Two solid-state bipolar Marx modulators are compared in terms of semiconductors overvoltage tolerance capability in abnormal operating conditions such as switching synchronization failure. Simulation results are presented for 4 stages of two Marx circuits using 500 V per stage with 1 kHz bipolar pulse repetition rate, with 5 μs pulse width and 10 μs relaxation time into resistive load.

An overview of overcurrent and overvoltage CSI faults is presented and strategies, how to protect a CSI equipped with IGBT power switches against these failures are developed and explained. The shown strategies and the related circuits are applicable at low expense and require only minor changes in the CSI and its control.

The grounding grid of power equipment is the most basic overvoltage protection device for system. Before design and construction grid, system generally uses a scaled-down model to verify characteristics grid. As types structures materials become more complex, there are one or similar items in simulation test that cannot be scaled down. This paper takes similarity new type material-flexible grap...

Abstract For suppress the amplitude of overvoltage from HVDC sending terminal, an suppression scheme based on principle controllable energy dissipation was proposed. The mechanism a weak AC system under fault DC analyzed, and method operating CSREDD were Prototype develop tested, which proved correctness about design. device has been successfully applied to ±800kV Lu-Gu UHVDC transmission proje...

Abstract -- Overheating is one of the causes damage or decreased performance on vehicle. This can occur due to a lack water in radiator leak. Generally, overheating occurs vehicles manufactured before 2000 because they do not have protection warning case excessive temperature. Vehicles with production years usually only temperature indicator form pointer scale. In addition overheating, voltage ...

Due to the shortcomings of commercial filters and non-linear components for overvoltage protection in conditions synergy neutron gamma radiation functional aging, behavior hybrid circuit under same was examined. In order experimental procedure correspond as closely possible real situation, load not adjusted by impedance. The standard model recommended accordance with IEC 1.3 is simulated using ...

This paper evaluates different scenarios of single-phase faults in the medium voltage system operating island and supplied by distributed generation (DG) with synchronous generator steady state, observing resulting overvoltages due to delta connection primary coupling transformer. In this context, present document proposes contribute technical issues related DG, presenting a series simulations ...