) comprises AlN as only or as major component of an alloy of Group 3B-nitrids and SIC, with AlBN in one preferred embodiment.

Thermoelectric energy storage system with an evaporative ice storage arrangement and method for storing thermoelectric energy

Abstract: A system and method for thermoelectric energy storage is described. The system has a charging cycle (10)for providing thermal energy to a hot thermal storage arrangement (18, 20, 22) and an evaporative ice storage arrangement(24) and a discharging cycle (30) for generating electricity by retrieving the thermal energy. The evaporative ice storage arrangement (24) comprises a heat exchanger(14, 36), an ice slurry storage tank (26), a vacuum evaporation chamber (28) and a slurry heat exchanger(40). The evaporative ice storage arrangement(24) of the present invention functions as a dedicated cold storage for the thermoelectric energy storage system. The cold storage is realized by producing an ice-water mixture during charging of the storage, and using the stored ice-water mixture to condense the working fluid during the discharge cycle (30). Use of this sub-triple-point evaporation arrangement functions to increase the round-trip efficiency of the TEES system through minimising the maximum temperature difference between the working fluid and the thermal storage medium during operating cycles.

System and method for managing and exchanging the data of a technical project, technical installation and individual installation components

Abstract: The invention relates to a system and method for managing and exchanging the data relating to a technical project, a technical installation and/or individual installation components, in particular relating to an automation project. Said system comprises a data processing installation (2) with a conversion device (4) for converting data from at least one proprietary data format into a standardised data format and vice versa. The conversion device (4) allows at least one piece of information given in a proprietary format to be assigned to at least one piece of information given in a standardised data format and/or vice versa by means of at least one data assignment. In addition, the conversion device (4) is configured to detect the corresponding data assignment for at least one piece of information given in a proprietary data format from the existing data assignments and to use said detected data assignment to convert the respective proprietary information into standardised information specified in the data assignment and/or to detect or retrieve the corresponding data assignment for at least one standardised piece of information in the data assignments contained in the conversion device (4) and to use said data assignment to convert the standardised information into proprietary information specified in the data assignment.

Design comparison and control of medium voltage STATCOM with novel twin converter topology

Abstract: A comparison of parallel and the proposed series or twin connected standard converters is presented for a 500 KVAr STATCOM. It is shown that the proposed topology is superior with respect to the filter size and maximum power output. Control issues specific to the twin topology are covered. A new way of controlling the converter under unbalance grid voltage conditions is proposed.

Active DC filter for HVDC system-a test installation in the Konti-Skan DC link at Lindome converter station

Abstract: An active DC filter installed in the Konti-Skan high-voltage DC (HVDC) link is described. The active DC filter is connected at the bottom of an existing passive DC filter. The active DC filter includes an optic harmonic current measuring unit, a control system, a protection and supervision system, a pulse width modulation (PWM) power amplifier, a high-frequency transformer, surge arrester, and coupling apparatus. The active DC filter is small and occupies little ground area. The performance of the active DC filter for eliminating the disturbing harmonics is excellent. >