Mechanism and characteristic analyses of subsynchronous oscillations caused by the interactions between direct‐drive wind turbines and weak AC power systems

Liu, Wei; Xie, Xiaorong; Liu, Huan; He, Jun

doi:10.1049/joe.2017.0612

Cited by 17 publications

(24 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The transfer functions at the discrete frequencies are obtained by manipulating (8) and (9), which yields a matrix equation given as…”

Section: Computing the Transfer Function Via Curve-fitting Techniquementioning

confidence: 99%

“…Recently, a new type of SSO phenomenon is reported in [1], which is mainly caused by the interaction between direct-drive wind turbines and weak AC grid [2,3]. The characteristics and mechanism of the newly found interaction have been widely studied [4][5][6][7][8][9]. However, modelling and stability analysis of the emerging SSO phenomena have always been a great challenge.…”

Section: Introductionmentioning

confidence: 99%

“…However, modelling and stability analysis of the emerging SSO phenomena have always been a great challenge. The conventional approaches such as state-space modelbased eigenvalue analysis [9][10][11] and the electromagnetic transient (EMT) model-based simulation [8,12] have been widely used for analysing the SSO issues in series compensated wind power systems. These methods become inefficient for analysing the emerging SSO, which involves large-scale heterogeneous wind farms and their complex control systems, thermal power plants, and other system side components.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Frequency‐coupled impedance model‐based sub‐synchronous interaction analysis for direct‐drive wind turbines connected to a weak AC grid

Liu

Xie

Shair

et al. 2019

IET Renewable Power Generation

Self Cite

View full text Add to dashboard Cite

Recently, emerging sub-synchronous oscillation (SSO) issues caused by the interaction between power electronic converters and weak AC grids have provoked serious stability concerns. Impedance-based modelling approaches have been widely employed for stability analysis of such interactions. In this study, a sequence-domain frequency-coupled impedance model (FCIM) and the corresponding stability criterion are proposed. First, a fast identification method of the FCIM is proposed, in which the impedance-frequency curves of the FCIMs at multiple frequencies are measured, followed by identification of their transfer function models. Next, the proposed method is applied to model a practical system, where a SSO event once occurred due to the interactions between direct-drive wind turbines and a weak AC grid. The individual FCIMs of wind turbine generators, steam turbine generators and static var generator in this system are derived. After that, an aggregated FCIM is formed by combining the FCIMs without extra coordinate transformation. Then, the aggregated FCIM-based stability analysis is carried out to investigate the interaction between the wind farms and weak AC grids. In the end, the results of FCIM-based stability analysis are verified by time-domain simulations.

show abstract

“…The transfer functions at the discrete frequencies are obtained by manipulating (8) and (9), which yields a matrix equation given as…”

Section: Computing the Transfer Function Via Curve-fitting Techniquementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Frequency‐coupled impedance model‐based sub‐synchronous interaction analysis for direct‐drive wind turbines connected to a weak AC grid

Liu

Xie

Shair

et al. 2019

IET Renewable Power Generation

Self Cite

View full text Add to dashboard Cite

show abstract

“…The associate editor coordinating the review of this manuscript and approving it for publication was Heng Wang . methods for studying the SSO phenomenon that occurs due to the large-scale integration of WECSs into weak AC systems, namely, electromagnetic transient (EMT) simulation, mode analysis, and impedance analysis [2]- [8]. The EMT simulation method can visually observe the dynamic characteristics of a wind farm under given grid scenarios.…”

Section: Introductionmentioning

confidence: 99%

“…In the mode analysis based method, the oscillation modes of the system can be easily obtained through eigenvalue analysis, and the main influencing factors can be clearly identified by comparing each participation factor of the system matrix. This method is widely used in analysing SSOs induced by different types of wind generators, such as wind farms with doubly fed induction generators [2]- [5] or permanent magnet synchronous generators (PMSGs) [6]- [8]. One study [4] studied the influence of wind farms' spatial distribution and the compensation level of parallel transmission lines on SSOs using mode analysis.…”

Section: Introductionmentioning

confidence: 99%

Subsynchronous Oscillation Analysis of Grid-Connected Converter Based on MIMO Transfer Functions

Zhang

Yuan

et al. 2020

IEEE Access

View full text Add to dashboard Cite

Subsynchronous oscillations (SSOs) induced by the interaction between wind farms based on direct-drive permanent magnet synchronous generators (D-PMSGs) and weak grids have attracted extensive attention. To better understand this SSO phenomenon, this paper derives multi-input multi-output (MIMO) transfer functions between the references of the current controller and the current of a grid-connected converter in the d-q frame, where the dynamic of PLL is considered. The dynamic of PLL lead to positive feedback in the MIMO transfer function, which impairs the stability of the overall system and induces the SSO phenomenon. Using the classical root locus method, the influence of correlated control parameters and different operation conditions on the system stability is substantially analysed. It is found that heavy load, low short circuit ratio (SCR) will intensify the SSO instability of system. Nonlinear electromagnetic transient simulations of a D-PMSG-based weak-grid-connected wind-farm system using PSCAD/EMTDC software effectively verify the correctness of the model proposed in the SSO analysis.

show abstract

Analysis of Subsynchronous Oscillation of Direct Drive PMSG Based Wind Farm Under Low Operating Condition

Yan

Jia

et al. 2020

J. Electr. Eng. Technol.

View full text Add to dashboard Cite

Mechanism and characteristic analyses of subsynchronous oscillations caused by the interactions between direct‐drive wind turbines and weak AC power systems

Cited by 17 publications

References 11 publications

Frequency‐coupled impedance model‐based sub‐synchronous interaction analysis for direct‐drive wind turbines connected to a weak AC grid

Frequency‐coupled impedance model‐based sub‐synchronous interaction analysis for direct‐drive wind turbines connected to a weak AC grid

Subsynchronous Oscillation Analysis of Grid-Connected Converter Based on MIMO Transfer Functions

Analysis of Subsynchronous Oscillation of Direct Drive PMSG Based Wind Farm Under Low Operating Condition

Contact Info

Product

Resources

About