电压暂降对民用建筑配电系统的影响及对策

摘要

By introducing the concept of voltage sag and analyzing the cause of voltage sag and the impact of voltage sag on power distribution system in civil buildings, the article proposes the following methods for power distribution system in civil buildings to cope with voltage sag: improving the tolerance of power distribution system against voltage sag of power supply; reduced voltage starting shall be adopted for large-capacity motors to reduce voltage sag caused by direct starting; voltage stabilizing measures shall be taken for sensitive equipment to reduce the impact of voltage sag on it; parameter of elements in power distribution system shall be properly rectified to reduce the impact on power distribution system in case voltage sag develops into short power supply interruption.%通过介绍电压暂降的概念，分析电压暂降的原因及其对民用建筑配电系统的影响，提出民用建筑配电系统设计应对电压暂降的方法：提高配电系统对电源电压暂降的耐受能力；大容量电机采用降压启动，减少由于大容量电机直接启动引起的电压暂降；对敏感设备采用稳压措施，减少电压暂降对其的影响；合理整定配电系统元件参数，降低电压暂降发展为短时断电对建筑配电系统的影响。