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(一) 概述当发电机提高出力后,要求主变压器相应的提高出力。我厂变压器提高出力是保留原有散热器及风机,另加一套强油水冷装置。改强油水冷以后,~#1主变经常超负荷30～50％运行。这时如何控制变压器的负荷,成为一个极待解决的问题。为了初步摸清~#1主变在超负荷运行时线卷导线与变压器油的温差情况,並且进行比较,我们分别对~#1、~#2、~#3主变进行了带电测温。由带电测温结果可看出,变压器超负荷越多,铜油的温差就愈显著。我们根据带电测试结果,拟订了一个控制变压器负荷方案。经过近一年的实践,证明这样控制是较为合理的。
(A) Overview When the generator to increase output, the main transformer to increase the output accordingly. Our factory transformer to increase output is to retain the original radiator and fan, plus a set of strong oil-water cooling device. After the oil-water cooling is strengthened, ~ # 1 main transformer is often overloaded 30 ~ 50%. At this time how to control the load on the transformer has become a problem to be solved. In order to find out the temperature difference between the transformer and transformer oil during the overload operation of ~ # 1 main transformer, we carried out the live temperature measurement on ~ # 1, ~ # 2 and ~ # 3 main transformer respectively. It can be seen from the live temperature measurement results, the more the transformer overload, the more significant temperature difference between copper oil. According to the live test results, we developed a control transformer load program. After nearly a year of practice, to prove that such control is more reasonable.