Decoupled Deadbeat Current Controller For STATCOM Application

Abstract

Static Synchronous Compensator (STATCOM) is a critical device in modern power systems, providing reactive power support and voltage stabilization. Deadbeat controller has emerged as a promising solution to control various SATCOM applications providing fast transient response and robustness. However, a conventional deadbeat current controller is affected by control delays that can lead to performance degradation. The proportional-integral controller is another widely used control strategy in STATCOM applications. However, the operation of a proportional-integral controller is sensitive to the tuning parameters. Both these controllers have application-specific constraints and limitations, and none of them can provide an optimum performance for the STATCOM system on their own. This paper presents a novel current controller that utilizes the properties of both the proportional-integral and deadbeat current controllers. The proposed current controller mitigates cross-coupling effects and provides a wide control bandwidth, thereby ensuring quick, precise, and efficient regulation. Experimental results show that the proposed controller provides approximately 53.85 % higher bandwidth, 17.65 % faster rise time, and 13.51 % faster settling time compared to the conventional controller.