Journal of Electrical Engineering and Technology

The Korean Institute of Electrical Engineers (대한전기학회)
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Coordinated Virtual Inertia Control Strategy for D-PMSG Considering Frequency Regulation Ability

  • Shi, Qiaoming (College of Electrical Engineering, Xi'an Jiaotong University) ;
  • Wang, Gang (National Key Laboratory of Vessel Integrated Power System Technology, Naval University of Engineering) ;
  • Ma, Weiming (National Key Laboratory of Vessel Integrated Power System Technology, Naval University of Engineering) ;
  • Fu, Lijun (National Key Laboratory of Vessel Integrated Power System Technology, Naval University of Engineering) ;
  • Wu, You (National Key Laboratory of Vessel Integrated Power System Technology, Naval University of Engineering) ;
  • Xing, Pengxiang (School of Electrical Engineering, Wuhan University)
  • Received : 2015.07.06
  • Accepted : 2016.06.22
  • Published : 2016.11.01
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Abstract

In the process of virtual inertia control (VIC), the frequency regulation capability of the directly-driven wind turbine with permanent-magnet synchronous generator (D-PMSG) on wind farm is related to its rotor kinetic energy and capacity margin. This paper proposes the method for assessing the D-PMSG frequency regulation capability and defining its coefficient according to the operating state of wind power generators. In addition, the calculating method of parameters in VIC is also discussed according to the principles of primary frequency regulation and inertia response of synchronous generators. Then, by introducing the capability coefficient into the proportion-differential virtual inertia control (PD-VIC) for power coordination, a coordinated virtual inertia control (C-VIC) strategy is developed, with the consideration of the difference in frequency regulation capability between wind power generators. The proposed control method can not only give full play to the frequency regulation capability of wind power generators, decrease the movements of the pitch angle control system but also bring some self-coordination capability to different wind power generators thus to avoid a secondary drop in system frequency. The simulations and experiments prove the proposed method to be effective and practicable.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China

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