【摘要】 观音岩电站送出直流工程是南方电网异步联网工程的重要组成部分。相对于其他直流工程,该直流的特点主要有:1送受端换流站可能存在的运行方式较多;2受端换流站送出线路加装串补,且最终串补度尚未确定。针对观音岩电站送出直流工程的特点,采用NIMSCAN程序对该直流工程送受端换流站的系统谐波阻抗特性进行了研究。对于送端换流站,比较了联网运行方式和孤岛运行方式下的系统等值谐波阻抗特性;对于受端换流站,按照送电方向的不同对系统的谐波阻抗进行分别计算。最后,分析了换流站出线串补的串补度变化对系统谐波阻抗参数的影响。更多还原

【Abstract】 Guanyinyan HVDC project is an important part of asynchronous interconnection project in Southern Power Grid.Compared to other HVDC projects,this project has more operation modes and the lines of inverter station connected to the system contain the series compensation whose value is still in studying. Based on the characteristics of this project,the equivalent harmonic impedances of rectifier station and inverter station are studied with NIMSCAN program. For the rectifier station,the characteristics of equivalent harmonic impedance of power system under grid- connected operation mode and island operation mode are compared. For the inverter station,the harmonic impedance of system is separately calculated according to the different transmission directions. In the end,the influence of the series compensation degree on harmonic impedance parameters is analyzed.更多还原