电工技术学报2017，Vol.32Issue(10)：154-161,8.
基于动态电感-励磁电流曲线的特高压变压器空载直流偏磁计算
DC-Bias Calculation for UHV Transformer in No-Load Based on the Curve of the Relationship between Dynamic Inductance and Exciting Current
摘要
Abstract
To improve the computational efficiency, a fast calculation method for DC bias of UHV transformer in no-load is proposed based on the dynamic inductance and exciting current curve (L-i curve). The efficiency and stability about the calculated current can be enhanced by increasing the series resistance. The error of the calculated current arising from the series resistance can be eliminated effectively by voltage compensation method. To discuss the differences between conventional field-circuit coupling algorithm and L-I curve method, magnetic field model is established according to the product level of UHV transformer parameters, and the L-I curve is drawn. Compared with the conventional field-circuit coupling algorithm, the proposed method can obtain the dynamic inductance value by cubic spline interpolation according to the calculated current, which do not need to return to the field model to get inductance. It can calculate the multiple cycles within a very short period of time. The method can improve the efficiency and accuracy of the DC bias calculation.关键词
特高压变压器/直流偏磁/L-i曲线/三次样条插值/电压补偿Key words
UHV transformer/DC-bias/L-i curve/cubic spline interpolation/voltage compensation分类
信息技术与安全科学引用本文复制引用
王泽忠,谭瑞娟,李书连,王欢,杜建平..基于动态电感-励磁电流曲线的特高压变压器空载直流偏磁计算[J].电工技术学报,2017,32(10):154-161,8.基金项目
国家重点研发计划项目(2016YFC0800103)和国家自然科学基金项目资助(51577060). （2016YFC0800103）
