新建高压输电线路对管道干扰预测及缓解措施

Prediction and mitigation of AC interference on the pipeline caused by planned HVAC transmission line

为了判断某新建高压输电线路对埋地管道交流干扰程度并采取相应的缓解措施,利用数值模拟技术结合现场测试校正,建立了管道交流干扰计算模型,预测了新建高压输电线路对管道的交流干扰程度,并根据管道周围环境特点设计了深井地床排流缓解措施。测试结果表明:数值模拟计算结果与现场实测结果基本吻合,验证了合理设计深井地床能够有效缓解管道交流干扰的事实。实际工况的复杂性使得计算模型不可能与现场情况完全一致,对于新建输电线路,可利用附近已有的输电线路对计算模型进行校正。

In order to estimate the AC interference degree on the buried pipeline caused by one planned HVAC transmission line and take the mitigation measures corrrespondinly, a computational model for the AC interferfence on the pipeline was established by the numerical simulation technology, combined with field-test correction. Then, by virtue of this model, the AC interference degree of a planned HVAC transmission line on the pipeline was predicted. Finally, the mitigation measure of deepwell grounding bed drainage was designed based on the environmental characteristics around the pipeline. Its effect testing results indicate that the calculation result of numerical simulation is consistent with that of field testing, verifying the accuacy of this technology. It is revealed that the AC interference on the pipeline can be mitigated effectively by designing the deepwell grounding bed rationally. Due to the complexity of the acutal working conditions, however, the computational model cannot present the field completely. Therefore, for the planned HVAC transmission line, its computational model can be corrected by the the AC interference of existing HVAC transmission lines nearby.