An ion-flow field is very important for the design of an HVDC transmission line. Due to the space ions resulting from corona discharge, there are few practical methods to measure the space electric fields around HVDC transmission lines. In this paper, a compensation method is presented to measure the space potential in the ion-flow field. The space potential can be obtained by applying an adjustable voltage source to a suspended conductor, increasing the voltage step-by-step and measuring the current flowing through the voltage source or the ground-level ion current density under the suspended conductor. When the current is equal to zero or the ground-level ion current density is equal to that without the suspended conductor, the output voltage of the voltage source is the space potential to be measured. The paper first introduces the principle of the measurement method. Then, the feasibility of the method is testified on unipolar and bipolar reduced-scale models. Finally, the measured results are discussed and are compared with the results by the numerical method.

中文翻译：

---

基于悬线电位补偿的架空高压直流输电线路周围空间电位分布测量

离子流场对于高压直流输电线路的设计非常重要。由于电晕放电产生的空间离子，测量高压直流输电线路周围空间电场的实用方法很少。在本文中，提出了一种补偿方法来测量离子流场中的空间电位。空间电位可以通过向悬浮导体施加可调电压源，逐步增加电压并测量流过电压源的电流或悬浮导体下方的地级离子电流密度来获得。当电流为零或地级离子电流密度等于无悬浮导体时，电压源的输出电压为待测空间电位。论文首先介绍了测量方法的原理。然后，在单极和双极缩尺模型上验证了该方法的可行性。最后，对测量结果进行了讨论，并与数值方法的结果进行了比较。