通过风洞试验的方法研究了不同悬式瓷绝缘子串和悬式复合绝缘子串的阻力系数在均匀流中随不同风速、风攻角、分裂间距的变化规律。试验模型选用实际绝缘子串节段加工而成，具有实际绝缘子串的粗糙表面。试验结果表明：中国规范、IEC标准和欧盟规范对输电线路中的普通绝缘子串和复合绝缘子串采用相同的体型系数是不合理的；在两种类型的多联绝缘子串中，上风向绝缘子串对下风向绝缘子串的尾流干扰角度范围差异较大且下风向绝缘子串受屏蔽效应明显，规范中应考虑上风向绝缘子串在不同风攻角下的屏蔽效应；在多联绝缘子串中，分裂间距的变化对下风向绝缘子串阻力系数影响明显，下风向绝缘子串的阻力系数随分裂间距的增大而增大，其中下风向的悬式复合绝缘子串阻力系数受分裂间距影响程度大于悬式瓷质绝缘子串。

The wind tunnel tests were carried out to obtain the variation law of the drag coefficient of suspension porcelain insulator strings and suspension composite insulator stings with different wind velocities, wind attack angles, bundle spaces. The test models are made of the actual insulator strings and have the real rough surface. Test results show that it is unreasonable to calculate the wind load of the common and composite insulator strings with a same drag coefficient in the codes. In the two types of multiple-insulator strings, the range of the wake interference angle between the windward insulator strings and the leeward insulator strings is different. The leeward insulator strings is obviously shielded by the windward insulator strings. The shielding effect of the windward insulator strings should be considered at different wind attack angles. In the multiple-insulator strings, the variation of the bundle space has an obvious influence on the drag coefficient of the leeward insulator strings. The drag coefficient of the leeward insulator strings increases with the increase of the bundle distance. The influence degree of the drag coefficients of the leeward composite insulator strings caused by the variation of bundle space is greater than that of suspension porcelain insulator stings.