控制器硬件在环混合仿真系统延时及补偿方法

Time-delay and compensation for CHIL simulation system

基于实时数字仿真器(RTDS)建立了并网逆变器的控制器硬件在环混合仿真系统。分析系统延时产生的原因及组成,针对延时对混合仿真系统稳定性、仿真精度及带宽的影响进行建模分析,并提出一种基于改进离散傅里叶变换算法的延时补偿方法,可以有效地补偿延时影响,以提高系统的稳定性及仿真精度。理论分析及实验结果证明了所提方法的有效性。

A CHIL（Controller Hardware-In-the-Loop） simulation system based on RTDS（Real-Time Digital Simulator） is established for the grid-connected inverter. The cause of system time-delay and its composition are studied and the effect of time-delay on the simulation system in its stability,precision and bandwidth is analyzed. The improved discrete Fourior transform algorithm is proposed to compensate the time-delay for improving the system stability and simulation accuracy. Theoretical analysis and experimental result prove the effectiveness of the proposed method.