风电场升压站防雷接地改造措施及仿真分析

Grounding Modification Measures and Simulation Analysis in a Wind Farm Booster Station

针对广东某风电场110 kV升压站使用变压器门型架构上的避雷针用于防护直击雷这一现状,分析了其在防护直击雷方面所存在的一些问题。结合该地区土壤电阻率较高、接地电阻过大这一实际情况,通过对现场的勘查调研,提出了相应的解决措施。该方案采用架设避雷线代替原变压器门型架构上的避雷针用于升压站的直击雷防护,并在升压站设备周围施加GPF-94高效膨润土降阻防腐进行局部冲击优化,然后采取在升压站旁边外接外延地网,并与将1-5号风机地网相连接,用以降低升压站的接地电阻,减小升压站内的雷电冲击电压。利用暂态仿真软件ATP-EMTP对改造前后雷电流对升压站地网的冲击效应进行了仿真分析比较,验证了该方案的有效可行性。

For a wind farm in Guangdong 110 kV booster stations adopting transformer gate type architectural lightning rod used for protective lightning strike the status quo,some problems existing in lightning protection are analyzed. Combined with the region soil resistivity is larger,the realistic situation of grounding resistance is too large,through the investigation and research field of exploration,the corresponding solution measures are put forward. The scheme adopts the erection wire instead of the original transformer gate type architectural lightning rod used for booster station lightning protection,and around the booster station equipment applying GPF-94 high efficient bentonite drag-reducing anticorrosive impact local optimization,and then take the booster station next to an external extension ground network,and connected to network will be 1-5 fan,in order to reduce the grounding resistance of booster station,reduce the booster station lightning impulse voltage. ATP-EMTP transient simulation software was used to transform lightning current before and after the impact on the booster station network effects are compared,and the simulation analysis verified the effective feasibility of the scheme.