Voltage sensorless improved model predictive direct power control for three-phase grid-connected converters

Bozorgi, Amir Masoud; Gholami-Khesht, Hosein; Farasat, Mehdi; Mehraeen, Shahab; Monfared, Mohammad

doi:10.1109/ecce.2017.8096839

“…Here, all the voltages and currents are dc quantities in steady state. Hence, last terms in (12) and (13) are zero except during transients. These transients exist for too low a duration for the PLL to respond.…”

Section: B Voltage Controller Designmentioning

confidence: 99%

“…The derivative terms in (12) and (13) can be safely neglected as the bandwidth of PLL is around one order lower than that of current control loop. For the purpose of calculating θ, v sd as obtained from (15) can be directly fed to the PI controller of PLL, as shown in Fig.…”

Section: B Voltage Controller Designmentioning

confidence: 99%

Simplified Input Voltage Sensorless Vector Control for PWM Rectifiers

Upamanyu

¹

,

Ameta

²

,

Narayanan

³

2018

2018 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)

2

0

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Input voltage information is essential for vector control of three-phase active pulse-width modulated (PWM) rectifier. Input voltage sensors impact cost, size and reliability of the PWM rectifier. Existing input voltage sensorless methods either involve extensive mathematical computations to estimate the input voltage or have a control structure significantly different from that of conventional vector control. This work proposes an input voltage sensorless control of PWM rectifier which retains the simplicity of vector control and also reduces the computation requirement. Modelling and analysis of the rectifier system with the proposed phase locked loop (PLL) are presented. The design procedure for the PLL is detailed, and is validated through frequency domain studies. Performance of the proposed method is compared with that of conventional sensor based vector control through simulations and experiments. The responses of both are found to be almost indistinguishable while the proposed method is shown to require reduced computational effort.

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“…The phase-delay and attenuation of the signals caused by these LPFs need suitable compensation [6]. Also methods such as adaptive neural estimator [10] and model predictive based control [11], [12] introduce additional complexity to the design of the control.…”

Section: Introductionmentioning

confidence: 99%

“…The existing input voltage sensorless methods require higher computation effort, more complex control structure and/or additional controllers to be designed/tuned than the conventional sensor-based methods [2]- [12]. This paper proposes a simplified sensorless control method which has a computational requirement even lower than that of the conventional sensor-based method, while providing a comparable dynamic performance.…”

Section: Introductionmentioning

confidence: 99%

Simplified Input Voltage Sensorless Vector Control for PWM Rectifiers

Upamanyu

¹

,

Ameta²,

Narayanan

³

2020

IEEE Trans. on Ind. Applicat.

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Input voltage information is essential for vector control of three-phase active pulse-width modulated (PWM) rectifier. Input voltage sensors impact cost, size and reliability of the PWM rectifier. Existing input voltage sensorless methods either involve extensive mathematical computations to estimate the input voltage or have a control structure significantly different from that of conventional vector control. This work proposes an input voltage sensorless control of PWM rectifier which retains the simplicity of vector control and also reduces the computation requirement. Modelling and analysis of the rectifier system with the proposed phase locked loop (PLL) are presented. The design procedure for the PLL is detailed, and is validated through frequency domain studies. Performance of the proposed method is compared with that of conventional sensor based vector control through simulations and experiments. The responses of both are found to be almost indistinguishable while the proposed method is shown to require reduced computational effort.

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“…Recently, the model predictive power control (MPPC) has been developed as a powerful alternative with accurate voltage vector selection [5], [6]. In MPPC, active power and reactive power are regulated by selecting a voltage vector that minimizes the cost function consisting of power errors between references and predicted ones.…”

Section: Introductionmentioning

confidence: 99%

Multivector Model Predictive Power Control of Three-Phase Rectifiers With Reduced Power Ripples Under Nonideal Grid Conditions

Zhou

¹

,

Tu

²

,

Tang

³

2018

IEEE Trans. Ind. Electron.

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Model predictive power control (MPPC) is a promising control scheme for bidirectional AC/DC rectifiers. However, the control performance of conventional MPPC deteriorates under nonideal grid conditions. Furthermore, the one-switching-vector-per-control-interval characteristic of conventional MPPC leads to high ripples of control variables. To improve the steady-state performance of rectifiers under nonideal grid voltage conditions, a multivector model predictive power control (MV-MPPC) scheme is proposed. The proposed method presents a constantswitching-frequency and better steady-state control performance without increasing its sampling frequency. By selecting two active vectors and one zero vector, the range of optimal vector for active and reactive power regulation can be extended from fixed phase and magnitude to arbitrary phase and magnitude. Incorporated with a second-order generalized integrator (SOGI) for obtaining the quadrature component of grid voltage, the proposed method is applicable to the grid conditions where low-order harmonics exist. The preliminary calculation is adopted to avoid repetitive computation of the predicted values in the implementation of MV-MPPC, which reduces the calculation burden of the proposed scheme. A thorough experimental evaluation of the proposed scheme with the conventional MPPC (C-MPPC) and duty-optimal MPPC (DO-MPPC) has been conducted to validate the superiority of the proposed MV-MPPC solution.

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Voltage sensorless improved model predictive direct power control for three-phase grid-connected converters

Cited by 8 publications

References 18 publications

Simplified Input Voltage Sensorless Vector Control for PWM Rectifiers

Simplified Input Voltage Sensorless Vector Control for PWM Rectifiers

Simplified Input Voltage Sensorless Vector Control for PWM Rectifiers

Multivector Model Predictive Power Control of Three-Phase Rectifiers With Reduced Power Ripples Under Nonideal Grid Conditions

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