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首页> 外文期刊>Russian electrical engineering >An Imitation Model of a Power-Supply System of Oxygen-Converter Manufacturing to Analyze Switching Overvoltage
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An Imitation Model of a Power-Supply System of Oxygen-Converter Manufacturing to Analyze Switching Overvoltage

机译：氧转换器制造电源系统的仿真模型，用于分析开关过电压

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摘要

This paper considers switching overvoltage that occurs in the power-supply system of oxygen-converter manufacturing when a circuit vacuum breaker is triggered. The particular features of such systems are analyzed, and a typical power supply scheme is considered. It is noted that overvoltage manifesting a high-frequency behavior can be produced as a result of the peculiarities of arc interruption in vacuum (current chopping, voltage escalation, and arc reignition). Such overvoltage negatively affects electric motors with insulation that have the lowest margin of dielectric strength. Conventional means of overvoltage protection-such as conventional spark-gapped arresters, metal-oxide surge arresters, and spark gaps-are inefficient at high-frequency overvoltage because of a sharp increase in their voltage-second characteristics at low pulse duration. This paper suggests using RC circuits as protection from such overvoltage. Their application is accompanied by quite exact simulations since an incorrect choice of their parameters can worsen the commutation process. The main particular features of construction of a simulation model to study switching overvoltage and to analyze protection functioning are considered. A depiction of the simulation model and results of simulations are also presented. The validity of the suggested model is determined.
机译：本文考虑了触发电路真空断路器时在氧气转换器制造的电源系统中发生的开关过电压。分析了此类系统的特殊功能，并考虑了典型的电源方案。注意，由于真空中电弧中断的特殊性（电流斩波，电压升高和电弧再点燃），可能会产生表现出高频行为的过电压。这种过电压会对绝缘性能最低的绝缘强度的电动机产生负面影响。常规的过电压保护手段（如常规的火花隙避雷器，金属氧化物电涌放电器和火花隙）在高频过压时效率低下，因为它们在低脉冲持续时间内的电压-秒特性急剧增加。本文建议使用RC电路来防止这种过电压。它们的应用伴随着相当精确的仿真，因为错误选择其参数会恶化换向过程。考虑了构建用于研究开关过电压和分析保护功能的仿真模型的主要特点。还介绍了仿真模型和仿真结果。确定所建议模型的有效性。

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