基于Simulink的同步发电机仿真代数环问题研究

Research on Algebraic Loop of Synchronous Generator Simulation Based on Simulink

代数环在Simulink仿真中普遍存在,代数环的存在会降低仿真速度和精度,甚至导致仿真出错。以同步发电机仿真为例,对Simulink仿真中出现的代数环问题及其消除方法进行研究。从同步发电机基本方程分析入手,探讨仿真中引起代数环的原因,指出代数环对系统仿真的影响,重点讨论利用拆解法和变换法消除代数环,并从仿真时间、仿真精度等方面,对消除代数环后系统仿真结果进行对比分析。结果表明:代数环消除后系统仿真速度明显提高;变换法较拆解法,在系统动态仿真精度上有显著优势。

The problem of algebraic loop is common in Simulink simulation.The existence of algebraic loop will reduce the speed and accuracy of simulation,and even lead to errors in simulation results.Taking the simulation of synchronous generator as an example,the problem of algebraic loop and its elimination method in Simulink simulation are discussed.Starting from the analysis of the basic equations of synchronous generator,the cause of algebraic loop in simulation is discussed,the influence of the algebraic loop on the system simulation is pointed out,using disassembly method and transformation method,focusing on eliminating the algebraic loop,the system simulation results after eliminating the algebraic loop by using several methods are compared and analyzed,from the aspects of simulation time and simulation accuracy.The results show that the simulation speed of the system is obviously improved after the algebraic loop is eliminated,and the transformation method has a significant advantage over the disassembly method in the dynamic simulation accuracy of the system.