Power-Linked Predictive Control Strategy for Power Electronic Traction Transformer

Zhao, Nan; Liu, Jianqiang; Yu, Anchi; Yang, Jingxi; You, Xiaojie

doi:10.1109/tpel.2019.2952914

Cited by 32 publications

(26 citation statements)

References 28 publications

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“…As can be seen, the DAB is formed by two single-phase bridges with a complementary switching cycle, where two high-frequency square-wave signals are generated. The power flow regulation across the DAB can be achieved by a shift between these two voltage signals [71][72][73][74]. These two square-wave-phase-shifted voltages create a voltage across this leakage inductance, making a current circulate through it.…”

Section: Main Grid and Three-phase Rectifiermentioning

confidence: 99%

Optimal Tuning of Fractional Order Controllers for Dual Active Bridge-Based DC Microgrid Including Voltage Stability Assessment

Azab

Serrano‐Fontova

2021

Electronics

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In this article, three evolutionary search algorithms: particle swarm optimization (PSO), simulated annealing (SA) and genetic algorithms (GA), have been employed to determine the optimal parameter values of the fractional-order (FO)-PI controllers implemented in the dual active bridge-based (DAB) DC microgrid. The optimum strategy to obtain the parameters of these FO-PI controllers is still a major challenge for many power systems applications. The FO-PI controllers implemented in the DAB are used to control the DC link voltage to the desired value and limit the current flowing through the converter. Accordingly, the investigated control system has six parameters to be tuned simultaneously; Kp1, Ki1, λ1 for FO-PI voltage controller and Kp2, Ki2, λ2 for FO-PI current controller. Crucially, this tuning optimization process has been developed to enhance the voltage stability of a DC microgrid. By observing the frequency-domain analysis of the closed-loop and the results of the subsequent time-domain simulations, it has been demonstrated that the evolutionary algorithms have provided optimal controller gains, which ensures the voltage stability of the DC microgrid. The main contribution of the article can be considered in the successful application of evolutionary search algorithms to tune the parameters of FO-based dual loop controllers of a DC microgrid scheme whose power conditioner is a DAB topology.

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Section: Main Grid and Three-phase Rectifiermentioning

confidence: 99%

Optimal Tuning of Fractional Order Controllers for Dual Active Bridge-Based DC Microgrid Including Voltage Stability Assessment

Azab

Serrano‐Fontova

2021

Electronics

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“…If the power of a single motor is increased to enhance the driving force only, on the one hand, the start of the high-power motor will have an impact on the power grid of the coal mine. On the other hand, the huge driving force will exceed the tension limit of the conveyor belt, and cause the belt to break, so general large belt conveyors are often driven by multiple motors [2]- [4]. However, it is also accompanied complex system control problems by using multi-motor drive, the most prominent problem of which is the balanced load distribution among multiple motors, that is, the power balance distribution of multiple motors.…”

Section: Introductionmentioning

confidence: 99%

Power Balance Control Strategy of Permanent Magnet Synchronous Motor of Belt Conveyor

Wen

et al. 2022

IEEE Access

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Aiming at the problem of multi-machine power balance control of long distance belt conveyor with double drum and three permanent magnet synchronous motor, the control method of speed and torque of master and slave motors of belt conveyor driven by multiple motors is analyzed. According to the properties of coaxial rigid connection and flexible connection of three motors of double drum, The power balance strategy based on fuzzy Active Disturbance Rejection Controller (ADRC) is proposed to achieve the purpose of disturbance rejection and improve the stability of the system. The simulation results show that the proposed method can solve the power imbalance problem of the system motor. Compared with the traditional PID control method, the corresponding speed of fuzzy ADRC control method is less than 300ms, the power deviation of rigid connected motor is less than 0.1kW, and the power deviation of flexible connected motor is less than 0.3kW. This method can effectively reduce the synchronization error of each motor, and has good robustness, and realize the power balance distribution among multiple motors.

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“…in the early 1990s [1]. Because DAB converters have the advantages of wide voltage range regulation, double quadrant operation, and ease of realizing soft‐switching, therefore, they are widely used in the flexible DC microgrid, energy storage system, electric vehicles, power electronic transformers, and in other fields [1–10]. To achieve high efficiency, the DAB converters must have low circulating energy and a wide soft‐switching range.…”

Section: Introductionmentioning

confidence: 99%

Research on efficiency optimisation of DAB converters considering current stress and soft‐switching

Zeng

Rao

Lan

et al. 2021

IET Power Electronics

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To solve the problem of low efficiency of the dual active bridge (DAB) converter under the traditional single‐phase‐shift control, a natural soft‐switching current stress optimisation (NSS‐CSO) method is proposed by considering the current stress optimisation and soft‐switching operation under dual‐phase‐shift (DPS) control. This study establishes the current stress and the soft‐switching analytical models of the DPS control global mode. Based on these models, the Karush–Kuhn–Tucker (KKT) condition is used to analyse the influence of the current stress optimisation methods on the efficiency when all switches achieve controlled soft‐switching or some switches achieve natural soft‐switching. It is found that the NSS‐CSO method is more efficient. Furthermore, the optimal phase‐shift ratio combinations and the corresponding current stress extremums of the NSS‐CSO method under various ranges of transmission power and voltage conversion ratio are deduced completely. The results of this study show that the NSS‐CSO method can effectively improve the operation efficiency of the DAB converter over the entire power range when the voltage conversion ratio does not match. Finally, experimental results confirm the accuracy of the theoretical analysis and the effectiveness of the proposed optimisation method.

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Power-Linked Predictive Control Strategy for Power Electronic Traction Transformer

Cited by 32 publications

References 28 publications

Optimal Tuning of Fractional Order Controllers for Dual Active Bridge-Based DC Microgrid Including Voltage Stability Assessment

Optimal Tuning of Fractional Order Controllers for Dual Active Bridge-Based DC Microgrid Including Voltage Stability Assessment

Power Balance Control Strategy of Permanent Magnet Synchronous Motor of Belt Conveyor

Research on efficiency optimisation of DAB converters considering current stress and soft‐switching

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