Visual Analysis of PCS Cascaded Control System Based on D-Partition Method

The existing methods are difficult to realize the performance analysis of cascaded control system with optional parameters of mobile energy storage system (MESS). This paper has proposed a visual analysis method based on D-partition method, which is easily and intuitively to present the performance of cascaded control system considering all optional parameters. Firstly, the dual loop model of power conversion system (PCS) is established, consider the current sampling at bridge arm side and load side respectively. Secondly, stability regions based on regulator parameters are obtained by means of D-partition method. Furthermore, influences of regulator parameters, load variation as well as electrical parameters selection on loop performance are analyzed via visual graphics. Finally, experiments are carried out on l100kW PCS platform and the theoretical analysis is proved practical and effective.