一二次融合的智能集成开关应用的研究与分析  

Research and Analysis on the Application of Intelligent Integrated Switches of Primary and Secondary Fusion

作　　者：张冶 蔡颖凯 回茜 曹世龙 许晶晶 ZHANG Ye;CAI Yingkai;HUI Qian;CAO Shilong;XU Jingjing(State Grid Liaoning Electric Power Supply Co.,Ltd.,Shenyang 110000)

机构地区：[1]国网辽宁省电力有限公司,沈阳110000

出　　处：《电气工程学报》2022年第1期199-205,共7页Journal of Electrical Engineering

摘　　要：针对一二次融合的智能集成开关易受雷击电磁波干扰、绝缘性差等问题,对其应用特性进行分析。通过设备集成和功能集成以及一次或两次感知功能匹配后,设计出一二次融合方案,该方案使电流传输过程更加智能。通过添加绝缘片,计算出工频电动势,分析出线路中容性电流在感抗上受到压降影响程度,使用电阻分压式电压传感器增强开关绝缘性和抗击穿性。计算比值差和相位差,结合FTU变压器的次级电压信号确定雷击干扰位置,实现开关抗电磁波干扰。试验表明,工频耐压电路中未出现击穿、闪络等破坏性放电现象,平均击穿电场强度达到最大为5.8V/m,与实际值测试结果一致,说明开关绝缘强度较强,为配电网合理控制电流电压输出提供技术支持。Aiming at the problems that the primary and secondary fusion intelligent integrated switch are easily interfered by lightning electromagnetic waves and has poor insulation, the application characteristics are analyzed. After device integration and function integration and primary and secondary sensing function matching, a primary and secondary fusion scheme is designed, which made the current transmission process more intelligent. By adding insulating sheets, the power frequency electromotive force is calculated,the capacitive current in the line is affected by the voltage drop on the inductive reactance, and the resistance divider voltage sensor is used to enhance the insulation and breakdown resistance of the switch. the ratio difference and phase difference was calculated, and the secondary voltage signal of the FTU transformer is combined to determine the location of lightning interference, so as to realize the switch’s anti-electromagnetic wave interference. The test showed that there is no damaging discharge phenomenon such as breakdown and flashover in the power frequency withstand voltage circuit, and the average breakdown electric field strength reached a maximum of 5.8 V/m, which is consistent with the actual value test result, it indicated that the switch had a strong insulation strength. The distribution network provided technical support for reasonable control of current and voltage output.

关 键 词：一二次融合 智能集成开关 配电网 绝缘 雷击 

分 类 号：TM930[电气工程—电力电子与电力传动]