以某燃气门站为例，通过资料调研、现场试验及数值模拟确定了该门站的区域阴极保护最优方案。利用数值模拟对门站区域阴极保护中外加电流浅埋分布式辅助阳极地床、深井与浅埋阳极共同防护以及牺牲阳极三种方案进行了计算和效果对比。结果表明：牺牲阳极方案中使用了大量阳极，但大部分管道仍未得到有效保护，另外两种方案都可以使管道得到有效保护。综合考虑现场的实施条件和保护效果，最终选择了外加电流浅埋分布式辅助阳极阴极保护方案。

Taking a gas gate station as an example, the optimized scheme of regional cathodic protection was determined through data investigation, field testing and numerical simulation. Numerical simulation was used to calculate and compare the effects of three schemes in gate area cathodic protection, including impressed current shallow-buried distributed auxiliary anode ground bed, deep well anode and shallow buried anode joint protection, and sacrificial anode. The results show that a large number of anodes were used in the sacrificial anode scheme, but most of the pipelines were still not in effective protection, while the other two schemes could protect the pipelines effectively. Considering the implementation conditions and protection effect, the cathodic protection scheme of impressed current shallow-buried distributed auxiliary anode was finally selected.