The article analyses original methods of DGA fault diagnose, include three-ratio method, artificial neural network method, Fuzzy Theory, diagnosing expert system, grey relational algorithm, et.
本文分析了原有的DGA故障诊断方法，包括三比值法、人工神经网络法、模糊理论、变压器诊断专家系统、灰色关联算法等。
However, there are two different viewpoints for DGA method to diagnose power transformer fault position.
然而，对于采用DGA来诊断电力变压器故障部位的方法，目前仍存在能与不能两种观点。
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