No-load Current Real-time Calculation of DC-biased UHV Transformer

WANG Zezhong; DENG Tao; TAN Ruijuan; YANG Xiaoxiao; LIU Lianguang

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No-load Current Real-time Calculation of DC-biased UHV Transformer

更新时间：2025-12-08

- No-load Current Real-time Calculation of DC-biased UHV Transformer
- Vol. 44, Issue 1, Pages: 218-225(2018)
- 作者机构：
  
  华北电力大学电气与电子工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：31 January 2018，
  
  Published：2018
- 稿件说明：
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WANG Zezhong, DENG Tao, TAN Ruijuan, et al. No-load Current Real-time Calculation of DC-biased UHV Transformer[J]. 2018, 44(1): 218-225.
DOI：

WANG Zezhong, DENG Tao, TAN Ruijuan, et al. No-load Current Real-time Calculation of DC-biased UHV Transformer[J]. 2018, 44(1): 218-225. DOI：

摘要

通过获取特高压（UHV）变压器的电感-电流曲线和偏磁情况下空载电流峰值-直流偏磁电流曲线

提出了一种特高压变压器直流偏磁空载电流实时计算方法

与直接用场-路耦合法的计算结果对比

验证了该实时计算模型的准确性;通过选取最优迭代算法和变步长策略

提升该模型计算的效率和实时性;由任意偏置量的直流数据

实现在ms级的时间内得到该直流偏置对应的电流波形。结果表明该特高压变压器直流偏磁空载电流实时计算模型计算速度快

计算准确性高

在变压器直流偏磁电气参数扰动在线评估、防止保护拒动或误动和保障其他电气设备安全运行等方面具有广泛的应用前景。

Abstract

By getting inductance-current curve and DC-biased exciting current peak-DC curve of ultra high voltage（UHV） transformer

we put forward a kind of real-time model for DC-biased exciting current calculation

in which

the DC resistance of UHV transformer is ignored.Compared with the time-domain magnetic-circuit coupled method

the real-time calculation is proved to be exact.Through selecting the optimal iterative algorithm and applying a variable step strategy

the efficiency and real-time performance of real-time calculation model can be enhanced.Given any DC data of the value

we can get the corresponding waveform of exciting current with the DC bias in the millisecond time.Results show that real-time model for DC-biased exciting current calculation has great advantages in terms of performance on computing speed and accuracy.The real-time model has widespread application prospect in online assessment on electric parameter perturbation due to the DC-biased problem of UHV transformer

preventing refusing action or incorrect tripping of power system relay protection and other electrical equipment safety operation and so on.

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