Synchronous Generator Rectification System Based on Double Closed-Loop Control of Backstepping and Sliding Mode Variable Structure

Liu, Jinfeng; Qu, Xin; Iu, Herbert Ho Ching

doi:10.3390/electronics10151832

Cited by 5 publications

(4 citation statements)

References 23 publications

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“…However, since the PWM rectifier is a nonlinear system, when the system parameters change or perturbation occurs, the traditional control method is difficult to obtain good robustness of the PWM rectifier due to the fixed transfer function parameter settings. Literature [3,4] proposes an improved PR control, which is a strategy to improve the stability of the system by appropriately reducing the gain at the resonant frequency. However, the accuracy of this method in regulation is not easy to determine.…”

Section: Introductionmentioning

confidence: 99%

Improved study on double closed-loop control of three-phase PWM rectifier based on induction heating rectifier side

Zheng,

Guo

2024

J. Phys.: Conf. Ser.

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With the development of power electronics technology, induction heating power supply becomes more applicable. The three-phase PWM rectifier is widely used in induction heating system because of its advantages of better power factor and bi-directional energy transfer, and often adopts the control method of voltage outer loop and current inner loop to improve its control performance. However, the traditional rectifier control structure in the application process will appear such as poor anti-interference ability, low fault tolerance and other outstanding problems. In this paper, an improved H∞ controller is designed for the induction heating system based on the rectifier-side power regulation by combining the robust control principle, establishing a state space model of the system with an equivalent series resonant load, firstly decoupling the linearization of the model, and then designing a double-closed-loop PI controller as well as an improved current inner-loop H∞ controller based on the decoupled model. In order to facilitate the analysis, the PI controller and the H∞ controller are simulated under two kinds of starting conditions, and the comparison further confirms that the improved system has better anti-interference ability and dynamic characteristics.

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Section: Introductionmentioning

confidence: 99%

Improved study on double closed-loop control of three-phase PWM rectifier based on induction heating rectifier side

Zheng,

Guo

2024

J. Phys.: Conf. Ser.

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“…On the other hand, due to the coupling relationship between the output capacity of the unit and the fuel economy and the speed, the unit needs to switch to different target speed points frequently according to the driving demand [9][10][11][12]. In response to the above problems, scholars have proposed control strategies, such as constant speed QFT (Quantitative Feedback Theory) robust control, fuzzy control, and sliding mode control [13][14][15][16]. However, due to the characteristics of the ultralight power station system, such as small inertia, small capacity, high speed rating of the power generation unit, and unbuffered energy storage unit, the above strategies are not applicable.…”

Section: Introductionmentioning

confidence: 99%

A Compound Control Strategy for an Ultralight Power Generation System

Wen,

Yuan,

Yuan

et al. 2024

Energies

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Ultralight power generation equipment has high requirements for the power density, continuous operation, and transient stability of the whole machine, and there is a direct conflict between high power density and substantial stability control in the power unit design. In order to meet the power density requirements of ultralight power stations, three main problems need to be solved, namely engine speed oscillation and flameout in the process of load power mutation, matching of the generator and engine torque, and stabilizing the voltage waveform of the AC output end. In this paper, we proposed an exquisite compound control strategy for ultralight power generation systems in engines, generators, and inverters. The effectiveness and practicability of the proposed strategy are verified by both simulation and experiment. The results show that the proposed control strategy can effectively solve the instability problem of the ultralight generator set and improve the stability of the system, where response recovery can be achieved within 0.9 s under the conditions of a total load increase or decrease, and the mismatching degree of the generator following the engine is reduced by 90%. The strategy could also guarantee long-term stable operation with high-quality electrical energy output.

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“…Including the back-stepping method (Back-stepping) [4], [5] and sliding mode variable structure [6]. [7]. Nonlinear algorithms, including Backstepping and Sliding Mode Variable Structure, are better suited to the nonlinear characteristics of UAVs and can provide better control performance over a wide range centered on the equilibrium point [8]- [10].…”

Section: Introductionmentioning

confidence: 99%

Disturbance feedforward compensation based on Modelica modeling with the Self-immunity study of a quadrotor UAV

ZHOU,

BAO,

LIANG

et al. 2023

Preprint

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Due to the nonlinearity, underactuated, strong coupling, multi-data flow direction, and vulnerability to internal and external disturbances, the widely used PID control technology has been very difficult. Some emerging nonlinear control theory algorithms have good simulation performance, but they rely heavily on exact mathematical models, require a large amount of computation, and take a long time to solve. Therefore, based on the advantages of non-causal declarative modeling in Modelica language, this paper focuses on the analysis and implementation of the mechanism of observation, estimation, and compensation of nonlinear ADRC disturbances, PID-NLADRC linear nonlinear combined control strategy is designed to realize the flight control of a four-rotor UAV. The multi-target applications, such as fixed-point hover, cone spiral trajectory tracking and air obstacle avoidance fillet moment trajectory tracking, are verified respectively. The simulation results show that the designed PID-NLADRC control strategy has better performance than the Cascade PID control strategy in suppressing the fixed-point hover disturbance, it is fully verified that the PID-NLADRC control strategy has a smaller Euclidean range deviation and stronger disturbance rejection ability for tracking trajectories with different properties such as plane or space, smooth or transient, it can better meet the requirements of fast, accurate and robust flight control of four-rotor UAV.

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Synchronous Generator Rectification System Based on Double Closed-Loop Control of Backstepping and Sliding Mode Variable Structure

Cited by 5 publications

References 23 publications

Improved study on double closed-loop control of three-phase PWM rectifier based on induction heating rectifier side

Improved study on double closed-loop control of three-phase PWM rectifier based on induction heating rectifier side

A Compound Control Strategy for an Ultralight Power Generation System

Disturbance feedforward compensation based on Modelica modeling with the Self-immunity study of a quadrotor UAV

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