大容量电机启动对电网电压暂降的影响分析

Analysis of Influence of Large-Capacity Motor Starting on Voltage Sags of Power Grid

针对某企业大电机接入电网引起的电压暂降问题,通过系统的理论分析和仿真研究,精准得出该用户接入电网电压暂降的影响程度,并提出了扩建一台主变压器、加装动态无功发生器等措施,确保该企业安全可靠地接入电网,为同类型企业接入电网电能质量评估、接入系统方案设计提供借鉴。

In this paper,the voltage sag problem caused by the large capacity motor connected to the power grid in an enterprise is analyzed.Through the theoretical analysis and simulation research,the accurate influence degree of voltage sag is obtained.A series of measures such as expansion of a transformer and installation of the dynamic reactive power generator are put forward to ensure the large capacity motor connecting to the power system safely and reliably,which can be used for reference of power quality evaluation and scheme design of the same type enterprise connecting to the power system.