Parallel Inverters Control in Standalone Microgrid using different Droop Control Methodologies and Virtual Oscillator Control

Gurugubelli, Vikash; Ghosh, Arnab

doi:10.1007/s40031-021-00613-6

Cited by 12 publications

(2 citation statements)

References 9 publications

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“…Reference [14]- [15] applied of virtual impedance method to shape the output impedance of PV inverter grid-connected inverters. Reference [16]- [17] proposes to add a filter to the controller so that only the impedance characteristics of the gridtied inverter at the resonant frequency are changed.…”

Section: Wide Frequency Band Oscillation Suppressionmentioning

confidence: 99%

Wide frequency band oscillation mechanism and suppression measures for grid-interfaced PV inverters based on impedance analysis

Zhao,

Chen,

et al. 2023

J. Phys.: Conf. Ser.

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With the rapid development of PV and wind power, the energy structure of the power grid is changing dramatically. The dominant power supply role played by conventional power sources such as hydropower and thermal power is gradually replaced by PV and wind power. All the power electronics-based equipment makes the power system stable form more complex, and one of the most significant challenges is wide frequency band oscillation (WFBO). This paper proposes an impedance analysis method for PV inverters in high proportion to new energy-integrated power systems. First, we investigate WFBO mechanism caused by the PV inverter based on its impedance model, and then a detailed impedance model of parallel PV inverters is developed to study WFBOs in PV stations. Finally, the WFBO suppression measure based on active damping control is proposed. Simulation results prove the correctness and feasibility of the active damping control strategy.

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Section: Wide Frequency Band Oscillation Suppressionmentioning

confidence: 99%

Wide frequency band oscillation mechanism and suppression measures for grid-interfaced PV inverters based on impedance analysis

Zhao,

Chen,

et al. 2023

J. Phys.: Conf. Ser.

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“…On the one hand, the parallel generators can increase power generation, optimize efficiency of generators by running in the optimal 70-75% of rated power and ensure the continuity of power conversion during faults in generators or maintenance [28][29][30]. On the other hand, the parallel power converter can improves the power factor in AC/DC converter and the quality of sine-wave in DC/AC converter, also ensure the continuity of system during faults in power converter [31][32][33]. In fact, the effectiveness of an isolated water pumping system is not related to the structure of powertrains system but also to the control of wind turbine water pumping system.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear optimal control with effective wind speed estimation for maximum power extraction based on adaptive fuzzy logic controller and extended Kalman Filter

Benmahdjoub

Mezouar

Ibrahim

et al. 2023

Int. J. Dynam. Control

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The present paper aims to improve the effectiveness of an isolated water pumping system based on parallel wind turbine powertrains by using a nonlinear Integral Backstepping Controller (IBSC). In fact, the powertrain system with parallel Permanent Magnet Synchronous Generators (PMSG) is used to ensure the continuity of the power conversion system and to optimize the efficiency of generators. A three-phase PWM rectifier is implemented in the power system to convert the AC voltage obtained from parallel PMSG generators to a DC voltage. In fact, the regulated DC voltage will be supplied to a DC motor-driven water pump to control the tank level in the wind turbine pumping system. In this paper, the effective wind speed of a wind turbine is estimated by using an Extended Kalman Filter (EKF) instead of using anemometers. In addition, the Tip Tip Speed Ratio (TSR) method based on an Adaptive Fuzzy Logic Controller (AFLC) is performed to apply the Maximum Power Point Tracking (MPPT) algorithm for maximum power extraction from the available energy in the wind. Moreover, the Voltage Oriented Control (VOC) strategy is handled to control the currents of the three-phase rectifier. To evaluate the efficiency of the EKF estimator, the covariance and correlation coefficient between the estimated and measured wind speed are computed for each s 1 , while the AFLC and nonlinear IBSC controllers are evaluated by comparing their results with those obtained by the PI controller. For the wind speed estimation, the covariance and correlation coefficient results demonstrate that the EKF estimator has high accuracy with a 98% similarity between the estimated and measured wind speed. For the power extraction, the TSR based on adaptive FLC controller can extract slightly more wind energy than the PI controller. For tank level control, the nonlinear IBSC controller improves the efficiency of the wind turbine water pumping system by reducing the DC voltage surge and the overshoot of water level obtained by PI controller.

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Different Oscillator-Controlled Parallel Three-Phase Inverters in Stand-Alone Microgrid

Gurugubelli

Ghosh

Panda

2022

Advances in Sustainability Science and Technology

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Parallel Inverters Control in Standalone Microgrid using different Droop Control Methodologies and Virtual Oscillator Control

Cited by 12 publications

References 9 publications

Wide frequency band oscillation mechanism and suppression measures for grid-interfaced PV inverters based on impedance analysis

Wide frequency band oscillation mechanism and suppression measures for grid-interfaced PV inverters based on impedance analysis

Nonlinear optimal control with effective wind speed estimation for maximum power extraction based on adaptive fuzzy logic controller and extended Kalman Filter

Different Oscillator-Controlled Parallel Three-Phase Inverters in Stand-Alone Microgrid

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