SSR Mitigation of Series-Compensated DFIG Wind Farms by a Nonlinear Damping Controller Using Partial Feedback Linearization

Chowdhury, M. A.; Shafiullah, GM

doi:10.1109/tpwrs.2017.2752805

Cited by 77 publications

(37 citation statements)

References 40 publications

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“…It is thus relevant to discuss whether parameter uncertainty can change the behavior of the system. Recent works, e.g., [6]- [8], show that line compensation leads to the IGE with DFIGs configurations. In particular in [7] the authors apply a frequency scanning for various line lengths and always find a resonance (or bifurcation) condition.…”

Section: Case Studymentioning

confidence: 99%

See 1 more Smart Citation

Simplified Model to Study the Induction Generator Effect of the Subsynchronous Resonance Phenomenon

Bizzarri

Brambilla

Milano

2018

IEEE Trans. Energy Convers.

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This letter presents a simple model of induction machines able to appraise the induction generator effect of the sub-synchronous resonance phenomenon. The proposed model is general and can be applied to induction machines utilized in wind power applications, such as doubly-fed induction generators. A rigorous stability analysis is carried out based on the proposed model. This analysis shows that the induction generator effect leads to a Neimark-Sacker bifurcation.

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Section: Case Studymentioning

confidence: 99%

“…This situation, however, has considerably changed in the last decade due to the increasing penetration of wind power plants based on doubly-fed induction machines. Recent works show that SSR can occur for compensated wind power plants [6] and that the IGE is actually a significant issue in real-world applications [7], [8].…”

Section: Introductionmentioning

confidence: 99%

Simplified Model to Study the Induction Generator Effect of the Subsynchronous Resonance Phenomenon

Bizzarri

Brambilla

Milano

2018

IEEE Trans. Energy Convers.

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show abstract

“…Different damping strategies to mitigate the SSR have been developed and can be generally divided into two types: (1) hardware‐based solutions, ie, auxiliary damping control schemes by using some FACTS devices and (2) software‐based solutions, ie, adding damping controller to grid side converter (GSC) or rotor side converter (RSC) of the DFIG system . Bongiorno et al proposed a damping method of the SSR using static synchronous series compensator.…”

Section: Introductionmentioning

confidence: 99%

“…Two degrees of freedom control strategy for SSR damping is proposed in Huang et al However, the additional damping control units in the RSC and GSC make the system more complex. Recently, a nonlinear damping controller is introduced in Chowdhury and Shafiullah to damp out SSR actively. Nevertheless, external disturbances and parameter uncertainties worsen damping performance.…”

Section: Introductionmentioning

confidence: 99%

Active damping of resonances in DFIG system with cascade converter under weak grid

Din

Zhang

et al. 2019

Int Trans Electr Energ Syst

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Summary The interaction of impedance between the doubly fed induction generator (DFIG) system and series‐compensated weak grid gives rise to an issue of subsynchronous resonance (SSR). Likewise, the high‐frequency resonance (HFR) occurs when a DFIG system is connected to parallel‐compensated weak grid. This paper proposes an improved method to mitigate the caused resonance. The improved method, based on impedance modeling, utilizes an additional cascaded converter (CC) at Y‐point of DFIG stator winding with virtual impedance implemented at the CC control unit, which reshapes the DFIG impedance for effective mitigation of both SSR and HFR. The virtual impedance is disabled when DFIG operated in series‐compensated weak grid, while enabled when working in parallel‐compensated weak grid, which effectively damps the HFR. A detailed theoretical explanation and impedance modeling of the CC has been given. The effectiveness of the proposed method has been validated through MATLAB simulations based on a 2‐MW DFIG system.

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“…The irregular phenomenon and uncertainty of wind and solar energy may cause undesired grid conditions [4]. Sub-and super-synchronous oscillations may emerge in wind farms if the controller is not well-designed [5]. In recent years, these issues happened several times in Oklahoma, USA [6] tripped off.…”

Section: Introductionmentioning

confidence: 99%

A Modified DSC-Based Grid Synchronization Method for a High Renewable Penetrated Power System Under Distorted Voltage Conditions

Yang

et al. 2019

Energies

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With the increasing penetration of renewable energy, a weak grid with declining inertia and distorted voltage conditions becomes a significant problem for wind and solar energy integration. Grid frequency is prone to deviate from its nominal value. Grid voltages become more easily polluted by unbalanced and harmonic components. Grid synchronization technique, as a significant method used in wind and solar energy grid-connected converters, can easily become ineffective. As probably the most widespread grid synchronization technique, phase-locked loop (PLL) is required to detect the grid frequency and phase rapidly and precisely even under such undesired conditions. While the amount of filtering techniques can remove disturbances, they also deteriorate the dynamic performance of PLL, which may not meet the standard requirements of grid codes. The objective of this paper is to propose an effective PLL to tackle this challenge. The proposed PLL is based on quasi-type-1 PLL (QT1-PLL), which provides a good filtering capability by using a moving average filter (MAF). To accelerate the transient behavior when disturbance occurs, a modified delay signal cancellation (DSC) operator is proposed and incorporated into the filtering stage of QT1-PLL. By using modified DSCs and MAFs in a cascaded way, the settling time of the proposed method is reduced to around one cycle of grid fundamental frequency without degrading any disturbance rejection capability. To verify the performance, several test cases, which usually happen in high renewable penetrated power systems, are carried out to demonstrate the effectiveness of the proposed PLL. China [7,8], and caused many wind turbines to be tripped off. This highly impacted the operation of power distribution and renewable energy utilization. The grid frequency is prone to deviate from its nominal value since the inertia of the grid decreases. Grid voltages contain an amount of undesired components, such as fundamental frequency negative sequences (FFNSs) and harmonic components, which results in unbalanced and distorted grid conditions. It is an essential requirement for a renewable energy power converter to maintain stable operation with high performance under such conditions. To achieve this goal, a proper grid synchronization method is needed for all grid-connected applications. It is a big challenge for a grid synchronization method to extract grid frequency and phase information under such adverse conditions.

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SSR Mitigation of Series-Compensated DFIG Wind Farms by a Nonlinear Damping Controller Using Partial Feedback Linearization

Cited by 77 publications

References 40 publications

Simplified Model to Study the Induction Generator Effect of the Subsynchronous Resonance Phenomenon

Simplified Model to Study the Induction Generator Effect of the Subsynchronous Resonance Phenomenon

Active damping of resonances in DFIG system with cascade converter under weak grid

A Modified DSC-Based Grid Synchronization Method for a High Renewable Penetrated Power System Under Distorted Voltage Conditions

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