CAJ | 학술논문

阐述了变压器直流偏磁产生的原因，介绍了由地磁扰动引起的地磁感应电流和直流输电产生的地中直流，研究了直流偏磁对变压器的影响，并通过对酒泉地区变压器偏磁电流、振动以及噪声进行测试和分析，证实了变压器直流偏磁的严重程度受偏磁电流大小的影响。依据实测结果，比较了两种中性点直流电流测量方法，认为电阻法适合测量中性点单点接地的变压器，而传感器法适合测量中性点有多个接地点的变压器。
천술료변압기직류편자산생적원인，개소료유지자우동인기적지자감응전류화직류수전산생적지중직류，연구료직류편자대변압기적영향，병통과대주천지구변압기편자전류、진동이급조성진행측시화분석，증실료변압기직류편자적엄중정도수편자전류대소적영향。의거실측결과，비교료량충중성점직류전류측량방법，인위전조법괄합측량중성점단점접지적변압기，이전감기법괄합측량중성점유다개접지점적변압기。
Description was made on the causes of transformer DC magnetic bias generation and introduction was made to grounding magnetic in-duction current caused by grounding magnetic disturbance and grounding current caused by DC transmission. This paper studied impact of DC mag-netic bias on transformer and carried out measurements and analysis for Jiuquan area transformer magnetic bias current, vibration and noises, which proved that the severity degree of transformer DC magnetic bias was depended on the magnetic bias current value. According to actual measurement result, this paper compared two kinds of neutral point grounding DC current measurements methods. It is considered that resistance method is better for transformer with neutral point single grounding and sensor method is better for neutral point with multiple grounding transformers.