CAJ | 학술논문

为了研究特高压直流换流站阀厅的屏蔽效能和设计要求,提出了频率在150 kHz～80 MHz范围内、电场强度≤1 V/m射频干扰强度(120 dB,基准1μV/m对应0 dB)作为邻近换流阀厅外侧的控制指标.结合换流站现场实测数据进行相应的分析及计算,提出阀厅屏蔽设计要求:(1)屏蔽效能目标值取≥20 dB;(2)阀厅屏蔽一般采用直径6 mm、网孔面积200 mm×200 mm的钢筋网;(3)如果墙壁直接采用双层0.6 mm厚镀铝锌压型钢板,每隔30 cm用铆钉连接,两板重合部分宽度>5 cm,则单层板在≤10 MHz范围内的屏蔽效能>40 dB,也可满足要求.
위료연구특고압직류환류참벌청적병폐효능화설계요구,제출료빈솔재150 kHz～80 MHz범위내、전장강도≤1 V/m사빈간우강도(120 dB,기준1μV/m대응0 dB)작위린근환류벌청외측적공제지표.결합환류참현장실측수거진행상응적분석급계산,제출벌청병폐설계요구:(1)병폐효능목표치취≥20 dB;(2)벌청병폐일반채용직경6 mm、망공면적200 mm×200 mm적강근망;(3)여과장벽직접채용쌍층0.6 mm후도려자압형강판,매격30 cm용류정련접,량판중합부분관도>5 cm,칙단층판재≤10 MHz범위내적병폐효능>40 dB,야가만족요구.
The RF inference no more than 1 V/m caused by the electromagnetic field in the frequency scope of 150 kHz to 80 MHz is considered as the limit specification outside the valve hall.According to the analysis and calcula-tion of the measurement in converter stations, the design requirements for the shielding of valve hall are given as fol-lows: (1) The value of the shielding effectiveness of the valve hall should be larger than 20 dB.(2) The steel wire mesh of wire diameter 6 mm and the side length 200 mm should be used for the shielding.(3) If the sheets are con-nected every 30 em with the rivets and the width of the superposition is larger than 5 cm, the shielding effectiveness of single layer sheet achieves 40 dB when the frequency is smaller than 10 MHz.