摘要
电力变压器运行的可靠性在很大程度上取决于其绝缘系统,绝缘性能降低,寿命便缩短。从经济性和安全性考虑,希望尽可能延长变压器的使用年限,又确保其安全稳定运行,则要对其进行绝缘诊断和寿命评估。通过分析电力变压器绝缘状态的诊断原理与方法,介绍了一种基于频域介电谱(FDS)技术进行绝缘诊断的新型试验方法。采用FDS法对兰州东变电站750 kV变压器进行了初步的现场测量,并分析了测量结果,结果表明,该变压器纸板水分含量合格,绝缘状况良好,且测量结果与预防性试验吻合良好。FDS有望成为一种新的预防性试验方法,具有良好的应用前景。
The reliability of oil-immersed power transformers depends on the insulation system to a large extent, and the lifetime decrease with the deterioration of the insulation system. Therefore, insulation diagnosis and lifetime evaluation for oil-immersed transformers are necessary. In this paper, diagnostics of transformer insulation are analyzed, and a new diagnostic technique based on frequency domain spectroscopy （FDS）is presented. The 750 kV transformer operated in Lanzhou East Substation is measured on-site with the FDS method. The experimental results show that the moisture content in transformer pressboard is eligible, and its insulation condition is well. And the experimental results are consistent with those of the conventional preventive test. The validity of FDS method is proved, and it is promising as a novel preventive test method.
出处
《高压电器》
CAS
CSCD
北大核心
2010年第4期16-20,共5页
High Voltage Apparatus
基金
国家高技术研究发展(863)计划(2007AA04Z411)
关键词
油浸式变压器
介电响应
频域介电谱
绝缘
老化
oil-immersed transformer
dielectric response
frequency domain spectroscopy
insulation
aging
