关键词: 整流柜设计;热管散热器;温升测试;励磁系统;乌东德水电站;

Abstract: At present, the high power rectifier cabinets for excitation system of generator sets in hydropower stations generally adopt the heat dissipation mode of forced air cooling, which needs to replace the filter screen and clean the air duct regularly.At the same time, the fan operation also produces high noise pollution.In the design of excitation system of the Wudongde Hydropower Station, the self-cooling operation of high power rectifier cabinet was realized by combining heat pipe technology and intelligent current sharing function.Heat pipe principle, calculation method of rated output capacity of heat pipe rectifier cabinet and high current temperature rise test of heat pipe rectifier cabinet in Swiss ABB company laboratory were introduced in this paper.The practice shows the heat pipe rectifier cabinet is in a thermal stable state after long-term operation in the field, which indicates that this application in the excitation system of the maximum hydrogenerator sets is successful, and provides reference for the upgrading and transformation of excitation system of large capacity generator sets in the future.

Key words: rectifier cabinet design; heat pipe radiator; temperature rise test; excitation system; Wudongde Hydropower Station;