An accurate voltage measurement method for electric field inversion in power lines with dual-stage model error reduction
The long transmission distance of renewable energy power and the complex line environment pose challenges for line voltage measurement. The voltage measurement method based on electric field inversion has great advantages in insulation, safety, and ease of use. However, its measurement accuracy is s...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-10-01
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| Series: | International Journal of Electrical Power & Energy Systems |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S014206152500571X |
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| Summary: | The long transmission distance of renewable energy power and the complex line environment pose challenges for line voltage measurement. The voltage measurement method based on electric field inversion has great advantages in insulation, safety, and ease of use. However, its measurement accuracy is susceptible to electric field distortion and time-varying noise. To this end, this paper proposes an accurate voltage measurement method based on electric field inversion. First, in the first stage, an optimization simulated charge model (CSM) is established, which can minimize the electric field inversion error via an optimization model. In the second stage, by introducing a static error correction term into the power line electric field, the influence of ground potential on the inverted voltage can be reduced. The electric field inversion error can be minimized by combining the electric field recovery error and the matrix condition number objective. Finally, by dynamically adjusting the CSM parameters iteratively, the solution error caused by noise can be significantly reduced. The simulation and actual experiments verify the effectiveness of the proposed method. The method reduces the voltage amplitude inversion linearity error by 2.60% and the voltage frequency inversion error by 4.87% under 1% rated amplitude static noise. With 1% rated amplitude dynamic noise, it minimizes the voltage amplitude inversion linearity error by 2.08% and the voltage frequency inversion error by 5.15%. |
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| ISSN: | 0142-0615 |