Abstract:
A method, user interface control arrangement, and a computer program product for controlling a stationary user interface in an industrial process control system as well as to such a process control system. The user interface control arrangement obtains a first live video stream from a video camera monitoring an industrial process at a first location, obtains a process control view for the first location, overlays the process control view on the first live video stream and displays the first live video stream with the overlaid process control view on a display of the user interface.
Abstract:
It is presented a DC/DC converter for converting power between a first DC connection comprising a first positive terminal and a first negative terminal, and a second DC connection comprising a second positive terminal and a second negative terminal. The DC/DC converter comprises: a first multilevel converter and a second multilevel converter connected serially between the first positive terminal and the first negative terminal, wherein the second positive terminal is connected to a point between the first multilevel converter and the second multilevel converter; and a first filter connected between an AC terminal of the first multilevel converter and an AC terminal of the second multilevel converter, wherein the first filter comprises a capacitor and an inductor.
Abstract translation:本发明提供一种DC / DC转换器,用于在包括第一正极端子和第一负极端子的第一DC连接器和包括第二正极端子和第二负极端子的第二DC连接器之间转换功率。 DC / DC转换器包括:串联连接在第一正极端子和第一负极端子之间的第一多电平转换器和第二多电平转换器,其中第二正极端子连接到第一多电平转换器和第二多电平转换器之间的点; 以及连接在第一多电平转换器的AC端子和第二多电平转换器的AC端子之间的第一滤波器,其中第一滤波器包括电容器和电感器。
Abstract:
A high voltage surge arrester including insulating polymer housing with a protruding shed. The shed has an upper shed surface that forms a blunt angle with the longitudinal axis of the surge arrester and a lower shed surface. The lower shed surface includes an inner portion that forms an essentially right angle with said axis and an outer portion that forms an acute angle with said axis. Further the invention relates to an apparatus for moulding an electrically insulating polymer housing.
Abstract:
An interface is disclosed for a self powered protection relay that uses mechanical switches for its configuration. The protection relay can include a base relay for measurement of line current and for generation of a trip signal, and a Human Machine Interface (HMI) unit for specifying, by a user, a base setting of an operating parameter of the protection relay. The base relay can be self-powered from the line and the HMI unit can include an auxiliary power supply. The protection relay is configured with mechanical switches provided in the protection relay. The HMI unit in the protection relay is designed to detect and alert the user of the relay of any change in the base setting carried out with one or more mechanical switches provided in the relay in powered and unpowered conditions of the base relay.
Abstract:
A method of manufacturing a polymer-insulated conductor. The method includes the steps of a) providing a conductor having a first cross-sectional shape, b) passing the conductor through a conductor-shaping die to shape the conductor such that the conductor obtains a second cross-sectional shape, wherein frictional heat is developed in the conductor, thereby setting the conductor in a heated state, c) applying molten polymer to the conductor when the conductor is in the heated state to obtain a polymer-coated conductor, and d) shaping the polymer-coated conductor by means of a polymer-shaping die to thereby obtain the polymer-insulated conductor.
Abstract:
A multilevel current source converter (CSC) for controlling electrical power transmission in a high voltage direct current (HVDC) transmission system includes an alternating current (AC) side for input/output of AC to/from the CSC; a direct current (DC) side for input/output of DC to/from the CSC; and a plurality of modular CSC cells connected in parallel with each other between the AC side and the DC side of the CSC, each modular cell comprising a plurality of switches. The CSC is configured for being connected in series with an HVDC transmission line and for injecting a voltage in series with the HVDC transmission line at the DC side of the CSC.
Abstract:
A method and system for controlling electrical power in a micro-grid, especially during islanding when the micro-grid is disconnected from a main grid is described. A potential load shedding for islanding is determined when the micro grid is connected to the main grid. The potential load shedding is performed when a grid switch that connects the micro-grid to a main grid opens. A frequency based load shedding and a frequency based control of power injections to the micro grid may also be performed. The frequency based load shedding is performed with a faster response than the power injection control during islanding. The frequency based power injection control is performed with a faster response than the frequency based load shedding when the micro grid is connected to the main grid. A load shedding controller, an energy storage controller and methods performed by the load shedding controller, and the energy storage controller, respectively, is also provided.
Abstract:
Embodiments of the present disclosure disclose a main bus-bar. The main bus-bar consists of a first elongated flat portion and a second elongated flat portion. A longitudinal side of the first elongated flat portion and a longitudinal side of the second elongated flat portion are arranged to be joined with each other at a predetermined angle. The thickness of each of said the first elongated flat portion and the second elongated flat portion is non-uniform. With embodiments of the present disclosure, the skin effect and proximity effect caused by current carried in the main bus-bar can be reduced greatly. Embodiments of the present disclosure also disclose a transfer connector, a bus-bar assembly and a bus-bar system.