中国电机工程学报Issue(36)：6585-6591,7.DOI:10.13334/j.0258-8013.pcsee.2014.36.027
特高压换流变压器低频电流短路法现场加热装置研制及应用
Development and Application of Low Frequency Short-circuit Current On-site Heating Device for the UHV Converter Transformer
官澜 1李博 1刘锐 1李光范 1李金忠 1张书琦1
作者信息
- 1. 中国电力科学研究院，北京市海淀区 100192
- 折叠
摘要
Abstract
The short-circuit method produces heat from inside of transformer insulation, which have better drying efficiency than traditional hot oil circulation method using vacuum oil filter, and is suitable for heating large-scale power transformers, such as UHV converter transformers at site. However, power frequency short-circuit heating device has many disadvantages such as high voltage, complex composition, large area and great weight, and it was not applicable for site. In order to overcome those shortcomings, the low frequency short-circuit heating device was developed based on ultra-low frequency sinusoidal pulse width modulation (SPWM) technique. It reduced the voltage and power capacity by decreasing inductance of the transformer windings at low frequency, and therefore it was simpler, smaller and lighter. The device had been applied on the±800 kV UHV converter transformer, and had achieved remarkable effects. All applications indicate that the low frequency short-circuit heating device could heat the large scale transformer fast and evenly, and it is safe, convenient, and suitable for site.关键词
特高压换流变压器/低频/短路法/加热/现场Key words
UHVconverter transformer/low frequency/short-circuit method/heating/on-site分类
信息技术与安全科学引用本文复制引用
官澜,李博,刘锐,李光范,李金忠,张书琦..特高压换流变压器低频电流短路法现场加热装置研制及应用[J].中国电机工程学报,2014,(36):6585-6591,7.
