Protection for sub synchronous torsional interaction conditions using an industrial sub-harmonic relay

Perera, N.; Midence, R.; Liyanage, V.

doi:10.1109/cpre.2018.8349817

Cited by 2 publications

(1 citation statement)

References 5 publications

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“…Differently, numerous studies can be found on SSTI for High Voltage Direct Current (HVDC) applications [9][10][11][12][13]. In this context, SSTI is categorized as the evolution of the Sub-Synchronous Resonance (SSR) phenomenon [14][15][16][17][18]. In [19][20][21], the plant torsional stability in the presence of SSR phenomena is assessed by means of eigenvalues and eigenvectors.…”

Section: Introductionmentioning

confidence: 99%

Electrical Damping Assessment and Stability Considerations for a Highly Electrified Liquefied Natural Gas Plant

Bongini

Mastromauro

Sgro³

et al. 2020

Energies

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In recent years, the Oil & Gas industry has been subjected to a progressive electrification process aiming to comply with global environmental requirements on CO2 emissions reduction. High-power electric motors fed by Variable Frequency Drives (VFDs) have replaced gas turbines as drivers for gas compression applications. In Liquefied Natural Gas (LNG) plants, unexpected downturns could be experienced in case of high torsional vibrations of power generations units. These torsional vibrations derive from the interaction among turbine-generator (TG) units and VFDs and are known as Sub-Synchronous Torsional Interactions (SSTIs). SSTIs can lead to instability when the overall electromechanical system lacks sufficient damping. In this scenario, electrical damping assessment is fundamental in order to ensure stability and reliable operation of an LNG plant. Negative electrical damping is strictly related to the negative incremental resistance behavior of the power converters and it is influenced by the converter’s control system. In this paper, a real case study based on Thyristor Variable Frequency Drives (TVFDs) is considered. Ad hoc dynamic models of the power converters and of the TG unit are developed and combined in order to provide an accurate estimation of the electrical damping. It is demonstrated that the electrical damping is affected by variations of the main control system parameters and how the use of a simplified model instead of an ad hoc model can impact the stability evaluation.

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Section: Introductionmentioning

confidence: 99%

Electrical Damping Assessment and Stability Considerations for a Highly Electrified Liquefied Natural Gas Plant

Bongini

Mastromauro

Sgro³

et al. 2020

Energies

View full text Add to dashboard Cite

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Review of sub-synchronous interaction in wind integrated power systems: classification, challenges, and mitigation techniques

Verma

Kumar

Gupta

et al. 2023

Prot Control Mod Power Syst

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Emerging sub-synchronous interactions (SSI) in wind-integrated power systems have added intense attention after numerous incidents in the US and China due to the involvement of series compensated transmission lines and power electronics devices. SSI phenomenon occurs when two power system elements exchange energy below the synchronous frequency. SSI phenomenon related to wind power plants is one of the most significant challenges to maintaining stability, while SSI phenomenon in practical wind farms, which has been observed recently, has not yet been described on the source of conventional SSI literature. This paper first explains the traditional development of SSI and its classification as given by the IEEE, and then it proposes a classification of SSI according to the current research status, reviews several mitigation techniques and challenges, and discusses analysis techniques for SSI. The paper also describes the effect of the active damping controllers, control scheme parameters, degree of series compensation, and various techniques used in wind power plants (WPPs). In particular, a supplementary damping controller with converter controllers in Doubly Fed Induction Generator based WPPs is briefly pronounced. This paper provides a realistic viewpoint and a potential outlook for the readers to properly deal with SSI and its mitigation techniques, which can help power engineers for the planning, economical operation, and future expansion of sustainable development.

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Protection for sub synchronous torsional interaction conditions using an industrial sub-harmonic relay

Cited by 2 publications

References 5 publications

Electrical Damping Assessment and Stability Considerations for a Highly Electrified Liquefied Natural Gas Plant

Electrical Damping Assessment and Stability Considerations for a Highly Electrified Liquefied Natural Gas Plant

Review of sub-synchronous interaction in wind integrated power systems: classification, challenges, and mitigation techniques

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