高压直流输电工程接地极监测技术分析

The Analysis of Electrode Line Supervision Technology in HVDC Project

高压直流输电工程中接地极状态关系到整个系统的正常运行,它不仅用于传导电流,还在金属回线-大地回线转换起着重要作用。本文介绍了高压直流输电工程中接地极监视常用的两种技术方法:阻抗法和时域反射差值法,以溪洛渡-浙西工程和糯扎渡工程为例,分别阐述了两种技术的原理、在实际工程中的应用以及各自的优缺点。

The normal operation of high-voltage DC transmission project is related to of the State of Electrode line（EL）, EL is not only used in the conduction current, also in the metal loop-Ground loop transformation plays an important role.this paper intrduced two technolygy generally used in impedance monitoring of HVDC transmission project：impendence method and time domain difference method（DTDR）. Take xiluodu-zhejiang project and Nuozhadu project as an example, this paper respectively expounds the principle of two kinds of technology, in the practical engineering application, and the advantages and disadvantages of each.