Impact of Phase Locked Loop with Different Types and Control Dynamics on Resonance of DFIG System

Din, Zakiud; Zhang, Jianzhong; Bassi, Hussain; Rawa, Muhyaddin; Song, Yipeng

doi:10.3390/en13051039

Cited by 13 publications

(8 citation statements)

References 28 publications

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“…The phase locked loop (PLL) is a crucial factor in finding the phase angle information for the coordinate transformation in the grid‐connected system. The bandwidth of the PLL has a significant impact on the impedance modeling, and hence the resonance in the DFIG system, as reported by authors in [243]. The phase‐locking angle and frequency jitter are associated with the traditional PLL under voltage dips and swell.…”

Section: Future Trendsmentioning

confidence: 97%

Recent development and future trends of resonance in doubly fed induction generator system under weak grid

Din

Zhang

Zheng

et al. 2022

IET Renewable Power Gen

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In recent years, the wind energy conversion system faces significant challenges for stable and secure operations, especially in the weak grid due to high penetration of wind energy into the grid. Doubly fed induction generator (DFIG) is one of the most popular wind turbine generators due to its cost‐effective variable speed and low‐cost partial size power converter. Impedance interaction between series or parallel compensated weak grid and the DFIG system causes sub‐synchronous resonance (SSR) and high‐frequency resonance (HFR). A comprehensive review of the state‐of‐the‐art SSR and HFR in the DFIG system under a weak grid is presented. First, based on features, such as supplementary hardware, linear and non‐linear control strategies, the resonance damping techniques are classified into different types. Then, the advantages and disadvantages of SSR analysis and damping techniques techniques are put forward. Moreover, the latest development of state‐of‐the‐art SSR and HFR analysis and damping techniques are supplemented. Finally, the contemporary and future trends of the SSR and HFR techniques are discussed.

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Section: Future Trendsmentioning

confidence: 97%

Recent development and future trends of resonance in doubly fed induction generator system under weak grid

Din

Zhang

Zheng

et al. 2022

IET Renewable Power Gen

Self Cite

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“…According to Figure 3, the RSC controller is employed to control the active/reactive power of the converter, and the GSC controller is applied to control the reactive power and DC link voltage between the two converters [20]. According to references [21][22][23][24][25], a wind farm can be modeled as an equivalent wind farm because all the parameters of a wind farm are similar to an equivalent wind farm. The total power is equal to the total installed capacity of the wind turbines.…”

Section: Model Of Dfig-based Wind Farmmentioning

confidence: 99%

Damping of Subsynchronous Resonance in Utility DFIG-Based Wind Farms Using Wide-Area Fuzzy Control Approach

et al. 2022

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This paper presents a novel fuzzy control scheme for damping the subsynchronous resonance (SSR) according to the wide-area measurement system (WAMS) in power systems including doubly fed induction generator (DFIG)-based wind farms connected to series capacitive compensated transmission networks. The SSR damping is attained by adding the fuzzy controller as a supplementary signal at the stator voltage loop of the grid-side converter (GSC) of DFIG wind farms. Additionally, time delays due to communication signals are important when using WAMSs. If the time delays are ignored, it causes system instability. In this paper, the time delays are modeled with a separate fuzzy input to the controller. The new fuzzy control approach is executed by using the angular velocity of synchronous generators (w) and its variation in the angular velocity (dw/dt). The effectiveness and success of the WAMS-based fuzzy controller is demonstrated by comparison with the particle swarm optimization (PSO) and imperialist competitive algorithm (ICA) optimization methods. The efficacy and validity of the planned auxiliary damping control are verified on a modified version of the IEEE second benchmark model including DFIG-based wind farms via time simulations using the MATLAB/Simulink toolbox.

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“…In our case, the proposed controllers are fully independent from the system parameters, since no decoupling terms as those used in the standard technique, are considered to exist anymore in both the proposed inner-loop controllers. Furthermore, as shown by Equations (13) and (22), the inner-loop current controllers are of the familiar to the industrial engineers PI-linear type (plus a linear damping term), directly providing their output as the duty-ratio input signal of dor q-component. Hence, a significant novelty of the controllers' design has been introduced with the cost of a cumbersome nonlinear analysis, since nonlinear terms are involved into the first three equations of (24).…”

Section: The Closed-loop Systemmentioning

confidence: 99%

“…In Reference [13], it is studied the impact of phase-locked loop (PLL) on impedance modeling and resonance in a doubly fed induction generator RES with a parallel compensated weak grid. In Reference [14], a thorough analysis of the effect mechanism of frequency variation on the weak grid-connected VSI system stability in a dc voltage control timescale is presented.…”

Section: Introductionmentioning

confidence: 99%

Validation of Novel PLL-driven PI Control Schemes on Supporting VSIs in Weak AC-Connections

2020

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The integration of distributed energy resources (DERs) in modern power systems has substantially changed the local control capabilities of the grid since the majority of DERs are connected through a controlled dc/ac inverter interface. Such long-distance located DER installations, usually represented by current regulated dc sources, can inject large amounts of power into the main ac grid at points where the strength of the ac connection is low. The efficient and stable performance of such a power scheme is related to the capability of the control applied to retain the power extraction close to the maximum and simultaneously to regulate the dc-side voltage as well as the ac-side voltage magnitude at the weak ac connection point. This is implemented by designing the controllers of the voltage source inverters (VSIs) in a manner that reliably satisfies the above tasks. To this end, decentralized cascaded control schemes, driven by novel, locally implemented phase locked loops (PLLs), suitable to work in weak ac connections, are proposed for the VSI performance regulation by using new fast inner-loop proportional-integral (PI) current controllers. A decisive innovation is proposed by inserting an extra damping term in the inner-loop controllers to guarantee stability and convergence to the desired equilibrium. This is analytically proven by a rigorous analysis based on the entire nonlinear system model, where advanced Lyapunov-based methods are deployed in detail. As a good transient response of the VSI interface is indeed critical for the energy and grid system management, the conducted simulation and experimental results confirm that the proposed scheme efficiently supports the ac- and dc-side voltages of the VSI under different varying conditions in the power production or any voltage changes of the main grid.

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Impact of Phase Locked Loop with Different Types and Control Dynamics on Resonance of DFIG System

Cited by 13 publications

References 28 publications

Recent development and future trends of resonance in doubly fed induction generator system under weak grid

Recent development and future trends of resonance in doubly fed induction generator system under weak grid

Damping of Subsynchronous Resonance in Utility DFIG-Based Wind Farms Using Wide-Area Fuzzy Control Approach

Validation of Novel PLL-driven PI Control Schemes on Supporting VSIs in Weak AC-Connections

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