基于Multisim的三相电路特性仿真实验

针对真实三相电路实验教学的不足,分析了应用电路仿真软件辅助实验教学的必要性,利用Multisim对Y-Y方式三相电路特性的仿真,研究了对称三相电源、有/无中线三相对称负载、有/无中线三相不对称负载等负载变化对三相电路的影响及中性线的作用,并阐述了有功功率的测量方法,虚拟仿真实验结果和理论分析计算结果相一致,验证了软件仿真效果理想。实践证明,将Multisim仿真实验与传统实验两者有机结合,相得益彰,能更好地推动实验教学,提高学生的综合素质。

Simulation Experiments for Characteristics of Three-Phase Circuit Based on Multisim

Focusing on deficiencies in real three-phase circuit experiment sessions,necessities of supporting experimental teaching with circuit simulation software are analyzed.By using Multisim simulation of Y-Y type three-phase circuits,influences of three-phase symmetrical power source,three phase symmetrical load with/without neutral line,three-phase unsymmetrical load with/without neutral line and other variable loads on the three-phase circuits are studied,functions of the neutral line are discussed.In addition,a method to measure active power is introduced.The simulation results are consistent with theoretical analysis,which verifies the effectiveness of software simulation.Applications show that combining with traditional experiments,the Multisim simulation experiments can improve experimental teaching and students'overall ability.