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Study and Experiment on Non-Contact Voltage Sensor Suitable for Three-Phase Transmission Line
Qiang Zhou1, Wei He2, Dongping Xiao3
1State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China. 20131101031@cqu.edu.cn.
Sensors (Basel, Switzerland)
|January 6, 2016
Summary
This study introduces a novel non-contact voltage sensor based on electrostatic induction. The new sensor offers simple insulation design, reduced phase difference, and improved accuracy for real-time voltage measurement in power systems.
Area of Science:
- Electrical Engineering
- Power Systems
Background:
- Traditional voltage transformers (potential transformers and capacitance voltage transformers) face challenges with large size, heavy weight, complex insulation design, and reduced accuracy.
- Existing transformers exhibit significant phase differences between the detected and measured signals, hindering accurate and timely voltage monitoring.
Purpose of the Study:
- To design and develop a non-contact voltage sensor addressing limitations of conventional transformers.
- To improve detection accuracy, reduce phase difference, and enable real-time voltage measurement.
Main Methods:
- Utilized the principle of electrostatic induction for non-contact voltage detection.
- Employed electrostatic coupling to capture the electric field generated by conductor charges.
- Optimized electrode design to minimize phase difference and enhance voltage division ratio.
Main Results:
- The developed non-contact voltage sensor features a simple insulation structure and small volume.
- Optimization significantly reduced the phase difference in measurements.
- Achieved increased voltage division ratio and measurement accuracy.
Conclusions:
- The non-contact voltage sensor provides accurate and real-time conductor voltage measurement.
- The sensor is suitable for online monitoring of three-phase transmission and distribution lines.
- This technology aligns with the developmental trajectory of smart grids.
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