Voltage Unbalance Compensation using Novel Virtual Impedance Loop

In microgrids Voltage Source Inverters are generally used for integration of distributed energy generation resources to supply the load demand. Microgrids have the capability to meet the power demand of local loads even if the main grid fails. Under this condition voltage and frequency support from...

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Bibliographic Details
Published inJournal of Electrical Systems Vol. 15; no. 1; pp. 96 - 108
Main Authors Saroha, Jaipal, Singh, M, Jain, D K
Format Journal Article
LanguageEnglish
Published Paris Engineering and Scientific Research Groups 01.03.2019
Subjects
Distributed generation
Electric industries
Electric potential
Electric power grids
Electrical equipment
Electrical loads
Harmonic distortion
High impedance
Rectifiers
Unbalance
Voltage
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Summary:In microgrids Voltage Source Inverters are generally used for integration of distributed energy generation resources to supply the load demand. Microgrids have the capability to meet the power demand of local loads even if the main grid fails. Under this condition voltage and frequency support from the main grid is not available, so it is the responsibility of VSIs to keep voltage and frequency of the microgrid within limits. Loads such as three phase unbalance load, single phase high impedance faults, or nonlinear loads (rectifier, ASD, VFD etc) may cause severe voltage unbalance and harmonic distortion. Voltage unbalance in an islanded microgrid is mitigated by implementing a novel virtual impedance loop. The proposed control strategy is based on Synchronous Reference Frame (SRF) theory. The proposed microgrid is simulated in MATLAB/Simulink SimPower System tool box
ISSN:1112-5209