Finite-control set model-predictive control for single-phase voltage-source UPS inverters

Inverters are commonly controlled to generate AC current and Total Harmonic Distortion (THD) is the core index in judging the control effect. In this paper, a THD oriented Finite Control Set Model Predictive Control (FCS MPC) scheme is proposed for the single-phase inverter, where a optimization problem is solved to obtain the switching law for realization. Different from the traditional cost function, which focuses on the instantaneous deviation of amplitude between predictive current and its reference, we redesign a cost function that is the linear combination of the current fundamental tracking error, instantaneous THD value and DC component in one fundamental cycle (for 50 Hz, it is 0.02 s). Iterative method is developed for rapid calculation of this cost function. By choosing a switching state from a FCS to minimize the cost function, a FCS MPC is finally constructed. Simulation results in Matlab/Simulink and experimental results on rapid control prototype platform show the effect of this method. Analyses illustrate that, by choosing suitable weight of the cost function, the performance of this THD oriented FCS MPC method is better than the traditional one.

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Current-sensorless Finite-Control-Set Model Predictive Control for Three-level Voltage Source Inverter

10.1109/iciea51954.2021.9516408 ◽

2021 ◽

Author(s):

Kaixin Wang ◽

Shengwei Chen ◽

Yuhang Tang ◽

Yong Yang ◽

Mingdi Fan ◽

...

Keyword(s):

Model Predictive Control ◽

Predictive Control ◽

Voltage Source ◽

Voltage Source Inverter ◽

Finite Control ◽

Control Set ◽

Current Sensorless

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Active damping method for voltage source inverter-based distributed generator using multivariable finite-control-set model predictive control

International Journal of Power Electronics and Drive Systems (IJPEDS) ◽

10.11591/ijpeds.v12.i1.pp334-344 ◽

2021 ◽

Vol 12 (1) ◽

pp. 334

Author(s):

Jonggrist Jongudomkarn ◽

Warayut Kampeerawat

Keyword(s):

Model Predictive Control ◽

Predictive Control ◽

Active Damping ◽

Superior Performance ◽

Voltage Source ◽

Lcl Filter ◽

Grid Voltage ◽

Grid Current ◽

Finite Control ◽

Control Set

Despite its advantages, the LCL filter can significantly distort the grid current and constitute a substantially more complex control issue for the grid-connected distributed generators (DGs). This paper presents an active damping approach to deal with the LCL filter's oscillation for the finite-control-set model predictive control (FCS-MPC)-three-phase voltage source inverters (VSIs)-based DG. The new approaches use the multivariable control of the inverter side's filter current and capacitor voltage to suppress the LCL filter resonance. The proposed method has been tested in steady-state and under grid voltage disturbances. The comparative study was also conducted with the existing virtual resistance active damping approaches for an FCS-MPC algorithm. The study validates the developed control schemes' superior performance and shows its ability to eliminate lower-order grid current harmonics and decrease sensitivity to grid voltage distortion.

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Performance Assessment of Grid Forming Converters Using Different Finite Control Set Model Predictive Control (FCS-MPC) Algorithms

Applied Sciences ◽

10.3390/app9173513 ◽

2019 ◽

Vol 9 (17) ◽

pp. 3513 ◽

Cited By ~ 3

Author(s):

Mohammed Alhasheem ◽

Frede Blaabjerg ◽

Pooya Davari

Keyword(s):

Model Predictive Control ◽

Predictive Control ◽

Point Of View ◽

Voltage Source ◽

Voltage Source Converter ◽

Linear Load ◽

Three Phase ◽

Comparable Performance ◽

Finite Control ◽

Control Set

Finite control set model predictive control (FCS-MPC) methods in different power electronic applications are gaining considerable attention due to their simplicity and fast dynamics. This paper introduces an assessment of the two-level three-phase voltage source converter (2L-VSC) utilizing different MPC schemes with and without a modulation stage. In order to perform such a comparative evaluation, 2L-VSC efficiency and total harmonics distortion of the voltage (THDv) have been investigated, when considering a linear load. The results demonstrate the performance of different MPC algorithms through an experimental verification on a Danfoss converter, and a set of analyses have been studied using the PLECS and MATLAB/SIMULINK together. It can be concluded that a comparable performance is achieved by using conventional MPC (CMPC), improved MPC (IMPC), periodic MPC (PMPC), and MPC scheme with modulator (M 2 PC) controllers. The assessment is critical to classify the strategies as mentioned earlier according to their efficiency. Furthermore, it gives a thorough point of view on which algorithm is suitable for the grid-forming applications.

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