核電廠中壓電氣貫穿件短路電動力試驗探討
鄭開云
（上海發電設備成套設計研究院，上海 200240）
摘 要：核電廠中壓電氣貫穿件為安全殼內反應堆冷卻劑泵電機提供三相交流電源，設備設計和鑒定中應考慮可能發生的單相、兩相和三相短路故障。根據中壓電氣貫穿件的結構特點和相關鑒定標準，對比分析了中壓電氣貫穿件可能發生的兩相和三相短路的電動力，并探討了短路電動力試驗方法。分析結果表明：中壓電氣貫穿件發生三相短路的電動力較大，中壓電氣貫穿件應進行三相短路試驗；短路試驗電路的X /R 值和合閘相角對于短路電動力都有影響；在進行短路試驗時應調整試驗電路參數，確保至少其中某一相導體的短路電流達到最大短路電流峰值，從而使電動力達到預期目標值。
關鍵詞：核電廠；中壓電氣貫穿件；電動力；短路試驗
中圖分類號：TM623 文獻標識碼：A 文章編號：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
參考文獻
[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].
