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Immitance based stability assessment for multi paralleled 3-ø pv inverters connected to grid


Affiliations
1 Associate Professore, Electrical and Electronic Department, VIIT, Vishakhapatanam, India
2 Professor, Elctrical and Electronic Department,GRIET,Hyderabad, India
     

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The main objective of this work is to analyze and investigation on Immitance Based Stability Assessment for Multi paralleled 3-Ø PV Inverters connected to Grid is checked by using the Impedance based Stability Criterion (IBSC), The causes for Harmonically stabilized/destabilize the Multi paralleled PV inverter Connected to the grid by varying grid impedance is Analysed by the impedance-based stability criterion.Here Two case studies are Considered with the different grid Inductances to demonstrate the overall system is stable/unstable. The Third case study is projects the overall stability of the System with the constant grid impedance and variable Load Impedance/ Admittance. The Overall System is stable up to grid Inductance 5 mH even though there is change in Load Admittance The stability of the system depending on the grid impedance and not depending on the Load Admittance. The Harmonic content in the grid current of the stable system is in the acceptable limit. It is verified in the Time domain Simulation is provided in MATLAB- SimulinkTM.

Keywords

PV Array, Maximum Power Point Tracking (MPPT), Proportional, Resonant Current Controller, Inverter output impedance, Impedance Based Stability Criterion(IBSC)
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  • Immitance based stability assessment for multi paralleled 3-ø pv inverters connected to grid

Abstract Views: 195  |  PDF Views: 0

Authors

R. S. Ravi Sankar
Associate Professore, Electrical and Electronic Department, VIIT, Vishakhapatanam, India
S. V. Jayaram Kumar
Professor, Elctrical and Electronic Department,GRIET,Hyderabad, India

Abstract


The main objective of this work is to analyze and investigation on Immitance Based Stability Assessment for Multi paralleled 3-Ø PV Inverters connected to Grid is checked by using the Impedance based Stability Criterion (IBSC), The causes for Harmonically stabilized/destabilize the Multi paralleled PV inverter Connected to the grid by varying grid impedance is Analysed by the impedance-based stability criterion.Here Two case studies are Considered with the different grid Inductances to demonstrate the overall system is stable/unstable. The Third case study is projects the overall stability of the System with the constant grid impedance and variable Load Impedance/ Admittance. The Overall System is stable up to grid Inductance 5 mH even though there is change in Load Admittance The stability of the system depending on the grid impedance and not depending on the Load Admittance. The Harmonic content in the grid current of the stable system is in the acceptable limit. It is verified in the Time domain Simulation is provided in MATLAB- SimulinkTM.

Keywords


PV Array, Maximum Power Point Tracking (MPPT), Proportional, Resonant Current Controller, Inverter output impedance, Impedance Based Stability Criterion(IBSC)



DOI: https://doi.org/10.33686/prj.v13i2.189261