568 / 2022-03-30 10:47:05

Research on Transient Pressure Distribution Calculation of High-Voltage Transformer Bushing

transient pressure,finite element method,electrical failure

High-voltage transformer bushings connect the transformer and grid, which withstand extremely high voltage and current. Violent discharge can lead to the sharp rise of pressure inside the transformer bushings which results in the whole transformer exposes to the risk of explosion. Therefore, revealing the transient pressure distribution and transient pressure development trend of HV transformer bushing is essential for the identification of electrical faults and maintenance. A 3D simulation model of internal transient pressure variation of HV transformer bushings during discharge is established. Finite Element Analysis is introduced to simulate the transient pressure distribution and transient pressure development trend inside the transformer bushings. According to the simulation results (figure in Appendix), the pressure distribution follows gravity acceleration, leading the lower pressure to be greater than the upper pressure before discharge occurs. Paper reveals the transient pressure distribution and transient pressure development trend when discharge appears in the HV transformer bushings. It reflects the change law of the internal pressure of HV transformer bushings when discharge occurs. And strong research foundation for on-line monitoring and discharge fault identification of HV transformer bushings.