VCO‐less PLL control‐based voltage‐source converter for power quality improvement in distributed generation system

Giri, Ashutosh; Arya, Sabha Raj; Maurya, Rakesh; Babu, B. Chitti

doi:10.1049/iet-epa.2018.5827

Cited by 19 publications

(13 citation statements)

References 28 publications

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“…Furthermore, the PLL was also utilized for grid synchronization, and for controlling and estimating state variables. PLL-based synchronization techniques are the most conventional and widely accepted [28,29]. Hence, RT-PLL was implemented on an FPGA to estimate the grid frequency and angle of three-phase grid voltages.…”

Section: Phase Lock Loop (Pll)mentioning

confidence: 99%

Design and Real-Time Implementation of a Control System for SiC Off-Board Chargers of Battery Electric Buses

et al. 2022

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Emerging wide bandgap (WBG) semiconductors, such as silicon carbide (SiC), will enable chargers to operate at higher switching frequencies, which grants the ability to deliver high power and enhances efficiency. This paper addresses the modeling of a double-sided cooling (DSC) SiC technology-based off-board charger for battery electric buses (BEBs) and the design of its control and real-time (RT) implementation. A three-phase active front-end (AFE) rectifier topology is considered in the modeling and control system design for the active part of the DC off-board charger. The control system consists of a dual-loop voltage–current controller and is used to ensure AC to DC power conversion for charging and to achieve the targeted grid current total harmonic distortion (THD) and unity power factor (PF). Linear and nonlinear simulation models are developed in MATLAB/Simulink for optimum control design and to validate the voltage and current control performances. Four types of controllers (i.e., proportional–integral (PI), lead–lag, proportional–resonant (PR), and modified proportional–resonant (MPR)) are designed as current controllers, and a comparative analysis is conducted on the simulation model. In addition, the final design of the dual-loop controller is implemented on the RT–FPGA platform of dSpace MicroLabBox. It is then tested with the charger to validate the control performance with experimental data. The simulation and experimental results demonstrate the correct operation of the converter control performance by tracking the reference commands.

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Section: Phase Lock Loop (Pll)mentioning

confidence: 99%

Design and Real-Time Implementation of a Control System for SiC Off-Board Chargers of Battery Electric Buses

et al. 2022

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“…In [12], a comprehensive review is carried out to recognize the sources of harmonics and to come up with some cost-effective retrofit solutions for improving the power quality. In [13][14][15], there are a large number of control algorithms which have been reported for power quality improvement in distributed PV power systems. Here, the two-stage grid supportive PV system provides ancillary services such as compensation of non-active power, load balancing and reduction in harmonics under low generation or outage of solar power (particularly in night time, overcast and rainy weather) it functions as a compensator unit.…”

Section: Introductionmentioning

confidence: 99%

Sparse quaternion‐valued minimization based technique with pre‐predictive PV control loop of distributed PV power generation system

Kumar

Debouza

Al‐Durra

et al. 2021

IET Power Electronics

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This paper presents a sparse quaternion-valued minimization (SQVM) based control technique of a two-stage grid supportive photovoltaic (PV) power system with power conditioning capabilities. The grid side converter (GSC) is controlled by utilizing an SQVM control technique. The proposed algorithm enables the GSC to mitigate the load harmonics current and provides reactive power compensation at the point of common coupling (PCC). The proposed control is tuned to mitigate the DC offset error, harmonics current and to improve the frequency response of the proposed system. A DC link pre-predictive is incorporated to improve the dynamic response by reducing the burden on the outer Proportional-Integral (PI) voltage controller loop. Further, it is used to extract the fundamental component of load currents for generating the reference currents. An adjustable DC link voltage loop is incorporated in the proposed control technique to adapt the PCC voltage variation, which helps in minimizing the losses of the PV system. For real-time execution of the adjustable DC link voltage concept, the DC link voltage is adapted with a variation in the PCC voltage. The operation and control of the system topology are validated experimentally under various scenarios.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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“…In the conventional control strategy of the wind power converter, the current control mode based on phase-locked loop (PLL) synchronisation is adopted, which externally shows the characteristics of a low-inertia current source [8,9]. When the grid becomes weaker, the dynamic characteristics of PLL and the current loop will deteriorate the control performance of the system and make the system become unstable [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Improved active power dynamic response of voltage‐controlled doubly fed induction generator

Xie

Gao

et al. 2021

IET Electric Power Appl

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The voltage-controlled doubly fed induction generator (VC-DFIG) is widely studied because of its self-synchronous control characteristics and its ability to actively support the grid voltage and frequency. However, the VC-DFIG is a multi-loop and cascadecontrolled system, and the bandwidth design of each control loop is difficult. When the power instruction and grid frequency disturbances occur, the improper bandwidth designs will cause severe oscillation and overshoot. In this study, the Thevenin equivalent voltage model of DFIG is derived, combined with the characteristics of voltage control, and the control structure of VC-DFIG is constructed. On this basis, a small signal model of active power dynamic response is established, which includes the characteristics of the voltage control loop and active power loop. For the parameter robustness and dynamic response of VC-DFIG, the frequency damping control strategy and the lead-lag correction control strategy are proposed. Finally, the enhanced VC-DFIG technology was realised through the 2.0 MW DFIG experimental platform, and the effectiveness of the two proposed control strategies were verified.

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VCO‐less PLL control‐based voltage‐source converter for power quality improvement in distributed generation system

Cited by 19 publications

References 28 publications

Design and Real-Time Implementation of a Control System for SiC Off-Board Chargers of Battery Electric Buses

Design and Real-Time Implementation of a Control System for SiC Off-Board Chargers of Battery Electric Buses

Sparse quaternion‐valued minimization based technique with pre‐predictive PV control loop of distributed PV power generation system

Improved active power dynamic response of voltage‐controlled doubly fed induction generator

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