基于三相异步电机电压平衡性设计仿真研究

Research and Simulation of Three-Asynchronous Motors Based on Voltage Balance Design

核电厂中的三相不平衡现象会使大型异步电机等电气设备的运行变得复杂,进而对电机驱动的重要核电设备的运转产生诸多影响。为了改善在三相不平衡电压下核电厂中关键设备的运行安全,需要针对三相异步电机的电压平衡特性进行研究,应用基础电机学理论与对称分量法对其建立数学模型并形成算法,使其适用于各种电压不平衡工况。将算法模型应用至某地区核电厂的全范围模拟机中进行算例分析,仿真结果验证了上述算法模型准确可靠。并为核电厂异步电机驱动设备的三相不平衡运行分析提供了依据。

the phenomenon of unbalanced three - phase in the nuclear power plant will make the operation of large - capacity asynchronous motors more complex, and influence the important nuclear equipment driven by the motors. In order to improve the equipment safety in the nuclear power plant under the unbalanced three - phase condition, it is necessary to analyze the voltage balance characteristic of three - phase asynchronous motors. A new algorithm was presented based on Eleetromeehanics theory and Symmetrical Component Method, which is suitable for all kinds of voltage unbalance conditions. Then the simulation test is made by applying the algorithm to the Full Scope Simulator of a certain area. Finally, this algorithm was proved to be reliable by comparing and analyzing the simulation results, and can provide data for the analysis of unbalanced three - phase operation of the equipment driven by asynchronous motors in the nuclear power plant.