Abstract
Voltage sags initiated by utility transmission system faults causes nuisance trips of low voltage (LV) motors due to contactors dropping off as a result of the under voltage condition. Since voltage disturbances by utility system cannot be prevented, it is essential to mitigate the impact of LV motors trips on critical process systems in the oil and gas industry such as lubrication and shaft-sealing systems. To address this challenge, several ride-through solutions were evaluated in terms of impact on motor performance and motor controller design. A simulation model was developed using PSCAD software to assess motor performance and subsequent current and torque profiles, associated with various ride-through solutions. The reliability and safety aspects of modifications associated with different ride-through solutions were evaluated, as well as, benchmarked with relevant international standards and industrial practices.
Published Version
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