Grid Frequency Regulation Support from Back-to-Back Motor Drive System with Virtual-Synchronous-Generator-Based Coordinated Control

In this project, to achieve significant regulation of frequency without providing any back-up energy storage devices a new control strategy is proposed for the smart motor. In this proposed topology the inertia caused by synchronous generators is mitigated by employing the control of virtual synchronous generator. With this technique the solution for the lack of inertia is provided to enable inverter-interfaced distributed generators.  

In this proposed system to control smart motor a back-back motor drive which utilizes kinetic energy stored in rotating loads is employed. To achieve the significant frequency regulation, at the grid side of the back-to-back motor drive the VSG control is activated and between control of VSG and control of the motor speed the coordinated control is activated. Based on stability analysis the proposed controller parameters are regulated through simulation studies. The results are studied in the MATLAB/Simulink.

Keywords: Demand-side management, frequency control, frequency stability, inertia, motor drives, smart motor, virtual synchronous generator, weak grid.