Losses evaluation for a two-level three-phase stand-alone voltage source converter using model predictive control

2017 ◽  
Author(s):  
M. Alhasheem ◽  
T. Dragicevic ◽  
M. Rivera ◽  
F. Blaabjerg
Keyword(s):  
Model Predictive Control ◽  
Predictive Control ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Three Phase

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

2019 ◽  
Vol 9 (17) ◽  
pp. 3513 ◽  
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.

scholarly journals Model Predictive Control of Grid Forming Converters with Enhanced Power Quality

2020 ◽  
Vol 10 (18) ◽  
pp. 6390
Author(s):  
Mohammed Alhasheem ◽  
Ahmed Abdelhakim ◽  
Frede Blaabjerg ◽  
Paolo Mattavelli ◽  
Pooya Davari
Keyword(s):  
Model Predictive Control ◽  
Power Quality ◽  
Predictive Control ◽  
Single Step ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Reference Trajectory ◽  
Computation Efficiency ◽  
Switching Behaviour ◽  
Control Schemes

This paper proposes an enhanced finite control set model predictive control (FCS-MPC) strategy for voltage source converter (VSC) with a LC output filter. The proposed control scheme is based on tracking the voltage reference trajectory by using only a single-step prediction within the controller horizon. Besides, the suitability of different frequency control schemes with the proposed scheme to prevent from inherent variable switching behaviour of conventional FCS-MPC is investigated. Based on that, the proposed method targets two major factors influencing power quality in grid forming applications by enhancing the output voltage harmonic distortion and also preventing variable switching behaviour of FCS-MPC. Although compared to multi-step prediction approaches, only a single-step multi-objective cost function to improve computation efficiency is utilized, the introduced control schemes are able to deliver higher power quality compared to its counterpart methods as well. Furthermore, the effect of different applied cost functions on the transient response of the system is studied and investigated for the future use of the VSC in microgrids (MGs). The effectiveness of the proposed scheme was assessed by simulation using MATLAB/SIMULINK and experiment using a 5.5 kVA VSC module and the results were in good agreement.

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