Université Grenoble Alpes

Supergrid Institute

Institut Polytechnique De Grenoble

Université De Paris Xi Paris Sud

Bertrand Raison

Alberto Bertinato

Bruno Luscan

Pascal Tixador

William Leon Garcia

Dieynaba Loume

Nathan Alglave

Paul Verrax

Michel Kieffer

The invention relates to a transient based method for identifying faults in an electric power transmission and/or distribution system () having at least one current transmission line (L, L, L) comprising the following steps: —generation of a physical model of the at least one current transmission line (L, L, L), the physical model depending on the fault parameters and describing the behavior of voltage and/or current transients due to the fault in the at least one current transmission line, fault parameters comprising a fault location parameter on said current transmission line (L, L, L) and a fault impedance parameter, —measurement of voltage and/or currents evolution at least at one specific location in the said power system (), —iterative simulation of the voltage and/or current evolution by the physical model at the measurement point with a set of fault parameters where at each step of iteration, simulated and measured voltage and/or current evolutions are compared and the set of fault parameters is adapted according to a convergence criterion, —identification of a fault with its fault parameters when convergence of the measured voltage and/or current evolutions and simulated voltage and/or current evolutions is reached in a limited number of iterations.

Transient based method for identifying faults in a high / medium voltage electric power transmission system

A control method allows the control of an installation for transmitting electricity comprising a DC transmission network including a group of electricity transmission lines that are linked to one another. The method allows the opening of at least one N-1 safety system, for each safety system being opened, the contribution to the flow of current through the group of transmission lines, originating from the converter station associated with the safety system that is opened, is removed. Furthermore, the method also allows a search for the short-circuit fault in order to identify the faulty transmission line, and an operation, implemented after identification of the faulty transmission line by the search step, of isolating the faulty transmission line by opening the line circuit breakers of the faulty transmission line.

Method for controlling an installation allowing DC current to be transmitted in a network while protecting said network from a short circuit fault

A method of protecting a high-voltage network comprising the steps for maintaining first controlled switches closed and second controlled switches open; measuring voltage and current on high-voltage interfaces; communicating the direction of the current to the other end of a high-voltage line; for each node: identifying a fault; verifying that the current is lower than the current interruption capability of the high-voltage interface switch and opening this switch.

Protection for an HVDC network

An item of interconnection equipment for a high-voltage DC grid includes first and second terminals for connection to first and second lines of a high-voltage DC grid, a third terminal for connection to a local station or a line of the high-voltage grid, a node connected to the first to third terminals, a first superconductor current limiter and a first controlled switch connected in series between the first terminal and the node, a second superconductor current limiter and a second controlled switch connected in series between the second terminal and the node, a third superconductor current limiter and a third controlled switch connected in series between the third terminal and the node, and a current injector configured to inject an electrical current into the node.

Interconnection equipment for a high-voltage DC grid

Growing community of inventors

Lyons, France

Bertrand Raison