核电厂中压电气贯穿件短路电动力试验探讨
郑开云
（上海发电设备成套设计研究院，上海 200240）
摘 要：核电厂中压电气贯穿件为安全壳内反应堆冷却剂泵电机提供三相交流电源，设备设计和鉴定中应考虑可能发生的单相、两相和三相短路故障。根据中压电气贯穿件的结构特点和相关鉴定标准，对比分析了中压电气贯穿件可能发生的两相和三相短路的电动力，并探讨了短路电动力试验方法。分析结果表明：中压电气贯穿件发生三相短路的电动力较大，中压电气贯穿件应进行三相短路试验；短路试验电路的X /R 值和合闸相角对于短路电动力都有影响；在进行短路试验时应调整试验电路参数，确保至少其中某一相导体的短路电流达到最大短路电流峰值，从而使电动力达到预期目标值。
关键词：核电厂；中压电气贯穿件；电动力；短路试验
中图分类号：TM623 文献标识码：A 文章编号：1007-3175(2017)06-0051-04
Discussion on Short-Circuit Electromotive Force Testing of Medium-Voltage
Electric Penetration Assembly in Nuclear Power Plant
ZHENG Kai-yun
（Shanghai Power Equipment Research Institute, Shanghai 200240, China）
Abstract: The medium-voltage electric penetration assembly in nuclear power plant provides three-phase AC power source for the reactor coolant pump dynamo inside the containment. In the design and appraisal of equipment, consideration should be made for the possible happened one-phase, two-phase and three-phase short-circuit faults. According to the structure feature of medium-voltage electric penetration assembly and the related appraisal standard, this paper compared and analyzed the two-phase and three-phase short-circuit electromotive forces possibly happened in medium-voltage electric penetration assembly and probed the testing method. The analysis result shows that the electromotive forces of three-phase short-circuit are larger in medium-voltage electric penetration assembly. The medium-voltage electric penetration assembly should be subjected to three-phase short-circuit test. The X/R value of short-circuit testing circuit and the closing phase angle have effects on the short-circuit electromotive force. The testing circuit parameters should be adjusted before short-circuit testing, so as to make sure that at least one phase reaches the peek short-circuit current and then the electromotive forces reach the expected target value.
Key words: nuclear power plant; medium-voltage electric penetration assembly; electromotive force; short-circuit testing
参考文献
[1] IEEE Std 317-2013 IEEE Standard for Electric Penetration Assembliesin Containment Structures for Nuclear Power Generating Stations[S].
[2] IEEE Std C37.09-1999 IEEE Standard Test Procedure for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis[S].
