A system and method for maintaining electrical stability of a high-voltage transmission power system in response to a fault. The method includes detecting the fault, opening a switch to clear the fault, performing a first pulse test for a predetermined duration of time to determine if the fault is still present, preventing a reclosing operation from occurring if the pulse test indicates that the fault is still present, and allowing the reclosing operation to occur if the first pulse test indicates that the fault is not present. One or more subsequent pulse tests can be performed if the first pulse test is inclusive about the persistence of the fault, where the reclosing operation is prevented from occurring if the pulse tests indicate that the fault is still present and the reclosing operation is allowed if the pulse tests indicate that the fault is no longer present.

A system and method for maintaining electrical stability of a high-voltage transmission power system in response to a fault. The method includes detecting the fault, opening a switch to clear the fault, performing a first pulse test for a predetermined duration of time to determine if the fault is still present, preventing a reclosing operation from occurring if the pulse test indicates that the fault is still present, and allowing the reclosing operation to occur if the first pulse test indicates that the fault is not present. One or more subsequent pulse tests can be performed if the first pulse test is inclusive about the persistence of the fault, where the reclosing operation is prevented from occurring if the pulse tests indicate that the fault is still present and the reclosing operation is allowed if the pulse tests indicate that the fault is no longer present.

A pulse generator for generating an HPEM pulse includes a Marx generator having a plurality of capacitors that are connected in series between two output poles, providing a Marx voltage between the output poles during operation of the Marx generator. A DS resonator has two input poles and each of the input poles is connected to a respective one of the output poles by a respective supply line. The capacitors are physically disposed along a profile line having two ends at each of which a respective one of the output poles is located. A distance between the output poles is smaller than a longitudinal extent of the Marx generator along the profile line.

A downhole explosive detonation comprises a high voltage electro-explosive initiator comprising an input high voltage power supply with a low impedance shunting fuse, a flexible electrical link and a capacitor discharge unit. Explosive is initiated in a direction approximately parallel, or in another version perpendicular to the capacitor discharge unit. A unique configuration and construction of the assembly allows installation through a small service port in the gun housing structure for more efficient gun arming. A real time downhole voltage monitoring is described that transmits voltage readings to the surface during a firing sequence.

A pharmaceutical composition is provided comprising a highly soluble arsenic carbonate and/or bicarbonate compound and which is useful in the treatment of a variety of cancers, including acute promyelocytic leukaemia. The arsenic carbonate and/or bicarbonate salt acts as a solid, and so orally deliverable, improved bioequivalent delivery form of arsenic trioxide IV solutions.

A triggerable spark gap, a switching circuit and a method for manufacturing a triggerable spark gap are disclosed. In an embodiment, a triggerable spark gap includes a trigger electrode, an adjacent electrode at the trigger electrode, a counter electrode and a gap between the counter electrode and the adjacent electrode, wherein a distance between the trigger electrode and the adjacent electrode is less than a distance between the trigger electrode and the counter electrode, wherein the distance between the trigger electrode and the counter electrode is less than a distance between the adjacent electrode and the counter electrode, wherein the counter electrode and/or the adjacent electrode includes a first phase including a first material and a second phase including a second material, and wherein the second material has a lower electron work function than the first material.

To obtain an impact wave by generation of arc discharge between a high-voltage-side electrode 31 connected to a high-voltage-side terminal of a pulse power generating device and a low-voltage-side electrode 32 grounded or connected to a low-voltage-side terminal of the power source. One of the high-voltage-side electrode 31 or the low-voltage-side electrode 32 is an annular electrode formed in an annular shape, the other electrode is a core electrode arranged inside the annular electrode, and arc discharge is generated between an inner peripheral portion of the annular electrode and an outer peripheral portion of the core electrode.

To obtain an impact wave by generation of arc discharge between a high-voltage-side electrode 31 connected to a high-voltage-side terminal of a pulse power generating device and a low-voltage-side electrode 32 grounded or connected to a low-voltage-side terminal of the power source. One of the high-voltage-side electrode 31 or the low-voltage-side electrode 32 is an annular electrode formed in an annular shape, the other electrode is a core electrode arranged inside the annular electrode, and arc discharge is generated between an inner peripheral portion of the annular electrode and an outer peripheral portion of the core electrode.

The present invention concerns a device for pulsed electric discharge in a liquid comprising a control module configured to control a voltage generator such that the voltage generator applies a predetermined heating voltage setpoint between electrodes during a heating period until a pulsed electric discharge is obtained between the electrodes, in order to measure the breakdown voltage during the pulsed electric discharge, in order to estimate the quantity of energy supplied to the liquid during the heating period, referred to as the “quantity of heating energy”, from the predetermined heating voltage setpoint and the measured breakdown voltage, and in order to determine a new heating voltage setpoint to apply between the electrodes of the at least one pair of electrodes at the next pulsed electric discharge based on the estimated quantity of heating energy and a predefined breakdown voltage setpoint.

The present invention relates to a device for pulsed electric discharge in a liquid, said device comprising at least one pair of electrodes which are configured to be immersed in said liquid and to generate an electric arc in said liquid when a predetermined voltage is applied between said electrodes, at least one heating unit which is configured to heat said liquid for a heating time, at least one discharge unit which is configured to apply a discharge voltage between the electrodes of the at least one pair of electrodes, and at least one control unit which is configured to control the at least one heating unit so that said heating unit heats the liquid for the heating time and to control, at the end of said heating time, the at least one discharge unit so that said at least one discharge unit applies the predetermined voltage between the electrodes of the at least one pair of electrodes and thus generates an electric discharge in the liquid.