谐波激励条件下铁心损耗测量与计算  

Measurement and calculation of transformer core loss under harmonic excitation

作　　者：赵志刚[1,2] 郭莹[1] 刘佳[1] 尹赛宁 杨凯 Zhao Zhigang;Guo Ying;Liu Jia;Yin Saining;Yang Kai(State Key Laboratory of Reliability and Intelligence of Electrical Equipment,Hebei University of Technology,Tianfin 300132,China;Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province,Hebei University of Technology,Tianjin 300132,China)

机构地区：[1]河北工业大学省部共建电工装备可靠性与智能化国家重点实验室,天津300132 [2]河北工业大学河北省电磁场与电器可靠性重点实验室,天津300132

出　　处：《仪器仪表学报》2018年第8期162-168,共7页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(51107026,51677052,51237005)项目资助

摘　　要：准确地铁心损耗测量是进行铁心损耗计算与分析的基础。通过搭建非正弦激励条件下铁心磁性能测试平台,采用磁通密度可控的实验方案,从谐波相位、谐波含量以及谐波阶次3个方面考察了铁心损耗性能的作用规律,发现谐波阶次和含量与铁心损耗呈正比关系,且谐波相位差的增加使局部磁滞回环扩大,导致铁心损耗的增大,而在谐波阶次足够高时,相位对铁心损耗影响减弱,可忽略相位对其影响。此外,经典Steinmetz公式仅适合正弦激励条件,为将该模型扩展到可计算非正弦激励,提出了等效频率法。通过对比分析损耗误差在8%以内,验证了模型的正确性,对变压器的损耗预测,优化设计以及性能提高都具有重要指导意义。Accurate measurement of core loss is the basis for its calculation and analysis. In this paper,the magnetic performance is tested by the platform of transformer core under complex excitations. The experimental approach in which magnetic flux density can be controlled is used to investigate the core loss factors in three terms,i. e.,harmonic phase,harmonic content and harmonic order. It is found that the harmonic order and content are proportional to the core loss. With the increase of harmonic phase difference,the minor hysteresis loop is enlarged,which results in the increase of core loss. The influence of harmonic phase on the core loss can be ignored when the harmonic order is high enough. In addition,the classical Steinmetz empirical formula is only suitable for the sinusoidal excitation. To extend the model and realize the core calculation under harmonic excitation,the equivalent frequency method is proposed in this paper. Through comparison and analysis,it can be concluded that the loss error is within 8% and the correctness of the model is verified. It is of great significance to the loss prediction,the optimization design and the performance improvement.

关 键 词：变压器铁心 谐波激励 磁性能 损耗计算 

分 类 号：TM206[一般工业技术—材料科学与工程]