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This paper proposes a novel current control method based on Model Predictive Control (MPC) for three-phase inverters. The proposed method is based on an Adaptive MPC (A-MPC) with a PWM modulation. An innovative model parameter estimation and modification method is also proposed, leading to enhanced control accuracy. Comparing with traditional curre...
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Context 1
... a series of simulations through MATLAB/Simulink are conducted to compare the performances of common FCS-MPC based inverter control method and the proposed method. In order to take the simulation and experiments to a close agreement, the simulation model of the three-phase inverter is established according to the practical experiment parameters, which is listed as Table 1. As mentioned, in existing FCS-MPC based inverter control methods, the switching variables are directly selected according to the cost function by comparing all the possible variables, known as exhaustive method. ...Context 2
... order to verify the effectiveness of the proposal in practical applications and compare the performances with other traditional control methods, a series of experiments are conducted in a microgrid laboratory, as shown in Figure 10. Parameters of the controlled inverter and other devices of the experimental system are shown as Table 1. The experimental result is collected by ScopeCorder DL850E, which combines a mixed oscilloscope and data acquisition recorder. ...Context 3
... order to verify the effectiveness of the proposal in practical applications and compare the performances with other traditional control methods, a series of experiments are conducted in a microgrid laboratory, as shown in Figure 10. Parameters of the controlled inverter and other devices of the experimental system are shown as Table 1. The experimental result is collected by ScopeCorder DL850E, which combines a mixed oscilloscope and data acquisition recorder. ...Context 4
... order to verify the effectiveness of the proposal in practical applications and compare the performances with other traditional control methods, a series of experiments are conducted in a microgrid laboratory, as shown in Figure 10. Parameters of the controlled inverter and other devices of the experimental system are shown as Table 1. The experimental result is collected by ScopeCorder DL850E, which combines a mixed oscilloscope and data acquisition recorder. ...Similar publications
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Citations
... Moreover, MPC has the advantage of directly controlling power switches without using pulse width modulation [26][27][28]. It also allows several control objectives to be achieved while maintaining high performance; such as a fast response and acceptable stability during transient regimes [29,30]. Thanks to these advantages, MPC is considered as the most appropriate control technique for controlling MMCs. ...
... Thanks to these advantages, MPC is considered as the most appropriate control technique for controlling MMCs. In [30,31], MPC is used to control the AC current, circulating current and voltage balancing across capacitors simultaneously, using a single cost function. In [32,33], the MMC was controlled on the basis of two cost functions, one for alternating and circulating current and the other for capacitor voltage balancing. ...
... where n Ux and n Lx are the numbers of the actives SMs of the upper and lower arms respectively (from 0 to N). By applying the Kirchhoff's voltage law (KVL), the mathematical equations of phase X can be derived [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34]: ...
In this paper, a new combined control strategy based on model predictive control and active disturbance rejection control has been proposed to control a modular multilevel converter used for interfacing a floating photovoltaic system into the power grid. The proposed control consists of a combination of the active disturbance rejection controller for DC link voltage regulation and an optimized model predictive control strategy for power flow control and circulating current reduction for modular multilevel converter. The great number of submodules in the MMC converter increases the complexity of the MPC control and the calculation time for choosing the voltage vector to be synthesized according to the required cost function. In this paper, an optimized method is proposed to minimize the time of calculation and application of the vector voltage reference, this method is based on a local optimization for each elementary hexagon. A study is carried out in order to illustrate the performances of the proposed control strategy. A multiple case study approach is adopted to show the superiority of the active disturbance rejection model predictive control strategy in terms of rapid convergence, elimination of overshoot, and improved robustness under various disturbances and operating conditions.
... In order to increase the power exchange capacity, the two converters are connected in parallel. The main circuit topology of the interlinking converter used in this paper is shown in Figure 9 [25]. ...
The AC/DC hybrid microgrid has a large-scale and complex control process. It is of great significance and value to design a reasonable power coordination control strategy to maintain the power balance of the system. Based on hierarchical control, this paper designs a reasonable power coordination control strategy for AC/DC hybrid microgrid. For lower control, this paper designs a variety of control modes for each converter in different application scenarios. For the higher control, this paper analyzes the working mode of the system and designs the power coordination control strategy under the grid-connected and isolated island mode. In grid-connected operation, the DC bus voltage can be stabilized by adjusting the operation mode of the DC energy storage and the on-off of the secondary load. In isolated island operation, the DC sub-microgrid is the main microgrid, and the DC energy storage is the main power regulating equipment. This is based on the principle of “energy is in short supply in the system, DC energy storage finally discharge, energy supply exceeds demand in the system, DC energy storage gives priority to charging” of DC energy storage. By adjusting the control strategy of the micro-source, the reference power, and the on-off of the secondary load, the overall power balance is maintained. The Matlab/Simulink simulation software was used to build the AC/DC hybrid microgrid simulation model, which verified the effectiveness and stability of the proposed power coordination control strategy under various operating conditions.
