Design of Energy Supply Device for Online Monitoring Equipment of Power Transformer

During the routine inspection of devices in the existing power system, a series of parameters such as temperature, pressure, flow, and magnetic field must be obtained in time to ensure the security and stability of the system. Therefore, the stable operation of monitored devices in the system must be ensured. However, one of the key problems of the monitoring equipment in the system is the power supply problem, so this paper proposes a design method of the power supply device for the online monitoring equipment of the power transformer. The device is based on the law of electromagnetic induction, by cutting the magnetic induction line, the coil generates induced electromotive force; At the same time, the three-dimensional model of structural mechanics and two-dimensional axisymmetric model of magnetic field of the device were established by using simulation software. Finally, the effective value of the output voltage of the device is 3.9V and the output power is 14.45mW. The device has the advantages of simple structure, small size, simplicity and universality, which is conducive to the development of intelligent integrated monitoring system of transformer operation status, and improves the operation level of transformer to a certain extent.