Evdoshenko L. Improvement of High-Voltage Spark Dischargers with Variable Electrical Strength for Electrotechnological Plants

The object of investigation - electromagnetic processes in pulsed generators of high voltage and heavy current for electrotechnological plants. The methods of investigation - foundations of electromagnetic field theory and plasma physics, statistical processing of results and planning an experiment. The theoretical and practical results: the use of the spark dischargers with incomplete recovery of electrical strength in the high-frequency switching mode was substantiated; the relations for calculation of the number of discharging channels in the mode of multichannel switching were obtained; the multigap, high resource discharger with increased switching frequency and 400 kV trigatrons intended for parallel switching on with nanosecond accuracy were developed and created. The novelty - the resistive model of electric strength recovery of discharging gap for the mode of high-frequency switching is developed; for the first time, the limiting frequency of switching for air atmospheric pressure multigap discharger with rational length of gaps 0.25 - 0.3 mm was determined, it equals 27 000 discharges per second; for the first time, parallel switching on with nanosecond accuracy of 48 trigatrons on 400 kV with control electrode installed in high-voltage main electrode of positive polarity was realized. The level of introduction - the results of research were introduced by RDC 'Adron' (t. Kiev), enterprise 'Proton-21' (t. Kiev), RDI 'Molniya' of NTU 'KhPI', in training process in NTU 'KhPI'. The field of application - development and use of spark dischargers for electrotechnological plants.