Abstract: Method and apparatus for mitigating SSR in power transmission system are provided. The method comprises: checking whether the sub-synchronous resonance (SSR) happens in the power transmission system; checking whether the sub-synchronous resonance is undamped; providing a command to bypass the SC unit when the SSR happens and is undamped. In some embodiments, the method further comprises providing a command to reinsert the SC unit into the power transmission system when the transmission level of the power transmission system is determined to be higher than a predetermined level and there is no fault in the power system. The invention also relates to a corresponding apparatus which can implement the method of the invention.

Abstract: A mechanical switch in the form of a bypass switch assembly is arranged between two electrical conductors (busbars) and stays open during normal operation. When a cell fault happens, the fault and bypass information is transmitted to an actuator (acting as a trigger circuit) which activates inter alia a gas generator producing huge volume of gas in a very short time. The gas pressure pushes a movable member to bridge the two electrical conductors with ultrafast speed.

Abstract: A modular voltage source converter (100) comprises a plurality of cells conformal to a basic cell design comprising a first and a second terminal, a capacitor and at least two switches arranged in a half-bridge or full-bridge configuration. In the converter, a first group is formed by a number n of cells (101-k, k=1, n) connected serially at their terminals, and a second group is formed by an equal number n of cells (102-k, k=1, n) connected serially at their terminals. The terminals of the cells (101-k) in said first group are connected, via a resistive or inductive connection element (110-k), to the terminals of corresponding cells (102-k) in said second group.

Abstract: A filter apparatus includes at least one filter, each filter being tunable and including at least one capacitor arrangement. The capacitor arrangement includes a plurality of first capacitors, a plurality of second capacitors, and a plurality of switches. Each switch is switchable between a non-conducting mode and a conducting mode. The plurality of second capacitors and the plurality of switches are arranged to connect or disconnect the second capacitors on different potentials in order to tune the filter by adjusting the capacitance of the filter. An electrical power transmission or distribution system includes such a filter apparatus. A method is provided for filtering harmonics in an electrical power transmission or distribution system by means of such a filter apparatus.

Abstract: A socket is provided for removing or installing a fastener having a hexagonally shaped portion. The socket includes a body having a longitudinal axis and opposing first and second ends. First surfaces define a tool-receiving portion at the first end. The tool-receiving portion is constructed and arranged to receive a portion of a tool. Second surfaces define a socket portion at the second end. The socket portion is constructed and arranged to receive and engage the portion of the fastener therein. Holding structure is associated with the socket portion and is constructed and arranged to non-magnetically hold the portion of the fastener in the socket portion so as to not fall out of the socket portion, either due to friction or vacuum, without providing torque to the fastener when the socket is rotated during installation or removal of the fastener.

Abstract: A method and a system are disclosed for simulation in a substation. The method can include acquiring substation data from substation condition data and base substation record; adapting the acquired substation data to suit a target substation; and administering the adapted substation data on a communication channel of the target substation. The substation system can include a base substation which is an existing, a pre existing, or a target substation, or a substation defined by a user or any combination thereof; a substation automation system; test equipment configured to test the system and perform simulation in a target substation; and a human machine interface for interfacing the substation system with a user.

Abstract: A component feeder including a bulk storage container for storage of components, and a lift for elevating a selection of components from the container, the lift being located inside the container. The feeder further includes a transfer arrangement for transferring elevated components from the lift onto a component pick surface on which the components are distributed in order to be picked by a tool or by a hand, and a plate configured to include the component pick surface. Further described is a component feeder system including at least one component feeder, a camera for monitoring the component pick surface and a processor used to control an industrial robot to pick pickable components lying on the pick surface. A corresponding method is also described.

Abstract: A modular voltage source converter (100) comprises a plurality of cells conformal to a basic cell design comprising a first and a second terminal, a capacitor and at least two switches arranged in a half-bridge or full-bridge configuration. In the converter, a first group is formed by a number n of cells (101-k, k=1, . . . , n) connected serially at their terminals, and a second group is formed by an equal number n of cells (102-k, k=1, . . . , n) connected serially at their terminals. The terminals of the cells (101-k) in said first group are connected, via a resistive or inductive connection element (110-k), to the terminals of corresponding cells(102-k) in said second group.

Abstract: A tap changer for connection to a regulating winding of a rated regulation voltage is provided. The tap changer having a linear tap selector having at least one current collector and a linear arrangement of fixed contacts. Tap changer further includes a shielding structure arranged to shield the tap selector from an external electrical field. The shielding structure includes: a first shielding part arranged to be electrically connected to a current collector; and a second shielding part formed at least partly by the fixed contacts. The first and second shielding parts are separated so that the distance between the first and second shielding parts reaches or exceeds the rated regulating voltage insulation distance of the tap changer.

Abstract: An arrangement for controlling the electric power transmission in a high voltage direct current, HVDC, power transmission system includes at least one HVDC transmission or distribution line for carrying direct current, DC, and the arrangement includes an apparatus connectable to the HVDC transmission or distribution line, the apparatus being arranged to control the direct current of the HVDC transmission or distribution line by introducing a DC voltage in series with the HVDC transmission or distribution line. The arrangement includes a protection device for protecting the apparatus against over-current or overvoltage occurrences. The protection device includes a bypass device connectable to the HVDC transmission or distribution line and connected in parallel with the apparatus. The bypass device is arranged to be in a non-conducting mode and arranged to be set to a conducting mode.

Abstract: A system for protecting, monitoring, and controlling multiple elements of a high voltage power transmission and distribution system. An intelligent electronic device includes at least one display including a human machine interface configured to display information regarding the multiple elements of the high voltage power transmission and distribution system over a plurality of control screens of the intelligent electronic device and to control the multiple elements of the high voltage power transmission and distribution system.

Abstract: An exemplary method for engineering a Distributed Control System (DCS) having at least one Input/Output device and at least one controller that are communicatively connected. A user is prompted to request an application type and select a variant from one or more variant options, at least one device is identified from a plurality of devices available in the DCS, selecting at least one function block including function fragments from a library based on the user input, instances of function fragments are created and at least one instance of function fragments is arranged based on the at least one identified device from the plurality of devices and configuring the at least one identified device based on the created instances of function fragments. The selected solution variant option is determined from the arranged function fragments and changes are made dynamically to satisfy one or more identified DCS conditions.

Abstract: A method for engineering and configuration of one or more IEDs for a function in a substation automation system is disclosed. Also disclosed is a configuration wizard for implementing the method. The method includes creating pre-defined type definitions for an application function, providing a selectable menu for selection of appropriate parameters with respect to the application. Using these parameters and the pre-defined type definitions. The method includes creating process configuration outputs for the application function, and configuring the one or more IEDs based on the process configuration outputs.

Abstract: A retrofit assembly and method of retrofitting a circuit breaker in a switchgear are described. The retrofit assembly can includes one or more adjustable elements for fitting a circuit breaker into a switchgear panel of the switchgear. The adjustable elements can include a plurality of adjustable modular female tulip contacts to receive a corresponding plurality of male contacts in a panel of the switchgear, each female tulip contact being flexible for a plurality of diameters, a plurality of modular phase adjustment contact arms to provide phase alignment between the poles of the circuit breaker, and/or an adjustable truck for placing the circuit breaker in contact with a rack for the circuit breaker in the switchgear.

Abstract: A system includes a robot, comprising a manipulator and a controller, with a gripper mounted on the manipulator, for picking the battery for testing and sorting, a battery holding section for receiving batteries for testing and sorting at predetermined locations in the battery holding section, and a testing section disposed within the working range of the robot, for testing an electrical condition of the battery for testing and sorting, whereby the controller controls the manipulator and the gripper to first-pick the battery for testing and sorting at the predetermined location from the battery holding section and place it to contact the testing section for testing, the testing section tests the battery and sends to the controller a signal indicating the electrical condition of the tested battery, and the controller controls the manipulator and the gripper to second-pick the battery contacting the testing section and sort it according to the signal.

Abstract: Among other things, one or more techniques and/or systems are provided for generating a health profile of an industrial asset based upon data pertaining to such an industrial asset. The health profile describes an expected condition of the industrial asset during a prediction period, a predicted cause of the expected condition, and/or a predicted impact of the expected condition. In some embodiments, the health profile is generated using a model that is configured to be periodically and/or intermittently updated. Further, in some embodiments, a diagnostic profile may be generated describing diagnostic actions that may be taken to improve predictions included within a health profile and/or to improve a confidence in one or more of those predictions.

Abstract: A high voltage arrangement for a high voltage power system has an insulating structure which reduces the creep path. The insulating structure is arranged around the second conductor and has a continuous extension in an axial direction from a first end thereof providing insulation of essentially the entire length of the second conductor to a second end around the bushing portion, which second end extends around the bushing portion at least to a point where an electric potential of an external surface of the bushing portion is at most equal to the average of the potential of the first conductor and the potential of the interfacing plane when the high voltage arrangement is in use.

Abstract: A method, a substation automation apparatus and an intelligent electronic device (IED) are disclosed which are, for example, not limited only to publishing data (data emanating) from the IED. An exemplary method includes assigning a unique identifier to one or more data fields, where the one or more data fields is associated with a short address attribute in the data emanating from the intelligent electronic device; and dynamically updating the identifier based on user specific configuration data by an IED application configuration tool. The IED can include a list of functions; (e.g., each function being represented as a logical node; and each logical node containing data objects); and a flexible addressing scheme for configuring the data objects and publishing data from the IED, but not only data emanating from IED.

Abstract: A high voltage gas isolated bushing including a tubular shell with an end flange at each end of the shell creating an enclosed volume, a conductor suspended in the enclosed volume, having two ends, one end fixed to one end flange at a first fixation point and the other end fixed to the other end flange at a second fixation point. At least one of the end flanges is provided with a support body extending into the enclosed volume in the longitudinal direction of the bushing, and the body is arranged to support the conductor on at least one support point at a distance from the fixation point on the flange.