HVDC Dynamic modelling for small signal analysis

Yang, Xinghua; Chen, C.

doi:10.1049/ip-gtd:20040798

Cited by 25 publications

(9 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It has been observed that additional spectral components can be generated by the HVDC converter due to the transfer characteristics of the HVDC system valves, [1,[11][12][13]. Similar phenomenon can be found using the EMTDC/PSCAD simulations.…”

Section: The Modulation Theorysupporting

confidence: 59%

Transfer characteristics of thyristor-based HVDC convertor in subsynchronous and low frequency band

Zhou

Zhang

Wan

2012

Int. Trans. Electr. Energ. Syst.

View full text Add to dashboard Cite

SUMMARY The EMTDC/PSCAD simulation can be used to study the closed‐loop transfer characteristics of HVDC system, but it is very difficult to understand analytically the transfer characteristics of each system element, i.e. transfer characteristics of valves of HVDC system. Thus, the model based on the modulation theory has been widely used to describe the open‐loop valves transfer characteristics of thyristor‐based convertors. However, it is found that there is discrepancy between the EMDC/PSCAD simulations and the open‐loop valves transfer model based on the modulation theory in subsynchronous oscillation analysis. It is further revealed that when employing the model based on the modulation theory, the assumption that the valves conduct at equal time intervals is no longer true in low and subsynchronous frequency band. Hence, in this paper, a new model is proposed to describe the valves transfer characteristics of the thyristor‐based HVDC convertor, which helps understand the behavior of valves conducting at unequal time intervals. An EMTDC/PSCAD‐based simulation system is employed to verify the new model and compare the results of the new model with that of the model based on the modulation theory in the low and subsynchronous frequency band. The new model is useful to understand how the additional spectral components are generated by the HVDC system considering the transfer characteristics of the converter in low and subsynchronous frequency band. Copyright © 2012 John Wiley & Sons, Ltd.

show abstract

Section: The Modulation Theorysupporting

confidence: 59%

Transfer characteristics of thyristor-based HVDC convertor in subsynchronous and low frequency band

Zhou

Zhang

Wan

2012

Int. Trans. Electr. Energ. Syst.

View full text Add to dashboard Cite

show abstract

“…As described before, the AC/DC power conversion stage consists of two LCRs which operate In [32], the small-signal model of a 6-pulse H-Bridge rectifier is presented. The same approach is extended to develop the small-signal model of the AC/DC power conversion stage of the TVFD.…”

Section: Small-signal Model Of the Ac/dc Power Conversion Stagementioning

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

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.

show abstract

“…(17) ΔIdcr can then be expressed as (18) Using (15)- (18), (2) and (3) can then be expressed as (19) (20)…”

Section: A Equations For State Space Model Of Lcc Hvdc Systemmentioning

confidence: 99%

“…Using these techniques, state space models of an LCC HVDC system were developed to analyze the interaction between multi-infeed LCC HVDC systems and a wind farm in a weak power network [16], [17]. In [18], a small-signal dynamic model of an LCC HVDC system was developed in a synchronous rotating d-q reference frame by means of the sampled-data modeling approach. In [19] This article has been accepted for publication in a future issue of this journal, but has not been fully edited.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Analysis of an LCC HVDC System Using DC Voltage Control to Improve Transient Response and Short-Term Power Transfer Capability

Kwon

Kim

Moon

2018

IEEE Trans. Power Delivery

View full text Add to dashboard Cite

HVDC Dynamic modelling for small signal analysis

Cited by 25 publications

References 9 publications

Transfer characteristics of thyristor-based HVDC convertor in subsynchronous and low frequency band

Transfer characteristics of thyristor-based HVDC convertor in subsynchronous and low frequency band

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

Modeling and Analysis of an LCC HVDC System Using DC Voltage Control to Improve Transient Response and Short-Term Power Transfer Capability

Contact Info

Product

Resources

About