Resolving Sub-Cycle Overvoltage Issue in Solar and Type-4 Wind Farms Employing Low Voltage Ride Through

Over the past few years, transmission grid in the USA has seen numerous unintentional tripping events of large-scale inverter based resources (IBRs). These trippings were primarily caused by non-standard settings and certain fault ride through controls implemented in the inverters, resulting in ...

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Bibliographic Details
Published in:IEEE access 2024, Vol.12, p.175627-175639
Main Authors: Hossain, Shah Mohazzem, Patel, Trupal, Brahma, Sukumar
Format: Article
Language:English
Subjects:
Capacitors
Inverter
Inverter-based resource
Inverters
Low voltage
Mathematical analysis
Overvoltage
Power harmonic filters
power system disturbance
power system protection
Reactive power
Real time
solar farm
Solar oscillations
Solar power generation
Surges
Transient analysis
Upgrading
Voltage control
Waveforms
wind farm
Wind farms
Wind power
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Summary:Over the past few years, transmission grid in the USA has seen numerous unintentional tripping events of large-scale inverter based resources (IBRs). These trippings were primarily caused by non-standard settings and certain fault ride through controls implemented in the inverters, resulting in 'subcycle overvoltage' at the inverter terminals while recovering from a fault event. This paper first recreates the sub-cycle overvoltage scenario using a validated scaled farm model based on a real-world renewable farm. Using the simulation results and physics-based hypotheses, it identifies the root cause of the problem. Then, from mathematical analysis of the post-fault waveforms it proposes a control-based solution to comprehensively resolve this overvoltage issue in solar farms and in Type-4 wind farms. The solution logic is successfully implemented on a real-time platform. The solution, which is triggered by the dominant oscillation frequency in the post-fault voltage waveforms, and regulates the reactive power to successfully counter the rise of subcycle overvoltage, requires no hardware modifications, and can be implemented as a firmware upgrade in existing inverter controllers that are susceptible to the overvoltage-induced trippings.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2024.3504547