基于时序分析的数字物理混合仿真技术(二)收敛性与准确性分析

Hardware-in-the-loop Simulation Technology Based on Timing Analysis Part Two Convergence and Accuracy

基于离散动态模型,对电力一次系统数字物理混合仿真的收敛性和准确性进行了研究。将混合仿真理解为一种数值方法,通过对离散动态模型的误差分析,得到了混合仿真的收敛性结论。混合仿真的准确性主要由混合仿真所收敛到的延时系统决定。推导了交流稳态下混合仿真的理论解和接口的功率折算关系,并通过混合仿真实验验证了理论分析的结论。

Based on the discrete dynamic model, the convergence and accuracy of power hardware-in-the-loop simulation （PHILS） are studied. PHILS works as a numerical approach, and by analyzing errors of the discrete dynamic model, the convergence of PHILS is proved. Because of convergence, the accuracy of PHILS is determined by the delayed system to which PHILS converges. The theoretical solution and the interface power conversion relationship for AC steady-state solution of PHILS are derived. To verify the theoretical conclusions, a PHILS experiment of a resistance circuit is implemented, and the experimental results are consistent with the theoretical analysis.