换流变压器在直流融冰装置中的作用研究  

Research on Influences of Converter Transformer on DC Ice-Melting Device

作　　者：何鹏飞[1] 王渝红[1] 李兴源[1] 魏巍[1] 李思思[1] 邹家勇 吴怡敏 何琰 

机构地区：[1]四川大学电气信息学院,四川省成都市610065 [2]西南电力设计院,四川省成都市610065

出　　处：《电网技术》2012年第5期113-117,共5页Power System Technology

基　　金：国家自然科学基金项目(51037003);国家电网公司科技项目(19KJ020402C2012720110000)~~

摘　　要：直流融冰是目前最为成熟和可行的融冰手段之一。文章在现有直流融冰技术的基础上,通过对直流融冰的最小融冰电流、直流融冰功率以及谐波电压的研究,分析使用和不使用换流变压器对直流融冰装置和交流线路的影响,为直流融冰的应用提供了一个新的思路。结合四川电网某融冰工程项目,使用PSCAD/EMTDC软件仿真得出使用换流变压器的工程实际应用条件和限制范围,研究成果成功应用在四川电网直流融冰项目设计工作中,可供今后工程参考。DC ice melting is one of the most mature and feasible ice melting methods. Based on existing DC ice-melting technology and by means of researching minimum ice-melting current and ice-melting power of DC ice-melting and the action of harmonic voltages, the influences of using or not making use of converter transformer on both DC ice-melting device and AC transmission line are analyzed to provide a new thinking of applying DC ice-melting. Combining with a certain ice-melting item of Sichuan power grid, the conditions of whether converter transformer could be applied in engineering practiceare obtained by PSCAD/EMTD simulation. Results of PSCAD/EMTD simulation show that when the length of the transmission line to be ice-melted is short and the needed ice-melting current is not too high, the converter transformer could be not utilized to reduce the investment for the ice-melting device and ensure secure and stable operation of power grid; when the length of the transmission line to be ice-melted is long and the larger DC voltage drop is needed, the converter transformer should be utilized to adjust the firing angle and reduce reactive power loss..

关 键 词：换流变压器 直流融冰 谐波 无功功率 

分 类 号：TM41[电气工程—电器]