Abstract
The total electric field and ion current density on the ground beneath the high voltage direct current (HVDC) transmission lines are important parameters of the electromagnetic environment characteristics of transmission lines. Rotating DC electric field mill is a common kind of device to measure the total electric field on the ground. Space charges generated by corona discharge of the lines, move and distribute throughout the whole field, which may have effects on the probe when utilizing the field mill. In order to investigate the effects of space charges on the measurement accuracy of the field mill, analytical relation between total electric field and ion flow density in 1-D Cartesian coordinates was derived, and a corona discharge apparatus with parallel plates was designed and fabricated. The controlled ion flow was generated by the corona discharge device. Experimental results show that space charges increase the total electric field, and measurements by the field mill agree with the calculations. It is accurate and reliable to measure total electric field by the field mill. Relative errors of total electric field between measurements and calculations are obtained, which provide valuable reference in the accurate measurement of the electromagnetic environment of HVDC transmission lines.
| Original language | English |
|---|---|
| Pages (from-to) | 3443-3449 |
| Number of pages | 7 |
| Journal | Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering |
| Volume | 35 |
| Issue number | 13 |
| DOIs | |
| State | Published - 5 Jul 2015 |
| Externally published | Yes |
Keywords
- Corona
- Field mill
- HVDC transmission lines
- Measurement accuracy
- Space charges
- Total electric field
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