TY - JOUR
T1 - Control strategy for PMSG based wind turbines in fractional frequency offshore wind power system
AU - Song, Zhuoyan
AU - Wang, Xifan
AU - Tao, Weilong
AU - Meng, Yongqing
AU - Teng, Yufei
AU - Ning, Lianhui
N1 - Publisher Copyright:
©2014 State Grid Electric Power Research Institute Press
PY - 2014/6/10
Y1 - 2014/6/10
N2 - Offshore wind power integration via the fractional frequency transmission system (FFTS) has in recent years drawn attention worldwide. The fractional frequency offshore wind power system consisting of paralleled-connected multi-pole permanent magnet direct-drive synchronous generators (PMSGs), subsea cable, and an onshore cycloconverter possess a number of advantages. In this system, the cycloconverter is used to control the rotating speed of the wind turbines to harvest maximum wind power, and the generator-side converters of PMSGs are no longer needed to reduce the investment and operation and maintenance cost. A quasi-steady-model for fractional frequency offshore wind power system considering the influence of transformers and transmission lines is presented. In addition, a control scheme based on average rotor flux orientation is demonstrated. The multi-machine optimal speed can be obtained via curve-fitting. Furthermore, a simulation model for a fractional frequency offshore wind power system with four PMSG based wind turbines is developed. Simulation results show that the rotating speed of PMSG based wind turbines is able to follow the reference very well under various wind conditions, while the proposed system structure can harvest optimal wind energy.
AB - Offshore wind power integration via the fractional frequency transmission system (FFTS) has in recent years drawn attention worldwide. The fractional frequency offshore wind power system consisting of paralleled-connected multi-pole permanent magnet direct-drive synchronous generators (PMSGs), subsea cable, and an onshore cycloconverter possess a number of advantages. In this system, the cycloconverter is used to control the rotating speed of the wind turbines to harvest maximum wind power, and the generator-side converters of PMSGs are no longer needed to reduce the investment and operation and maintenance cost. A quasi-steady-model for fractional frequency offshore wind power system considering the influence of transformers and transmission lines is presented. In addition, a control scheme based on average rotor flux orientation is demonstrated. The multi-machine optimal speed can be obtained via curve-fitting. Furthermore, a simulation model for a fractional frequency offshore wind power system with four PMSG based wind turbines is developed. Simulation results show that the rotating speed of PMSG based wind turbines is able to follow the reference very well under various wind conditions, while the proposed system structure can harvest optimal wind energy.
KW - Fractional frequency transmission system (FFTS)
KW - Permanent magnet direct-drive generator
KW - Vector control
KW - Wind power generation
UR - https://www.scopus.com/pages/publications/84902659354
U2 - 10.7500/AEPS20130906017
DO - 10.7500/AEPS20130906017
M3 - 文章
AN - SCOPUS:84902659354
SN - 1000-1026
SP - 27
EP - 33
JO - Dianli Xitong Zidonghua/Automation of Electric Power Systems
JF - Dianli Xitong Zidonghua/Automation of Electric Power Systems
IS - 11
ER -