直流融冰装置零功率试验原理及实际工程试验研究  

Research on Principle and Practical Operation of DC Ice-melting Device Zero Power Test

作　　者：谢惠藩[1] 卢志良[1] 张楠[1] 彭光强[1] 陈晓鹏[1] 

机构地区：[1]中国南方电网超高压输电公司检修试验中心,广州510663

出　　处：《高电压技术》2014年第2期413-420,共8页High Voltage Engineering

摘　　要：目前有关直流融冰装置零功率试验(ZPT)电气特性的相关研究成果较少。为此,采用EMTDC软件对直流融冰装置零功率试验进行深入研究,包括:零功率试验原理、直流电流电压及其谐波特性、交流谐波特性、有功与无功分析、阀电流与阀电压分析、通态电流上升率和断态电压上升率分析等。结果表明:直流融冰装置触发角越小,短路直流电流越大,换流器内部的电压降越大,直流端口电压越低;直流电流特征谐波为12k1(k1=1,2,3,…)次谐波,直流电压谐波为6k2(k2=1,3,5,…)次谐波,且其直流分量很小,且随着触发角的增大,直流分量减小,交流分量增大;融冰装置的有功损耗很小、无功损耗很大,且随着电流的增大,无功损耗成比例增大。For further understanding the electrical characteristics of DC ice-melting device＇s zero power test （ZPT）, we intensively researched the ZPT using EMTDC, including the mechanism of ZPT, the DC current/voltage and their har- monic characteristics, the AC harmonic characteristics, and the analysis of active power, reactive power, valve current/voltage, rising rates of on-state current and off-state voltage, and so on. The results show that, when the triggering angle decreases, the short-circuit DC current and the voltage drop in inverter increase, but the voltage at DC port decreas- es. The characteristic harmonics of DC current and DC voltage are 12kl （k1=1,2,3,...） and 6k2（k2=l,3,5,..-） harmonics, respectively. The DC components are small, and they decrease when the triggering angle increases, while the AC compo- nents increases. Moreover, DC ice-melting devise consumes small active power but big reactive power consumption, and the reactive power consumption proportionally increases with current. The obtained calculative results agree with field tests.

关 键 词：直流融冰装置 零功率试验 EMTDC软件 直流电流 直流电压 谐波分析 

分 类 号：TM752.5[电气工程—电力系统及自动化]