Tang Niang

A novel method for SVC using nonlinear slope reactance

The structure of Static Var Compensator (SVC) control system and compensation principle is briefly analyzed in this paper. Based on the control method of nonlinear norm transformation PID, a novel method for SVC using nonlinear slope reactance is presented. The simulation results show that the method can accelerate the stabilizing process and reduce rising time and overshoot obviously.

Analysis of dynamic characteristics and control techniques applied to permanent-magnet direct drive generator based on double time coordinate

The dynamic operating characteristics of direct drive permanent magnet synchronous generator (PMSG) were researched. A method of non-linear slope pre-charge for DC-bus voltage is proposed on purpose of protecting power electronic devices. By further analyzing, some problems of conventional control strategy for grid-connection are pointed out, and a novel analysis method named double-time coordinate system is proposed, based on which the corresponding control strategy is presented to suppress the gear twisting moment and reduce the impact of grid connected. Simulation and experimental results prove that the proposed theoretical analysis method and control strategy is effective under the platform PSCAD/EMTDC.