Averaged Dynamic Modeling and Control of a Quasi-Z-Source Inverter for Wind Power Applications

Soares-Ramos, Emanuel P. P.; Oliveira-Assis, Lais de; Sarrias‐Mena, Raúl; García‐Triviño, Pablo; García-Vázquez, Carlos Andrés; Fernández‐Ramírez, Luis M.

doi:10.1109/access.2021.3104797

Cited by 10 publications

(8 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4 Compared to 2018, it is expected that the electricity generation using PV systems will be approximately increased by six times at the end of 2050, and as a result, the total application of PV systems will be more than 372GW by the end of 2050. 5,6 PV systems are utilized in both off-grid and grid-connected applications. 7 Grid-connected PV systems are tied to the distribution network through the power electronics converters.…”

Section: Introductionmentioning

confidence: 99%

“…So it isn't surprising news that about 125 GW of the PV system will be installed worldwide between 2020 and 2024 4 . Compared to 2018, it is expected that the electricity generation using PV systems will be approximately increased by six times at the end of 2050, and as a result, the total application of PV systems will be more than 372GW by the end of 2050 5,6 …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A novel MIMO SMC for comprehensive unified control of the cascaded DC‐DC and DC‐AC converters in grid connected photovoltaic systems

Radmand,

Hosseini Firouz,

Salimi

et al. 2023

Circuit Theory & Apps

View full text Add to dashboard Cite

SummaryIt is well known that DC‐DC boost converters are cascaded with DC‐AC inverters for grid connection of the photovoltaic (PV) systems. In the traditional control approaches, the mentioned DC‐DC and DC‐AC converters are controlled separately to facilitate the controller design problem. However, from the controller design viewpoint, the overall structure of the grid connected PV generator is a multi‐input multi‐output (MIMO) system. The duty cycle of the DC‐DC converter and inverter modulation index are the control inputs and, on the other hand, generated photovoltaic DC power and exported power to the grid are control outputs. Moreover, the inverter DC link voltage should be stabilized by the closed‐loop controller as well as an internal control output. If controllers are designed separately, it means that the interaction between DC‐DC and DC‐AC controllers isn't considered accurately, and since the isolated models of DC‐DC converter and DC‐AC inverter are extracted based on some approximated assumptions, separate controller design cannot guarantee stability and robustness of the whole system in a wide range of operation. To cope with these problems, in this paper, a novel MIMO sliding mode controller (SMC) is developed for comprehensive closed‐loop control of the DC‐DC boost converter cascaded with a single‐phase DC‐AC grid connected photovoltaic inverter. In the proposed approach, the dynamic model of whole system is developed comprehensively at first, and then, a unique MIMO controller is designed to control both DC‐to‐AC and DC‐to‐DC converters together. To cope with the nonlinear characteristic of the system and uncertainty of model parameters in a wide range, a fixed‐frequency SMC is developed using the comprehensive state space model of the closed loop system. In the proposed MIMO‐SMC controller, the AC power (which is exported to the grid) and operating point of the PV source are controlled via inverter modulation index and duty cycle of the DC‐DC boost converter, respectively. Another major advantage of the proposed system is mitigating the non‐minimum phase characteristic of the boost converter through the indirect control of inverter DC link capacitor. To evaluate the performance of the designed control system, simulation results are compared with a standard linear PI controller. It is shown that the developed system has zero steady‐state error and enjoys faster dynamic response during the start‐up and step changes of AC and DC current references. Moreover, it can maintain the stability of closed‐loop systems in a wide range of operations.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A novel MIMO SMC for comprehensive unified control of the cascaded DC‐DC and DC‐AC converters in grid connected photovoltaic systems

Radmand,

Hosseini Firouz,

Salimi

et al. 2023

Circuit Theory & Apps

View full text Add to dashboard Cite

show abstract

“…2 was introduced. The qZSI works in Continuous Conduction Mode (CCM) and reduces the stress on the relays and switches [13], [14], [15]. The qZSI has attracted a lot of research interest in improving its performance, both in terms of the power circuit [16], [17] and the control strategies [18], [19].…”

Section: Introductionmentioning

confidence: 99%

Implementation of New Optimal Control Methodology of Quazi Z-Source Inverter Based on MPC

et al. 2023

View full text Add to dashboard Cite

Model predictive control (MPC) is a well-known control methodology in power electronics systems, due to its ability to deal with the system's nonlinearities and superior dynamic response. MPC is able to handle multiple variables by adjusting the cost function, but this leads to high computational costs, especially for systems having a big number of switches. This problem increases when not only performance efficiency is required but also minimizing the power losses of these systems. In this paper, a modified MPC algorithm is presented for controlling a three-phase quasi Z-source inverter (qZSI), i.e., providing switching states to be applied for qZSI control, so that, within less computation time, total harmonic distortion (THD) of the output currents is maintained at the minimum level with concurrent minimization of inverter switch power losses. The computational burden is reduced by using calculation loop optimization, reducing the number of switching states in the loop and unrolling the calculation loop. To highlight the effectiveness of the proposed control methodology, a numerical simulation was carried out using MATLAB software. The obtained results have been discussed and compared with those of a recent previous study.INDEX TERMS Model predictive control (MPC), quasi Z-source inverter (qZSI), switching losses, conduction losses, total harmonic distortion (THD).

show abstract

“…With the increasing demand for high quality power supplies, PWM voltage source inverters have become an important unit of high-performance power conversion systems such as solar energy systems, wind energy systems and fuel cell systems [ 1 , 2 , 3 , 4 ]. High-performance PWM voltage source inverters must provide high quality AC output voltages, even at high load changing/non-linear loading, and feedback control technology can achieve such a goal.…”

Section: Introductionmentioning

confidence: 99%

Robust Optimal Control Design for Performance Enhancement of PWM Voltage Source Inverter

et al. 2022

View full text Add to dashboard Cite

PWM (pulse-width modulation) voltage source inverters are used in a wide range of AC power systems where the output voltage must be controlled to follow a sinusoidal reference waveform. In order to achieve precision and fast-tracking control, restrictive sliding mode control (RSMC) provides a fast system state convergence time. However, the RSMC still suffers from the chattering problem, which leads to high harmonic distortion and slow response of the inverter output state. Furthermore, the load of the inverter may be severe load changing and the control parameters become difficult to adjust, worsening the adaptability to achieve the desired control of the inverter output. In this paper, a robust optimal control design comprised of an enhanced restrictive sliding mode control (ERSMC) and density particle swarm optimization (DPSO) algorithm is proposed, and then applied to PWM voltage source inverters. The ERSMC not only has finite time convergence but also provides chatter elimination. The DPSO is highly adaptable for acquiring the control parameters of the ERSMC and finding the best solution in the global domain. The proposed controller is realized for the actual PWM voltage source inverter controlled by a TI DSP-based development platform, so that the inverter output voltage has fast dynamic response and satisfactory steady-state behavior despite high load changing and non-linear disturbances.

show abstract

Averaged Dynamic Modeling and Control of a Quasi-Z-Source Inverter for Wind Power Applications

Cited by 10 publications

References 36 publications

A novel MIMO SMC for comprehensive unified control of the cascaded DC‐DC and DC‐AC converters in grid connected photovoltaic systems

A novel MIMO SMC for comprehensive unified control of the cascaded DC‐DC and DC‐AC converters in grid connected photovoltaic systems

Implementation of New Optimal Control Methodology of Quazi Z-Source Inverter Based on MPC

Robust Optimal Control Design for Performance Enhancement of PWM Voltage Source Inverter

Contact Info

Product

Resources

About