| 电力变压器局部放电在线标定的研究 |
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| 引用本文： | 董旭柱,王昌长,王忠东,高胜友,景伟红,郝德智,马卫平,郑良华. 电力变压器局部放电在线标定的研究[J]. 清华大学学报(自然科学版), 1997, 0(4) |
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| 作者姓名： | 董旭柱 王昌长 王忠东 高胜友 景伟红 郝德智 马卫平 郑良华 |
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| 作者单位： | 清华大学电机工程与应用电子技术系，吉林省电力试验研究所 |
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| 摘 要： | 视在放电量的标定是利用脉冲电流法进行变压器局部放电在线监测的前提。传统的离线标定要求被测变压器处于停电状态，实际操作也较麻烦，难以适应在线监测的要求。文中对目前较常用的套管末屏注入在线标定法进行了研究，讨论了降压电感、套管末屏电容和变压器外壳多点接地等对在线标定中方波波形及测量灵敏度的影响。实验室模拟试验和现场试验表明，在工程允许的误差范围内，套管末屏注入的在线标定与离线标定具有可比性，技术上是可行的。
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| 关 键 词： | 变压器；局部放电；离线标定；在线标定 |
Study on on line calibration of partial discharge in power transformers |
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| Abstract: | Calibration of discharge quantity is required for on line monitoring of partial discharge in power transformers. Traditional off line calibration can not meet the requirements of on line monitoring. This paper describes one of usually used on line calibration methods, the pulse injection method through tapping of capacitive bushing. The influences of inductance, capacitance of bushing tapping and multi point grounding of tank on the injected pulse wave and sensibility in on line calibration are discussed. Laboratory simulations and on site tests show that this method is practicable for on line calibration within engineering permissible error range under definite conditions. |
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| Keywords: | power transformer partial discharge off line calibration on line calibration |
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