Voltage Fed Control of Distributed Power Generation Inverters with Inherent Service to Grid Stability

In many countries the percentage of power electronic interfaced power sources (PEIPS), especially renewable energies like wind power and photovoltaic (PV), has increased significantly during the last decade.Retaining system stability with a declining number of conventional synchronous generators is...

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Bibliographic Details
Published in:Energies (Basel) 2020-05, Vol.13 (10), p.2579
Main Authors: Klaes, Norbert, Goldschmidt, Nico, Fortmann, Jens
Format: Article
Language:English
Subjects:
Controllers
distributed energy generation
Distributed generation
droop control
Electric potential
Electric power distribution
Electric power systems
fault ride through
Generators
Interface stability
Inverters
islanding
microgrid
Photovoltaics
Power plants
Power sources
Systems stability
Voltage
voltage fed control
Wind power
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Summary:In many countries the percentage of power electronic interfaced power sources (PEIPS), especially renewable energies like wind power and photovoltaic (PV), has increased significantly during the last decade.Retaining system stability with a declining number of conventional synchronous generators is a new challenge that starts to be addressed by Grid Operators. The existing control schemes used in distributed energy generation inverters generally do not provide significant services to grid stability. This paper focuses on a control scheme that is in many ways similar to the control of conventional power plants, but avoids a higher rating of the inverters which is often required by control approaches emulating the response of a synchronous generator. The control parameters of the proposed scheme are derived analytically and their main dependencies from major system parameters are discussed. An add-on to achieve fault ride through capability for both balanced and unbalanced faults for voltage controlled inverters is presented. Model validation results in a laboratory setup show very good correlation and have proven practicability of the theory as well as fault ride through and islanding capability.
ISSN:1996-1073
1996-1073
DOI:10.3390/en13102579