摘要
高压电缆的线芯中流过交变电流时,电缆的金属屏蔽层两端因电磁感应的原理出现感应电压,电缆屏蔽层上的环流产生热量造成电能损耗,严重地影响高压电缆载流能力和传输容量,电缆绝缘遭击穿故障停电时还影响供电的安全运行可靠性。当连接各电子设备的控制电缆交叉复杂地处在强大的交变电磁场环境时,控制电缆屏蔽层上感应电压严重影响到电子装置设备的安全可靠运行,为有效地抑制电磁干扰,控制电缆采取的接地方式至关重要。故分析高压电缆和控制电缆屏蔽层是单端接地还是多端接地的接地问题,对确保高压电缆和控制电缆安全稳定可靠运行具有重要的意义。
When the core of high-voltage cable flows through alternating current, the metal shield layer of the cable appears inductive voltage at both ends of the shield layer due to the principle of electromagnetic induction. The circulation current on the shield layer of the cable generates heat, which causes power loss, seriously affects the current carrying capacity and transmission capacity of the high-voltage cable. When the cable insulation is broken down, the safe operation reliability of power supply is also affected. When the control cables connecting various electronic equipments are crossed and complex in the strong alternating electromagnetic field environment, the induced voltage on the shield layer of the control cables seriously affects the normal safe and reliable operation of the electronic equipments, so how to effectively suppress the electromagnetic interference of the control cables and adopt the correct grounding mode is also very important. Therefore, it is of great significance to analyze whether the shield layer of high-voltage cable and control cable is single-ended grounding or multi-ended grounding to ensure the safe, stable and reliable operation of high-voltage cable and control cable.
作者
蔡少飞
CAI Shaofei(Extrahigh Voltage Transmission Company Liuzhou Bureau,Liuzhou 545026,China)
出处
《黑龙江电力》
CAS
2019年第4期324-328,共5页
Heilongjiang Electric Power
关键词
高压电缆
屏蔽层
单端接地
多端接地
high-voltage cable
shield layer
single-ended grounding
multi-ended grounding
