Virtual Flux Estimation for Sensorless Predictive Control of PWM Rectifiers Under Unbalanced and Distorted Grid Conditions

Rahoui, Adel; Bechouche, Alı; Seddiki, Hamid; Abdeslam, Djaffar Ould

doi:10.1109/jestpe.2020.2970042

Cited by 31 publications

(10 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This includes conflicts such as balancing performance in steady-state with low switching frequency operation. Regarding MPC methods applied to PWM rectifiers, they can be classified according to VOC and DPC techniques, including model predictive current control (MPCC) [9], model predictive virtual flux control (MPVFC) [8,10], model predictive direct power control (MPDPC) [9,11], and model predictive virtual flux direct power control (MPVFDPC) [7,12]. Despite sharing the prediction concept, these approaches utilize proper cost functions to obtain diverse performances, especially under conditions of distorted source voltage states.…”

Section: Introductionmentioning

confidence: 99%

High-Efficient Direct Power Control Scheme Using Predictive Virtual Flux for Three-Phase Active Rectifiers

Nguyen,

Kwak,

Choi

2024

Machines

View full text Add to dashboard Cite

In recent years, the pulse-width-modulation (PWM) converter has been found to have extensive applications in renewable energy, industrial fields, and others. The high efficiency requirement is crucial to operating a PWM rectifier in various applications, in addition to the fundamental control objectives of sinusoidal grid currents and the correct DC bus voltage. Additionally, in practical application, another issue arises when the grid voltage frequently experiences distortion, leading to a distorted grid current and a significant rise in total harmonic distortion (THD). To resolve these problems, a model predictive virtual flux-based direct power control (MPVFDPC) with improved power loss performance is proposed based on an integrated switching state predetermination strategy. The proposed MPVFDPC for PWM rectifier inherits the merits of both virtual flux control and direct power control, which have fast dynamic performance and the grid current THD is considerably decreased under distorted grid voltage states. The proposed technique aims to minimize switching loss under ideal and distorted grid voltage states by exploiting the discontinuous modulation concept by using a switching state predetermination strategy. The MPVFDPC with switching state predetermination strategy is proven by employing it in experiments as well as simulations in comparison with previous models: predictive direct power control (Conv. MPDPC) and conventional MPVFDPC (Conv. MPVFDPC). The acquired waveforms and quantitative data are employed to prove the effectiveness of the developed algorithm.

show abstract

Section: Introductionmentioning

confidence: 99%

High-Efficient Direct Power Control Scheme Using Predictive Virtual Flux for Three-Phase Active Rectifiers

Nguyen,

Kwak,

Choi

2024

Machines

View full text Add to dashboard Cite

show abstract

“…Recent developments of FCS-MPC in AFE rectifiers include improving its switching frequency behavior [5], [13], [17], current quality [5], and the study of the system operation under unbalanced/distorted grid voltages [18], [19]. In these last two works, even sensorless operation, which do not require grid voltage sensors, has been considered.…”

Section: Introductionmentioning

confidence: 99%

“…A grid voltage sensorless model predictive power controller with two-vector duty cycle optimization is proposed in [18], where system operation under unbalanced and distorted grid conditions is explicitly considered. Another sensorless approach is proposed in [19], where this time a neural network estimator is used, and the gating signals are generated by a space vector modulator.…”

Section: Introductionmentioning

confidence: 99%

A Predictive Shortest-Horizon Voltage Control Algorithm for Non-Minimum Phase Three-Phase Rectifiers

et al. 2022

View full text Add to dashboard Cite

Three-phase active front end rectifiers are a widely used power topology in applications such as renewable energy interfaces and motor drives, among many others. Its control is usually performed by a cascade combination of linear controllers which must be properly tuned for correct operation, and which depend on the operating point and system parameters. These family of controllers place inherent limits on the system dynamic response. On the other hand, the predictive control approach has been proposed as an alternative technique for these converters due to its fast dynamic response, simple concept, flexibility, multiple objective capability, among other desirable properties. In the case of power converter applications, short prediction horizons are usually used due to computational limitations. However, when short horizons are considered, the non-minimum phase characteristic of the rectifier voltage response can introduce stability issues, as its direct inversion is not possible without jeopardizing it. Indeed, this may lead to voltage regulation loss, and in the worst case, overcurrents that could damage the converter. To overcome such problem, this paper proposes a new concept for a predictive horizon one voltage controller for gridconnected three-phase active front end rectifiers. The proposal is based on the minimum and non-minimum phase plant factorization concept and the use of different sampling periods, to prevent the direct inversion of the non-minimum phase voltage dynamic. Simulated and experimental results are included and show its correct operation, even with a horizon one predictive voltage controller, thus ensuring the fastest response of the system for a given sampling time.INDEX TERMS Active front end rectifier, model predictive control, non-minimum phase, voltage control.

show abstract

“…Moreover, the voltage sensorless method of converter can also be adopted as a complementary strategy when the sensors encounter faults [25]. The emphasis of grid voltage sensorless control relies on the accurate and fast estimation of fundamental grid voltage or VF, which can replace the grid voltage sensor [26]. However, the existing sensorless control methods have drawbacks, as follows.…”

Section: Introductionmentioning

confidence: 99%

Voltage-Sensorless Natural Frame Control for Single-Phase CHB Converter under Distorted Grid Conditions

et al. 2022

View full text Add to dashboard Cite

In this paper, a control scheme combining grid voltage sensorless control and natural frame control (NFC) has been proposed for single-phase cascaded H-bridge converter (CHB) under distorted grid conditions. Firstly, the virtual flux (VF) signal is estimated by a modified virtual flux estimator (VFE). Then the VF-based NFC is derived, using the estimated sinusoidal VF signal to generate the unit vectors for synchronization, which enables the omitting of the coordinate transformation, current quadrature signal generation, and phase-locked loop (PLL). Aiming at the problem that grid harmonic interference is not well considered in the conventional NFC and conventional voltage sensorless control, a current controller with enhanced harmonic-rejection ability is proposed in this paper. As a result, better steady-state performance and rapid transient response are achieved. The effectiveness of the proposed method has been verified on a prototype of the single-phase 3-cell CHB converter.

show abstract

Virtual Flux Estimation for Sensorless Predictive Control of PWM Rectifiers Under Unbalanced and Distorted Grid Conditions

Cited by 31 publications

References 37 publications

High-Efficient Direct Power Control Scheme Using Predictive Virtual Flux for Three-Phase Active Rectifiers

High-Efficient Direct Power Control Scheme Using Predictive Virtual Flux for Three-Phase Active Rectifiers

A Predictive Shortest-Horizon Voltage Control Algorithm for Non-Minimum Phase Three-Phase Rectifiers

Voltage-Sensorless Natural Frame Control for Single-Phase CHB Converter under Distorted Grid Conditions

Contact Info

Product

Resources

About