Abstract
This paper proposes an improved backstepping control approach which uses error-compensation and the sliding mode variable structure control to achieve stability for a single machine infinite bus system (SMIBS) with a static synchronous compensator (STATCOM). An adaptive sliding mode control was also utilised to obtain strong response performance in order to avoid excitation and the unknown parameters generated by the recursive steps of traditional backstepping control. Increasing the error-compensation term was used to generate a new virtual control to guarantee that the system states are more rapid stable and eliminate system chattering effectively generated by traditional sliding mode control. The boundedness and convergence of the closed-loop system were then obtained based on Lyapunov stability theory. Finally, a simulation is demonstrated to illustrate the effectiveness and the practicality of the proposed control method.
Highlights
It is well known that the stability of a single machine infinite bus system is becoming more significant and has been explored by many researchers, as demands for power generation continuously increases [1]
Nowadays flexible alternate current transmission system (FACTS) devices are highly-developed, including static synchronous compensators (STATCOMs), The associate editor coordinating the review of this manuscript and approving it for publication was Dongbo Zhao
In this paper, the nonlinear controller of the STATCOM for generators is designed by proposed adaptive backstepping method
Summary
It is well known that the stability of a single machine infinite bus system is becoming more significant and has been explored by many researchers, as demands for power generation continuously increases [1]. A controller based on the improved backstepping method of a single machine infinite bus power systems with uncertain parameters is investigated in [16]. For the multi-engine power system with boiler turbo generator set, the nonlinear adaptive controller of the power system is designed in [18], and the global control technology is used to improve the transient performance of the power system Both parameter updating laws and nonlinear adaptive controllers for a single machine infinite bus system with damping coefficient uncertainties have been studied in [19] and [20]. Due to [26] just considers the single-machine infinite system on generator steam valve of nonlinear power system, in this paper an improved backstepping method with errorcompensation is proposed to solve the stabilisation problem of STATCOM.
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