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江西省天然气有限公司所辖管道存在多处与高压输电线路或电气化铁路相邻的情况,为了全面评价管道的交流干扰风险,参照欧洲标准DD CEN-TS 15280-2006及国家标准GB/T 50698-2011,进行了交流干扰的初步检测和详细检测,检测参数包括交流干扰电压、交流电流密度、交直流电流密度之比及土壤电阻率。选取交流干扰严重位置,通过开展现场缓解试验和设计计算,确定了交流干扰防护方案:在干扰严重位置与管道平行铺设锌带缓解线,并在缓解线和管道之间串接去耦合器。设计方案实施后,获得了理想的防护效果,可为同类工程提供参考。(图6,表4,参10)。
Jiangxi Provincial Natural Gas Co., Ltd. under the jurisdiction of the pipeline there are many high-voltage transmission lines or electrified railway adjacent situation, in order to fully assess the risk of pipeline interference, refer to the European standard DD CEN-TS 15280-2006 and the national standard GB / T 50698- 2011, the initial detection and detailed detection of AC interference were carried out. The detection parameters include AC interference voltage, AC current density, AC-DC current density ratio and soil resistivity. The location of serious AC interference was selected. Through the on-site mitigation test and design calculation, the AC interference protection scheme was determined. Lay the zinc strip mitigation line parallel to the pipeline in the serious interference position and connect the decoupling coupler between the mitigation line and the pipeline. After the implementation of the design program, obtained the ideal protective effect, can provide reference for similar projects. (Figure 6, Table 4, reference 10).