Short circuit currents of DFIG based wind turbines

Bhatia, Rahul; Bahirat, Himanshu J.

doi:10.1109/icpes.2016.7584193

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…The increase in size of DFIG also may cause the DC component of short circuit current to persist for longer duration [7]. According to the calculation, the steady values of the short circuit current from wind farm varies from about 0 -5 kA.…”

Section: Comparison Of Resultsmentioning

confidence: 99%

Study on Short Circuit Current Calculation of Power System with UHVDC and New Energy Source

Li¹,

Yan²,

Song³

et al. 2017

EPE

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With the development of power system, the level of short circuit current will increase accordingly. In general, the influence of the HVDC system and the new energy source is not considered in the calculation of the short circuit current. For the power grid that short circuit current level closes to the interrupting capacity of circuit breaker, it's necessary to fully consider all kinds of influence factors, careful checking, so as to obtain more accurate calculation results of short circuit current. In 2018, two ±800 kV high-power Ultra High Voltage Direct Current (UHVDC) transmission projects will be connected with Shaanxi power grid, accompanied by a lot of concomitant fossil-fuel generating plants as power resource, and also a large number of new energy source, includes wind power generation and photovoltaic power generation. Around one of the UHVDC converter stations, short circuit current may exceed the withstand limit of some certain circuit breakers. In order to get more accurate short circuit current calculation results, three measures are used: 1) contrastive calculation and analysis by algorithm based on schemes and algorithm based on power flow; 2) analysis the influence of UHVDC by electromagnetic transient and electromechanical transient hybrid simulation; 3) considered a detailed model of Doubly Fed Induction Generator (DFIG) with low voltage ride through characteristics. The calculation results shows that: in the typical operation mode of Shaanxi power grid of 2018, the original calculation results by conventional calculation method are coincident with the results by considering the influence of algorithms, UHVDC and DFIG in large, in which: the results of the algorithm based on power flow are smaller than that of the algorithm based on schemes about 2 -8 kA; the steady values of the short circuit current provided by UHVDC converterstation (includes rectifiers and smoothing capacitors) are about 0 -3 kA; the steady values of the 626short circuit current provided by DFIG are about 0 -5 kA. The calculation results can provide reference for the selection of the circuit breaker, and it can be verified by fault recording data in the future.

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Section: Comparison Of Resultsmentioning

confidence: 99%

Study on Short Circuit Current Calculation of Power System with UHVDC and New Energy Source

Li¹,

Yan²,

Song³

et al. 2017

EPE

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show abstract

“…For the engineering purpose, 16 derives a practical analytical expression of the short-circuit current. With the asymmetric fault, 17 analyzes the short-circuit current and proposes an analytical expression. With control to the RSC, 18 obtains the time-domain-based analytical expression of the post-fault stator/rotor current.…”

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confidence: 99%

Analytical expression of equivalent duration and sensitivity model of aperiodic component of post‐fault thermal effect of DFIG

Zhang

Hua

et al. 2021

Int Trans Electr Energ Syst

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The temperature rise caused by the close fault may damage the doubly-fed induction generator (DFIG) and other electrical equipments. The thermal effect will be quantified by the step-by-step integration, which however cannot differentiate the periodic and aperiodic components. In this paper, the thermal effect of the DFIG is described by 10 components. According to their attenuation of the components, the periodic and the aperiodic components of the thermal effect are determined. To facilitate calculation, the analytical expression of the equivalent duration of the aperiodic components is proposed. To quantify the contributing factors to the thermal effect, the sensitivity model of the equivalent duration to the relevant factors is proposed. The numerical results validate the accuracy of the proposed equivalent duration and sensitivity model of the aperiodic component with different wind speeds and fault severities. The research provides the practical tool for the security of the DFIG, and gives the basis of the future work of the thermal stability check of the wind farms.

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Short circuit currents of DFIG based wind turbines

Cited by 2 publications

References 11 publications

Study on Short Circuit Current Calculation of Power System with UHVDC and New Energy Source

Study on Short Circuit Current Calculation of Power System with UHVDC and New Energy Source

Analytical expression of equivalent duration and sensitivity model of aperiodic component of post‐fault thermal effect of DFIG

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