基于储能振荡的大功率变压器剩磁消除方法

Power transformers are crucial components that contribute to the overall stability and reliability of the power grids. Due to hysteresis effects, residual magnetism can remain in the transformer’s iron core after switching off. This residual magnetism can cause excitation inrush when the transformer is re-energized, potentially damaging the transformer, threatening grid stability, and increasing the risk of power grid failure. To address this issue effectively, a universal, reliable, and fast method for eliminating residual magnetism is needed. This paper proposes an energy storage oscillation method for eliminating remanent magnetization in large power transformers. The method’s effectiveness and speed are validated through simulations and experimental comparisons with various demagnetization techniques. The results confirm that this method is not only rapid but also highly effective in practical applications.