Robust model predictive control for three-level voltage source inverters

Hong, Jianfeng; Zhang, Xing; Cao, Renxian

doi:10.1007/s43236-021-00230-y

Cited by 4 publications

(5 citation statements)

References 23 publications

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“…Therefore, only the first term e T (k+1)e(k+1)/2 needs to be equal to zero to ensure system stability, i.e., e(k+1)=0. The second sub-equation of ( 3) is substituted into (13) to obtain the Lyapunov control law, which can be expressed as:…”

Section: Ceffect Of Parameter Mismatch On Mpccmentioning

confidence: 99%

“…Then, the perturbations are compensated into the controller and the predictive model is updated in real time. Thus, the robustness and stability of the system are improved [13][14][15].…”

Section: Proposed Mfpcc Algorithmmentioning

confidence: 99%

“…In [12], a sliding-mode observer is constructed to estimate the perturbations due to ultra-local modeling, based on [11]. [13] introduces Lyapunov's law while constructing a Luenberger observer for observing the perturbations due to parameter mismatch. Compared with the above two state observers, the Kalman filter (KF) is more accurate in state estimation due to the noise interference during system operation.…”

Section: Introductionmentioning

confidence: 99%

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Model-Free Predictive Current Control of Three-Level Grid-Connected Inverters With LCL Filters Based on Kalman Filter

et al. 2023

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With the high-speed development of digital signal processors, model predictive current control (MPCC) has been widely used in power converters. However, the control robustness of MPCC is poor because of its strong dependence on the model parameters. In this paper, an ultra-local model-free predictive current control (MFPCC) for three-level grid-connected inverters (GCI) with LCL filters is proposed. Based on ultralocal theory, a third-order ultra-local model of the GCI with LCL filters is constructed. Then, a Kalman filter (KF) is introduced to estimate the three perturbations. Moreover, the perturbations are compensated to the predictive current model, thus reducing the number of model parameters involved in the predictive control. Finally, simulation results show that the proposed MFPCC improves the tracking performance of the grid current and strengthens the dynamic response capabilities under the parameter mismatch. Furthermore, the output power quality becomes higher, and the system robustness is also enhanced under noisy environment.

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Section: Ceffect Of Parameter Mismatch On Mpccmentioning

confidence: 99%

“…Then, the perturbations are compensated into the controller and the predictive model is updated in real time. Thus, the robustness and stability of the system are improved [13][14][15].…”

Section: Proposed Mfpcc Algorithmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Model-Free Predictive Current Control of Three-Level Grid-Connected Inverters With LCL Filters Based on Kalman Filter

et al. 2023

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“…This technique used the reference voltage vector; however, the appropriate reference voltage could not be estimated easily, and the technique required large computational time for execution. The next approach introduced model predictive control (MPC), which required a predefined cost function to predict the output states to obtain state variables and execute control-object optimization [12][13][14][15][16][17][18][19]. Another approach for improving the classical DTC involved controlling the duty ratios of the applied voltage vectors (DDTC) [20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Four-Level Hysteresis-Based DTC for Torque Capability Improvement of IPMSM Fed by Three-Level NPC Inverter

Hakami

Lee

2020

Electronics

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Direct torque control (DTC) is considered one of the simplest and fastest control strategies used in motor drives. However, it produces large torque and flux ripples. Replacing the conventional two-level hysteresis torque controller (HTC) with a four-level HTC for a three-level neutral-point clamped (NPC) inverter can reduce the torque and flux ripples in interior permanent magnet synchronous motor (IPMSM) drives. However, the torque will not be controlled properly within the upper HTC bands when driving the IPMSM in the medium and high-speed regions. This problem causes the stator current to drop, resulting in poor torque control. To resolve this problem, a simple algorithm based on a torque error average calculation is proposed. Firstly, the proposed algorithm reads the information of the calculated torque and the corresponding torque reference to calculate the torque error. Secondly, the average value of torque error is calculated instantaneously as the reference torque changes. Finally, the average value of the torque error is used to indicate the operation of the proposed algorithm without the need for motor speed information. By using the proposed algorithm, the torque can be controlled well in all speed regions, and thus, a better stator current waveform can be obtained. Simulation and experimental results validate the effectiveness of the proposed method.

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“…The demands for higher efficiency and power have increased the research on topics related to power converters, in various industrial areas and energy-conversion fields [1][2][3][4]. A multilevel power converter has several advantages such as low power loss, high power output, and higher voltage capability [5][6][7][8]. Among the various multilevel converters, the three-level voltage-source converter (3-L VSC) has the advantages of bidirectional power-flow capability and low voltage stress for each switching device.…”

Section: Introductionmentioning

confidence: 99%

Switch Open-Fault Detection for a Three-Phase Hybrid Active Neutral-Point-Clamped Rectifier

Kim

Park

et al. 2020

Electronics

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This paper proposes a fault-detection method for open-switch failures in hybrid active neutral-point-clamped (HANPC) rectifiers. The basic HANPC topology comprises two SiC-based metal-oxide-semiconductor field-effect transistors (MOSFETs) and four Si insulated-gate bipolar transistors (IGBTs). A three-phase rectifier system using the HANPC topology can produce higher efficiency and lower current harmonics. An open-switch fault in a HANPC rectifier can be a MOSFET or IGBT fault. In this work, faulty cases of six different switches are analyzed based on the current distortion in the stationary reference frame. Open faults in MOSFET switches cause immediate and remarkable current distortions, whereas, open faults in IGBT switches are difficult to detect using conventional methods. To detect an IGBT fault, the proposed detection method utilizes some of the reactive power in a certain period to make an important difference, using the direct-quadrant (dq)-axis current information derived from the three-phase current. Thus, the proposed detection method is based on three-phase current measurements and does not use additional hardware. By analyzing the individual characteristics of each switch failure, the failed switch can be located exactly. The effectiveness and feasibility of the proposed fault-detection method are verified through PSIM simulations and experimental results.

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Robust model predictive control for three-level voltage source inverters

Cited by 4 publications

References 23 publications

Model-Free Predictive Current Control of Three-Level Grid-Connected Inverters With LCL Filters Based on Kalman Filter

Model-Free Predictive Current Control of Three-Level Grid-Connected Inverters With LCL Filters Based on Kalman Filter

Four-Level Hysteresis-Based DTC for Torque Capability Improvement of IPMSM Fed by Three-Level NPC Inverter

Switch Open-Fault Detection for a Three-Phase Hybrid Active Neutral-Point-Clamped Rectifier

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