Optimal control of reactive power in an offshore wind farm with HVDC link

2017 ◽  
Author(s):  
Richard M. Tapia ◽  
Carlos F. Gallardo
Keyword(s):  
Optimal Control ◽  
Wind Farm ◽  
Reactive Power ◽  
Offshore Wind ◽  
Offshore Wind Farm

scholarly journals Transient Stability Enhancement of DFIG based Offshore Wind Farm Connected to a Power System Network using STATCOM

2018 ◽  
Vol 7 (3.12) ◽  
pp. 1303
Author(s):  
Varun Kumar ◽  
Vipin Patel ◽  
A S Pandey ◽  
S K Sinha ◽  
Dilip Kumar
Keyword(s):  
Power System ◽  
Wind Farm ◽  
Transient Stability ◽  
Reactive Power ◽  
Offshore Wind ◽  
Offshore Wind Farm ◽  
Aggregate Model ◽  
Power Requirement ◽  
Transient Disturbances ◽  
Terminal Voltage

This paper presents the transient stability enhance of DFIG-based offshore wind farm connected power system network using STATCOM. The studied system is simulated in MATLAB/Simulink platform for study the effect of transient disturbances like, three phases to ground fault, sudden load change, voltage sag & swell. A fully aggregate model of wind DFIG is used for simulation study of system. The DFIG based wind generator, more sensitive to the grid faults than other wind generators. During transient disturbances DFIG terminal voltage reduced below the critical value and hence DFIG trips. The external reactive power support is required for stabilization of wind farm during the transient disturbances. In studied system STATCOM is used to fulfil the reactive power requirement to stabilize the wind farm. In presence of STATCOM, DFIG does not trip during transient disturbances of power system and all bus voltages & DFIG terminal voltage are also improved. 

Simulated Onshore-Fault Ride through of Offshore Wind Farms Connected through VSC HVDC

2008 ◽  
Vol 32 (2) ◽  
pp. 103-113 ◽  
Author(s):  
A. Arulampalam ◽  
G. Ramtharan ◽  
N. Caliao ◽  
J.B. Ekanayake ◽  
N. Jenkins
Keyword(s):  
Wind Farm ◽  
Reactive Power ◽  
Wind Farms ◽  
Offshore Wind ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Offshore Wind Farm ◽  
Offshore Wind Farms ◽  
Grid Connection ◽  
Fault Ride Through

Effective Onshore-Fault Ride Through was demonstrated by simulation for a Fixed Speed Induction Generator (FSIG) offshore wind farm connected through a Voltage Source Converter HVDC link. When a terrestrial grid fault occurs, power through the onshore converter reduces and the DC link voltage increases. A control system was then used to block the offshore converter. The offshore AC network voltage was reduced to achieve rapid power rejection. Reactive power at the onshore converter was controlled to support the AC network voltage according to the GB Grid Code requirements. Two cases, a 200 ms terrestrial fault and a 50% retained voltage fault of duration 710 ms, at the grid connection point were studied. The simulation results show that power blocking at the offshore converter was effective and the DC link voltage was controlled.

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