SBH15型非晶合金变压器短路电动力分析及优化措施

Optimization of Short-circuit Electromotive Force of SBH15 Amorphous Alloy Transformer

为提高非晶合金变压器矩形绕组抗短路能力,基于三维场-路耦合的多物理场对绕组短路电动力的分布特性进行研究。以一台SBH15型非晶合金变压器为研究对象,采用COMSOL仿真建模对其短路状态下电流、漏磁以及电动力分布进行分析研究,揭示短路电动力沿绕组的分布规律,并确定承力薄弱点。研究表明,矩形绕组长轴所受短路电动力大于短轴,且在长轴转角处尤其明显。最后,对其承力不足之处提出优化措施建议。研究成果对进一步提高非晶合金变压器抗短路能力具有工程实用价值。

To enhance the resistance to short circuit of rectangular winding of amorphous alloy transformers, the distribution characteristics of winding short-circuit electromotive force based on field-circuit coupling multiphysical fields were studied. Taking an SBH15 amorphous alloy distribution transformer as the case, the current, magnetic flux leakage, and electric force distribution in short-circuit state were analyzed in the COMSOL simulation software, and the distribution of short-circuit electromotive force along winding and the weak point of short-circuit bearing capacity of rectangular winding were revealed. Studies show the short-circuit electromotive force on the long axis of the rectangular winding is greater than the short axis, and it is particularly obvious at the corner of the long axis. Finally, optimization measures are recommended for the weak bearing capacity. This study provides a certain engineering practical value for further improving the short-circuit resistance of amorphous alloy transformers.