Abb S.p.a.

Abb Research Ltd.

Enrico Ragaini

James Stoupis

Dmitry Ishchenko

Alexandre Oudalov

Pierantonio Arrighetti

Antonio Fidigatti

Federico Silvestro

Emilio Battista Locatelli

Daniele Angelosante

Fabio Monachesi

Fabio D'Agostino

Marco Carminati

Luca Milani

Andrea Morini

Alessandro De Danieli

Lorenzo Fagiano

A method for identifying a fault event in an electric power distribution grid sector including one or more electric loads and having a coupling node with a main grid, at which a grid current adsorbed by said electric loads is detectable. The method allows determining whether a detected anomalous variation of the grid current, adsorbed at the electric coupling node, is due to the start of a characteristic transitional operating period of an electric load or is due to an electric fault.

Method for identifying a fault event in an electric power distribution grid sector

An electrical quantity measuring system includes an electrical circuit of an electrical distribution network and an electrical quantity measuring apparatus. The apparatus includes a synchronization module structured to generate a synchronization signal; and a first measurement apparatus connectable to an electrical circuit and structured to receive the synchronization signal and provide a first Fourier transform coefficients representing a first electrical quantity associated with the electrical circuit and a first delay value depending on a time offset between a measurement instant associated with the measure of the first electrical quantity and a reception instant of the synchronization signal at the first measurement apparatus. The measuring apparatus also comprises a processing module structured to process the first Fourier transform coefficients and the first delay value and provide first time-shifted Fourier transform coefficients representing a first synchronized measured electrical quantity.

Electrical quality measuring apparatus and electrical quality measuring method

Method for controlling an electric power distribution micro-grid, the micro-grid comprising: an electric coupling node that said micro-grid is electrically disconnectable from an electric power distribution main grid; one or more electric loads, each consuming a corresponding amount of electric power provided by the micro-grid, the electric loads including one or more disconnectable loads electrically disconnectable from the micro-grid; and at least an electric power source including one or more electric power generators. The method of controlling is carried out in response to the disconnection of the micro-grid from the main grid on a disconnection instant and comprises the following: determining whether the electric disconnection of the micro-grid from the main grid is due to a fault in the main grid; if it is determined that the disconnection of the micro-grid from the main grid is not due to a fault in the main grid, executing a load shedding procedure to disconnect in a selective manner one or more disconnectable loads; if it is determined that the disconnection of the micro-grid from the main grid is due to a fault in the main grid, determining whether a drop of a frequency of the micro-grid is in progress following the disconnection of the micro-grid; and if a drop of frequency is in progress following the disconnection of the micro-grid from the main grid, executing the load shedding procedure.

Method for controlling an electric power distribution micro-grid

The invention relates to a method () for detecting faults in a LVDC electric line () characterized in that it comprises the following steps: In a further aspect, the invention relates to an electronic device () including processing means for carrying out said method.

Method for detecting ground faults in a LVDC electric line and an electronic device thereof

Method of protecting a distribution network with a line interconnecting busbars, each busbar being connectable, by means of switching devices adjacent to the busbar, to the line and to loads and/or generators. The method divides the distribution network in multiple protection areas, each comprises a busbar, a protection device and an area controller. Upon a change in connect status of a distribution feeder line, load or generator connectable to one of the busbar, the logic controller in this protection area re-calculates the short circuit level of the areas. Based on the recalculated short circuit levels, the protection settings of the areas may be adapted. The embodiment also provides a system and computer program product adapted to perform the method.

Adaptive protection for distribution grid based on area concept

The invention relates to a method for managing the load profile of a low or medium voltage electric network that is supplied by at least an electric power source. The electric network comprises one or more electric loads and one or more controllable switching devices for disconnecting/connecting said electric loads from/with said electric power source. The method comprises the step of measuring a time window from a reference instant, the step of determining at least a check instant comprised in said time window and the step of executing a load profile control procedure at said check instant. In a further aspect, the invention relates to a control system for executing the above described method.

Method for managing the load profile of a low or medium voltage electric network and a control system thereof

Growing community of inventors

Bergamo, Italy

Enrico Ragaini