电厂接地网阴极保护牺牲阳极保护措施防腐
一、接地网的组成
接地网是维护电力系统安全可靠运行、**运行人员安全的重要措施，其较重要的功能就是将故障电流安全地引入地下，限制故障电位上升，控制地表电位梯度以限制跨步电势和接触电势在安全值内。
 发电厂的接地网是由若干接地井和相互连通的扁钢组成，遍布各个厂房和室外配电装置的地下，确保接地良好，即使在部分接地扁钢锈断的情况下，也可以使接地电阻保持在规范之内。
一般将接地系统分为：
　　1、工作接地
　　2、系统接地
　　3、防雷接地
　　4、保护接地
二、电厂接地网阴极保护牺牲阳极保护措施防腐
目前接地网材质分为镀锌扁钢与铜接地方式
电厂接地网根据材质不同、土壤电阻率不同来设计不同的阴极保护材料，接地系统的防腐大部分是涂料加阴极保护为主，因为接地网的面积大且绝缘性的问题，接地网的阴极保护方式主要是牺牲阳极为主。

Cathodic protection and sacrificial anode protection measures for grounding grid of power plant
1、 Composition of grounding grid
The grounding grid is an important measure to maintain the safe and reliable operation of the power system and ensure the safety of operators. Its most important function is to safely introduce fault current into the ground, limit the rise of fault potential, and control the surface potential gradient to limit the step potential and contact potential within the safe value.
The grounding grid of the power plant is composed of several grounding wells and interconnected flat steel, which are distributed under the ground of each plant and outdoor power distribution device to ensure good grounding. Even if some grounding flat steel is rusted and broken, the grounding resistance can be kept within the specification.
The grounding system is generally divided into:
1. Working grounding
2. System grounding
3. Lightning protection grounding
4. Protective grounding
2、 Cathodic protection and sacrificial anode protection measures for grounding grid of power plant
At present, the grounding grid material is divided into galvanized flat steel and copper grounding
Different cathodic protection materials are designed for the grounding grid of the power plant according to different materials and soil resistivity. Most of the anti-corrosion of the grounding system is mainly coating plus cathodic protection. Because of the large area and insulation of the grounding grid, the cathodic protection mode of the grounding grid is mainly sacrificial anode.

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