Dynamic Stability Analysis and Improved LVRT Schemes of DFIG-Based Wind Turbines During a Symmetrical Fault in a Weak Grid

Liu, Ruikuo; Ye, Jun; Wang, Xuewei; Sun, Peng; Pei, Jinxin; Hu, Jiabing

doi:10.1109/tpel.2019.2911346

Cited by 106 publications

(63 citation statements)

References 23 publications

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“…The optimal active current compensation controller can effectively improve the LVRT capability of DFIG-WTs. Due to the mechanism that reasonable active current injection can significantly improve the small signal stability of DFIG-WTs, a novel optimal active and reactive current proportion method was proposed in Reference [69]. The optimal active injection current varies with the active current reference, which can be calculated from the fault position.…”

Section: Linear Rsc Control Methodsmentioning

confidence: 99%

Low-Voltage Ride-Through Techniques in DFIG-Based Wind Turbines: A Review

Qin

Zhou

et al. 2020

Applied Sciences

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In recent years, considerable advances were made in wind power generation. The growing penetration of wind power makes it necessary for wind turbines to maintain continuous operation during voltage dips, which is stated as the low-voltage ride-through (LVRT) capability. Doubly fed induction generator (DFIG)-based wind turbines (DFIG-WTs), which are widely used in wind power generation, are sensitive to disturbances from the power grid. Therefore, several kinds of protection circuits and control methods are applied to DFIG-WTs for LVRT capability enhancement. This paper gives a comprehensive review and evaluation of the proposed LVRT solutions used in DFIG-WTs, including external retrofit methods and internal control techniques. In addition, future trends of LVRT solutions are also discussed in this paper.

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Section: Linear Rsc Control Methodsmentioning

confidence: 99%

Low-Voltage Ride-Through Techniques in DFIG-Based Wind Turbines: A Review

Qin

Zhou

et al. 2020

Applied Sciences

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“…Generally, the lesser amount of the fault current, the smaller the short circuit ratio. Therefore, the weaker the grid, the less stable system [19]. The IEEE 39 bus system can be divided into three zones, as given in Fig.…”

Section: A Test Power Systemmentioning

confidence: 99%

Exploring the Dynamic Voltage Signature of Renewable Rich Weak Power System

2020

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Large-scale renewable energy-based power plants are becoming attractive technically and economically for generation mix around the world. Nevertheless, network operation has significantly changed due to the rapid integration of renewable energy in supply side. The integration of more renewable resources, especially inverter-based generation, deteriorates power system resilience to disturbances and substantially affects stable operations. The dynamic voltage stability becomes one of the major concerns for the transmission system operators (TSOs) due to the limited capabilities of inverter-based resources (IBRs). A heavily loaded and stressed renewable rich grid is susceptible to fault-induced delayed voltage recovery. Hence, it is crucial to examine the system response upon disturbances, to understand the voltage signature, to determine the optimal location and sizing of grid-connected IBRs. Moreover, the IBRs fault contribution mechanism investigation is essential in adopting additional grid support devices, control coordination, and the selection of appropriate corrective control schemes. This paper utilizes a comprehensive assessment framework to assess power systems' dynamic voltage signature with large-scale PV under different realistic operating conditions. Several indices quantifying load bus voltage recovery have been used to explore the system's steady-state, transient response , and voltage trajectories. The recovery indices help extricate the signature and influence of IBRs. The proposed framework's applicability is carried out on the New England IEEE-39 bus test system using the DIgSILENT platform.

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“…In [9], LVRT enhancement of a PV system was achieved by optimally tuning of PI control parameters of both the DC-DC converter and the grid side inverter to reach the maximum power point tracking and increase the PCC voltage. Besides, the stability analysis of DERs, such as a doubly-fed induction generator (DFIG) with consideration of LVRT was evaluated in [10] and [11]. In [12], the LVRT ability of DFIG-WTs after the occurrence of symmetrical and unsymmetrical faults has been improved by controlling the stator voltage of DFIG through its rotor side converter.…”

Section: Introductionmentioning

confidence: 99%

A General Mathematical Model for LVRT Capability Assessment of DER-Penetrated Distribution Networks

et al. 2020

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Low voltage ride through (LVRT) is one of the indispensable issues of recent decade in the context of grid codes. LVRT stands for the ability of a generation facility to stay connected during the voltage dip. Despite the numerous discussions in recent works, but they mostly concentrate on the LVRTbased control of distributed energy resources (DERs) integrated into a microgrid and its improvement. However, what has been hidden and not addressed any more yet is an index to measure the LVRT capability of a DER-penetrated distribution network (DPDN) under different voltage sags. This takes precedence when we want to evaluate the LVRT capability of DPDNs with consideration of various LVRT categories of DERs mandated in IEEE 1547 standard. This paper introduces a general framework for LVRT assessment of a DPDN by solving a system of differential algebraic equations (DAEs). Then expected LVRT capability of a DPDN is evaluated by a proposed LVRT index through the implementation of Monte Carlo simulation technique. INDEX TERMS Differential algebraic equation (DAE), Distributed energy resource (DER), Penetrated distribution network (DPDN), Low voltage ride through (LVRT), Monte Carlo

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Dynamic Stability Analysis and Improved LVRT Schemes of DFIG-Based Wind Turbines During a Symmetrical Fault in a Weak Grid

Cited by 106 publications

References 23 publications

Low-Voltage Ride-Through Techniques in DFIG-Based Wind Turbines: A Review

Low-Voltage Ride-Through Techniques in DFIG-Based Wind Turbines: A Review

Exploring the Dynamic Voltage Signature of Renewable Rich Weak Power System

A General Mathematical Model for LVRT Capability Assessment of DER-Penetrated Distribution Networks

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