Global Wind Power Installations

Ackermann, Thomas; Kuwahata, Rena

doi:10.1007/978-1-4614-5820-3_76

Cited by 1 publication

(6 citation statements)

References 2 publications

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“…[3], [27], the TI phenomena may be of concern in these cases. However, lightlydamped torsional modes in wind turbines are generally at low frequencies, which should not be a problem because high series compensation levels are required to reach these mechanical resonance modes [2], [11], [13], [25].…”

Section: A Sub-synchronous Resonancementioning

confidence: 99%

“…SSTI defines the problem of a turbine-generator near a power electronic controller when the mechanical system resonates with the negative damping of the controller at sub-synchronous frequencies [6], [25]. Power electronic controllers (such as those in HVDC links, FACTS, and any control device that responds rapidly to power variations in the sub-synchronous frequency range) can exhibit negative damping at sub-synchronous frequencies, which can cause undamped oscillations in the fixed mechanical torsional modes of drive-train systems [23], [30].…”

Section: B Sub-synchronous Torsional Interactionmentioning

confidence: 99%

“…SSCI is an interaction between a power electronic control system and a series-compensated electrical network [6], [25]. The SSCI is not related to the mechanical shaft system, and neither TI nor SSTI phenomena are involved, so the resonance frequency is not fixed, changing under different system conditions and converter control algorithms [9].…”

Section: Sub-synchronous Control Interactionmentioning

confidence: 99%

“…The SSCI is not related to the mechanical shaft system, and neither TI nor SSTI phenomena are involved, so the resonance frequency is not fixed, changing under different system conditions and converter control algorithms [9]. If protective measures are not considered, SSCI oscillations can build-up quickly, compared with mechanical interactions, because they are a purely control/electrical phenomenon [23], [25], [30].…”

Section: Sub-synchronous Control Interactionmentioning

confidence: 99%

“…Formally, SSI is a general term that defines two power system elements exchanging energy with each other at one or more of the natural frequencies of the combined system below the synchronous frequency [6]. According to the different elements involved (e.g., series capacitor, generator, mechanical system, power electronic control), the SSI can be classified into [6], [23]- [25]: sub-synchronous resonance (SSR), sub-synchronous torsional interaction (SSTI) and sub-synchronous control interaction (SSCI). Fig.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Sub-Synchronous Interaction Damping Control for DFIG Wind Turbines

León

Solsona

2015

IEEE Trans. Power Syst.

273

141

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This paper presents a damping control to mitigate sub-synchronous interactions (SSI) in doubly-fed induction generator (DFIG) wind turbines connected to series-compensated lines. This issue has gained attention due to the recent SSI phenomena reported in DFIG wind farms located near series capacitors. Two approaches which add a supplementary damping control signal are compared: one of them, integrated to the grid-side converter, and the other one, to the rotor-side converter. The SSI damping controls are designed using a multi-input multi-output state-space methodology. This allows to easily tune a high performance controller using several measurements and control inputs. Smalland large-signal stability analyses, robustness aspects, impact of the supplementary controls on the system modes, and influence of different operating conditions on the SSI are also discussed. The obtained results show that the supplementary control is able to properly damp the sub-synchronous oscillations of DFIG wind turbines by updating the existing DFIG control systems without the inclusion of expensive additional damping devices, and reducing the risk of wind generation tripping.

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