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CALCULATIONS OF GENERATOR SOURCE SHORT- CIRCUIT CURRENT ACCORDING TO ANSI/IEEE AND IEC STANDARDS, WITH EMTP VERIFICATIONS

机译:根据ANSI / IEEE和IEC标准的发电机源短路电流计算,具有EMTP验证

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For the interruption of a large generator source-short-circuit current, a current zero may not be obtained at the contact parting time of the circuit breaker. Large generators which have high X/R ratio, and depending upon the relative impedances and time constants the dc component can be higher than the dc decaying component delaying the occurrence of current zero well beyond contact parting time of the circuit breaker. The subject is well addressed in the current literature, though not the calculations of it. This paper presents calculations of a large practical generator using ANSI/IEEE and IEC standards with verifications of results using EMTP. It demonstrates large differences which impact the selection of generator circuit breaker interrupting duties.
机译:为了中断大发电机源短路电流,可以在断路器的接触分散时间处获得电流零点。具有高X / R比的大发电机,并且取决于相对阻抗和时间常数DC分量可以高于DC衰减组件延迟电流零点的发生超出断路器的接触分离时间。该主题在目前的文献中得到了很好的解决,但不是计算的计算。本文介绍了使用ANSI / IEEE和IEC标准的大型实用发生器的计算,并使用EMTP验证结果。它展示了影响发电机断路器中断职责的巨大差异。

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