- 作者: 黃慶連; 林清一; 魏忠必; 鄭健隆; 黃啟貞
- 作者服務機構: 國立成功大學電機工程學系; 國立成功大學航空太空學系
- 中文摘要: 變壓器飽和磁滯現象對電力系統暫態影響很大。傳統上,對變壓器飽和特性之研究,通常須經過複雜的實驗手續才能獲得所須數據以建立數學模型。本文透過理論分析,發現瞬間值飽和特性和有效值電壓、電流之間有密切關係,此外鐵心等效電阻對磁滯迴路面積有直接影響。因此,本文採用簡化解析模型以分析飽和情況下的磁滯現象,可免除複雜實驗手續。最後,以不同容量變壓器進行模擬,發現與實驗值相當吻合。因此,本文所提出的解析模型,能準確決定飽和情況下變壓器磁滯現象。
- 英文摘要: The transformer saturation and hysteresis characteristics are imvortant to power systems undertransient operations.Coventional methods to determine these characteristicsihave required, field test data andseveral supporting analyses. Due to complicated correlated factors, field tests for such purposes are difficult.Based on a theoretical approach, the transformer saturation and hysteresis characteristics have certainrelations with the r.m.s. voltage/current relation curve and the current flow through the equivalent coreresistor. This paper presents simplified analytical expression in polynomial form to determine the trans-former saturation and hysteresis characteristics without field test data. Higher order approximations aresimulated for comparison with various capacity transformers. The results are compared with experimentsand simulations and show very good agreement. It is possible to determine accurate transformer saturationand hysteresis characteristics with this simplified procedure.
- 中文關鍵字: analytical expression; transformer saturation; hysteresis charactersitics; theoretical approach
- 英文關鍵字: --