自适应涌流抑制技术在高压内置结构高阻抗变压器投切中的应用

Application of Self-adaptive Inrush Suppression Technology in Switching High-impedance Transformer with High Voltage Built-in Structure

针对高压内置结构的高阻抗变压器目前尚缺乏有效的励磁涌流抑制技术,导致设备经常报警,严重影响到变压器投运的问题,提出了一种自适应算法的涌流抑制技术。该技术在充分考虑多种外界干扰因素影响的基础上,对合闸时间进行自适应修正补偿,实现变压器合闸时的励磁涌流抑制。在南方电网直流输电工程进行试验的结果,验证了该技术的可行性。

For high-impedance transformer with high voltage built-in structure,there is no effective technology to suppress inrush current,which causes equipment to alarm frequently and seriously affects the operation of transformer.To solve this problem,an adaptive algorithm for inrush suppression is proposed in this paper.On basis of fully considering the influence of various external disturbance factors,the technology carries out self-adaptive correction compensation for closing time to realize the suppression of inrush current when transformer closes.The method is tested the HVDC transmission project in the southern power grid,and the experimental results verify the feasibility of this technology.