Design of Flexible Rogowski Coil for Small Current Measurement
Ensuring the safe operation of the power system is crucial for the country and the people.Therefore,it is necessary to monitor the performance and reliability of the equipment in a timely manner.Among them,the measurement of equipment current is quite necessary.Based on the excellent linearity and high accuracy of the Roche coil,the Roche coil is chosen as the current sen-sor.However,in the past,coils had low sensitivity and accuracy when measuring small currents,making them suitable for measur-ing large currents.To address the above issues,a flexible coil design for small current measurement is proposed.Compared to rigid coils,it is lightweight and easy to install.The coil uses a silicone rubber cable as the skeleton,and the double-layer winding in-creases the mutual inductance of the coil,effectively improving the sensitivity of the coil.By measuring the power frequency cur-rent,the final sensitivity is about 40mV/A,which meets the requirements for small current measurement in power systems and can be applied in practical engineering.
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