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Application of Deep-well Cathodic Protection To the Anti-corrosion Grounding Grid Substation

Author: YeHongBo
Tutor: JinZhiJian
School: Shanghai Jiaotong University
Course: Electrical Engineering
Keywords: Transformer substation Ground Resistance Anticorrosive Cathodic Protection Deep anode
CLC: TM862
Type: Master's thesis
Year: 2009
Downloads: 65
Quote: 0
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Abstract


With the power of technology continues to evolve and substation capacity continues to expand, the safe operation of the grounding network requirements are more stringent. The buried ground grid will inevitably be affected by the surrounding soil environment erosion and corrosion , resulting in the grounding performance degradation, as well as electrical equipment on the grid enormous direct and potential damage. Therefore , in order to safe and reliable operation of the grid , it must take the appropriate measures for protection against grounding . In this study, the substation grounding grid analysis of existing protective measures , based on a deep well anode cathodic protection of a substation ground grid for protection. Choose the method of moments to program grounding grid under study and deep anode grounding resistance is calculated , taking into account the pressure drop grounding itself to study the changes in the location of deep well anode potential distribution of grounding grid which designed a a more complete set of substation grounding grid design anticorrosion embodiment , to provide a reference for the on-site implementation . And grounding copper network transformation program technical and economic comparison can be seen : the cathodic protection method against corrosion effect is remarkable , inexpensive , can be applied to the substation grounding grid corrosion renovation project , with a simple construction, costs and economic advantages . Studied the cathodic protection design to be protected grounding resistance of grounding grid , step and touch voltage. The results showed that deep well anode cathodic protection does not exist on the ground grid voltage back problems , does not affect the thermal stability grounding grid ; also meet the substation on the step and touch voltage safety requirements.

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CLC: > Industrial Technology > Electrotechnical > High Voltage Engineering > Overvoltage and Its Protection > Over-voltage protection devices
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