Journal ArticleDOI
Quantitative SSR Analysis of Series-Compensated DFIG-Based Wind Farms Using Aggregated RLC Circuit Model
Reads0
Chats0
TLDR
In this paper, an improved impedance model (IM) is derived for a real-world power system with doubly-fed induction generators (DFIGs) interfaced with series-compensated power networks.Abstract:
A new type of subsynchronous resonance (SSR), namely, subsynchronous control interaction (SSCI), was recently observed in doubly-fed induction generators (DFIGs) interfaced with series-compensated power networks. In this paper, a more accurate method based on aggregated RLC circuit model is proposed to intuitively explain and quantitatively evaluate this type of SSR. For a practical power system containing multiple DFIGs and fixed series compensation, an improved impedance model (IM) is derived, which incorporates DFIG's full-scale control system. Around the series-resonant frequency, IM can be further represented with an aggregated RLC circuit model. Its equivalent parameters are worked out and then used for the quantitative assessment of potential SSR risk. The proposed method is applied for SSR analysis of a practical wind farm system in North China that experienced actual SSR incidents. The consistence between the obtained results and field measured data verifies its effectiveness very well. Further, its advantage in accuracy over existing impedance-based approaches is validated by both eigenvalue analysis and time-domain simulations. The method is also used to quantitatively investigate the impact on SSR stability from the various factors, including wind speed, number of online DFIGs and their control parameters.read more
Citations
More filters
Journal ArticleDOI
Subsynchronous Interaction Between Direct-Drive PMSG Based Wind Farms and Weak AC Networks
TL;DR: In this article, the authors investigated the interaction between direct-drive permanent magnetic synchronous generators (PMSG) and weak ac grids characterized by low short-circuit ratio, and showed that such interaction would cause negative-resistance effect for the SSI mode, leading to unstable oscillation.
Journal ArticleDOI
Definition and Classification of Power System Stability – Revisited & Extended
Nikos Hatziargyriou,Jovica V. Milanovic,Claudia Rahmann,Venkataramana Ajjarapu,Claudio A. Canizares,Istvan Erlich,David J. Hill,Ian A. Hiskens,Innocent Kamwa,Bikash C. Pal,Pouyan Pourbeik,Juan J. Sanchez-Gasca,Aleksandar M. Stankovic,Thierry Van Cutsem,Vijay Vittal,Costas Vournas +15 more
TL;DR: This paper based on an IEEE PES report summarizes the major results of the work of the Task Force and presents extended definitions and classification of power system stability.
Journal ArticleDOI
Characteristic Analysis of Subsynchronous Resonance in Practical Wind Farms Connected to Series-Compensated Transmissions
TL;DR: In this paper, the authors analyzed the field data of 58 subsynchronous resonance events captured in a practical wind power system and examined the observed dynamics with previous theoretical results, revealing the mechanism and characteristics of SSR in a more explicit and substantial way.
Journal ArticleDOI
An Oscillatory Stability Criterion Based on the Unified $dq$ -Frame Impedance Network Model for Power Systems With High-Penetration Renewables
Huakun Liu,Xiaorong Xie,Wei Liu +2 more
TL;DR: This paper presents the concept of a unified dq frame impedance network model (INM), with which different converters as well as traditional generators/HVDCs can be incorporated to form an integrated s-domain model of a practical system.
Journal ArticleDOI
Impedance Modeling and Stability Analysis of Grid-Connected DFIG-Based Wind Farm With a VSC-HVDC
TL;DR: The theoretical analysis results show that DFIGs behave as an inductance in series with a negative resistance at the resonance point, whose interaction with wind farm side VSC (WFVSC) constitutes an equivalent RLC resonance circuit with negative resistance, and the oscillation tends to occur due to the negative damping.
References
More filters
Book
Power System Stability and Control
TL;DR: In this article, the authors present a model for the power system stability problem in modern power systems based on Synchronous Machine Theory and Modelling, and a model representation of the synchronous machine representation in stability studies.
Book
Analysis of Electric Machinery
TL;DR: In this paper, the authors focus on the areas of electric power and electric drives and emphasize analysis and formulation for control applications and computer simulation, and present an industry reference for these areas.
Journal ArticleDOI
Impedance-Based Stability Criterion for Grid-Connected Inverters
TL;DR: In this paper, a new method to determine inverter-grid system stability using only the inverter output impedance and the grid impedance is developed, which can be applied to all current-source systems.
Journal ArticleDOI
Small-Signal Methods for AC Distributed Power Systems–A Review
TL;DR: In this article, a review of small-signal analysis for AC distributed power systems can be found in several new and emerging applications, and the compatibility of each type of models with state-space and impedance-based system analysis approaches is discussed.
Journal ArticleDOI
Approximate solution of the trust region problem by minimization over two-dimensional subspaces
TL;DR: Computational results are reported showing that the two-dimensional minimization approach gives nearly optimal reductions in then-dimension quadratic model over a wide range of test cases.