【摘要】 变压器35 kV绕组中性点接地方式较多，现有设计没有对不同接地方式下变压器的防雷措施进行专门考虑，导致变压器35 kV侧雷击事故频发。为了对不同接地方式下变压器35 kV绕组雷电侵入波特性及防治措施进行研究，采用电磁暂态分析软件ATP-EMTP建立仿真模型，对35 kV绕组星形接线的配网变压器和三角形接线的风电场升压变进行了雷电侵入波电磁暂态仿真，分析了导致35 kV绕组绝缘损坏的雷电侵入波特点，考察了不同安装方式下避雷器对雷电侵入波防治的有效性。研究表明不同接地方式下变压器35 kV绕组的雷电过电压特性不同，应根据不同接地方式采取针对性防雷措施。更多还原

【Abstract】 There are many neutral grounding modes in 35 kV winding of transformer, and the existing design does not specially consider the lightning protection measures of transformer under different grounding modes, which leads to frequent lightning accidents on 35 kV side of transformer. In order to study the characteristics and prevention measures of lightning inrush wave in 35 kV winding of transformer under different grounding modes, the electromagnetic transient analysis software ATP-EMTP is used to establish the simulation model, and the electromagnetic transient simulation of lightning inrush wave is carried out for the distribution network transformer with star connection and the step-up transformer of wind farm with triangle connection of 35 kV winding, and the characteristics of lightning inrush wave causing insulation damage of 35 kV winding are analyzed. The effectiveness of lightning arrester to prevent and control lightning inrush wave under different installation modes is investigated. The research shows that the lightning over-voltage characteristics of 35 kV winding of transformer are different under different grounding modes, and corresponding lightning protection measures should be taken according to different grounding modes.更多还原