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Simulation, Design, and Test of a Dual-Differential D-Dot Overvoltage Sensor Based on the Field-Circuit Coupling
Pengcheng Zhao1, Jingang Wang1, Qian Wang2
1State Key Laboratory of Power Transmission Equipment and System Security, Chongqing University, Chongqing 400044, China.
Sensors (Basel, Switzerland)
|August 7, 2019
Summary
A new Dual-Differential D-dot overvoltage sensor was developed for accurate power grid measurements. This sensor offers excellent performance for non-contact overvoltage detection in power transmission lines.
Area of Science:
- Electrical Engineering
- Power Systems
- Electromagnetics
Background:
- Accurate overvoltage measurement is critical for power grid insulation coordination and characteristic analysis.
- Existing D-dot voltage sensors require optimization for improved performance and accuracy.
Purpose of the Study:
- To design and develop an advanced Dual-Differential D-dot overvoltage sensor.
- To optimize sensor structural parameters for enhanced measurement accuracy.
- To validate the effectiveness of the Field-Circuit Coupling method in sensor design.
Main Methods:
- Designed a Dual-Differential D-dot overvoltage sensor based on prior D-dot sensor research.
- Employed the Field-Circuit Coupling method for sensor parameter design.
- Utilized Ansoft Maxwell and Simplorer for joint finite element and circuit simulation.
- Manufactured the sensor and established a test platform for performance verification.
Main Results:
- The Dual-Differential D-dot sensor demonstrated excellent steady-state and transient performance.
- Achieved minimal phase and amplitude errors in measurements.
- Successfully enabled non-contact measurement of power transmission lines.
- Validated the Field-Circuit Coupling method's efficacy in sensor design.
Conclusions:
- The developed Dual-Differential D-dot sensor meets the requirements for accurate overvoltage measurement in power grids.
- The Field-Circuit Coupling method is a rational and effective approach for designing high-performance D-dot sensors.
- The sensor facilitates non-contact monitoring, crucial for power transmission line safety and maintenance.
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