沿海发电厂接地方案选择探讨

针对沿海盐碱区域特殊土壤环境接地选择,本文选择一围海造地的煤电厂接地系统设计过程分析作为代表案例。设计方案较全面分析了土壤腐蚀原理以及该区域土壤的腐蚀特性,剖析市场上接地材料在接地环境下防腐蚀性、机械、电化学影响等性能,同时针对该区域土壤环境选材结论,并对接地网采用镀锌钢接地外加阴极保护方案和锌包钢接地方案进行了技术、经济比较。

Discussion on Grounding Solution in Costal Area Power Plant

As special grounding requirement of coastal saline soil area,we take grounding project of a coal-fired power plant as an example,which is built on reclamation fields from the sea.Principle and characteristic of soil corrosion are both considered in this design project,meanwhile,anticorrosion,mechanical and electrochemistry performance of grounding material is analyzed here.According to material selection conclusion in soil condition of this area,we consider two kinds of grounding grid solutions,One of which is zinc-plating steel grounding plus cathodic protection solution,another is zinc-bonded steel grounding solution.Technical and commercial comparision on above two grounding grid solutions are comparised in this paper.