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首页> 外文期刊>IEEE Transactions on Power Delivery >A newly modified forced oil cooling system and its impact on in-service transformer oil characteristics
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A newly modified forced oil cooling system and its impact on in-service transformer oil characteristics

机译：新型强制油冷却系统及其对在役变压器油特性的影响

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摘要

This paper introduces a newly modified forced oil-cooling system, which comprises a bypass filter (BPF). The BPF has been introduced in such a way that its intake oil is the hot oil from the transformer top and to deliver it at the inlet of the oil-circulating pump. This system has been used for two transformers. Periodical measurements of the physical, chemical, and electrical transformer oil characteristics by standard testing methods before BPF operation, in operation and after stopping its operation in the transformer have been carried out. Before BPF operation, the results revealed that these characteristics are continuously deteriorating with the increase in transformer oil service period. However, when BPF is in operation, this deterioration not only has been reduced but also some of the characteristics have been improved. After the operation of BPF has been stopped, some of the characteristics resumed their deterioration. However, the rates by which these characteristics are deteriorating are noticeably smaller than their initial values. The deteriorated transformer oil characteristics (without installation of BPF) have been predicted by polynomial regression, multiple linear regression, and general linear multiple regression models. The efficiency and feasibility of the new cooling system in preserving in-service transformer oil characteristics have been proved and justified by quantitative evaluation of the measured and theoretically predicted deteriorated (without installation of BPF) characteristics.
机译：本文介绍了一种新改良的强制油冷却系统，该系统包括一个旁路过滤器（BPF）。 BPF的引入方式是，其进气油是来自变压器顶部的热油，并将其输送到循环油泵的入口。该系统已用于两个变压器。在BPF运行之前，运行中以及在变压器中停止运行之后，已通过标准测试方法对物理，化学和电气变压器油的特性进行了定期测量。结果表明，在使用BPF之前，这些特性随着变压器油使用时间的增加而不断恶化。但是，在运行BPF时，不仅可以减少这种劣化，而且还可以改善某些特性。 BPF的操作停止后，某些特性恢复了其恶化。但是，这些特性恶化的速率明显小于其初始值。已通过多项式回归，多元线性回归和一般线性多元回归模型预测了劣化的变压器油特性（未安装BPF）。通过对测量的和理论上预测的劣化特性（不安装BPF）进行定量评估，已经证明并证明了新的冷却系统在保持使用中的变压器油特性方面的效率和可行性。

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