【作者】 任果； 贾宏杰；

【Author】 REN Guo,JIA Hong-jie (Key Laboratory of Power System Simulation and Control of Ministry of Education,Tianjin University,Tianjin 300072)

【机构】 天津大学电力系统仿真控制教育部重点实验室；

【摘要】 工作母线失电后,厂用电切换装置就成为保障各类大型用电企业(如电厂、化工、钢铁等)正常运行的一种重要手段。而在现代企业中,厂用负荷大部分为感应电动机,因此研究电动机各种参数对厂用电切换的影响具有重要意义。本文以发电厂厂用电为例,利用PSCAD/EMTDC仿真工具,深入研究了感应电动机参数对电源快速切换、同期捕捉切换和残压切换的三种方式的影响。研究发现快速切换、同期捕捉切换方式的影响参数主要是电动机惯性常数和负荷转矩的负载率;而残压切换方式主要受转子电阻,励磁电抗和负荷转矩的负载率的影响。本文研究对于研制更为有效的厂用电切换装置和选择更为科学的厂用电切换方式具有一定的参考意义。更多还原

【Abstract】 Power supply transfer device is the main instrument for protecting large-scale factory when the main power source is interrupted.For the modern factories,induction motors are the main load.It is significant to study the influence of induction motor load parameters on power supply transfer.Taking a power plant auxiliary as the subject investigated and using the professional toolset PSCAD/EMTDC,the influence of induction motor load parameters on high-speed,synchronization capture and residual voltage transfers is analyzed.The study results show that the main parameters influencing on high-speed and synchronization capture transfer are inertia constant and load rate.Residual voltage transfer is more easily influenced by rotor resistance,excitation reactance and load rate.The study is a reference to develop effective power supply transfer device and select rational transfer method.更多还原