油浸式电力变压器过载能力评估算法及工程应用研究

油浸式电力变压器的过载能力评估对于确保其安全可靠运行至关重要。目前缺乏一种简单而有效的评估方法，本文通过分析影响油浸式电力变压器过载能力的关键因素，结合变压器的设计原理和片式散热片油箱等效散热面积的概念，首次提出了一种基于油平均温升和顶层油温度的工程评估方法。所提方法考虑了变压器的热特性、冷却系统性能、负载电流、环境温度等因素对变压器温升的影响。该工程评估方法不仅简化了计算过程，还提高了评估结果的准确性。为了验证所提出方法的有效性，利用在运电力变压器实际运行数据进行了工程计算验证。通过与实际测量值进行比较，证实了该方法能够准确地评估油浸式电力变压器的过载能力。

Research on Overload Capacity Evaluation Algorithm and Engineering Application of Oil-Immersed Power Transformer

The assessment of the overload capacity of oil-immersed power transformers is vital for ensuring their safe and reliable operation, as well as maintaining the stability of the entire power system. Despite the absence of a simple and effective method for this assessment, this study introduces an engineering evaluation approach based on average oil temperature rise and top oil temperature. By analyzing key factors that affect the overload capacity of oil-immersed power transformers, and integrating transformer design principles with the concept of equivalent heat dissipation area of plate-type radiator tanks, the proposed method accounts for the thermal characteristics of the transformer, cooling system performance, load current, and ambient temperature''s impact on temperature rise. This simplified calculation process enhances the accuracy of the assessment results. The method''s validity was confirmed through comparison with actual operational data from in-service power transformers, demonstrating its capability to accurately assess overload capacity.