Objective holographic feedbacks linearization control for boost converter with constant power load. (January 2022)

• Record Type: Journal Article
• Authors: Li, Jiyong; Pan, Hengyu; Long, Xinxin; Liu, Bin
• Is Part Of: International journal of electrical power & energy systems. Volume 134(2022)
• Publication Date: 2022-01
• Subjects: Constant power load(CPL) -- Objective holographic feedbacks linearization control (OHFLC) -- DC power systems -- Pole-zero points -- Boost converter -- Input–output linearization(IOL); Electrical engineering -- Periodicals; Electric power systems -- Periodicals; Électrotechnique -- Périodiques; Réseaux électriques (Énergie) -- Périodiques; Electric power systems; Electrical engineering; Periodicals; 621.3
• DOI: 10.1016/j.ijepes.2021.107310
• Languages: English
• ISSNs: 0142-0615

Abstract

Highlights: The objective holographic feedbacks is introduced for the first time to design the control law of the power electronic model. This method can bypass the non-minimum phase system and use it directly. Under this control law, the response of the output voltage of the system after the external interference presents a single-pole response. It is proved mathematically that the essence of this method is to make the poles of the system fall at the corresponding positions by adjusting the control parameters. Abstract: As a typical load, the constant power load (CPL) is different from the resistive load and has destabilizing negative impedance characteristics, influencing the system stability. The boost converter with the output voltage as the feedback control variable is a non-minimum phase nonlinear system because its linear approximation has a right-half-plane (RHP) pole. The non– minimum phase system limits the application of control techniques such as input–output linearization (IOL). This paper presents an objective holographic feedbacks linearization control strategy (OHFLC) for DC power systems with constant power loads, bypassing non-minimum phase systems to stabilize the system. The analysis of the proposed method's pole-zero points indicates that it is based on placing the pole-zero points of the system on their corresponding desired positions through feedback so as to achieve satisfactory dynamic and static performance of the control system. Finally, simulation and experimental verification demonstrate that the presented control approach provides superior dynamic response and robustness than the traditional proportional-integral (PI) control.