摘要
分析了特高压直流换流站的无线电干扰源及其传播方式,以拟建中的±800 kV向家坝—上海直流输电工程为例,进行换流站无线电干扰的预测方法研究和计算:分析了干扰电压源、建立了高频模型,优化了无线电干扰(radio interference,RI)滤波器的设计。结果表明:换流站总无线电干扰以及交流、直流线路和接地极线路的无线电干扰频谱均随频率升高而下降;合理装设RI滤波器后,规定测量位置的无线电干扰水平基本上都小于40dB;±500 kV换流站的无线电干扰限值可以作为±800 kV换流站的无线电干扰控制限值。文章还给出了减少换流站无线电干扰的相关建议。
The source of radio interference and its radiation in UHVDC converter station was investigated. Taking planned ±800 kV Xiangjiaba-Shanghai DC transmission project for example, research on forecasting method for radio interference in converter station and corresponding calculation were conducted, including interference voltage source analyzing, high frequency model establishing, and radio interference filter optimizing. Calculation results show that the total radio interference in converter station and the radio interference levels in AC and DC transmission lines as well as that in grounding lines are reduced with the increase of frequency; basically, all the radio interference levels at specified measuring positions are less than 40dB; thus the limit values of radio interference for ± 500kV converter stations can be used as that of radio interference for ±800kV converter stations. Relevant suggestions on reducing radio interference caused by converter station are given.
出处
《电网技术》
EI
CSCD
北大核心
2008年第2期1-5,共5页
Power System Technology
关键词
无线电干扰
特高压
直流换流站
radio interference
ultra high voltage （UHV）：DC converter station
