Application research on auto-disturbance rejection controller in superconducting magnetic energy storage

As a new control strategy, auto-disturbance-rejection controller (ADRC) has been introduced in the power system successfully. The controller is free of planting model foundation in the design procedure and realized simply. In this paper, a ADRC used for superconducting magnetic energy storage (SMES) unit connected to a power system is proposed. Purpose of designing such controller is to improve the stability of the power system in a relatively wide operation range. The design procedure takes into account the active and reactive power cooperative control scheme. As well as the hardware design and implementation of the proposed controller is presented. At the same time, simulation is carried out to investigate the performance of the proposed controller. Results show not only satisfactory control performance but also good robustness of the controller. The feasibility of the controller is also testified.