title: ÐÐ¾Ð»ÑÐ¿ÑÐ¾Ð²Ð¾Ð´Ð½Ð¸ÐºÐ¾Ð²Ð¾Ðµ ÑÑÑÑÐ¾Ð¹ÑÑÐ²Ð¾ ÐºÐ¾Ð¼Ð¼ÑÑÐ°ÑÐ¸Ð¸ Ð´Ð»Ñ Ð²ÑÑÐ°Ð²ÐºÐ¸ Ð¿Ð¾ÑÑÐ¾ÑÐ½Ð½Ð¾Ð³Ð¾ ÑÐ¾ÐºÐ° 120 ÐºÐ, 800 Ð
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Solid state switching device for HVDC back-to-back station, 120 kV, 800 A
Creators: name: Ð¡Ð°ÑÐ¾Ð½Ð¾Ð², ÐÐ²Ð³ÐµÐ½Ð¸Ð¹
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2019
Subjects: Ð­Ð»ÐµÐºÑÑÐ¸ÑÐµÑÐºÐ¸Ðµ Ð»Ð¸Ð½Ð¸Ð¸ Ð¿ÐµÑÐµÐ´Ð°ÑÐ¸ Ð²ÑÑÐ¾ÐºÐ¾Ð²Ð¾Ð»ÑÑÐ½ÑÐµ
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Ð´ÐµÐ¼Ð¿ÑÐ¸ÑÑÑÑÐ¸Ðµ rc-ÑÐµÐ¿Ð¸
Ð³ÑÐ¾Ð·Ð¾Ð²ÑÐµ Ð¸Ð¼Ð¿ÑÐ»ÑÑÑ
Ð½Ð°ÑÑÑÐ°ÑÑÐ¸ÐµÑÑ ÑÐµÐ°ÐºÑÐ¾ÑÑ
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description: In the work the analysis of existing world experience and applied solutions on the subject of "Solid state switching device for HVDC". The analysis of switching-off of the Solid state switching device (valve) taking into account the features of physics of semiconductor structures is carried out. Based on this analysis, a new method for calculating the parameters of damping RC-circuits is proposed. It is shown that the reverse currents of the thyristor have a
significant effect on the level of overvoltage when the valve is disconnected. Numerical estimates of this effect are given. Also demonstrated the mathematical
model and method of calculation of the capacities of the structural elements of the valve unit of the inverter bridge by means of computer simulation in Comsol. The
electric equivalent circuit of calculation for measurement of influence of a thunderstorm impulse of overvoltage on the valve equipment is offered. These calculations showed that the new design of the valve Vyborg Converter complex
are able to withstand the storm pulse without accidents. It was shown that the transient process of switching on the valve occurs at high frequencies of the order of 50-60 kHz, which can be dangerous for the operation of the thyristor. The paper analyzes the ability of the saturating reactor to dampen high-frequency current oscillations due to eddy current losses. Using the obtained data of transients, with
the help of computer simulation methods in the Comsol medium, calculations of energy losses in the thin structures of the steel sheets of the saturating reactor were carried out, which gave a numerical assessment of the effect of these losses on the transition process. Based on this, a modification of the electrical equivalent circuit of the semiconductor valve was proposed, which allows to assess the impact of these processes on the operation of the semiconductor Converter.