大唐岩滩水力发电有限责任公司500kV超高压变压器冷却系统改造

大唐岩滩水力发电有限责任公司（以下简称岩滩发电公司）主变压器安装在厂房与大坝之间，主变压器采用的冷却方式为强迫油循环风冷方式，受运行环境影响冷却效果差。文章阐述了通过对3#主变压器冷却器进行改造，将冷却方式更换为强迫油循环水冷方式，大大提高了3#主变压器的冷却效果，为岩滩发电公司其他主变压器冷却器改造提供决策依据和经验。

Upgrading the Cooling System of Ultra-high Voltage Transfers （500 kV） of Datang Yantan Hydropower Co.,Ltd.

Datang Yantan Hydropower Co., Ltd.（hereafter referred to as Yantan Hydropower company）applies a cooling method of forced-oil wind-cooled circulation on its main transfers, which are installed between workshops and dams. How-ever the cooler＇s performance is easily affected by its operation environment. The article expounds how to improve cooler＇s performance by upgrading the cooler of 3# main transfers and using forced-oil water-cooled circulation transformer, which provides decision-making basis and experience for upgrading other main transfers of Yantan Hydropower Company.