独立接地极改造为共用接地极方案研究

Research on the Plan of Independent Earth Electrode Reconstructed to Common Earth Electrode

摘要: 为解决直流输电工程接地极选址困难的问题及减少对环境的影响，建议具备条件下优先考虑将已建独立接地极改造为共用接地极。对已建独立接地极要对其跨步电压、腐蚀寿命、最大温升、导体载流量等性能指标进行校核，并根据校核结果确定相应的改造项目，同时要重新评估接地极对交流电网、油气管道以及铁路设施的影响。

Abstract: Inorder to solve the difficulties of earth electrode site selection and environment problems in DC transmission engineering, the proposed solution is to reconstruct independent earth electrode to common earth electrode. The main performance such as step voltage, corrosion life, maximum temperature rise, conductor capacity must be verified during the transformation period, and according to the verification results to determine the corresponding transformation project. At the same time, the effect of earth electrode on AC power network, oil and gas pipeline, railway facilities should be reviewed.