Pulsed electric discharge device

A device for pulsed electric discharge in a liquid, said device comprising at least a pair of electrodes, configured to be immersed in said liquid, and a voltage generator capable of applying a heating voltage between the electrodes of said at least one pair of electrodes for a so-called “heating” period in order to heat the liquid until a pulsed electric discharge is caused in said liquid, said device being characterized in that it further comprises a control module configured to:

• control the voltage generator from a predetermined heating voltage set point so that said voltage generator applies a heating voltage between the electrodes of said at least one pair of electrodes during the heating period until a pulsed electric discharge is obtained between said electrodes,
• measure the voltage across the electrodes in order to determine the breakdown voltage at which the pulsed electric discharge occurred,
• estimate the quantity of energy supplied to the liquid during the heating period, so-called “quantity of heating energy”, from the predetermined heating voltage set point and the breakdown voltage measured,
• determine a new heating voltage set point to be applied between the electrodes of said at least one pair of electrodes at the next pulsed electric discharge from the heating energy quantity estimated and a predefined breakdown voltage set point.