关于发电机定子绕组绝缘电阻测量及最低允许值的分析

发电机定子绕组绝缘电阻测量是诊断定子绕组绝缘状态常用的有效方法之一，但现有国内外标准中对其最低允许值的规定及不同温度下绝缘电阻的换算关系存在较在羝异，使现场无法真实了解绝绝状态。章对美国、前苏联及国内有关标准中绝缘电阻最低允许值的与不同温度下绝缘电阻的换算作了系统比较，并归算到同一换算公式以说明绝电阻的换算作了系统比较，并归算到同一换算公式以说明差异程度。中还推导出合理的最低允许值及不同温度下

INSULATION RESISTANCE MEASUREMENT OF GENERATOR STATOR WINDING AND ANALYSIS OF ITS MINIMUM ALLOWABLE VALUE

The insulation resistance measurement of generator stator winding is one of the effective methods to diagnose the insulation state of the winding being tested. There are still great difference between domestic and foreign standards on the stipulation including the minimum allowable value of insulation resistance and the conversion relation of insulation resistance at different temperatures, so that it is impossible to determine the real insulation state on site. Based on the above mentioned various minimum allowable values and conversion relations of insulation resistance, a systematic comparison is presented in this paper, and then, the reasonable minimum allowable value and conversion relation have been recommended by domestic and foreign experiences, in addition, relevant domestic standards have been suggested.