Small Signal Stability Analysis of PMSG-VSG and Optimal Design for Control Parameters

Mi, Dengkai; Wang, Tong; Gao, Mingyang; Wang, Zengping

doi:10.1109/pesgm41954.2020.9282033

Cited by 8 publications

(4 citation statements)

References 9 publications

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“…However, the load-shedding operation reduces the power output from WTs and results in the waste of wind resources. The VSG schemes for PMSG-based WT under MPPT are reported in [22][23][24] to improve the inertia characteristics of WECS. Nevertheless, these studies have not considered the influence of WT dynamics and controls on the inertial response of WECS under load fluctuation.…”

Section: Related Workmentioning

confidence: 99%

“…This makes it possible for the distributed energy equipped with the above VSG to provide inertial frequency support for weak AC grid without PLL. In order to make VSWT have the grid-forming ability, several authors [20][21][22][23][24] explore the possibility of applying VSG controls in WECS, ref. [20] proposes a method that parallels the WT with an energy storage inverter that utilizes the VSG control.…”

Section: Related Workmentioning

confidence: 99%

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Damping torque coefficient analysis of PMSG‐based WT with VSG control considering wind turbine dynamics

Yuan

et al. 2022

IET Generation Trans & Dist

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This paper expands the damping torque coefficient analysis (DTCA) for studying the small‐signal stability of permanent magnet synchronous generator (PMSG)‐based wind turbine (WT) under virtual synchronous generator (VSG) control with consideration of WT dynamics. Firstly, the typical VSG is implemented in the grid‐side voltage source converter (GSVSC), which enables selfsynchronization without phase‐locked loop (PLL). The maximum power point track (MPPT) algorithms are utilized to give the power reference for VSG. Then, the corresponding inertia and damping support can be provided by the kinetic energy of PMSG. Based on the established model, the DTCA is analytically conducted to not only reveal the key factors that influence the WT stability but also provide guidance for parameter tuning. As a result, it is important to find that the WT dynamics impair the damping and even lead to system instability. Moreover, the minimum value of VSG damping control parameter is analytically given to ensure the system stability under any load below the rated wind speed. Finally, the case studies considering one single PMSG connected to a large grid with and without inclusion of WT dynamics are performed and compared to demonstrate the accuracy of the proposed model and evaluate the applications of DTCA.

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Damping torque coefficient analysis of PMSG‐based WT with VSG control considering wind turbine dynamics

Yuan

et al. 2022

IET Generation Trans & Dist

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“…D-PMSWG system is widely employed because it removes deteriorating parts like gearboxes, considerably reduces maintenance costs, and provides a reliable fault ride-through capability [1,2]. Permanent magnet synchronous generators (PMSGs) significantly contribute to the stability of power systems with their inherent damping and inertia [3], and have been considered a promising solution to high power wind turbine applications [4][5][6]. However, with the increasing penetration of wind power, the wind power system is connected to the grid via a power electronic inverter interface, which prevents the power system's functioning from being supported by inertia and damping.…”

Section: Introductionmentioning

confidence: 99%

A Dual Adaptive Inertia and Damping Control Strategy of ANFIS-VSG for Direct-drive Permanent Magnet Synchronous Wind Generator Systems

Zhang¹,

Chen²,

Deng³

et al. 2022

PIER C

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In the conventional virtual synchronous generator (VSG) dual adaptive inertia and damping control schemes, the inertia J and damping D exhibit different variation patterns in different time intervals and are mutually constrained. To address this problem, an adaptive neural-fuzzy network inference system (ANFIS)-based dual adaptive inertia and damping VSG control technique applied to the direct-drive permanent magnet synchronous wind generator (D-PMSWG) system is proposed in this paper. In ANFIS-VSG, the controller is designed on the basis of the ANFIS control principle, and the input and output data are collected by PID control. The Sugeno-type ANFIS controller model is adopted to train the fuzzy inference system (FIS) online. Moreover, the virtual inertia and damping coefficients can be dynamically adjusted in real time according to the frequency variation without taking the different variations and mutual constraints of inertia J and damping D in different intervals into consideration, so the design difficulty and calculation process can be simplified, and the accuracy of the proposed control algorithm is enhanced through training. Furthermore, when the system is subject to load changes, integrating into the grid from an islanded state, and when the output power sets value steps, the power-frequency characteristics and the anti-interference capability of the three-phase output current of VSG can be improved. Finally, the proposed control strategy is simulated and analyzed based on Matlab/Simulink simulation software, which proves the correctness and effectiveness of the proposed control algorithm.

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“…When the system oscillation frequency drifts or the grid operation conditions change significantly, it is difficult to guarantee the suppression effect of the damping device. The method of optimizing controller parameters [15][16][17][18][19] is to maximize the damping ratio of the interconnected system by coordinating and optimizing the control parameters of the wind turbine generator-side controller (MSC) and the grid-side controller (GSC), thereby changing the resonance point of the oscillation of the wind power system and the grid interaction. This method can fundamentally reduce the risk of system instability.…”

Section: Introductionmentioning

confidence: 99%

Research on sub/super‐synchronous oscillation suppression method for direct‐drive wind turbine based on energy compensation

Zhang

Phadke

2021

IET Renewable Power Gen

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A method to suppress sub/super-synchronous oscillation of direct-drive wind turbines based on energy compensation is proposed. First, the transient energy model of directdrive wind turbine is built, and the negative damping energy terms that lead the oscillation of direct-drive wind turbine are extracted. On this basis, the expressions of voltage compensation terms corresponding to negative damping energy terms are derived by backward deduction, thus supplementary energy branches are constructed, and their impact on fundamental frequency characteristics of wind turbine is analyzed. And then, with the compensation energy of supplementary branches reaching the maximum and the increment of fundamental-frequency voltage being the minimum as the objective, and with the frequency-domain characteristic and fundamental-frequency voltage characteristic of control links being satisfied as constraints, a scheme to optimize the compensation coefficients of multiple branches is established. Finally, the model of direct-drive wind turbine is built in RT-LAB for hardware-in-the-loop tests. Simulation results verify that, the method can realize fast frequency-dependent suppression of sub/super-synchronous oscillation in different frequency bands concerning different grid strengths.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Small Signal Stability Analysis of PMSG-VSG and Optimal Design for Control Parameters

Cited by 8 publications

References 9 publications

Damping torque coefficient analysis of PMSG‐based WT with VSG control considering wind turbine dynamics

Damping torque coefficient analysis of PMSG‐based WT with VSG control considering wind turbine dynamics

A Dual Adaptive Inertia and Damping Control Strategy of ANFIS-VSG for Direct-drive Permanent Magnet Synchronous Wind Generator Systems

Research on sub/super‐synchronous oscillation suppression method for direct‐drive wind turbine based on energy compensation

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