摘要
交流接触器广泛应用于低压配电系统。晃电会导致交流接触器触头释放,从而影响工业企业的安全生产。针对这一问题,目前主要采用晃电后接触器再启动和晃电保持两种方案。但这两种方案未考虑实际实现过程中交流接触器触头振动和冲击问题。因此,为解决抗晃电过程中接触器触头冲击问题,本文提出交流接触器柔性切换的概念,并基于柔性切换相位区间提出一种交流接触器晃电保持方案。该方案能够自适应地输出直流电压来保证不同容量的交流接触器在晃电过程中稳定吸合,同时能够避免晃电保持切换过程中接触器触头振动和冲击问题。通过实际装置实验,验证了该柔性切换方案的有效性。
AC contactors are widely used in low voltage distribution systems.The voltage dip leads to the release of AC contactor,thus affecting the safety production of industrial enterprises.To solve this problem,there are two schemes mainly adopted:contactor restart after voltage dip and voltage dip retainment.However,these schemes do not consider the vibration and impact of AC contactor contacts in the actual implementation process.In order to solve the problem of contactor contact impact during voltage dip,this paper proposes the concept of AC contactor flexible switching and a voltage dip retainment for AC contactor closed during voltage dip based on flexible switching.This scheme can adaptively output DC voltage to ensure that AC contactors with different capacities can be stably closed during voltage dip,and can avoid the vibration and impact of contactor contacts during voltage dip and switching.The effectiveness of this scheme is verified by the actual device test.
作者
于洪乾
申笑菱
曾伟
夏洪超
陈沙
YU Hongqian;SHEN Xiaoling;ZENG Wei;XIA Hongchao;CHEN Sha(Wanhua Chemical(Fujian)Co.,Ltd,Fuqing,Fujian 350300;CET Electric Technology Inc.,Shenzhen,Guangdong 518000)
出处
《电气技术》
2023年第3期16-22,共7页
Electrical Engineering
关键词
交流接触器
晃电保持
柔性切换
触头冲击
自适应直流电压
AC contactor
voltage sag retainment
flexible switching
contact impact
adaptive DC voltage