无级调感技术在特高压变压器局放试验中的应用研究

局放试验作为变压器现场交接试验的一种,是考核变压器最严厉的方法之一,可以有效检测其内部是否存在缺陷故障。特高压变压器的现场局部放电试验中,在计算分析被试变压器的容性无功及感性补偿的基础上,首次提出了基于大容量可调电抗器的无级调感技术以及感性无功实时监测方法,可调电抗器可以平滑的调节电抗值从而改变感性补偿,感性补偿实时监测方法可实时反映试验中的补偿状态,保障试验高效安全进行。

Partial Discharge Experiment of UHV Transformer Based on Stepless Adjustment Technology

AAs the most severe assessment method in transformer field handover tests, partial discharge test can effectively detect insulation faults inside transformer. In UHV transformer field partial discharge test, based on calculation and analysis of capacitive and inductive power, large capacity stepless adjustable reactor sense technology and inductive reactive power real-time monitoring method are presented for the first time. Adjustable reactor can smoothly adjust the reactance value to change inductive compensation state compensation, and reactive power real-time monitoring method can reflect the real-time test and ensure the efficiency and safety of the test.