Influence of High Voltage DC Transmission on Measuring Accuracy of Current Transformers | Zendy

Shihai Yang | Zendy; Gan Zhou | Zendy; Zhig Wei | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Influence of High Voltage DC Transmission on Measuring Accuracy of Current Transformers

Author(s) -

Shihai Yang,

Gan Zhou,

Zhig Wei

Publication year - 2018

Publication title -

ieee access

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.587

H-Index - 127

ISSN - 2169-3536

DOI - 10.1109/access.2018.2874624

Subject(s) - aerospace , bioengineering , communication, networking and broadcast technologies , components, circuits, devices and systems , computing and processing , engineered materials, dielectrics and plasmas , engineering profession , fields, waves and electromagnetics , general topics for engineers , geoscience , nuclear engineering , photonics and electrooptics , power, energy and industry applications , robotics and control systems , signal processing and analysis , transportation

When the high-voltage direct current (HVDC) transmission is running under the monopole-ground-circuit operation mode, slight dc will be coupled into the nearby alternating current (ac) power grids and so has some negative influences, called dc bias phenomenon, on current transformers (CT). In this paper, based on the Preisach magnetization theory, a digital simulation method of CT is established, and then, its correctness has been verified by error calibration experiments. After that, the inherent mechanism of dc bias phenomenon is analyzed and concluded by simulating the coupling relationships among the magnetic flux density of iron core, exciting current, and coupling dc. Most importantly, we have built a coupling dc monitoring network for Jingpin to the south of Jiangsu (J2SJ) HVDC Project in China’s Jiangsu Province, and based on the monitoring data and analysis results of CT’s error varying with coupling dc, the actual influence of J2SJ HVDC on CT measuring accuracy is evaluated quantitatively.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research