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

2020 ◽  
Vol 16 (1) ◽  
pp. 1-13
Author(s):  
Gangui Yan ◽  
Wenbo Hu ◽  
Qi Jia ◽  
Kan Liu ◽  
Junxi Wang
Keyword(s):  
Wind Farm ◽  
Direct Drive ◽  
Operating Condition ◽  
Subsynchronous Oscillation

scholarly journals Impedance Modeling Based Method for Sub/Supsynchronous Oscillation Analysis of D-PMSG Wind Farm

2019 ◽  
Vol 9 (14) ◽  
pp. 2831
Author(s):  
Saijun Yuan ◽  
Zhiguo Hao ◽  
Tao Zhang ◽  
Xiaotian Yuan ◽  
Jin Shu
Keyword(s):  
Wind Farm ◽  
Synchronous Generator ◽  
Critical Issue ◽  
Direct Drive ◽  
Subsynchronous Oscillation ◽  
Impedance Model ◽  
Oscillation Analysis ◽  
Grid Impedance ◽  
Impedance Modeling ◽  
First Time

Subsynchronous oscillation (SSO) is a critical issue for the direct-drive permanent magnet synchronous generator (D-PMSG) based wind farm integrated to a weak onshore AC grid. To analyze the mechanism of the SSO phenomenon of D-PMSG based wind farm, widely used impedance-based stability analysis method is utilized in this paper. First, the impedance model based on the harmonic linearization theory of grid-connected D-PMSG is proposed, and the mechanism of sub/supsynchronous currents coupling is analyzed quantitatively for the first time. Then, based on the impedance model and relative stability criterion, the influence of wind farm operating parameters and grid impedance on stability is discussed. Simulations are carried out to verify the correctness of theoretical analysis.

Overview of Subsynchronous Oscillation in Grid-connected Wind Farm

2020 ◽  
Vol 13 (7) ◽  
pp. 969-979
Author(s):  
Xu Pei-Zhen ◽  
Lu Yong-Geng ◽  
Cao Xi-Min
Keyword(s):  
Power Systems ◽  
Wind Turbine ◽  
Large Scale ◽  
Wind Farm ◽  
Wind Farms ◽  
Induction Generator ◽  
Future Research ◽  
Stable Operation ◽  
Subsynchronous Oscillation ◽  
Different Types

Background: Over the past few years, the subsynchronous oscillation (SSO) caused by the grid-connected wind farm had a bad influence on the stable operation of the system and has now become a bottleneck factor restricting the efficient utilization of wind power. How to mitigate and suppress the phenomenon of SSO of wind farms has become the focus of power system research. Methods: This paper first analyzes the SSO of different types of wind turbines, including squirrelcage induction generator based wind turbine (SCIG-WT), permanent magnet synchronous generator- based wind turbine (PMSG-WT), and doubly-fed induction generator based wind turbine (DFIG-WT). Then, the mechanisms of different types of SSO are proposed with the aim to better understand SSO in large-scale wind integrated power systems, and the main analytical methods suitable for studying the SSO of wind farms are summarized. Results: On the basis of results, using additional damping control suppression methods to solve SSO caused by the flexible power transmission devices and the wind turbine converter is recommended. Conclusion: The current development direction of the SSO of large-scale wind farm grid-connected systems is summarized and the current challenges and recommendations for future research and development are discussed.

Commonly Used Wind Generator Systems: A Comparison Note

2017 ◽  
Vol 7 (2) ◽  
pp. 299
Author(s):  
Prashanth N.A ◽  
P Sujatha
Keyword(s):  
Wind Turbine ◽  
Wind Farm ◽  
High Efficiency ◽  
Low Cost ◽  
Maintenance Cost ◽  
Induction Generator ◽  
Doubly Fed Induction Generator ◽  
Direct Drive ◽  
Gear Box ◽  
Doubly Fed

<p>Amongst all renewable energy generation sources, wind power exhibits fastest growth rate. The increasing number of wind farm installations worldwide demand low maintenance, cost and failure rates with high efficiency. Determining the optimal drive train configuration amongst various configurations available for wind turbines is a challenge. In this paper commonly used, doubly fed induction generator with single stage gear box (GDFIG), doubly fed induction generator with multi stage gear box (DFIG) and the direct-drive permanent-magnet generator (DDPMG) are compared. Modelling of wind turbine with efficiency computations is presented. Considering common wind turbine parameters, performance of GDFIG, DFIG and DDPMG is compared through an experimental study. Considering a reference 5 MW variable speed wind turbine, efficiency of DDPMG is 96% when compared to 93.58%, 93.12% for DFIG and GDFIG. The experimental results presented prove that the DDPMG is a preferable solution considering low cost and high efficiency.</p>

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