同塔双回线路感应电流与感应电压的研究

Study of induced current and voltage for double circuit transmission lines on the same tower

对同塔双回线路的感应电流和感应电压进行了理论分析,并利用电磁暂态计算程序EMTP进行了验证计算.对比研究了500 kV常规型和紧凑型杆塔的感应效应,得到了线路长度、输送功率、线路高抗等因素与容性、感性的感应电压、电流之间的关系.研究结论可推广于500 kV以外的其他电压等级线路,这对于同塔双回线路的设备设计选型、运行检修具有参考价值.

The theoretical analysis is made for the induced current and voltage which occurs on double circuit transmission lines on the same tower.Then the analysis results are proved through calculation using EMTP.The inductive effects of 500 kV conventional tower and compact tower are studied contrastively.And the relationships between induced current,induced voltage and some factors,such as line length,transmission power,shunt reactor,and so on are studied.The conclusion can be extended to the lines of other voltage levels.So the research result is valuable for the designing and maintenance of double circuit transmission lines.