Performance of model predictive control approach for single‐phase distributed energy grid integration with PQ control

Abstract

This study investigates the performance of finite control set-model predictive control (FCS-MPC) strategy employed for the control of active (P) and reactive power (Q) injected to the grid from a distributed energy resource using a single-phase grid-tied inverter. In the study, three different computational methods are utilised to create the orthogonal components of grid current and voltage in the stationary reference frame that are required for PQ computations. The obtained results indicate that FCS-MPC approach is effective to provide flexible control of the power injected to the grid. Moreover, the steady state and transient performance of P and Q components are affected by the method of creating the imaginary quadrature component. Owing to the results, the second-order generalised integrator method provides the best steady state performance in terms of the lowest total harmonic distortion of grid current and minimum resultant peak-peak power ripple. While the quarter cycle phase delay method results in the worst transient behaviour owing to an unavoidable time delay of 0.005 s in case of 50 Hz supply system. In addition, the robustness of the FCS-MPC system is examined against parameters variation over a wide range. The overall FCS-MPC system is studied using PSIM ® software.

MMC-Based PV Single-Phase System with Distributed MPPT

“…Because a single-phase system was analyzed, we decided to use one of the orthogonal signal techniques [32,33] and dq transformations, which made it possible to implement the control system in a synchronous reference frame [34]. The orthogonal signal generation techniques needed to create a fictitious imaginary component of the real electric quantity.…”

A model predictive fault‐tolerant control strategy for non‐redundant T‐inverters with multiphysics‐circuit coupling loss analysis

“…Although this reduces voltage prediction time, it also increases power switch usage, which may compromise reliability and increase costs. An alternative four‐phase redundant structure is proposed in previous studies, 19,20 but its improved control using a sliding mode observer results in longer computation time and response delay 21. Compared to the four‐phase redundant configuration, the three‐phase eight‐switch inverter offers advantages of simpler topology and higher reliability 22,23…”

“…Although this reduces voltage prediction time, it also increases power switch usage, which may compromise reliability and increase costs. An alternative four-phase redundant structure is proposed in previous studies, 19,20 but its improved control using a sliding mode observer results in longer computation time and response delay.21 Compared to the four-phase redundant configuration, the three-phase eight-switch inverter offers advantages of simpler topology and higher reliability. 22,23 With the actual operation of three-level inverters as the background, this paper investigates an economical faulttolerant reconfiguration method from three-phase to two-phase system, under the real-time intervention of the drive protection circuit.…”

Model Predictive Current Control with Fixed Switching Frequency and Dead-Time Compensation for Single-Phase PWM Rectifier

“…Ref. [26] analyzed the performance of the FCS-MPC strategy to control the active power and reactive power of the single-phase grid-connected inverter, but the switching frequency was still not fixed. Ref.…”